PHP与小程序的人脸识别与图像识别技术

<?php
// 打开原始图片
$sourceImage = imagecreatefromjpeg('path/to/source/image.jpg');

// 裁剪图片，只保留人脸区域
$faceImage = imagecrop($sourceImage, ['x' => 100, 'y' => 100, 'width' => 200, 'height' => 200]);

// 保存人脸图片
imagejpeg($faceImage, 'path/to/face/image.jpg');

// 销毁图片资源
imagedestroy($sourceImage);
imagedestroy($faceImage);
?>

<?php
// 调用百度人脸识别API
$apiKey = 'your_api_key';
$secretKey = 'your_secret_key';
$image = file_get_contents('path/to/face/image.jpg');

$url = 'https://aip.baidubce.com/rest/2.0/face/v3/detect';
$data = array(
    'image' => base64_encode($image),
    'image_type' => 'BASE64',
    'face_field' => 'age,beauty,expression',
    'max_face_num' => 1
);
$headers = array(
    'Content-Type: application/x-www-form-urlencoded'
);

$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, $url . '?access_token=' . $accessToken);
curl_setopt($ch, CURLOPT_POST, true);
curl_setopt($ch, CURLOPT_POSTFIELDS, http_build_query($data));
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_HTTPHEADER, $headers);

$result = curl_exec($ch);

// 处理人脸识别结果
$result = json_decode($result, true);
if ($result['error_code'] == 0 && $result['result']['face_num'] > 0) {
    $faceInfo = $result['result']['face_list'][0];
    $age = $faceInfo['age'];
    $beauty = $faceInfo['beauty'];
    $expression = $faceInfo['expression']['type'];
}
?>

// 调用小程序图像识别API
var AppID = 'your_app_id';
var AppSecret = 'your_app_secret';
var image = 'path/to/image.jpg';

wx.request({
  url: 'https://api.weixin.qq.com/cv/img/v1/ocr?access_token=' + accessToken,
  method: 'POST',
  data: {
    appid: AppID,
    secret: AppSecret,
    media: {
      contentType: 'image/png',
      value: wx.getFileSystemManager().readFileSync(image, 'base64')
    }
  },
  success: function(res) {
    // 处理图像识别结果
    var result = res.data;
    // ...
  }
});