手势关键点检测HandPosture的语法及示例_视觉智能开放平台(VIAPI)-阿里云帮助中心

本文介绍人脸人体（facebody）类目下的手势关键点检测HandPosture的语法及示例。

功能描述

手势关键点检测能力可以获取手势的二十一个关键点信息。

关于该接口功能的示例图如下：

说明

您可以进入在线咨询获取在线人工帮助。
当前能力可在视觉智能开放平台有完整的免费产品体验，您可以单击立即试用对该能力进行更直观试用以及在线购买。
阿里云视觉智能开放平台视觉AI能力API接入、接口使用或问题咨询等，请通过钉钉群（23109592）加入阿里云视觉智能开放平台咨询群联系我们。

接入指引

1. 注册阿里云账号：打开阿里云官网，在阿里云官网右上角，单击立即注册，按照操作提示完成账号注册。

2. 开通能力：请确保您已开通人脸人体服务，若未开通服务请立即开通。

说明本能力支持企业或个人认证用户开通。更多实名认证操作信息，请参见实名认证。

3. 创建AccessKey：请确保您已创建AccessKey，如果您使用的是子账号AccessKey，您需要给子账号赋予AliyunVIAPIFullAccess权限，具体操作，请参见RAM授权。

4. 在线调试（可选）：您可以通过OpenAPI Explorer在线调试能力，查看完整的调用示例代码及SDK依赖信息，也可以下载完整的工程。

5. 开发接入步骤：

在SDK总览中选择您要接入使用的SDK语言。
在对应语言的SDK文档中找到AI类目为人脸人体（facebody）的SDK包进行安装。
参考文档中提供的示例代码进行适当修改后调用。

6. 客户端直接调用：该能力常用的客户端调用方式包括以下几种。

输入限制

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

计费说明

手势关键点检测能力目前处于公测期，可免费调用。

调试

您可以在OpenAPI Explorer中直接运行该接口，免去您计算签名的困扰。运行成功后，OpenAPI Explorer可以自动生成SDK代码示例。

请求参数

名称	类型	是否必选	示例值	描述
Action	String	是	HandPosture	系统规定参数。取值：HandPosture。
ImageURL	String	是	http://viapi-test.oss-cn-shanghai.aliyuncs.com/viapi-3.0domepic/facebody/HandPosture/HandPosture3.jpg	图像URL地址。推荐使用上海地域的OSS链接，对于文件在本地或者非上海地域OSS链接的情况，请参见文件URL处理。

返回数据

名称	类型	示例值	描述
RequestId	String	99CE0601-FA61-4A41-BBF0-72D3E1FF5139	请求ID。
Data	Object		返回的结果数据内容。
Outputs	Array of Output		手势检测结果。
HandCount	Integer	1	手掌的个数。
Results	Array of Result		手势类别。
Hands	Object		手势关键点信息。
KeyPoints	Array of KeyPoint		关键点坐标，是相对坐标，即相对于图像尺寸的坐标。
Positions	Array of Position		相对于图像尺寸的关键点坐标。
Points	Array of Float	[0.5656, 0.4567]	关键点的坐标，x和y的取值范围为0~1。相对于图像宽度width和图像高度height的相对坐标，实际坐标为`xwidth`和`yheight`。
Label	String	thumb	关键点的标签。
Confident	Float	0.555	置信度。
Box	Object		手势的检测框信息。
Positions	Array of Position		手的检测框信息。格式为 `[左上, 右上, 右下, 左下]` 。
Points	Array of Float	[0.5656, 0.4567]	手体检测框的坐标，x和y的取值范围为0~1。相对于图像宽度width和图像高度height的相对坐标，实际坐标为`xwidth`和`yheight`。
Confident	Float	0.555	手势检测框的置信度。
MetaObject	Object		图像基本信息。
Width	Integer	500	图像宽度，单位像素。
Height	Integer	600	图像高度，单位像素。

SDK参考

阿里云视觉AI人脸人体类目下的手势关键点检测能力推荐使用SDK调用，支持多种编程语言，调用时请选择AI类目为人脸人体（facebody）的SDK包，文件参数通过SDK调用可支持本地文件及任意URL，具体可参见SDK总览。

示例

请求示例

http(s)://facebody.cn-shanghai.aliyuncs.com/?Action=HandPosture   //更多关于访问域名（Endpoint）信息，请参见：https://help.aliyun.com/document_detail/143103.html
&ImageURL=http://viapi-test.oss-cn-shanghai.aliyuncs.com/viapi-3.0domepic/facebody/HandPosture/HandPosture3.jpg
&<公共请求参数>

正常返回示例

XML格式

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JSON格式

HTTP/1.1 200 OK
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}

错误码

关于手势关键点检测的错误码，详情请参见常见错误码。

开源模型体验

更多开源免费模型体验及下载，详见魔搭社区：全身关键点检测-通用领域-2D和YOLOX-PAI手部检测模型。

安全声明

请确保上传的图片或文件来源符合相应的法律法规。
通过体验调试上传的临时文件有效期为1小时，在24小时后会被系统自动清理删除。