face_detect.php

gistfile1.aw

<?php
$file_path = './sample.jpg';
$cascade = './haarcascade_frontalface_alt.xml';
$faces = face_detect( $file_path, $cascade );
if ( ! count( $faces ) ) {
  exit( '顔がない' );
}

$img = imagecreatefromjpeg( $file_path );
$line_color = imagecolorallocate( $img, 255, 0, 0 );

foreach ( $faces as $f ) {
  imagepolygon( $img, array(
      $f['x'], $f['y'],
      $f['x'] + $f['width'], $f['y'],
      $f['x'] + $f['width'], $f['y'] + $f['height'],
      $f['x'], $f['y'] + $f['height'],
    ),
    4,
    $line_color
  );
}

imagejpeg( $img, "{$file_path}.face_detect.jpg" );
imagedestroy( $img );