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微信小程序实现人脸识别,具体应用场景 前端实现人脸信息采集 拍到正面照片 发送给后端
该方法暂时只针对微信小程序
前端具体效果展示 如下:
我们分开来分开解释这个方法哈
首先要新写一个页面用来跳转,具体页面的布局可以自由发挥 根据实际要求来 ,
主要运用了 wx.initFaceDetect(Object object) 具体想了解更多可以去查看官方文档哈,链接放在下面了 wx.initFaceDetect(Object object) | Weixin public doc
在项目里进入页面初始化人脸识别 可以识别到是否拍摄的是人脸 检测五官哈
具体实现方法 下面就直接贴代码了
代码语法语句都放在了代码注释中
html部分:
- template>
- <view class="page-content">
- <view class="containerV">
- <view class="headerV">
- <view class="top-tips1">
- <view>请将正对手机,头部匹配摄像区域</view>
- </view>
- <view class="top-tips2">
- 为了便于识别认证,请拍摄本人头像
- </view>
- </view>
- <view class="contentV">
- <view class="mark"></view>
- <image v-if="tempImg" mode="widthFix" :src="tempImg" />
- <camera v-if='isAuthCamera' :device-position="devicePosition ?'front': 'back'" class="camera"
- flash="off" resolution='high' />
- <view v-show="!tempImg && tipsText" class="tipV">{{ tipsText }}</view>
- </view>
- <view class="footerV">
- <view style="width: 100%;">
- <view v-if="!tempImg" style="width: 100%;">
- <view class="privacyV">
- <view class="icon"></view>
- <view class="text">
- 照片隐私<text @click="handleJumpSecurityClick">安全保障</text>中…
- </view>
- </view>
- <view class="bottom-tips-2">该照片仅作为你认证的凭证</view>
- <view class="take-photo-bgV">
- <!-- 图片上传 -->
- <view v-show="true" class="btn-change-upload" @click="handleChooseImage" ></view>
- <!--拍照-->
- <view class="btn-take-photo" @click="handleTakePhotoClick" ></view>
- <!-- 切换镜头 -->
- <view class="btn-change-camera" @click="handleChangeCameraClick" ></view>
- </view>
- </view>
- <view class="confirmV" v-else>
- <view class="btn-cancel" @click="handleCancelClick">
- 取消
- </view>
- <view class="btn-ok" @click="handleOkClick">
- 确定
- </view>
- </view>
- </view>
- </view>
- </view>
- </view>
- </template>
下面是js部分 按钮都暂时用背景颜色来填充 自己更换所需要的图片哈
- <style lang="scss" scoped>
- .page-content {
- width: 100%;
- height: 100%;
- .containerV {
- width: 100%;
- height: 100%;
- .headerV {
- .top-tips1 {
- margin-top: 60rpx;
- color: #1C1C1C;
- font-size: 36rpx;
- text-align: center;
- }
- .top-tips2 {
- margin-top: 20rpx;
- color: #00AAFF;
- font-size: 28rpx;
- text-align: center;
- }
- }
- .contentV {
- position: relative;
- display: flex;
- flex-direction: column;
- align-items: center;
- justify-content: center;
- height: 661rpx;
- margin-top: 30rpx;
- .tipV {
- bottom: 30rpx;
- position: absolute;
- line-height: 90rpx;
- padding-left: 24rpx;
- padding-right: 24rpx;
- max-width: calc(100vw - 50rpx * 2);
- text-align: center;
- font-size: 30rpx;
- background: #000000;
- opacity: 0.75;
- color: #FFFFFF;
- border-radius: 16rpx;
- overflow: hidden;
- white-space: nowrap;
- text-overflow: ellipsis;
- z-index: 5;
- }
- .camera {
- width: 400upx;
- height: 400upx;
- border-radius: 50%;
- }
- .mark {
- position: absolute;
- left: 0;
- top: 0;
- z-index: 2;
- width: 750rpx;
- height: 100%;
- // background:deeppink;
- background-size: 750rpx 661rpx;
- }
- image {
- position: absolute;
- width: 100%;
- height: 100%;
- z-index: 3;
- }
- }
-
- .footerV {
- width: 100%;
- display: flex;
- flex-direction: row;
- align-items: center;
- justify-content: center;
- .privacyV {
- padding-top: 30rpx;
- display: flex;
- flex-direction: row;
- align-items: center;
- justify-content: center;
- .text {
- font-size: 30rpx;
- color: #1C1C1C;
- text-align: center;
- line-height: 42rpx;
- margin-left: 15rpx;
- text {
- font-size: 30rpx;
- color: #00AAFF;
- text-align: center;
- line-height: 42rpx;
- }
- }
- .icon {
- width: 40rpx;
- height: 47rpx;
- background:green;
- background-size: 100% auto;
- }
- }
-
- .bottom-tips-2 {
- margin-top: 20rpx;
- color: #999999;
- text-align: center;
- font-size: 26rpx;
- }
- .take-photo-bgV {
- width: 100%;
- margin-top: 30rpx;
- display: flex;
- flex-direction: row;
- align-items: center;
- justify-content: center;
- .btn-take-photo {
- margin: 0rpx 80rpx 0rpx 80rpx;
- width: 196rpx;
- height: 196rpx;
- background: yellow;
- background-size: 100% auto;
- }
- .btn-change-upload {
- left: 130rpx;
- width: 80rpx;
- height: 80rpx;
- background: blue;
