小程序实现人脸识别功能(百度ai)

1. 按照文档获取AppID、API Key、Secret Key，进行Access Token（用户身份验证和授权的凭证）的生成

const getBaiduToken = function () { return new Promise((resolve, reject) => { //自行获取APIKey、SecretKey const apiKey = APIKey; const secKey = SecretKey; const tokenUrl = `https://aip.baidubce.com/oauth/2.0/token?grant_type=client_credentials&client_id=${apiKey}&client_secret=${secKey}`; wx.request({ url: tokenUrl, method: 'POST', dataType: "json", header: { 'content-type': 'application/json; charset=UTF-8' }, success: function (res) { resolve(res); }, fail: function (res) { wx.hideLoading(); wx.showToast({ title: '网络错误，请重试！', icon: 'none', duration: 2000 }) reject(res); }, complete: function (res) { resolve(res); } }) }) }

2. 选择人脸识别-->人脸检测，人脸识别接口分为V2和V3两个版本，确认在百度云后台获得的是V2还是v3版本接口权限。

//封装识别方法 const getImgIdentify = function(tokenUrl, data){ return new Promise((resolve, reject) => { const detectUrl = `https://aip.baidubce.com/rest/2.0/face/v3/detect?access_token=${tokenUrl}`; wx.request({ url: detectUrl, data: data, method: 'POST', dataType: "json", header: { 'content-type': 'Content-Type:application/json; charset=UTF-8' }, success: function (res) { resolve(res); }, fail: function (res) { wx.hideLoading(); wx.showToast({ title: '网络错误，请重试！', icon: 'none', duration: 2000 }) reject(res); }, complete: function (res) { resolve(res); } }) }) }

3. 调用识别方法

getBaiduToken().then((res) => { let token = res.data.access_token; let data = { "image": self.data.img, "image_type":"URL", "face_field":"ge,beauty,expression,face_shape,gender,glasses,landmark,race,quality,eye_status,emotion,face_type" } util.getImgIdentify(token, data).then((res)=>{ //百度接口返回的结果 let score = parseInt(res.data.result.face_list[0].beauty); self.setData({ score: score, }) }) })

4. 结果如下：