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本文介紹人臉人體（facebody）類目下的手勢關鍵點檢測HandPosture的語法及示例。

功能描述

手勢關鍵點檢測能力可以獲取手勢的二十一個關鍵點信息。

關于該接口功能的示例圖如下：

說明

您可以進入在線咨詢獲取在線人工幫助。
當前能力可在視覺智能開放平臺有完整的免費產品體驗，您可以單擊立即試用對該能力進行更直觀試用以及在線購買。
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接入指引

1. 注冊阿里云賬號：打開阿里云官網，在阿里云官網右上角，單擊立即注冊，按照操作提示完成賬號注冊。

2. 開通能力：請確保您已開通人臉人體服務，若未開通服務請立即開通。

說明本能力支持企業或個人認證用戶開通。更多實名認證操作信息，請參見實名認證。

3. 創建AccessKey：請確保您已創建AccessKey，如果您使用的是子賬號AccessKey，您需要給子賬號賦予AliyunVIAPIFullAccess權限，具體操作，請參見RAM授權。

4. 在線調試（可選）：您可以通過OpenAPI Explorer在線調試能力，查看完整的調用示例代碼及SDK依賴信息，也可以下載完整的工程。

5. 開發接入步驟：

在SDK總覽中選擇您要接入使用的SDK語言。
在對應語言的SDK文檔中找到AI類目為人臉人體（facebody）的SDK包進行安裝。
參考文檔中提供的示例代碼進行適當修改后調用。

6. 客戶端直接調用：該能力常用的客戶端調用方式包括以下幾種。

輸入限制

圖像格式：JPEG、JPG、BMP、PNG。
圖像大小：不超過4 MB。
URL地址中不能包含中文字符。

計費說明

手勢關鍵點檢測能力目前處于公測期，可免費調用。

調試

您可以在OpenAPI Explorer中直接運行該接口，免去您計算簽名的困擾。運行成功后，OpenAPI Explorer可以自動生成SDK代碼示例。

請求參數

名稱	類型	是否必選	示例值	描述
Action	String	是	HandPosture	系統規定參數。取值：HandPosture。
ImageURL	String	是	http://viapi-test.oss-cn-shanghai.aliyuncs.com/viapi-3.0domepic/facebody/HandPosture/HandPosture3.jpg	圖像URL地址。推薦使用上海地域的OSS鏈接，對于文件在本地或者非上海地域OSS鏈接的情況，請參見文件URL處理。

返回數據

名稱	類型	示例值	描述
RequestId	String	99CE0601-FA61-4A41-BBF0-72D3E1FF5139	請求ID。
Data	Object		返回的結果數據內容。
Outputs	Array of Output		手勢檢測結果。
HandCount	Integer	1	手掌的個數。
Results	Array of Result		手勢類別。
Hands	Object		手勢關鍵點信息。
KeyPoints	Array of KeyPoint		關鍵點坐標，是相對坐標，即相對于圖像尺寸的坐標。
Positions	Array of Position		相對于圖像尺寸的關鍵點坐標。
Points	Array of Float	[0.5656, 0.4567]	關鍵點的坐標，x和y的取值范圍為0~1。相對于圖像寬度width和圖像高度height的相對坐標，實際坐標為`xwidth`和`yheight`。
Label	String	thumb	關鍵點的標簽。
Confident	Float	0.555	置信度。
Box	Object		手勢的檢測框信息。
Positions	Array of Position		手的檢測框信息。格式為 `[左上, 右上, 右下, 左下]` 。
Points	Array of Float	[0.5656, 0.4567]	手體檢測框的坐標，x和y的取值范圍為0~1。相對于圖像寬度width和圖像高度height的相對坐標，實際坐標為`xwidth`和`yheight`。
Confident	Float	0.555	手勢檢測框的置信度。
MetaObject	Object		圖像基本信息。
Width	Integer	500	圖像寬度，單位像素。
Height	Integer	600	圖像高度，單位像素。

SDK參考

阿里云視覺AI人臉人體類目下的手勢關鍵點檢測能力推薦使用SDK調用，支持多種編程語言，調用時請選擇AI類目為人臉人體（facebody）的SDK包，文件參數通過SDK調用可支持本地文件及任意URL，具體可參見SDK總覽。

示例

請求示例

http(s)://facebody.cn-shanghai.aliyuncs.com/?Action=HandPosture   //更多關于訪問域名（Endpoint）信息，請參見：http://m.bestwisewords.com/document_detail/143103.html
&ImageURL=http://viapi-test.oss-cn-shanghai.aliyuncs.com/viapi-3.0domepic/facebody/HandPosture/HandPosture3.jpg
&<公共請求參數>

正常返回示例

XML格式

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JSON格式

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錯誤碼

關于手勢關鍵點檢測的錯誤碼，詳情請參見常見錯誤碼。

開源模型體驗

更多開源免費模型體驗及下載，詳見魔搭社區：全身關鍵點檢測-通用領域-2D和YOLOX-PAI手部檢測模型。

安全聲明

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