- background-size: 100% auto;
- }
- .btn-change-camera {
- right: 130rpx;
- width: 80rpx;
- height: 80rpx;
- background:red;
- background-size: 100% auto;
- }
- }
- .confirmV {
- margin: 200rpx 100rpx 0rpx 100rpx;
- display: flex;
- flex-direction: row;
- align-items: center;
- justify-content: space-between;
- .btn-cancel {
- font-size: 32rpx;
- color: #1C1C1C;
- }
- .btn-ok {
- font-size: 32rpx;
- color: #00AAFF;
- }
- }
- }
- }
- }
- </style>
js部分,一定要注意 上传图片接收到的路径和拍照接受到的路径
- <script>
- export default {
- name: 'index',
- components: {
- },
- data() {
- return {
- tipsText: '', // 错误文案提示
- tempImg: '', // 本地图片路径
- BASE_API,
- cameraEngine: null, // 相机引擎
- devicePosition: false, // 摄像头朝向
- isAuthCamera: true, // 是否拥有相机权限
- }
- },
-
- onLoad(options) {
- this.initData()
- },
- mounted(){
- },
- methods: {
- // 初始化相机引擎
- initData() {
- // #ifdef MP-WEIXIN
- // 1、初始化人脸识别
- wx.initFaceDetect()
- // 2、创建 camera 上下文 CameraContext 对象
- this.cameraEngine = wx.createCameraContext()
- // 3、获取 Camera 实时帧数据
- const listener = this.cameraEngine.onCameraFrame((frame) => {
- if (this.tempImg) {
- return;
- }
- // 4、人脸识别,使用前需要通过 wx.initFaceDetect 进行一次初始化,推荐使用相机接口返回的帧数据
- wx.faceDetect({
- frameBuffer: frame.data,
- width: frame.width,
- height: frame.height,
- enablePoint: true,
- enableConf: true,
- enableAngle: true,
- enableMultiFace: true,
- success: (faceData) => {
- let face = faceData.faceInfo[0]
- if (faceData.x == -1 || faceData.y == -1) {
- this.tipsText = '检测不到人'
- }
- if (faceData.faceInfo.length > 1) {
- this.tipsText = '请保证只有一个人'
- } else {
- const {
- pitch,
- roll,
- yaw
- } = face.angleArray;
- const standard = 0.5
- if (Math.abs(pitch) >= standard || Math.abs(roll) >= standard ||
- Math.abs(yaw) >= standard) {
- this.tipsText = '请平视摄像头'
- } else if (face.confArray.global <= 0.8 || face.confArray.leftEye <=
- 0.8 || face.confArray.mouth <= 0.8 || face.confArray.nose <= 0.8 ||
- face.confArray.rightEye <= 0.8) {
- this.tipsText = '请勿遮挡五官'
- } else {
- this.tipsText = '请拍照'
- // 这里可以写自己的逻辑了
- }
- }
- },
- fail: (err) => {
- if (err.x == -1 || err.y == -1) {
- this.tipsText = '检测不到人'
- } else {
- this.tipsText = err.errMsg || '网络错误,请退出页面重试'
- }
- },
- })
- })
- // 5、开始监听帧数据
- listener.start()
- // #endif
- },
- // 切换设备镜头
- handleChangeCameraClick() {
- this.devicePosition = !this.devicePosition;
- },
- // 图片上传
- handleChooseImage() {
- uni.chooseImage({
- count: 1,
- sizeType: ['original', 'compressed'],
- sourceType: ['album','camera'],
- success: (res) => {
- console.log(res,'打印res,哈哈哈哈哈')
- if (res.errMsg === 'chooseImage:ok') {
- uni.showLoading({
- title: '照片上传中...'
- })
- const tempFilePaths = res.tempFilePaths[0]
- this.upLoad(res.tempFilePaths);
- }
- },
- fail: (res) => {
- },
- });
- },
- // 拍照点击
- handleTakePhotoClick() {
- if (this.tipsText != "" && this.tipsText != "请拍照") {
- return;
- }
- uni.getSetting({
- success: (res) => {
- if (!res.authSetting['scope.camera']) {
- this.isAuthCamera = false
- uni.openSetting({
- success: (res) => {
- if (res.authSetting['scope.camera']) {
- this.isAuthCamera = true;
- }
- }
- })
- }
- }
- })
- this.cameraEngine.takePhoto({
- quality: "high",
- success: ({
- tempImagePath
- }) => {
- this.tempImg = tempImagePath
- }
- })
- },
- // 点击确定上传
- handleOkClick() {
- // 这里的 this.tempImg 是经过人脸检测后 拍照拿到的路径
- this.upLoadOne(this.tempImg)
- uni.navigateBack({
- delta: 1
- });
- },
- upLoad(tempFilePaths) {
- // # 注意 这里上传图片拿到的tempFilePaths是一个数组啊
- // 图片上传
- uni.showLoading({
- title: "上传中,请稍后...",
- });
- let proAll = [];
- tempFilePaths.forEach((item) => {
- console.log(item,'打印item')
- proAll.push(this.upLoadOne(item));
- });
- Promise.all(proAll).then((res) => {
- // 上传完成
- uni.hideLoading();
- });
- },
- upLoadOne(imgPath) {
- // 然后这里imgPath 传过来的是 要上传的临时本地图片的路径
- // 具体上传方法根据自己的请求方式 请求自己的接口
- },
- // 点击 - 取消上传
- handleCancelClick() {
- this.tempImg = ''
- },
- // 点击 - 人脸安全保障按钮
- handleJumpSecurityClick() {
- uni.showToast({
- icon: "none",
- title: "假装跳转人脸安全保障",
- duration: 2000,
- })
- },
-
- }
- }
- </script>
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