快速入門：影像分析 4.0

發行項
09/04/2024

開始使用影像分析 4.0 REST API 或用戶端 SDK 來設定基本影像分析應用程式。影像分析服務為您提供 AI 演算法，以便處理影像及傳回其視覺功能的資訊。請遵循下列步驟將套件安裝至您的應用程式，並試用範例程式碼。

使用適用於 .NET 的影像分析用戶端 SDK 來讀取影像中的文字，並產生影像標題。本快速入門會分析遠端影像，並將結果列印至主控台。

參考文件 | 套件 (NuGet) | 範例

提示

分析 4.0 API 可以執行許多不同的作業。如需展示所有可用功能的範例，請參閱分析影像操作指南。

必要條件

Azure 訂用帳戶 - 建立免費帳戶

已啟用具有工作負載 .NET 桌面開發的 Visual Studio IDE。或者，如果您不打算使用 Visual Studio IDE，則需要安裝 .NET SDK。
擁有 Azure 訂閱之後，請在 Azure 入口網站中建立電腦視覺資源。為了使用本快速入門中的輔助字幕功能，您必須在其中一個受支援的 Azure 區域中建立資源 (請參閱影像標題 (部分機器翻譯))。在其部署後，選取 [前往資源]。
- 您需要來自所建立資源的金鑰和端點，以便將應用程式連線至 Azure AI 視覺服務。
- 您可以使用免費定價層 (F0) 來試用服務，之後可升級至付費層以用於實際執行環境。

設定應用程式

建立新的 C# 應用程式。

Visual Studio IDE
CLI

開啟 Visual Studio，然後在 [開始] 下，選取 [建立新專案]。將範本篩選設定為 C#/所有平台/主控台。選取 [主控台應用程式] (可在 Windows、Linux 和 macOS 上的 .NET 上執行的命令列應用程式)，然後選擇 [下一步]。將專案名稱更新為 ImageAnalysisQuickstart，然後選擇 [下一步]。選取 .NET 6.0 或更新版本，然後選擇 [建立] 以建立專案。

安裝用戶端 SDK

建立新專案後，以滑鼠右鍵按一下 [方案總管] 中的專案解決方案，然後選取 [管理 NuGet 套件]，以安裝用戶端 SDK。在開啟的套件管理員中，選取 [瀏覽]、核取 [包含發行前版本]，然後搜尋 Azure.AI.Vision.ImageAnalysis。選取安裝。

在主控台視窗中 (例如 cmd、PowerShell 或 Bash)，使用 dotnet new 命令建立名為 image-analysis-quickstart 的新主控台應用程式。此命令會建立簡單的 "Hello World" C# 專案，內含單一原始程式檔：Program.cs。

dotnet new console -n image-analysis-quickstart

將目錄變更為新建立的應用程式資料夾。您可以使用下列命令來建置應用程式：

dotnet build

建置輸出應該不會有警告或錯誤。

...
Build succeeded.
  0 Warning(s)
  0 Error(s)
...

安裝用戶端 SDK

在應用程式目錄中，使用下列命令安裝適用於 .NET 的影像分析 SDK：

dotnet add package Azure.AI.Vision.ImageAnalysis --prerelease

建立環境變數

在此範例中，在執行應用程式的本機電腦上將認證寫入環境變數。

前往 Azure 入口網站。如果已成功部署您在 [必要條件] 區段中建立的資源，請選取 [後續步驟] 下的 [前往資源] 按鈕。您可以在 [金鑰和端點] 頁面中 [資源管理] 底下找到金鑰和端點。您的資源金鑰與您的 Azure 訂用帳戶識別碼不同。

若要設定金鑰和端點的環境變數，請開啟主控台視窗，然後遵循作業系統和開發環境的指示進行。

若要設定 VISION_KEY 環境變數，請以您其中一個資源索引碼取代 <your_key>。
若要設定 VISION_ENDPOINT 環境變數，請將 <your_endpoint> 取代為您資源的端點。

重要

如果您使用 API 金鑰，請將其安全地儲存在別處，例如 Azure Key Vault。請勿在程式碼中直接包含 API 金鑰，且切勿公開張貼金鑰。

如需 AI 服務安全性的詳細資訊，請參閱驗證對 Azure AI 服務的要求 (英文)。

Windows
Linux

setx VISION_KEY <your_key>

setx VISION_ENDPOINT <your_endpoint>

新增環境變數之後，您可能需要重新啟動任何將讀取環境變數的執行中程式，包括主控台視窗。

export VISION_KEY=<your_key>

export VISION_ENDPOINT=<your_endpoint>

新增環境變數之後，請從主控台視窗執行 source ~/.bashrc，讓變更生效。

分析影像

從專案目錄，開啟先前隨著您的新專案建立的 Program.cs 檔案。貼上下列程式碼：

提示

此程式碼顯示分析影像 URL。您也可以分析本機影像檔案，或記憶體緩衝區的影像。如需詳細資訊，請參閱分析影像操作指南 (部分機器翻譯)。

using Azure;
using Azure.AI.Vision.ImageAnalysis;
using System;

public class Program
{
    static void AnalyzeImage()
    {
        string endpoint = Environment.GetEnvironmentVariable("VISION_ENDPOINT");
        string key = Environment.GetEnvironmentVariable("VISION_KEY");

        ImageAnalysisClient client = new ImageAnalysisClient(
            new Uri(endpoint),
            new AzureKeyCredential(key));

        ImageAnalysisResult result = client.Analyze(
            new Uri("https://learn.microsoft.com/azure/ai-services/computer-vision/media/quickstarts/presentation.png"),
            VisualFeatures.Caption | VisualFeatures.Read,
            new ImageAnalysisOptions { GenderNeutralCaption = true });

        Console.WriteLine("Image analysis results:");
        Console.WriteLine(" Caption:");
        Console.WriteLine($"   '{result.Caption.Text}', Confidence {result.Caption.Confidence:F4}");

        Console.WriteLine(" Read:");
        foreach (DetectedTextBlock block in result.Read.Blocks)
            foreach (DetectedTextLine line in block.Lines)
            {
                Console.WriteLine($"   Line: '{line.Text}', Bounding Polygon: [{string.Join(" ", line.BoundingPolygon)}]");
                foreach (DetectedTextWord word in line.Words)
                {
                    Console.WriteLine($"     Word: '{word.Text}', Confidence {word.Confidence.ToString("#.####")}, Bounding Polygon: [{string.Join(" ", word.BoundingPolygon)}]");
                }
            }
    }

    static void Main()
    {
        try
        {
            AnalyzeImage();
        }
        catch (Exception e)
        {
            Console.WriteLine(e);
        }
    }
}

