1. 注册登入百度开发者账号。
    百度智能云

注册登录成功后,进入控制台,在左边的导航栏找到产品-》人工智能-》人脸识别(如下图):20190801165127.png

创建应用,创建应用成功后拿到应用的API Key和Secret Key。
2.接口调用-获取access token,调用人脸识别接口前需要获取access token,示例代码:

/**
 * @param $url
 * @param $param
 * @return array
 */
function execCurl($url, $param)
{
    if (empty($url) || empty($param)) {
        return array('result' => false, 'err_msg' => 'url or param is null');
    }
    $curl = curl_init();//初始化curl
    curl_setopt($curl, CURLOPT_URL, $url);//抓取指定网页
    curl_setopt($curl, CURLOPT_HEADER, 0);//设置header
    curl_setopt($curl, CURLOPT_RETURNTRANSFER, 1);//要求结果为字符串且输出到屏幕上
    curl_setopt($curl, CURLOPT_POST, 1);//post提交方式
    curl_setopt($curl, CURLOPT_POSTFIELDS, $param);
    curl_setopt($curl, CURLOPT_SSL_VERIFYPEER, 0);
    curl_setopt($curl, CURLOPT_SSL_VERIFYHOST, 0);
    $data = curl_exec($curl);//运行curl
    $curl_err_msg = curl_error($curl);
    curl_close($curl);
    if ($data === false) {
        return array('result' => false, 'err_msg' => $curl_err_msg);
    } else {
        return array('result' => true, 'data' => $data);
    }
}

$url = 'https://aip.baidubce.com/oauth/2.0/token';
$param = array(
    'grant_type' => 'client_credentials',
    'client_id' => 'xxxxxxxx',//你的API Key
    'client_secret' => 'xxxx'//你的Secret Key
);
$result = execCurl($url, $param);
$access_token = json_decode($result['data'], true)['access_token'];

3.调用人脸检查接口
如果需要判断一张图片中的人脸,是否符合后续识别或者对比的条件,在请求时在face_field参数中请求quality。
下面示例是请求图文为base64转码字符串(转码不能包含头信息),也可以传图片网络地址,官方文档:https://ai.baidu.com/docs#/Face-Detect-V3/top
示例代码:

/**
 * @param $image_path
 * @param $access_token
 * @return array
 */
function checkPictureToCheckFace($image_path, $access_token)
{
    $url = 'https://aip.baidubce.com/rest/2.0/face/v3/detect?access_token=' . $access_token;
    $param = array(
        'image' => base64EncodeImage($image_path),
        'image_type' => 'BASE64',
        'face_field' => 'quality'
    );
    $param = json_encode($param);
    $result = execCurl($url, $param);
    if ($result['result'] == false) return $result;
    $data = json_decode($result['data'], true);
    if ($data['error_code'] != 0) return array('result' => false, 'err_msg' => '上传的人脸不符合要求,请重新上传五官清晰的真实头像');
    $err_result = array('result' => false, 'err_msg' => '上传的人脸不符合要求,请重新上传五官清晰的真实头像!');
    $quality = $data['result']['face_list'][0]['quality'];
    if ($quality['occlusion']['left_eye'] > 0.6) return $err_result; // 左眼被遮挡的阈值
    if ($quality['occlusion']['right_eye'] > 0.6) return $err_result; // 右眼被遮挡的阈值
    if ($quality['occlusion']['nose'] > 0.7) return $err_result; // 鼻子被遮挡的阈值
    if ($quality['occlusion']['mouth'] > 0.7) return $err_result; // 嘴巴被遮挡的阈值
    if ($quality['occlusion']['left_cheek'] > 0.8) return $err_result; // 左脸颊被遮挡的阈值
    if ($quality['occlusion']['right_cheek'] > 0.8) return $err_result; // 右脸颊被遮挡的阈值
    if ($quality['occlusion']['chin_contour'] > 0.6) return $err_result; // 下巴被遮挡阈值
    if ($quality['blur'] != 0 && $quality['blur'] > 0.7) return $err_result; // 模糊度范围 0是最清晰,1是最模糊
    if ($quality['illumination'] < 40) return $err_result; // 光照范围
    if ($quality['completeness'] == 0) return $err_result; // 人脸完整度 0为人脸溢出图像边界,1为人脸都在图像边界内
    return array('result' => true);
}

/**
 * @param $image_path
 * @return string
 */
function base64EncodeImage($image_path)
{
    $image_data = fread(fopen($image_path, 'r'), filesize($image_path));
    $base64_image = chunk_split(base64_encode($image_data));
    return $base64_image;
}



$image_path = 'image/1.png';
$result = checkPictureToCheckFace($image_path, $access_token);//上一步的获取access token
header("Content-type:text/html;charset=utf-8;");
echo "<pre>";
var_dump($result);
die;
  1. 判断是否符合人脸识别检查的字段说明:
    2.png

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Last modification:August 1st, 2019 at 05:24 pm
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