How to implement face recognition in WeChat applet

This article mainly introduces in detail the WeChat applet to implement face recognition, add information and upload photos. It has certain reference value. Interested friends can refer to this article.

I have shared with you the specific code for face recognition in the WeChat applet for your reference. The specific content is as follows

First of all, we need developer tools. What we are talking about today is achieved by combining the backend and frontend.

Write an upload method in the PHP controller, the code is as follows:

public function upload($id=''){ 
 if(empty($id)){ 
  return false; 
 } 
 
 $no = M("student")->where("id={$id}")->getField('no'); 
 $dir = "./Upload/studentface/"; 
 if(!file_exists($dir)){ 
  mkdir($dir, 0777, true); 
 } 
 $upload = new \Think\Upload();// 实例化上传类 
 $upload->maxSize = 3145728 ;// 设置附件上传大小 
 $upload->exts = array('jpg', 'gif', 'png', 'jpeg');// 设置附件上传类型 
 $upload->rootPath = $dir; // 设置附件上传根目录 
 $upload->savePath = ''; // 设置附件上传（子）目录 
 $upload->saveName = $no; 
 $upload->replace = true; 
 $upload->autoSub = false; 
 // 上传文件 
 $info = $upload->uploadOne($_FILES['file']); 
 if(!$info) {// 上传错误提示错误信息 
  // return $this->ajaxReturn(array('error'=>true,'msg'=>$upload->getError())); 
  return json_encode(array('error'=>true,'msg'=>$upload->getError()),JSON_UNESCAPED_UNICODE); 
 }else{// 上传成功 获取上传文件信息 
  // return $this->ajaxReturn(array('error'=>false,'msg'=>$info['savepath'].$info['savename'],'id'=>$id)); 
  $file = $dir . $info['savepath'] . $info['savename']; 
  $image = base64_encode(file_get_contents($file)); 
  $this->facevalid($no,$image); 
 
  $m = M('head'); 
  $data = $m->where("no='{$no}'")->find(); 
 
  if($data){ 
  //有数据，则更新 
  $m->where("no='{$no}'")->save(array('base64'=>$image, 'path'=>$file)); 
  }else{ 
  $m->add(array('no'=>$no,'base64'=>$image,'path'=>$file)); 
  } 
 
  return "采集照片成功"; 
 } 
}

public function facevalid($no,$image,$file){ 
 
 $options = array(); 
 
 $options["max_face_num"] = 2; 
 // $options["face_type"] = "LIVE"; 
 
 // $image=file_get_contents($file); 
 // $image=base64_encode($image); 
 // echo $image; 
 $imageType="BASE64"; 
  
 // 带参数调用人脸检测 
 $client=$this->init_face(); 
 $ret=$client->detect($image,$imageType,$options); 
 // $arr=$ret; 
 // print_r($ret); 
 // exit; 
 if($ret['error_code']==0){//有人脸 
  $result=$ret['result']; 
  $face_num=$result['face_num']; 
 
  if(1==$face_num){//人脸数量为1 
  $face_probability=$result['face_list'][0]['face_probability']; 
  if(1==$face_probability){//可靠性为1 
   $group=$this->face_group(); 
   
   // echo $group; 
   // exit; 
   $faces=$client->faceGetlist($no,$group); 
   if($faces['error_code']>0){ 
   $client->addUser($image,'BASE64',$group,$no); 
   }else{ 
   $client->updateUser($image,'BASE64',$group,$no); 
   } 
   // echo '人脸检测完成，并已入库'; 
   // return true; 
   // $arr = array('error'=>false,'msg'=>'上传成功'); 
   
  }else{ 
  die('图片质量'); 
   // die('图片质量仅为:'.$face_probability.',上传失败'); 
  } 
  }else{ 
  die('人脸数量大于1'); 
  // die('人脸数量大于1，失败'); 
  } 
 }else{ 
  die('没有人脸'); 
  // die('没有人脸，失败'); 
 } 
 }

In the front end we need to write js and wxml in the developer tools.

