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>