Visual Studio IDE
CLI

從 IDE 視窗頂端的 [偵錯] 功能表選取 [開始偵錯] (或按 F5) 來建置並執行應用程式。

使用這些命令從您的應用程式目錄建置並執行應用程式：

dotnet build
dotnet run

輸出

主控台輸出應該會顯示類似下列文字的內容：

Caption:
   "a person pointing at a screen", Confidence 0.4892
Text:
   Line: '9:35 AM', Bounding polygon {{X=130,Y=129},{X=215,Y=130},{X=215,Y=149},{X=130,Y=148}}
     Word: '9:35', Bounding polygon {{X=131,Y=130},{X=171,Y=130},{X=171,Y=149},{X=130,Y=149}}, Confidence 0.9930
     Word: 'AM', Bounding polygon {{X=179,Y=130},{X=204,Y=130},{X=203,Y=149},{X=178,Y=149}}, Confidence 0.9980
   Line: 'E Conference room 154584354', Bounding polygon {{X=130,Y=153},{X=224,Y=154},{X=224,Y=161},{X=130,Y=161}}
     Word: 'E', Bounding polygon {{X=131,Y=154},{X=135,Y=154},{X=135,Y=161},{X=131,Y=161}}, Confidence 0.1040
     Word: 'Conference', Bounding polygon {{X=142,Y=154},{X=174,Y=154},{X=173,Y=161},{X=141,Y=161}}, Confidence 0.9020
     Word: 'room', Bounding polygon {{X=175,Y=154},{X=189,Y=155},{X=188,Y=161},{X=175,Y=161}}, Confidence 0.7960
     Word: '154584354', Bounding polygon {{X=192,Y=155},{X=224,Y=154},{X=223,Y=162},{X=191,Y=161}}, Confidence 0.8640
   Line: '#: 555-173-4547', Bounding polygon {{X=130,Y=163},{X=182,Y=164},{X=181,Y=171},{X=130,Y=170}}
     Word: '#:', Bounding polygon {{X=131,Y=163},{X=139,Y=164},{X=139,Y=171},{X=131,Y=171}}, Confidence 0.0360
     Word: '555-173-4547', Bounding polygon {{X=142,Y=164},{X=182,Y=165},{X=181,Y=171},{X=142,Y=171}}, Confidence 0.5970
   Line: 'Town Hall', Bounding polygon {{X=546,Y=180},{X=590,Y=180},{X=590,Y=190},{X=546,Y=190}}
     Word: 'Town', Bounding polygon {{X=547,Y=181},{X=568,Y=181},{X=568,Y=190},{X=546,Y=191}}, Confidence 0.9810
     Word: 'Hall', Bounding polygon {{X=570,Y=181},{X=590,Y=181},{X=590,Y=191},{X=570,Y=190}}, Confidence 0.9910
   Line: '9:00 AM - 10:00 AM', Bounding polygon {{X=546,Y=191},{X=596,Y=192},{X=596,Y=200},{X=546,Y=199}}
     Word: '9:00', Bounding polygon {{X=546,Y=192},{X=555,Y=192},{X=555,Y=200},{X=546,Y=200}}, Confidence 0.0900
     Word: 'AM', Bounding polygon {{X=557,Y=192},{X=565,Y=192},{X=565,Y=200},{X=557,Y=200}}, Confidence 0.9910
     Word: '-', Bounding polygon {{X=567,Y=192},{X=569,Y=192},{X=569,Y=200},{X=567,Y=200}}, Confidence 0.6910
     Word: '10:00', Bounding polygon {{X=570,Y=192},{X=585,Y=193},{X=584,Y=200},{X=570,Y=200}}, Confidence 0.8850
     Word: 'AM', Bounding polygon {{X=586,Y=193},{X=593,Y=194},{X=593,Y=200},{X=586,Y=200}}, Confidence 0.9910
   Line: 'Aaron Buaion', Bounding polygon {{X=543,Y=201},{X=581,Y=201},{X=581,Y=208},{X=543,Y=208}}
     Word: 'Aaron', Bounding polygon {{X=545,Y=202},{X=560,Y=202},{X=559,Y=208},{X=544,Y=208}}, Confidence 0.6020
     Word: 'Buaion', Bounding polygon {{X=561,Y=202},{X=580,Y=202},{X=579,Y=208},{X=560,Y=208}}, Confidence 0.2910        
   Line: 'Daily SCRUM', Bounding polygon {{X=537,Y=259},{X=575,Y=260},{X=575,Y=266},{X=537,Y=265}}
     Word: 'Daily', Bounding polygon {{X=538,Y=259},{X=551,Y=260},{X=550,Y=266},{X=538,Y=265}}, Confidence 0.1750
     Word: 'SCRUM', Bounding polygon {{X=552,Y=260},{X=570,Y=260},{X=570,Y=266},{X=551,Y=266}}, Confidence 0.1140
   Line: '10:00 AM 11:00 AM', Bounding polygon {{X=536,Y=266},{X=590,Y=266},{X=590,Y=272},{X=536,Y=272}}
     Word: '10:00', Bounding polygon {{X=539,Y=267},{X=553,Y=267},{X=552,Y=273},{X=538,Y=272}}, Confidence 0.8570
     Word: 'AM', Bounding polygon {{X=554,Y=267},{X=561,Y=267},{X=560,Y=273},{X=553,Y=273}}, Confidence 0.9980
     Word: '11:00', Bounding polygon {{X=564,Y=267},{X=578,Y=267},{X=577,Y=273},{X=563,Y=273}}, Confidence 0.4790
     Word: 'AM', Bounding polygon {{X=579,Y=267},{X=586,Y=267},{X=585,Y=273},{X=578,Y=273}}, Confidence 0.9940
   Line: 'Churlette de Crum', Bounding polygon {{X=538,Y=273},{X=584,Y=273},{X=585,Y=279},{X=538,Y=279}}
     Word: 'Churlette', Bounding polygon {{X=539,Y=274},{X=562,Y=274},{X=561,Y=279},{X=538,Y=279}}, Confidence 0.4640     
     Word: 'de', Bounding polygon {{X=563,Y=274},{X=569,Y=274},{X=568,Y=279},{X=562,Y=279}}, Confidence 0.8100
     Word: 'Crum', Bounding polygon {{X=570,Y=274},{X=582,Y=273},{X=581,Y=279},{X=569,Y=279}}, Confidence 0.8850
   Line: 'Quarterly NI Hands', Bounding polygon {{X=538,Y=295},{X=588,Y=295},{X=588,Y=301},{X=538,Y=302}}
     Word: 'Quarterly', Bounding polygon {{X=540,Y=296},{X=562,Y=296},{X=562,Y=302},{X=539,Y=302}}, Confidence 0.5230     
     Word: 'NI', Bounding polygon {{X=563,Y=296},{X=570,Y=296},{X=570,Y=302},{X=563,Y=302}}, Confidence 0.3030
     Word: 'Hands', Bounding polygon {{X=572,Y=296},{X=588,Y=296},{X=588,Y=302},{X=571,Y=302}}, Confidence 0.6130
   Line: '11.00 AM-12:00 PM', Bounding polygon {{X=536,Y=304},{X=588,Y=303},{X=588,Y=309},{X=536,Y=310}}
     Word: '11.00', Bounding polygon {{X=538,Y=304},{X=552,Y=304},{X=552,Y=310},{X=538,Y=310}}, Confidence 0.6180
     Word: 'AM-12:00', Bounding polygon {{X=554,Y=304},{X=578,Y=304},{X=577,Y=310},{X=553,Y=310}}, Confidence 0.2700      
     Word: 'PM', Bounding polygon {{X=579,Y=304},{X=586,Y=304},{X=586,Y=309},{X=578,Y=310}}, Confidence 0.6620
   Line: 'Bebek Shaman', Bounding polygon {{X=538,Y=310},{X=577,Y=310},{X=577,Y=316},{X=538,Y=316}}
     Word: 'Bebek', Bounding polygon {{X=539,Y=310},{X=554,Y=310},{X=554,Y=317},{X=539,Y=316}}, Confidence 0.6110
     Word: 'Shaman', Bounding polygon {{X=555,Y=310},{X=576,Y=311},{X=576,Y=317},{X=555,Y=317}}, Confidence 0.6050        
   Line: 'Weekly stand up', Bounding polygon {{X=537,Y=332},{X=582,Y=333},{X=582,Y=339},{X=537,Y=338}}
     Word: 'Weekly', Bounding polygon {{X=538,Y=332},{X=557,Y=333},{X=556,Y=339},{X=538,Y=338}}, Confidence 0.6060        
     Word: 'stand', Bounding polygon {{X=558,Y=333},{X=572,Y=334},{X=571,Y=340},{X=557,Y=339}}, Confidence 0.4890
     Word: 'up', Bounding polygon {{X=574,Y=334},{X=580,Y=334},{X=580,Y=340},{X=573,Y=340}}, Confidence 0.8150
   Line: '12:00 PM-1:00 PM', Bounding polygon {{X=537,Y=340},{X=583,Y=340},{X=583,Y=347},{X=536,Y=346}}
     Word: '12:00', Bounding polygon {{X=539,Y=341},{X=553,Y=341},{X=552,Y=347},{X=538,Y=347}}, Confidence 0.8260
     Word: 'PM-1:00', Bounding polygon {{X=554,Y=341},{X=575,Y=341},{X=574,Y=347},{X=553,Y=347}}, Confidence 0.2090       
     Word: 'PM', Bounding polygon {{X=576,Y=341},{X=583,Y=341},{X=582,Y=347},{X=575,Y=347}}, Confidence 0.0390
   Line: 'Delle Marckre', Bounding polygon {{X=538,Y=347},{X=582,Y=347},{X=582,Y=352},{X=538,Y=353}}
     Word: 'Delle', Bounding polygon {{X=540,Y=348},{X=559,Y=347},{X=558,Y=353},{X=539,Y=353}}, Confidence 0.5800
     Word: 'Marckre', Bounding polygon {{X=560,Y=347},{X=582,Y=348},{X=582,Y=353},{X=559,Y=353}}, Confidence 0.2750       
   Line: 'Product review', Bounding polygon {{X=538,Y=370},{X=577,Y=370},{X=577,Y=376},{X=538,Y=375}}
     Word: 'Product', Bounding polygon {{X=539,Y=370},{X=559,Y=371},{X=558,Y=376},{X=539,Y=376}}, Confidence 0.6150       
     Word: 'review', Bounding polygon {{X=560,Y=371},{X=576,Y=371},{X=575,Y=376},{X=559,Y=376}}, Confidence 0.0400