The js code is as follows:

const app = getApp() 
Page({ 
 data: { 
 sex: '女', 
 empty:true 
 }, 
 cancel: function () { 
 wx.redirectTo({ 
 url: '../face/face', 
 }) 
 }, 
 
 switch1Change: function (e) { 
 if (e.detail.value) { 
 this.setData({ sex: '男' }) 
 } else { 
 this.setData({ sex: '女' }) 
 } 
 }, 
 formSubmit: function (e) { 
 // console.log(e); 
 wx.request({ 
 url: 'http://*****.top/ppp/server/index.php/home/index/index', 
 data: e.detail.value, 
 method: 'POST', 
 header: { 
 'content-type': 'application/x-www-form-urlencoded' 
 }, 
 success: (res) => { 
 console.log(res.data); 
  
 if (res.data.error) { 
  wx.showToast({ 
  title: res.data.msg, 
  icon: 'none', 
  duration: 2000 
  }) 
 } else { 
  wx.showToast({ 
  title: res.data.msg, 
  icon: 'success', 
  duration: 2000 
  }) 
  
  setTimeout(function () { 
  wx.navigateTo({ 
  url: '../headimg/headimg?id=' + res.data.id, 
  }) 
  }, 2000) 
  
 } 
  
 } 
 
 }) 
 
 } 
  
})

The js code for uploading images is as follows ：

const app = getApp() 
function upload(that, id) { 
 if (that.data.files.length == 0) { 
 return; 
 } 
 wx.uploadFile({ 
 url: 'http://****.top/ppp/server/index.php/home/index/upload', //仅为示例，非真实的接口地址 
 filePath: that.data.files[0], 
 name: 'file', 
 formData: { 
 'id': id 
 }, 
 success: function (res) { 
 var data = res.data 
 // var json = JSON.parse(data) 
 console.log(data) 
 wx.showToast({ 
 title: data, 
 icon:'success', 
 duration:2000 
 }) 
 setTimeout(function () { 
 wx.navigateTo({ 
  url: '../index/index', 
 }) 
 }, 2000) 
 } 
 }) 
} 
Page({ 
 chooseImage: function (e) { 
 var that = this; 
 wx.chooseImage({ 
 count: 1, 
 sizeType: ['original', 'compressed'], // 可以指定是原图还是压缩图，默认二者都有 
 sourceType: ['album', 'camera'], // 可以指定来源是相册还是相机，默认二者都有 
 success: function (res) { 
 console.log(res) 
 // 返回选定照片的本地文件路径列表，tempFilePath可以作为img标签的src属性显示图片 
 that.setData({ 
  files: res.tempFilePaths, 
 }); 
 } 
 }) 
 }, 
 //预览照片 
 previewImage: function () { 
 var current = e.target.dataset.src 
 wx.previewImage({ 
 current: current, 
 urls: this.data.imageList 
 }) 
 }, 
 
 cancel:function(){ 
 wx.redirectTo({ 
 url: '../index/index', 
 }) 
 }, 
 /** 
 * 页面的初始数据 
 */ 
 data: { 
 files: [], 
 options:null, 
 id:null, 
 }, 
 formSubmit:function(e){ 
 upload(this,this.data.id); 
 }, 
 /** 
 * 生命周期函数--监听页面加载 
 */ 
 onLoad: function (options) { 
 console.log(options); 
 this.setData({options:options}) 
 this.setData({ id: options.id }) 
 }, 
 
 /** 
 * 生命周期函数--监听页面初次渲染完成 
 */ 
 onReady: function () { 
 
 }, 
 
 /** 
 * 生命周期函数--监听页面显示 
 */ 
 onShow: function () { 
 
 }, 
 
 /** 
 * 生命周期函数--监听页面隐藏 
 */ 
 onHide: function () { 
 
 }, 
 
 /** 
 * 生命周期函数--监听页面卸载 
 */ 
 onUnload: function () { 
 
 }, 
 
 /** 
 * 页面相关事件处理函数--监听用户下拉动作 
 */ 
 onPullDownRefresh: function () { 
 
 }, 
 
 /** 
 * 页面上拉触底事件的处理函数 
 */ 
 onReachBottom: function () { 
 
 }, 
 
 /** 
 * 用户点击右上角分享 
 */ 
 onShareAppMessage: function () { 
 
 } 
})

