基于OpenCV的PHP图像人脸识别技术

安装测试了一下，如果越是高清的大图，效果越明显，感觉不错

一 安装
1 安装opencv http://sourceforge.net/project/showfiles.php?group_id=22870&package_id=16948 下载opencv-1.1pre1.tar.gz（1.0版本没有安装成功）
#tar zxvf opencv-1.1pre1.tar.gz
# cd opencv-1.1.0/
# /.configure
#make
#make install

2 安装facedetect
#wget http://www.xarg.org/download/facedetect-1.0.0.tar.gz #tar xzvf facedetect-1.0.0.tar.gz
#cd facedetect-1.0.0
#/usr/local/php/bin/phpize
#./configure –with-php-config=/usr/local/php/bin/php-config
#make
#make install

#vi /usr/local/php/etc/php.ini
// 增加extension=facedetect.so

3 重启web服务器，在phpinfo()里查看是否有facedetect这个模块

二 简单测试
从openCV源代码/data/haarcascades/里头取出所有xml文件放在php的执行目录下

//检查有多少个脸型
var_dump(face_count(’test.jpg’, ‘haarcascade_frontalface_alt.xml’));

//返回脸型在图片中的位置参数，多个则返回数组
$arr = face_detect(’test.jpg’, ‘haarcascade_frontalface_alt2.xml’);

print_r($arr);

三 测试代码
<?
if(empty($_POST)) {
?>
<form name=”form” id=”form” method=”POST” enctype=”multipart/form-data” action=”">
上传图片：<input type=”file” name=”pic” size=”20″><input type=”submit” name=”submit” value=”上传”>
</form>
<?
} else {
$img = $_FILES['pic']['tmp_name'];

$arr = face_detect($img, ‘haarcascade_frontalface_alt2.xml’);

if(is_array($arr1)) {
$all = array_merge($arr,$arr1);
} else {
$all = $arr;
}
$allowtype = 1;
switch($_FILES['pic']['type']){
case ‘image/pjpeg’: $fix_pic.= “.jpg”; break;
case ‘image/jpeg’: $fix_pic.= “.jpg”; break;
case ‘image/x-png’: $fix_pic.= “.png”; break;
case ‘image/png’: $fix_pic.= “.png”; break;
default: $allowtype = 0; break;
}

if($allowtype == 0) {
echo “文件格式错误：只运行jpg或png图片”;exit;
}

$tmp_name = time();
$src_pic = “/usr/website/nginx/face/haarcascades/upload/”.$tmp_name.$fix_pic;
move_uploaded_file($_FILES['pic']['tmp_name'], $src_pic);

$pic_src = $pic_dst = array();
if(is_array($all)){
foreach ($all as $k => $v){
$tmp_name_new = $tmp_name.”_”.$k;
$x = $v['x'];
$y = $v['y'];
$w = $v['w'];
$h = $v['h'];
$dst_pic = “/usr/website/nginx/face/haarcascades/upload/”.$tmp_name_new.$fix_pic;
// echo $src_pic.”<br>”;
// echo $dst_pic.”<br>”;
$cmd = “/usr/bin/convert -crop “.$w.”x”.$h.”+”.$x.”+”.$y.” “.$src_pic.” “.$dst_pic;
// echo $cmd.”<br>”;
echo `$cmd`;
$pic_src[] = “upload/”.$tmp_name.$fix_pic;
$pic_dst[] = “upload/”.$tmp_name_new.$fix_pic;
}
}

foreach($pic_src as $key => $value) {
echo “<img src=’”.$value.”‘> => <img src=’”.$pic_dst[$key].”‘><br>”;
}
}
?>