清除資源

如果您想要清除和移除 Azure AI 服務訂用帳戶，則可以刪除資源或資源群組。刪除資源群組也會刪除與其相關聯的任何其他資源。

下一步

在本快速入門中，您已了解如何安裝影像分析用戶端 SDK，並進行基本的影像分析呼叫。接下來，深入了解分析 4.0 API 功能。

呼叫分析影像 4.0 API

影像分析概觀
您可以在 GitHub 上找到範例原始程式碼。

使用適用於 Python 的影像分析用戶端 SDK 來讀取影像中的文字，並產生影像標題。本快速入門會分析遠端影像，並將結果列印至主控台。

參考文件 | 套件 (PyPi) | 範例

提示

分析 4.0 API 可以執行許多不同的作業。如需展示所有可用功能的範例，請參閱分析影像操作指南。

必要條件

Azure 訂用帳戶 - 建立免費帳戶
Python 3.x。您安裝的 Python 應包含 pip。您可以在命令列上執行 pip --version 來檢查是否已安裝 pip。安裝最新版本的 Python 以取得 pip。
擁有 Azure 訂閱之後，請在 Azure 入口網站中建立電腦視覺資源。為了使用本快速入門中的輔助字幕功能，您必須在其中一個受支援的 Azure 區域中建立資源 (請參閱影像標題 (部分機器翻譯) 以取得區域清單)。在其部署後，選取 [前往資源]。
- 您需要來自所建立資源的金鑰和端點，以便將應用程式連線至 Azure AI 視覺服務。
- 您可以使用免費定價層 (F0) 來試用服務，之後可升級至付費層以用於實際執行環境。

建立環境變數

在此範例中，在執行應用程式的本機電腦上將認證寫入環境變數。

若要設定金鑰和端點的環境變數，請開啟主控台視窗，然後遵循作業系統和開發環境的指示進行。

若要設定 VISION_KEY 環境變數，請以您其中一個資源索引碼取代 <your_key>。
若要設定 VISION_ENDPOINT 環境變數，請將 <your_endpoint> 取代為您資源的端點。

重要

如果您使用 API 金鑰，請將其安全地儲存在別處，例如 Azure Key Vault。請勿在程式碼中直接包含 API 金鑰，且切勿公開張貼金鑰。

如需 AI 服務安全性的詳細資訊，請參閱驗證對 Azure AI 服務的要求 (英文)。

Windows
Linux

setx VISION_KEY <your_key>

setx VISION_ENDPOINT <your_endpoint>

新增環境變數之後，您可能需要重新啟動任何將讀取環境變數的執行中程式，包括主控台視窗。

export VISION_KEY=<your_key>

export VISION_ENDPOINT=<your_endpoint>

新增環境變數之後，請從主控台視窗執行 source ~/.bashrc，讓變更生效。

分析影像

開啟要新增專案的命令提示字元，然後建立名為 quickstart.py 的新檔案。

執行此命令以安裝影像分析 SDK：

pip install azure-ai-vision-imageanalysis

將下列程式碼複製到 quickstart.py：

提示

此程式碼顯示分析影像 URL。您也可以分析來自程式記憶體緩衝區的影像。如需詳細資訊，請參閱分析影像操作指南 (部分機器翻譯)。

import os
from azure.ai.vision.imageanalysis import ImageAnalysisClient
from azure.ai.vision.imageanalysis.models import VisualFeatures
from azure.core.credentials import AzureKeyCredential

# Set the values of your computer vision endpoint and computer vision key
# as environment variables:
try:
    endpoint = os.environ["VISION_ENDPOINT"]
    key = os.environ["VISION_KEY"]
except KeyError:
    print("Missing environment variable 'VISION_ENDPOINT' or 'VISION_KEY'")
    print("Set them before running this sample.")
    exit()

# Create an Image Analysis client
client = ImageAnalysisClient(
    endpoint=endpoint,
    credential=AzureKeyCredential(key)
)

# Get a caption for the image. This will be a synchronously (blocking) call.
result = client.analyze_from_url(
    image_url="https://learn.microsoft.com/azure/ai-services/computer-vision/media/quickstarts/presentation.png",
    visual_features=[VisualFeatures.CAPTION, VisualFeatures.READ],
    gender_neutral_caption=True,  # Optional (default is False)
)

print("Image analysis results:")
# Print caption results to the console
print(" Caption:")
if result.caption is not None:
    print(f"   '{result.caption.text}', Confidence {result.caption.confidence:.4f}")

# Print text (OCR) analysis results to the console
print(" Read:")
if result.read is not None:
    for line in result.read.blocks[0].lines:
        print(f"   Line: '{line.text}', Bounding box {line.bounding_polygon}")
        for word in line.words:
            print(f"     Word: '{word.text}', Bounding polygon {word.bounding_polygon}, Confidence {word.confidence:.4f}")