The wxml code is as follows:

<view class="weui-cells__title text">录入学生信息</view> 
<form bindsubmit="formSubmit"> 
 <view class="weui-cells weui-cells_after-title"> 
 <view class="weui-cell weui-cell_input"> 
 <view class="weui-cell__hd"> 
  <view class="weui-label">学号</view> 
 </view> 
 <view class="weui-cell__bd"> 
  <input class="weui-input" placeholder="请输入学号" value=&#39;1635050739&#39; name="no" /> 
 </view> 
 </view> 
 <view class="weui-cell weui-cell_input weui-cell_vcode"> 
 <view class="weui-cell__hd"> 
  <view class="weui-label">姓名</view> 
 </view> 
 <view class="weui-cell__bd"> 
  <input class="weui-input" placeholder="请输入姓名" value=&#39;小苏&#39; name="name" /> 
 </view> 
 </view> 
 <view class="weui-cell weui-cell_input"> 
 <view class="weui-label">性别</view> 
 <input class="weui-input" name=&#39;sex&#39; value=&#39;{{sex}}&#39;/> 
 <view class=&#39;weui-cell_ft&#39;> 
  <switch checked bindchange=&#39;switch1Change&#39;></switch> 
 </view> 
 </view> 
 <view class="weui-cell weui-cell_input weui-cell_vcode"> 
 <view class="weui-cell__hd"> 
  <view class="weui-label">年龄</view> 
 </view> 
 <view class="weui-cell__bd"> 
  <input class="weui-input" placeholder="请输入年龄" value=&#39;20&#39; name="age" /> 
 </view> 
 </view> 
 </view> 
 <view class="weui-btn-area"> 
 <button class="weui-btn" type="primary" bindtap="showTopTips" formType="submit">注册</button> 
 <button class="weui-btn" type="default" bindtap=&#39;cancel&#39;>返回上级</button> 
 </view> 
</form>

The wxml code for uploading pictures is as follows:

<view class="page" xmlns:wx="http://www.w3.org/1999/xhtml"> 
<view class="weui-cells__title text">图像采集</view> 
<view class="weui-cells__title text">{{options.name}} {{options.no}}</view> 
<form bindsubmit="formSubmit"> 
<view class="page__bd"> 
 <view class="weui-cells"> 
  <view class="weui-cell"> 
  <view class="weui-cell__bd"> 
   <view class="weui-uploader"> 
   <view class="weui-uploader__hd"> 
    <view class="weui-uploader__title">图片上传</view> 
    <view class="weui-uploader__info">{{files.length}}/1</view> 
   </view> 
   <view class="weui-uploader__bd"> 
    <view class="weui-uploader__files" id="uploaderFiles"> 
    <block wx:for="{{files}}" wx:key="*this"> 
     <view class="weui-uploader__file" bindtap="previewImage" id="{{item}}"> 
     <image class="weui-uploader__img" src="{{item}}" mode="aspectFill"/> 
     </view> 
    </block> 
    </view> 
    <view class="weui-uploader__input-box"> 
    <view class="weui-uploader__input" bindtap="chooseImage"></view> 
    </view> 
   </view> 
   </view> 
  </view> 
  </view> 
 </view> 
 </view> 
 <view class="weui-btn-area"> 
  <button class="weui-btn" type="primary" form-type="submit">确认</button> 
  <button class="weui-btn" type="default" bindtap=&#39;cancel&#39;>取消</button> 
 </view> 
 </form> 
</view>

The above is the entire content of this article. I hope it will be helpful to everyone’s study. For more related content, please pay attention to the PHP Chinese website!

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