<?php
error_reporting(E_ALL);
set_time_limit(0);
define('ABSPATH', dirname(dirname(__FILE__)));
global $error, $origImageHtml, $numFeatures, $detectedImagesHtml, $haarcascade_frontalface_alt;
require(ABSPATH.'/cascades/haarcascade_frontalface_alt.php');
require(ABSPATH.'/src/HaarDetector.php');
/* ------------------------------------------------
| UPLOAD FORM - validate form and handle submission
-------------------------------------------------- */
$error = false;
$origImageHtml = '';
$detectedImagesHtml = array();
$numFeatures = 0;
$uploadedImage = false;
if (isset($_POST['upload_form_submitted']))
{
if (! isset($_FILES['img_upload']) || empty($_FILES['img_upload']['name']))
{
$error = "<strong>Error:</strong> You didn't upload a file";
}
else
{
$allowedExtensions = array('jpg', 'jpeg', 'gif', 'png');
preg_match('/\\.(' . implode('|', $allowedExtensions) . ')$/i', $_FILES['img_upload']['name'], $fileExt);
if (! in_array(strtolower(substr($fileExt[0], 1)), $allowedExtensions))
{
$error = '<strong>Error:</strong> Invalid file format - please upload a picture (.jpg, .jpeg, .gif, .png) file';
}
$uploadedImage = $_FILES['img_upload']['tmp_name'];
}
}
if ($uploadedImage && !$error)
{
// read image
switch(strtolower($fileExt[1]))
{
case 'jpg': case 'jpeg':
$origImage = imagecreatefromjpeg($uploadedImage);
break;
case 'gif':
$origImage = imagecreatefromgif($uploadedImage);
break;
case 'png':
$origImage = imagecreatefrompng($uploadedImage);
break;
}
// detect face/feature
$faceDetector = new HaarDetector($haarcascade_frontalface_alt);
// cannyPruning sometimes depends on the image scaling, small image scaling seems to make canny pruning fail (if doCannyPruning is true)
// optionally different canny thresholds can be set to overcome this limitation
$found = $faceDetector
/* normalise image to some standard dimensions eg. 150 px width so that detection parameters below remain relatively standard as well */
->image($origImage, 150 / imagesx($origImage))
->cannyThreshold(array('low'=>80, 'high'=>200))
->detect(1, 1.1 /*1.25*/, 0.12 /*0.2*/, 1, 0.2, false)
;
// if detected
if ($found)
{
$numFeatures = count($faceDetector->objects);
// create feature images from original image
$detectedImages = array_map(function($feature) use($origImage) {
$detectedImage = imagecreatetruecolor($feature->width, $feature->height);
imagecopy($detectedImage, $origImage, 0, 0, $feature->x, $feature->y, $feature->width, $feature->height);
return $detectedImage;
}, $faceDetector->objects);
// display images
switch(strtolower($fileExt[1]))
{
case 'jpg': case 'jpeg':
ob_start();
imagejpeg($origImage);
$origImageHtml='<img src="data:image/jpeg;base64,' . base64_encode(ob_get_clean()) . '" />';
$detectedImagesHtml = array_map(function($detectedImage){
ob_start();
imagejpeg($detectedImage);
return '<img src="data:image/jpeg;base64,' . base64_encode(ob_get_clean()) . '" />';
}, $detectedImages);
break;
case 'gif':
ob_start();
imagegif($origImage);
$origImageHtml='<img src="data:image/gif;base64,' . base64_encode(ob_get_clean()) . '" />';
$detectedImagesHtml = array_map(function($detectedImage){
ob_start();
imagegif($detectedImage);
return '<img src="data:image/gif;base64,' . base64_encode(ob_get_clean()) . '" />';
}, $detectedImages);
break;
case 'png':
ob_start();
imagepng($origImage);
$origImageHtml='<img src="data:image/png;base64,' . base64_encode(ob_get_clean()) . '" />';
$detectedImagesHtml = array_map(function($detectedImage){
ob_start();
imagepng($detectedImage);
return '<img src="data:image/png;base64,' . base64_encode(ob_get_clean()) . '" />';
}, $detectedImages);
break;
}
}
else
{
$error .= "<br /><strong>Nothing Found!</strong>";
// display image
switch($fileExt[1])
{
case 'jpg': case 'jpeg':
ob_start();
imagejpeg($origImage);
$origImageHtml = '<img src="data:image/jpeg;base64,' . base64_encode(ob_get_clean()) . '" />';
break;
case 'gif':
ob_start();
imagegif($origImage);
$origImageHtml = '<img src="data:image/gif;base64,' . base64_encode(ob_get_clean()) . '" />';
break;
case 'png':
ob_start();
imagepng($origImage);
$origImageHtml = '<img src="data:image/png;base64,' . base64_encode(ob_get_clean()) . '" />';
break;
}
}
}
|
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