然後使用快速入門檔案上的 python 命令執行應用程式。
```
python quickstart.py
```

輸出

主控台輸出應該會顯示類似下列文字的內容：

Caption:
   'a person pointing at a screen', Confidence 0.4892
Text:
   Line: '9:35 AM', Bounding polygon {130, 129, 215, 130, 215, 149, 130, 148}
     Word: '9:35', Bounding polygon {131, 130, 171, 130, 171, 149, 130, 149}, Confidence 0.9930
     Word: 'AM', Bounding polygon {179, 130, 204, 130, 203, 149, 178, 149}, Confidence 0.9980
   Line: 'E Conference room 154584354', Bounding polygon {130, 153, 224, 154, 224, 161, 130, 161}
     Word: 'E', Bounding polygon {131, 154, 135, 154, 135, 161, 131, 161}, Confidence 0.1040
     Word: 'Conference', Bounding polygon {142, 154, 174, 154, 173, 161, 141, 161}, Confidence 0.9020
     Word: 'room', Bounding polygon {175, 154, 189, 155, 188, 161, 175, 161}, Confidence 0.7960
     Word: '154584354', Bounding polygon {192, 155, 224, 154, 223, 162, 191, 161}, Confidence 0.8640
   Line: '#: 555-173-4547', Bounding polygon {130, 163, 182, 164, 181, 171, 130, 170}
     Word: '#:', Bounding polygon {131, 163, 139, 164, 139, 171, 131, 171}, Confidence 0.0360
     Word: '555-173-4547', Bounding polygon {142, 164, 182, 165, 181, 171, 142, 171}, Confidence 0.5970
   Line: 'Town Hall', Bounding polygon {546, 180, 590, 180, 590, 190, 546, 190}
     Word: 'Town', Bounding polygon {547, 181, 568, 181, 568, 190, 546, 191}, Confidence 0.9810
     Word: 'Hall', Bounding polygon {570, 181, 590, 181, 590, 191, 570, 190}, Confidence 0.9910
   Line: '9:00 AM - 10:00 AM', Bounding polygon {546, 191, 596, 192, 596, 200, 546, 199}
     Word: '9:00', Bounding polygon {546, 192, 555, 192, 555, 200, 546, 200}, Confidence 0.0900
     Word: 'AM', Bounding polygon {557, 192, 565, 192, 565, 200, 557, 200}, Confidence 0.9910
     Word: '-', Bounding polygon {567, 192, 569, 192, 569, 200, 567, 200}, Confidence 0.6910
     Word: '10:00', Bounding polygon {570, 192, 585, 193, 584, 200, 570, 200}, Confidence 0.8850
     Word: 'AM', Bounding polygon {586, 193, 593, 194, 593, 200, 586, 200}, Confidence 0.9910
   Line: 'Aaron Buaion', Bounding polygon {543, 201, 581, 201, 581, 208, 543, 208}
     Word: 'Aaron', Bounding polygon {545, 202, 560, 202, 559, 208, 544, 208}, Confidence 0.6020
     Word: 'Buaion', Bounding polygon {561, 202, 580, 202, 579, 208, 560, 208}, Confidence 0.2910
   Line: 'Daily SCRUM', Bounding polygon {537, 259, 575, 260, 575, 266, 537, 265}
     Word: 'Daily', Bounding polygon {538, 259, 551, 260, 550, 266, 538, 265}, Confidence 0.1750
     Word: 'SCRUM', Bounding polygon {552, 260, 570, 260, 570, 266, 551, 266}, Confidence 0.1140
   Line: '10:00 AM 11:00 AM', Bounding polygon {536, 266, 590, 266, 590, 272, 536, 272}
     Word: '10:00', Bounding polygon {539, 267, 553, 267, 552, 273, 538, 272}, Confidence 0.8570
     Word: 'AM', Bounding polygon {554, 267, 561, 267, 560, 273, 553, 273}, Confidence 0.9980
     Word: '11:00', Bounding polygon {564, 267, 578, 267, 577, 273, 563, 273}, Confidence 0.4790
     Word: 'AM', Bounding polygon {579, 267, 586, 267, 585, 273, 578, 273}, Confidence 0.9940
   Line: 'Churlette de Crum', Bounding polygon {538, 273, 584, 273, 585, 279, 538, 279}
     Word: 'Churlette', Bounding polygon {539, 274, 562, 274, 561, 279, 538, 279}, Confidence 0.4640
     Word: 'de', Bounding polygon {563, 274, 569, 274, 568, 279, 562, 279}, Confidence 0.8100
     Word: 'Crum', Bounding polygon {570, 274, 582, 273, 581, 279, 569, 279}, Confidence 0.8850
   Line: 'Quarterly NI Hands', Bounding polygon {538, 295, 588, 295, 588, 301, 538, 302}
     Word: 'Quarterly', Bounding polygon {540, 296, 562, 296, 562, 302, 539, 302}, Confidence 0.5230
     Word: 'NI', Bounding polygon {563, 296, 570, 296, 570, 302, 563, 302}, Confidence 0.3030
     Word: 'Hands', Bounding polygon {572, 296, 588, 296, 588, 302, 571, 302}, Confidence 0.6130
   Line: '11.00 AM-12:00 PM', Bounding polygon {536, 304, 588, 303, 588, 309, 536, 310}
     Word: '11.00', Bounding polygon {538, 304, 552, 304, 552, 310, 538, 310}, Confidence 0.6180
     Word: 'AM-12:00', Bounding polygon {554, 304, 578, 304, 577, 310, 553, 310}, Confidence 0.2700
     Word: 'PM', Bounding polygon {579, 304, 586, 304, 586, 309, 578, 310}, Confidence 0.6620
   Line: 'Bebek Shaman', Bounding polygon {538, 310, 577, 310, 577, 316, 538, 316}
     Word: 'Bebek', Bounding polygon {539, 310, 554, 310, 554, 317, 539, 316}, Confidence 0.6110
     Word: 'Shaman', Bounding polygon {555, 310, 576, 311, 576, 317, 555, 317}, Confidence 0.6050
   Line: 'Weekly stand up', Bounding polygon {537, 332, 582, 333, 582, 339, 537, 338}
     Word: 'Weekly', Bounding polygon {538, 332, 557, 333, 556, 339, 538, 338}, Confidence 0.6060
     Word: 'stand', Bounding polygon {558, 333, 572, 334, 571, 340, 557, 339}, Confidence 0.4890
     Word: 'up', Bounding polygon {574, 334, 580, 334, 580, 340, 573, 340}, Confidence 0.8150
   Line: '12:00 PM-1:00 PM', Bounding polygon {537, 340, 583, 340, 583, 347, 536, 346}
     Word: '12:00', Bounding polygon {539, 341, 553, 341, 552, 347, 538, 347}, Confidence 0.8260
     Word: 'PM-1:00', Bounding polygon {554, 341, 575, 341, 574, 347, 553, 347}, Confidence 0.2090
     Word: 'PM', Bounding polygon {576, 341, 583, 341, 582, 347, 575, 347}, Confidence 0.0390
   Line: 'Delle Marckre', Bounding polygon {538, 347, 582, 347, 582, 352, 538, 353}
     Word: 'Delle', Bounding polygon {540, 348, 559, 347, 558, 353, 539, 353}, Confidence 0.5800
     Word: 'Marckre', Bounding polygon {560, 347, 582, 348, 582, 353, 559, 353}, Confidence 0.2750
   Line: 'Product review', Bounding polygon {538, 370, 577, 370, 577, 376, 538, 375}
     Word: 'Product', Bounding polygon {539, 370, 559, 371, 558, 376, 539, 376}, Confidence 0.6150
     Word: 'review', Bounding polygon {560, 371, 576, 371, 575, 376, 559, 376}, Confidence 0.0400

清除資源

如果您想要清除和移除 Azure AI 服務訂用帳戶，則可以刪除資源或資源群組。刪除資源群組也會刪除與其相關聯的任何其他資源。

下一步

在本快速入門中，您已了解如何安裝影像分析用戶端 SDK，並進行基本的影像分析呼叫。接下來，深入了解分析 4.0 API 功能。

呼叫分析影像 4.0 API

影像分析概觀
您可以在 GitHub 上找到範例原始程式碼。

使用適用於 Java 的影像分析用戶端 SDK 來讀取影像中的文字，並產生影像標題。本快速入門會分析遠端影像，並將結果列印至主控台。

參考文件 | Maven 套件 | 範例

提示

分析 4.0 API 可以執行許多不同的作業。如需展示所有可用功能的範例，請參閱分析影像操作指南。

必要條件

Windows 10 (或更高版本) x64，或 Linux x64 機器。
已安裝 JAVA 開發套件 (JDK) 第 8 版或更新版本，例如 Azul Zulu OpenJDK、Microsoft Build of OpenJDK、Oracle JAVA 或您慣用的 JDK。從命令列執行 java -version，以查看您的版本並確認安裝成功。請確定 JAVA 安裝是系統架構的原生安裝，而且不會透過模擬執行。
已安裝 Apache Maven (英文)。在 Linux上，從發行版本存放庫安裝 (如有)。執行 mvn -v 以確認安裝成功。
Azure 訂用帳戶 - 建立免費帳戶
擁有 Azure 訂閱之後，請在 Azure 入口網站中建立電腦視覺資源。為了使用本快速入門中的輔助字幕功能，您必須在其中一個受支援的 Azure 區域中建立資源 (請參閱影像標題 (部分機器翻譯))。在其部署後，選取 [前往資源]。
- 您需要來自所建立資源的金鑰和端點，以便將應用程式連線至 Azure AI 視覺服務。
- 您可以使用免費定價層 (F0) 來試用服務，之後可升級至付費層以用於實際執行環境。

設定應用程式

開啟主控台視窗，並為快速入門應用程式建立新的資料夾。

開啟文字編輯器，並將下列內容複製到新的檔案。將檔案儲存為您專案目錄中的 pom.xml

<project xmlns="http://maven.apache.org/POM/4.0.0"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
  <modelVersion>4.0.0</modelVersion>
  <groupId>com.example</groupId>
  <artifactId>my-application-name</artifactId>
  <version>1.0.0</version>
  <dependencies>
    <!-- https://mvnrepository.com/artifact/com.azure/azure-ai-vision-imageanalysis -->
    <dependency>
      <groupId>com.azure</groupId>
      <artifactId>azure-ai-vision-imageanalysis</artifactId>
      <version>1.0.0-beta.2</version>
    </dependency>
    <!-- https://mvnrepository.com/artifact/org.slf4j/slf4j-nop -->
    <dependency>
      <groupId>org.slf4j</groupId>
      <artifactId>slf4j-nop</artifactId>
      <version>1.7.36</version>
    </dependency>
  </dependencies>
</project>

根據 Maven 存放庫中 azure-ai-vision-imageanalysis 套件的最新可用版本來更新版本值 (1.0.0-beta.2)。
在專案目錄中執行下列動作，以安裝 SDK 和相依性：
```
mvn clean dependency:copy-dependencies
```
作業成功之後，請確認資料夾 target\dependency 已建立，且包含 .jar 檔案。

