PHP를 사용하여 얼굴 인식 및 신원 인증 기능을 구현하는 방법

// 收集人脸样本
function collectFaceSamples($userId)
{
    $stream = file_get_contents('php://input');
    if (!is_dir('faces/' . $userId)) {
        mkdir('faces/' . $userId);
    }
    file_put_contents('faces/' . $userId . '/' . uniqid() . '.jpeg', $stream);
}

// 训练人脸识别模型
function trainModel()
{
    $pathToImages = 'faces';
    $pathToModel = 'model.xml';
    
    $images = [];
    $labels = [];
    
    $folders = scandir($pathToImages);
    foreach ($folders as $folder) {
        if ($folder != '.' && $folder != '..') {
            $files = scandir($pathToImages . '/' . $folder);
            foreach ($files as $file) {
                if ($file != '.' && $file != '..') {
                    $images[] = $pathToImages . '/' . $folder . '/' . $file;
                    $labels[] = $folder;
                }
            }
        }
    }
    
    $faceRecognizer = OpenCVcreateLBPHFaceRecognizer();
    $faceRecognizer->train($images, $labels);
    $faceRecognizer->save($pathToModel);
}

// 人脸识别和身份认证
function recognizeAndAuthenticate()
{
    $pathToModel = 'model.xml';
    
    $stream = file_get_contents('php://input');
    $tempImage = 'temp.jpeg';
    file_put_contents($tempImage, $stream);
    
    $faceRecognizer = OpenCVcreateLBPHFaceRecognizer();
    $faceRecognizer->load($pathToModel);
    
    $image = OpenCVimread($tempImage);
    $grayImage = OpenCVcvtColor($image, OpenCVCOLOR_BGR2GRAY);
    
    $label = $faceRecognizer->predict($grayImage);
    
    // 判断是否属于已知用户
    if ($label == 'userId') {
        // 身份认证通过
        echo '认证通过';
    } else {
        // 身份认证失败
        echo '认证失败';
    }
    
    unlink($tempImage);
}

// API 接口
if ($_SERVER['REQUEST_METHOD'] === 'POST') {
    if ($_GET['action'] === 'collect') {
        // 收集人脸样本
        collectFaceSamples($_GET['userId']);
    } else if ($_GET['action'] === 'train') {
        // 训练模型
        trainModel();
    } else if ($_GET['action'] === 'recognizeAndAuthenticate') {
        // 人脸识别和身份认证
        recognizeAndAuthenticate();
    }
}