<?php

$imagePath = "profile.png";
$captcha = imagecreatefrompng("$imagePath");
$height = imagesy($captcha);
$width = imagesx($captcha);
$threshold = 128;
for($x=0;$x<$width;$x++)
{
	for($y=0;$y<$height;$y++)
	{	
		$pixelValue =  imagecolorat($captcha,$x,$y);
		if($pixelValue > $threshold)
		{
			imagesetpixel($captcha,$x,$y,255);
		}
		else
		{
			imagesetpixel($captcha,$x,$y,0);
			$blackPixels[] = array($x,$y);
		}
	}
}
foreach($blackPixels as $blackPixel)
{
	imagesetpixel($captcha,$blackPixel[0]+1,$blackPixel[1]+1,0);
	imagesetpixel($captcha,$blackPixel[0],$blackPixel[1]+1,0);
	imagesetpixel($captcha,$blackPixel[0],$blackPixel[1]-1,0);
	imagesetpixel($captcha,$blackPixel[0]+1,$blackPixel[1],0);
	imagesetpixel($captcha,$blackPixel[0]-1,$blackPixel[1],0);
	imagesetpixel($captcha,$blackPixel[0]+1,$blackPixel[1]-1,0);
	imagesetpixel($captcha,$blackPixel[0]-1,$blackPixel[1]+1,0);
	imagesetpixel($captcha,$blackPixel[0]-1,$blackPixel[1]+1,0);
}


$startedCharacter = False;
$highestY = 10000;
$lowestY = 0;
$count = 0;
for($x=0;$x<$width;$x++)
{
	$hasBlack = False;
	for($y=0;$y<$height;$y++)
	{
		if(imagecolorat($captcha,$x,$y) == 0)
		{
			$hasBlack = True;
			if($y<$highestY){
				$highestY = $y;
			}
			if($y>$lowestY){
				$lowestY = $y;
			}
			$eax = $y;
			if(!$startedCharacter)
			{
			
				$data["x1"] = $x;
				$data["y1"] = $y;
				$startedCharacter = True;
			}
		}
		
	}
	
	if(($startedCharacter) && (!$hasBlack))
	{
		$data["x2"] = $x;
		$data["y2"] = $eax;
		$newWidth = $data["x2"] - $data["x1"];
		$newHeight = $lowestY - $highestY;
		$croppedLetter = imagecreate($newWidth,$newHeight);
		imagecopy($croppedLetter,$captcha,0,0,$data["x1"],$highestY,$width,$newHeight);

		$captchas[] = $croppedLetter;

		imagepng($croppedLetter,"tmp-$count.png");

		//imagerectangle($captcha,$data["x1"],$lowestY,$data["x2"],$highestY,"#FFFFFF");
		$startedCharacter = False;
		$highestY = 10000;
		$lowestY = 0;
		$count++;
	}

}
$i=0;
foreach(glob("phpbb-captcha/*.png") as $imageValue)
{
	$images[$i]["resource"] = imagecreatefrompng($imageValue);
	$images[$i]["path"] = $imageValue;
	$i++;
}

foreach($captchas as $captcha){
	$bestFit = 0;
	$height = imagesy($captcha);
	$width = imagesx($captcha);
	for($i=0;$i<count($images);$i++){
		$sum=0;
		for($x=0;$x<$width;$x++)
		{
			for($y=0;$y<$height;$y++)
				{	
					print $image["resource"];
					$pixelValue =  imagecolorat($captcha,$x,$y);
					$pixelValue_ = imagecolorat($images[$i]["resource"],$x,$y);
					if($pixelValue == $pixelValue_){$sum++;}
				}
		}
		if($sum > $bestFit){ $bestFit = $sum; $char=$images[$i]["path"];}
	}
	preg_match("@/([\d\w])@",$char,$match);
	echo $match[1];

}
?>