建立環境變數

在此範例中，在執行應用程式的本機電腦上將認證寫入環境變數。

若要設定金鑰和端點的環境變數，請開啟主控台視窗，然後遵循作業系統和開發環境的指示進行。

若要設定 VISION_KEY 環境變數，請以您其中一個資源索引碼取代 <your_key>。
若要設定 VISION_ENDPOINT 環境變數，請將 <your_endpoint> 取代為您資源的端點。

重要

如果您使用 API 金鑰，請將其安全地儲存在別處，例如 Azure Key Vault。請勿在程式碼中直接包含 API 金鑰，且切勿公開張貼金鑰。

如需 AI 服務安全性的詳細資訊，請參閱驗證對 Azure AI 服務的要求 (英文)。

Windows
Linux

setx VISION_KEY <your_key>

setx VISION_ENDPOINT <your_endpoint>

新增環境變數之後，您可能需要重新啟動任何將讀取環境變數的執行中程式，包括主控台視窗。

export VISION_KEY=<your_key>

export VISION_ENDPOINT=<your_endpoint>

新增環境變數之後，請從主控台視窗執行 source ~/.bashrc，讓變更生效。

分析影像

開啟文字編輯器，並將下列內容複製到新的檔案。將檔案儲存為 ImageAnalysis.java

import com.azure.ai.vision.imageanalysis.*;
import com.azure.ai.vision.imageanalysis.models.*;
import com.azure.core.credential.KeyCredential;
import java.util.Arrays;

public class ImageAnalysisQuickStart {

    public static void main(String[] args) {

        String endpoint = System.getenv("VISION_ENDPOINT");
        String key = System.getenv("VISION_KEY");

        if (endpoint == null || key == null) {
            System.out.println("Missing environment variable 'VISION_ENDPOINT' or 'VISION_KEY'.");
            System.out.println("Set them before running this sample.");
            System.exit(1);
        }

        // Create a synchronous Image Analysis client.
        ImageAnalysisClient client = new ImageAnalysisClientBuilder()
            .endpoint(endpoint)
            .credential(new KeyCredential(key))
            .buildClient();

        // This is a synchronous (blocking) call.
        ImageAnalysisResult result = client.analyzeFromUrl(
            "https://learn.microsoft.com/azure/ai-services/computer-vision/media/quickstarts/presentation.png",
            Arrays.asList(VisualFeatures.CAPTION, VisualFeatures.READ),
            new ImageAnalysisOptions().setGenderNeutralCaption(true));

        // Print analysis results to the console
        System.out.println("Image analysis results:");
        System.out.println(" Caption:");
        System.out.println("   \"" + result.getCaption().getText() + "\", Confidence "
            + String.format("%.4f", result.getCaption().getConfidence()));
        System.out.println(" Read:");
        for (DetectedTextLine line : result.getRead().getBlocks().get(0).getLines()) {
            System.out.println("   Line: '" + line.getText()
                + "', Bounding polygon " + line.getBoundingPolygon());
            for (DetectedTextWord word : line.getWords()) {
                System.out.println("     Word: '" + word.getText()
                    + "', Bounding polygon " + word.getBoundingPolygon()
                    + ", Confidence " + String.format("%.4f", word.getConfidence()));
            }
        }
    }
}

提示

該程式碼會分析來自 URL 的影像。您也可以分析來自程式記憶體緩衝區的影像。如需詳細資訊，請參閱分析影像操作指南 (部分機器翻譯)。

若要編譯 JAVA 檔案，請執行下列命令：

javac ImageAnalysis.java -cp ".;target/dependency/*"

您應該會看到在目前資料夾中建立的檔案 ImageAnalysis.class。

若要執行應用程式，請執行下列命令：

java -cp ".;target/dependency/*" ImageAnalysis

輸出

主控台輸出應該會顯示類似下列文字的內容：

Image analysis results:
 Caption:
   "a person pointing at a screen", Confidence 0.7768
 Read:
   Line: '9:35 AM', Bounding polygon [(x=131, y=130), (x=214, y=130), (x=214, y=148), (x=131, y=148)]
     Word: '9:35', Bounding polygon [(x=132, y=130), (x=172, y=131), (x=171, y=149), (x=131, y=148)], Confidence 0.9770
     Word: 'AM', Bounding polygon [(x=180, y=131), (x=203, y=131), (x=202, y=149), (x=180, y=149)], Confidence 0.9980
   Line: 'Conference room 154584354', Bounding polygon [(x=132, y=153), (x=224, y=153), (x=224, y=161), (x=132, y=160)]
     Word: 'Conference', Bounding polygon [(x=143, y=153), (x=174, y=154), (x=174, y=161), (x=143, y=161)], Confidence 0.6930
     Word: 'room', Bounding polygon [(x=176, y=154), (x=188, y=154), (x=188, y=161), (x=176, y=161)], Confidence 0.9590
     Word: '154584354', Bounding polygon [(x=192, y=154), (x=224, y=154), (x=223, y=161), (x=192, y=161)], Confidence 0.7050
   Line: ': 555-123-4567', Bounding polygon [(x=133, y=164), (x=183, y=164), (x=183, y=170), (x=133, y=170)]
     Word: ':', Bounding polygon [(x=134, y=165), (x=137, y=165), (x=136, y=171), (x=133, y=171)], Confidence 0.1620
     Word: '555-123-4567', Bounding polygon [(x=143, y=165), (x=182, y=165), (x=181, y=171), (x=143, y=171)], Confidence 0.6530
   Line: 'Town Hall', Bounding polygon [(x=545, y=178), (x=588, y=179), (x=588, y=190), (x=545, y=190)]
     Word: 'Town', Bounding polygon [(x=545, y=179), (x=569, y=180), (x=569, y=190), (x=545, y=190)], Confidence 0.9880
     Word: 'Hall', Bounding polygon [(x=571, y=180), (x=589, y=180), (x=589, y=190), (x=571, y=190)], Confidence 0.9900
   Line: '9:00 AM - 10:00 AM', Bounding polygon [(x=545, y=191), (x=596, y=191), (x=596, y=199), (x=545, y=198)]
     Word: '9:00', Bounding polygon [(x=546, y=191), (x=556, y=192), (x=556, y=199), (x=546, y=199)], Confidence 0.7580
     Word: 'AM', Bounding polygon [(x=558, y=192), (x=565, y=192), (x=564, y=199), (x=558, y=199)], Confidence 0.9890
     Word: '-', Bounding polygon [(x=567, y=192), (x=570, y=192), (x=569, y=199), (x=567, y=199)], Confidence 0.8960
     Word: '10:00', Bounding polygon [(x=571, y=192), (x=585, y=192), (x=585, y=199), (x=571, y=199)], Confidence 0.7970
     Word: 'AM', Bounding polygon [(x=587, y=192), (x=594, y=193), (x=593, y=199), (x=586, y=199)], Confidence 0.9940
   Line: 'Aaron Blaion', Bounding polygon [(x=542, y=201), (x=581, y=201), (x=581, y=207), (x=542, y=207)]
     Word: 'Aaron', Bounding polygon [(x=545, y=201), (x=560, y=202), (x=560, y=208), (x=545, y=208)], Confidence 0.7180
     Word: 'Blaion', Bounding polygon [(x=562, y=202), (x=579, y=202), (x=579, y=207), (x=562, y=207)], Confidence 0.2740
   Line: 'Daily SCRUM', Bounding polygon [(x=537, y=258), (x=574, y=259), (x=574, y=266), (x=537, y=265)]
     Word: 'Daily', Bounding polygon [(x=538, y=259), (x=551, y=259), (x=551, y=266), (x=538, y=265)], Confidence 0.4040
     Word: 'SCRUM', Bounding polygon [(x=553, y=259), (x=570, y=260), (x=570, y=265), (x=553, y=266)], Confidence 0.6970
   Line: '10:00 AM-11:00 AM', Bounding polygon [(x=535, y=266), (x=589, y=265), (x=589, y=272), (x=535, y=273)]
     Word: '10:00', Bounding polygon [(x=539, y=267), (x=553, y=266), (x=552, y=273), (x=539, y=274)], Confidence 0.2190
     Word: 'AM-11:00', Bounding polygon [(x=554, y=266), (x=578, y=266), (x=578, y=272), (x=554, y=273)], Confidence 0.1750
     Word: 'AM', Bounding polygon [(x=580, y=266), (x=587, y=266), (x=586, y=272), (x=580, y=272)], Confidence 1.0000
   Line: 'Charlene de Crum', Bounding polygon [(x=538, y=272), (x=588, y=273), (x=588, y=279), (x=538, y=279)]
     Word: 'Charlene', Bounding polygon [(x=538, y=273), (x=562, y=273), (x=562, y=280), (x=538, y=280)], Confidence 0.3220
     Word: 'de', Bounding polygon [(x=563, y=273), (x=569, y=273), (x=569, y=280), (x=563, y=280)], Confidence 0.9100
     Word: 'Crum', Bounding polygon [(x=570, y=273), (x=582, y=273), (x=583, y=280), (x=571, y=280)], Confidence 0.8710
   Line: 'Quarterly NI Handa', Bounding polygon [(x=537, y=295), (x=588, y=295), (x=588, y=302), (x=537, y=302)]
     Word: 'Quarterly', Bounding polygon [(x=539, y=296), (x=563, y=296), (x=563, y=302), (x=538, y=302)], Confidence 0.6030
     Word: 'NI', Bounding polygon [(x=564, y=296), (x=570, y=296), (x=571, y=302), (x=564, y=302)], Confidence 0.7300
     Word: 'Handa', Bounding polygon [(x=572, y=296), (x=588, y=296), (x=588, y=302), (x=572, y=302)], Confidence 0.9050
   Line: '11.00 AM-12:00 PM', Bounding polygon [(x=538, y=303), (x=587, y=303), (x=587, y=309), (x=538, y=309)]
     Word: '11.00', Bounding polygon [(x=539, y=303), (x=552, y=303), (x=553, y=309), (x=539, y=310)], Confidence 0.6710
     Word: 'AM-12:00', Bounding polygon [(x=554, y=303), (x=578, y=303), (x=578, y=309), (x=554, y=309)], Confidence 0.6560
     Word: 'PM', Bounding polygon [(x=579, y=303), (x=586, y=303), (x=586, y=309), (x=580, y=309)], Confidence 0.4540
   Line: 'Bobek Shemar', Bounding polygon [(x=538, y=310), (x=577, y=310), (x=577, y=316), (x=538, y=316)]
     Word: 'Bobek', Bounding polygon [(x=539, y=310), (x=554, y=311), (x=554, y=317), (x=539, y=317)], Confidence 0.6320
     Word: 'Shemar', Bounding polygon [(x=556, y=311), (x=576, y=311), (x=577, y=317), (x=556, y=317)], Confidence 0.2190
   Line: 'Weekly aband up', Bounding polygon [(x=538, y=332), (x=583, y=333), (x=583, y=339), (x=538, y=338)]
     Word: 'Weekly', Bounding polygon [(x=539, y=333), (x=557, y=333), (x=557, y=339), (x=539, y=339)], Confidence 0.5750
     Word: 'aband', Bounding polygon [(x=558, y=334), (x=573, y=334), (x=573, y=339), (x=558, y=339)], Confidence 0.4750
     Word: 'up', Bounding polygon [(x=574, y=334), (x=580, y=334), (x=580, y=339), (x=574, y=339)], Confidence 0.8650
   Line: '12:00 PM-1:00 PM', Bounding polygon [(x=538, y=339), (x=585, y=339), (x=585, y=346), (x=538, y=346)]
     Word: '12:00', Bounding polygon [(x=539, y=339), (x=553, y=340), (x=553, y=347), (x=539, y=346)], Confidence 0.7090
     Word: 'PM-1:00', Bounding polygon [(x=554, y=340), (x=575, y=340), (x=575, y=346), (x=554, y=347)], Confidence 0.9080
     Word: 'PM', Bounding polygon [(x=576, y=340), (x=583, y=340), (x=583, y=346), (x=576, y=346)], Confidence 0.9980
   Line: 'Danielle MarchTe', Bounding polygon [(x=538, y=346), (x=583, y=346), (x=583, y=352), (x=538, y=352)]
     Word: 'Danielle', Bounding polygon [(x=539, y=347), (x=559, y=347), (x=559, y=352), (x=539, y=353)], Confidence 0.1960
     Word: 'MarchTe', Bounding polygon [(x=560, y=347), (x=582, y=347), (x=582, y=352), (x=560, y=352)], Confidence 0.5710
   Line: 'Product reviret', Bounding polygon [(x=537, y=370), (x=578, y=370), (x=578, y=375), (x=537, y=375)]
     Word: 'Product', Bounding polygon [(x=539, y=370), (x=559, y=370), (x=559, y=376), (x=539, y=375)], Confidence 0.7000
     Word: 'reviret', Bounding polygon [(x=560, y=370), (x=578, y=371), (x=578, y=375), (x=560, y=376)], Confidence 0.2180

