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【全球独家】【一步步开发AI运动小程序】五、帧图像人体识别

来源：博客园


【资料图】

随着人工智能技术的不断发展，阿里体育等IT大厂，推出的“乐动力”、“天天跳绳”AI运动APP，让云上运动会、线上运动会、健身打卡、AI体育指导等概念空前火热。那么，能否将这些在APP成功应用的场景搬上小程序，分享这些概念的红利呢？本系列文章就带您一步一步从零开始开发一个AI运动小程序，本系列文章将使用“云智AI运动识别小程序插件”，请先行在微信服务市场或官网了解详情。

一、初始化人体识别功能

人体识别能力调用前需要初始化（可多次初始化），插件的具有双人体识别引擎，默认不指定引擎将自动选择最优引擎，也可指定引擎，识别引擎的差别请参考集成文档。

const that = this;humanDetection.initialize({//ve: 2,callback(err) {uni.hideLoading();if (!err) {console.log("人体检测能力初始化成功。", humanDetection.getVe());return;}uni.showModal({content: `初始化失败，详细信息：${err.message}`,showCancel: false});}});

二、调用人体识别功能

//接上篇抽帧const context = wx.createCameraContext();const listener = context.onCameraFrame((frame) => {//frame.data图像数组将用于后续的人体识别const iamge = {width: Number(frame.width),height: Number(frame.height),rawData: frame.data};humanDetection.detectionAsync(image).then(human=>{console.log(human);});});listener.start();

三、人体识别结果

{  "score": 0.7251838252824896,  "width": 480,  "height": 640,  "timestamp": 1684325583506,  "keypoints": [    {      "y": 103.56424502483996,      "x": 256.0109768927012,      "score": 0.4570312798023224,      "name": "nose"    },    {      "y": 90.71574411931093,      "x": 270.50707531981544,      "score": 0.58251953125,      "name": "left_eye"    },    {      "y": 90.09307140499885,      "x": 244.60145098668588,      "score": 0.552734375,      "name": "right_eye"    },    {      "y": 95.37442872749463,      "x": 286.88540601464354,      "score": 0.75244140625,      "name": "left_ear"    },    {      "y": 93.90985185987653,      "x": 231.85045311881774,      "score": 0.7392578125,      "name": "right_ear"    },    {      "y": 162.78484030178413,      "x": 311.0556351088547,      "score": 0.919921875,      "name": "left_shoulder"    },    {      "y": 161.2381417518693,      "x": 203.38841526521654,      "score": 0.77197265625,      "name": "right_shoulder"    },    {      "y": 240.78316880186404,      "x": 310.24842737472574,      "score": 0.84912109375,      "name": "left_elbow"    },    {      "y": 242.12329664294745,      "x": 201.77353663841666,      "score": 0.833984375,      "name": "right_elbow"    },    {      "y": 281.9979693520591,      "x": 352.673287407275,      "score": 0.59765625,      "name": "left_wrist"    },    {      "y": 286.2878520237733,      "x": 173.8384814716242,      "score": 0.63427734375,      "name": "right_wrist"    },    {      "y": 307.2371714929637,      "x": 273.4654390815558,      "score": 0.82177734375,      "name": "left_hip"    },    {      "y": 305.7596342955926,      "x": 222.0470940485152,      "score": 0.84912109375,      "name": "right_hip"    },    {      "y": 417.72422545441424,      "x": 267.0201893540119,      "score": 0.6103515625,      "name": "left_knee"    },    {      "y": 414.7774591985668,      "x": 204.46947287192143,      "score": 0.8701171875,      "name": "right_knee"    },    {      "y": 481.8868752974563,      "x": 280.1792094531294,      "score": 0.74072265625,      "name": "left_ankle"    },    {      "y": 467.38751675509405,      "x": 247.29222232381437,      "score": 0.7451171875,      "name": "right_ankle"    }  ],  "bodyRange": {    "x": 173.8384814716242,    "y": 90.09307140499885,    "width": 178.8348059356508,    "height": 391.79380389245745  }}

四、识别结果旋转矫正

获得人体识别结果后，可以调用rotate()进行整体旋转，也可以调用rotateToUpright()自动旋转直立图，进行横、竖屏适配。

下一篇将为您介绍人体骨骼图绘制...

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