清除資源

如果您想要清除和移除 Azure AI 服務訂用帳戶，則可以刪除資源或資源群組。刪除資源群組也會刪除與其相關聯的任何其他資源。

下一步

在本快速入門中，您已了解如何安裝影像分析用戶端 SDK，並進行基本的影像分析呼叫。接下來，深入了解分析 4.0 API 功能。

呼叫分析影像 4.0 API

影像分析概觀
您可以在 GitHub 上找到範例原始程式碼。

使用適用於 JavaScript 的影像分析用戶端 SDK 來讀取影像中的文字，並產生影像標題。本快速入門會分析遠端影像，並將結果列印至主控台。

參考文件 | 套件 (npm) | 範例

提示

分析 4.0 API 可以執行許多不同的作業。如需展示所有可用功能的範例，請參閱分析影像操作指南。

必要條件

Azure 訂用帳戶 - 建立免費帳戶
最新版的 Node.js
目前版本的 Edge、Chrome、Firefox 或 Safari 網際網路瀏覽器。
擁有 Azure 訂用帳戶之後，在 Azure 入口網站中建立電腦視覺資源，以取得您的金鑰和端點。為了使用本快速入門中的輔助字幕功能，您必須在其中一個受支援的 Azure 區域中建立資源 (請參閱影像標題 (部分機器翻譯) 以取得區域清單)。在其部署後，選取 [前往資源]。
- 您需要來自所建立資源的金鑰和端點，以便將應用程式連線至 Azure AI 視覺服務。
- 您可以使用免費定價層 (F0) 來試用服務，之後可升級至付費層以用於實際執行環境。

建立環境變數

在此範例中，在執行應用程式的本機電腦上將認證寫入環境變數。

若要設定金鑰和端點的環境變數，請開啟主控台視窗，然後遵循作業系統和開發環境的指示進行。

若要設定 VISION_KEY 環境變數，請以您其中一個資源索引碼取代 <your_key>。
若要設定 VISION_ENDPOINT 環境變數，請將 <your_endpoint> 取代為您資源的端點。

重要

如果您使用 API 金鑰，請將其安全地儲存在別處，例如 Azure Key Vault。請勿在程式碼中直接包含 API 金鑰，且切勿公開張貼金鑰。

如需 AI 服務安全性的詳細資訊，請參閱驗證對 Azure AI 服務的要求 (英文)。

Windows
Linux

setx VISION_KEY <your_key>

setx VISION_ENDPOINT <your_endpoint>

新增環境變數之後，您可能需要重新啟動任何將讀取環境變數的執行中程式，包括主控台視窗。

export VISION_KEY=<your_key>

export VISION_ENDPOINT=<your_endpoint>

新增環境變數之後，請從主控台視窗執行 source ~/.bashrc，讓變更生效。

分析影像

建立新的 Node.js 應用程式

在主控台視窗 (例如 cmd、PowerShell 或 Bash) 中，為您的應用程式建立新的目錄，並瀏覽至該目錄。
```
mkdir myapp && cd myapp
```
執行命令 npm init，以使用 package.json 檔案建立節點應用程式。
```
npm init
```
安裝用戶端程式庫

安裝 @azure-rest/ai-vision-image-analysis npm 套件：
```
npm install @azure-rest/ai-vision-image-analysis
```
一併安裝 dotenv 套件：
```
npm install dotenv
```
您應用程式的 package.json 檔案會隨著相依性而更新。

建立新檔案 index.js。在文字編輯器中將其開啟，然後貼上下列程式碼。

const { ImageAnalysisClient } = require('@azure-rest/ai-vision-image-analysis');
const createClient = require('@azure-rest/ai-vision-image-analysis').default;
const { AzureKeyCredential } = require('@azure/core-auth');

// Load the .env file if it exists
require("dotenv").config();

const endpoint = process.env['VISION_ENDPOINT'];
const key = process.env['VISION_KEY'];

const credential = new AzureKeyCredential(key);
const client = createClient(endpoint, credential);

const features = [
  'Caption',
  'Read'
];

const imageUrl = 'https://learn.microsoft.com/azure/ai-services/computer-vision/media/quickstarts/presentation.png';

async function analyzeImageFromUrl() {
  const result = await client.path('/imageanalysis:analyze').post({
    body: {
        url: imageUrl
    },
    queryParameters: {
        features: features
    },
    contentType: 'application/json'
  });

  const iaResult = result.body;

  if (iaResult.captionResult) {
    console.log(`Caption: ${iaResult.captionResult.text} (confidence: ${iaResult.captionResult.confidence})`);
  }
  if (iaResult.readResult) {
    iaResult.readResult.blocks.forEach(block => console.log(`Text Block: ${JSON.stringify(block)}`));
  }
}

analyzeImageFromUrl();

使用快速入門檔案上使用 node 命令執行應用程式。
```
node index.js
```

清除資源

如果您想要清除和移除 Azure AI 服務訂用帳戶，則可以刪除資源或資源群組。刪除資源群組也會刪除與其相關聯的任何其他資源。

下一步

在本快速入門中，您已了解如何安裝影像分析用戶端程式庫，並進行基本的影像分析呼叫。接下來，深入了解分析 API 功能。

呼叫分析 API

影像分析概觀
此範例的原始程式碼可以在 GitHub 上找到。

使用影像分析 REST API 來讀取文字並產生影像的標題 (僅限版本 4.0)。

提示

分析 4.0 API 可以執行許多不同的作業。如需展示所有可用功能的範例，請參閱分析影像操作指南。

必要條件

Azure 訂用帳戶 - 建立免費帳戶
擁有 Azure 訂用帳戶之後，在 Azure 入口網站中建立電腦視覺資源，以取得您的金鑰和端點。為了使用本快速入門中的輔助字幕功能，您必須在特定 Azure 區域中建立您的資源。請參閱區域可用性 (英文)。在其部署後，選取 [前往資源]。
- 您將需要來自所建立資源的金鑰和端點，以便將應用程式連線至 Azure AI 視覺服務。您稍後會在快速入門中將金鑰和端點貼到下列程式碼中。
- 您可以使用免費定價層 (F0) 來試用服務，之後可升級至付費層以用於實際執行環境。
已安裝 cURL

分析影像

若要分析影像中的各種視覺特徵，請執行下列步驟：

將下列 curl 命令複製到文字編輯器。

curl.exe -H "Ocp-Apim-Subscription-Key: <subscriptionKey>" -H "Content-Type: application/json" "<endpoint>/computervision/imageanalysis:analyze?features=caption,read&model-version=latest&language=en&api-version=2024-02-01" -d "{'url':'https://learn.microsoft.com/azure/ai-services/computer-vision/media/quickstarts/presentation.png'}"

視需要在命令中進行下列變更：
1. 以您的視覺資源金鑰取代 <subscriptionKey> 的值。
2. 以您的視覺資源端點 URL 取代 <endpoint> 的值。例如： https://YourResourceName.cognitiveservices.azure.com 。
3. (選擇性) 將要求本文 (https://learn.microsoft.com/azure/ai-services/computer-vision/media/quickstarts/presentation.png) 中的影像 URL 變更為要分析之不同影像的 URL。
開啟 [命令提示字元] 視窗。
從文字編輯器將經過編輯的 curl 命令貼上到命令提示字元視窗中，然後執行該命令。

檢查回應

成功的回應會以 JSON 格式傳回，類似下列範例：

{
    "modelVersion": "2023-10-01",
    "captionResult":
    {
        "text": "a man pointing at a screen",
        "confidence": 0.7767987847328186
    },
    "metadata":
    {
        "width": 1038,
        "height": 692
    },
    "readResult":
    {
        "blocks":
        [
            {
                "lines":
                [
                    {
                        "text": "9:35 AM",
                        "boundingPolygon": [{"x":131,"y":130},{"x":214,"y":130},{"x":214,"y":148},{"x":131,"y":148}],
                        "words": [{"text":"9:35","boundingPolygon":[{"x":132,"y":130},{"x":172,"y":131},{"x":171,"y":149},{"x":131,"y":148}],"confidence":0.977},{"text":"AM","boundingPolygon":[{"x":180,"y":131},{"x":203,"y":131},{"x":202,"y":149},{"x":180,"y":149}],"confidence":0.998}]
                    },
                    {
                        "text": "Conference room 154584354",
                        "boundingPolygon": [{"x":132,"y":153},{"x":224,"y":153},{"x":224,"y":161},{"x":132,"y":160}],
                        "words": [{"text":"Conference","boundingPolygon":[{"x":143,"y":153},{"x":174,"y":154},{"x":174,"y":161},{"x":143,"y":161}],"confidence":0.693},{"text":"room","boundingPolygon":[{"x":176,"y":154},{"x":188,"y":154},{"x":188,"y":161},{"x":176,"y":161}],"confidence":0.959},{"text":"154584354","boundingPolygon":[{"x":192,"y":154},{"x":224,"y":154},{"x":223,"y":161},{"x":192,"y":161}],"confidence":0.705}]
                    },
                    {
                        "text": ": 555-123-4567",
                        "boundingPolygon": [{"x":133,"y":164},{"x":183,"y":164},{"x":183,"y":170},{"x":133,"y":170}],
                        "words": [{"text":":","boundingPolygon":[{"x":134,"y":165},{"x":137,"y":165},{"x":136,"y":171},{"x":133,"y":171}],"confidence":0.162},{"text":"555-123-4567","boundingPolygon":[{"x":143,"y":165},{"x":182,"y":165},{"x":181,"y":171},{"x":143,"y":171}],"confidence":0.653}]
                    },
                    {
                        "text": "Town Hall",
                        "boundingPolygon": [{"x":545,"y":178},{"x":588,"y":179},{"x":588,"y":190},{"x":545,"y":190}],
                        "words": [{"text":"Town","boundingPolygon":[{"x":545,"y":179},{"x":569,"y":180},{"x":569,"y":190},{"x":545,"y":190}],"confidence":0.988},{"text":"Hall","boundingPolygon":[{"x":571,"y":180},{"x":589,"y":180},{"x":589,"y":190},{"x":571,"y":190}],"confidence":0.99}]
                    },
                    {
                        "text": "9:00 AM - 10:00 AM",
                        "boundingPolygon": [{"x":545,"y":191},{"x":596,"y":191},{"x":596,"y":199},{"x":545,"y":198}],
                        "words": [{"text":"9:00","boundingPolygon":[{"x":546,"y":191},{"x":556,"y":192},{"x":556,"y":199},{"x":546,"y":199}],"confidence":0.758},{"text":"AM","boundingPolygon":[{"x":558,"y":192},{"x":565,"y":192},{"x":564,"y":199},{"x":558,"y":199}],"confidence":0.989},{"text":"-","boundingPolygon":[{"x":567,"y":192},{"x":570,"y":192},{"x":569,"y":199},{"x":567,"y":199}],"confidence":0.896},{"text":"10:00","boundingPolygon":[{"x":571,"y":192},{"x":585,"y":192},{"x":585,"y":199},{"x":571,"y":199}],"confidence":0.797},{"text":"AM","boundingPolygon":[{"x":587,"y":192},{"x":594,"y":193},{"x":593,"y":199},{"x":586,"y":199}],"confidence":0.994}]
                    },
                    {
                        "text": "Aaron Blaion",
                        "boundingPolygon": [{"x":542,"y":201},{"x":581,"y":201},{"x":581,"y":207},{"x":542,"y":207}],
                        "words": [{"text":"Aaron","boundingPolygon":[{"x":545,"y":201},{"x":560,"y":202},{"x":560,"y":208},{"x":545,"y":208}],"confidence":0.718},{"text":"Blaion","boundingPolygon":[{"x":562,"y":202},{"x":579,"y":202},{"x":579,"y":207},{"x":562,"y":207}],"confidence":0.274}]
                    },
                    {
                        "text": "Daily SCRUM",
                        "boundingPolygon": [{"x":537,"y":258},{"x":574,"y":259},{"x":574,"y":266},{"x":537,"y":265}],
                        "words": [{"text":"Daily","boundingPolygon":[{"x":538,"y":259},{"x":551,"y":259},{"x":551,"y":266},{"x":538,"y":265}],"confidence":0.404},{"text":"SCRUM","boundingPolygon":[{"x":553,"y":259},{"x":570,"y":260},{"x":570,"y":265},{"x":553,"y":266}],"confidence":0.697}]
                    },
                    {
                        "text": "10:00 AM-11:00 AM",
                        "boundingPolygon": [{"x":535,"y":266},{"x":589,"y":265},{"x":589,"y":272},{"x":535,"y":273}],
                        "words": [{"text":"10:00","boundingPolygon":[{"x":539,"y":267},{"x":553,"y":266},{"x":552,"y":273},{"x":539,"y":274}],"confidence":0.219},{"text":"AM-11:00","boundingPolygon":[{"x":554,"y":266},{"x":578,"y":266},{"x":578,"y":272},{"x":554,"y":273}],"confidence":0.175},{"text":"AM","boundingPolygon":[{"x":580,"y":266},{"x":587,"y":266},{"x":586,"y":272},{"x":580,"y":272}],"confidence":1}]
                    },
                    {
                        "text": "Charlene de Crum",
                        "boundingPolygon": [{"x":538,"y":272},{"x":588,"y":273},{"x":588,"y":279},{"x":538,"y":279}],
                        "words": [{"text":"Charlene","boundingPolygon":[{"x":538,"y":273},{"x":562,"y":273},{"x":562,"y":280},{"x":538,"y":280}],"confidence":0.322},{"text":"de","boundingPolygon":[{"x":563,"y":273},{"x":569,"y":273},{"x":569,"y":280},{"x":563,"y":280}],"confidence":0.91},{"text":"Crum","boundingPolygon":[{"x":570,"y":273},{"x":582,"y":273},{"x":583,"y":280},{"x":571,"y":280}],"confidence":0.871}]
                    },
                    {
                        "text": "Quarterly NI Handa",
                        "boundingPolygon": [{"x":537,"y":295},{"x":588,"y":295},{"x":588,"y":302},{"x":537,"y":302}],
                        "words": [{"text":"Quarterly","boundingPolygon":[{"x":539,"y":296},{"x":563,"y":296},{"x":563,"y":302},{"x":538,"y":302}],"confidence":0.603},{"text":"NI","boundingPolygon":[{"x":564,"y":296},{"x":570,"y":296},{"x":571,"y":302},{"x":564,"y":302}],"confidence":0.73},{"text":"Handa","boundingPolygon":[{"x":572,"y":296},{"x":588,"y":296},{"x":588,"y":302},{"x":572,"y":302}],"confidence":0.905}]
                    },
                    {
                        "text": "11.00 AM-12:00 PM",
                        "boundingPolygon": [{"x":538,"y":303},{"x":587,"y":303},{"x":587,"y":309},{"x":538,"y":309}],
                        "words": [{"text":"11.00","boundingPolygon":[{"x":539,"y":303},{"x":552,"y":303},{"x":553,"y":309},{"x":539,"y":310}],"confidence":0.671},{"text":"AM-12:00","boundingPolygon":[{"x":554,"y":303},{"x":578,"y":303},{"x":578,"y":309},{"x":554,"y":309}],"confidence":0.656},{"text":"PM","boundingPolygon":[{"x":579,"y":303},{"x":586,"y":303},{"x":586,"y":309},{"x":580,"y":309}],"confidence":0.454}]
                    },
                    {
                        "text": "Bobek Shemar",
                        "boundingPolygon": [{"x":538,"y":310},{"x":577,"y":310},{"x":577,"y":316},{"x":538,"y":316}],
                        "words": [{"text":"Bobek","boundingPolygon":[{"x":539,"y":310},{"x":554,"y":311},{"x":554,"y":317},{"x":539,"y":317}],"confidence":0.632},{"text":"Shemar","boundingPolygon":[{"x":556,"y":311},{"x":576,"y":311},{"x":577,"y":317},{"x":556,"y":317}],"confidence":0.219}]
                    },
                    {
                        "text": "Weekly aband up",
                        "boundingPolygon": [{"x":538,"y":332},{"x":583,"y":333},{"x":583,"y":339},{"x":538,"y":338}],
                        "words": [{"text":"Weekly","boundingPolygon":[{"x":539,"y":333},{"x":557,"y":333},{"x":557,"y":339},{"x":539,"y":339}],"confidence":0.575},{"text":"aband","boundingPolygon":[{"x":558,"y":334},{"x":573,"y":334},{"x":573,"y":339},{"x":558,"y":339}],"confidence":0.475},{"text":"up","boundingPolygon":[{"x":574,"y":334},{"x":580,"y":334},{"x":580,"y":339},{"x":574,"y":339}],"confidence":0.865}]
                    },
                    {
                        "text": "12:00 PM-1:00 PM",
                        "boundingPolygon": [{"x":538,"y":339},{"x":585,"y":339},{"x":585,"y":346},{"x":538,"y":346}],
                        "words": [{"text":"12:00","boundingPolygon":[{"x":539,"y":339},{"x":553,"y":340},{"x":553,"y":347},{"x":539,"y":346}],"confidence":0.709},{"text":"PM-1:00","boundingPolygon":[{"x":554,"y":340},{"x":575,"y":340},{"x":575,"y":346},{"x":554,"y":347}],"confidence":0.908},{"text":"PM","boundingPolygon":[{"x":576,"y":340},{"x":583,"y":340},{"x":583,"y":346},{"x":576,"y":346}],"confidence":0.998}]
                    },
                    {
                        "text": "Danielle MarchTe",
                        "boundingPolygon": [{"x":538,"y":346},{"x":583,"y":346},{"x":583,"y":352},{"x":538,"y":352}],
                        "words": [{"text":"Danielle","boundingPolygon":[{"x":539,"y":347},{"x":559,"y":347},{"x":559,"y":352},{"x":539,"y":353}],"confidence":0.196},{"text":"MarchTe","boundingPolygon":[{"x":560,"y":347},{"x":582,"y":347},{"x":582,"y":352},{"x":560,"y":352}],"confidence":0.571}]
                    },
                    {
                        "text": "Product reviret",
                        "boundingPolygon": [{"x":537,"y":370},{"x":578,"y":370},{"x":578,"y":375},{"x":537,"y":375}],
                        "words": [{"text":"Product","boundingPolygon":[{"x":539,"y":370},{"x":559,"y":370},{"x":559,"y":376},{"x":539,"y":375}],"confidence":0.7},{"text":"reviret","boundingPolygon":[{"x":560,"y":370},{"x":578,"y":371},{"x":578,"y":375},{"x":560,"y":376}],"confidence":0.218}]
                    }
                ]
            }
        ]
    }
}

下一步

在本快速入門中，您已了解如何使用 REST API 進行基本影像分析呼叫。接下來，深入了解分析 4.0 API 功能。

呼叫分析影像 4.0 API

影像分析概觀

必要條件

使用 Azure 訂用帳戶和 Azure AI 服務資源登入 Vision Studio。如果您需要此步驟的協助，請參閱概觀的開始使用一節。

分析影像

選取 [分析影像] 索引標籤，然後選取標題為 [從影像擷取一般標記] 的面板。
若要使用立即試用體驗，您需要選擇資源並確認其會根據您的定價層產生使用量。
從可用的集合中選取影像，或上傳您自己的影像。
選取影像之後，您會看到偵測到的標記以及其信賴分數出現在輸出視窗中。您也可以選取 [JSON] 索引標籤，以查看 API 呼叫傳回的 JSON 輸出。
立即試用體驗之後的後續步驟，是在您自己的應用程式中開始使用此功能。

下一步

在本快速入門中，您已使用 Vision Studio 來執行基本影像分析工作。接下來，深入了解分析影像 API 功能。

呼叫分析 4.0 API (部分機器翻譯)

影像分析概觀

共用方式為

快速入門：影像分析 4.0

必要條件

設定應用程式

安裝用戶端 SDK

安裝用戶端 SDK

建立環境變數

分析影像

輸出

清除資源

下一步

必要條件

建立環境變數

分析影像

輸出

清除資源

下一步

必要條件

設定應用程式

建立環境變數

分析影像

輸出

清除資源

下一步

必要條件

建立環境變數

分析影像

清除資源

下一步

必要條件

分析影像

檢查回應

下一步

必要條件

分析影像

下一步

意見反應

其他資源