<?php
set_time_limit(5);
$pic1="crackcha.jpg";
$pic2="crackcha_bw.jpg";
$cookie="WC4_SID=226191-7-hrfgW0Qp400r8xRF";
$url="http://www.wechall.net/challenge/crackcha/index.php";
$ch = curl_init();
curl_setopt($ch, CURLOPT_RETURNTRANSFER,1);
curl_setopt($ch, CURLOPT_COOKIE, $cookie);
curl_setopt($ch, CURLOPT_URL, $url);
$res=curl_exec ($ch);
curl_close($ch);
//echo $res,"<br>";
$busca1="/dbimg/crackcha/";
$busca2=' alt="Crackcha"';
$donde1=strpos($res,$busca1)+16;
$donde2=strpos($res,$busca2,$donde1)-1;
$urlpic="http://www.wechall.net/dbimg/crackcha/".substr($res,$donde1,$donde2-$donde1);
//echo $urlpic;
save_image($urlpic,$pic1);
$im1=imagecreatefromjpeg($pic1);
$ancho=imagesx($im1);
$alto=imagesy($im1);
$im2=imagecreatetruecolor($ancho,$alto);
$b=imagecolorallocate($im2,0,0,0);//black
$w=imagecolorallocate($im2,255,255,255);//white
$treshold=90;
//convert to black & white
for($x=0;$x<$ancho;$x++){
for($y=0;$y<$alto;$y++){
$rgb = imagecolorat($im1, $x, $y);
$r = ($rgb >> 16) & 0xFF;
if($r < $treshold){
imagesetpixel($im2,$x,$y,$b);
}else{
imagesetpixel($im2,$x,$y,$w);
}
}
}
header('Content-Type: image/jpeg');
imagejpeg($im2);
imagedestroy($im1);
imagedestroy($im2);
function cleardots($im,$x,$y){
global $im1;
global $x;
global $y;
$values=array("","","","","","","","");
$count=0;
}
function save_image($inPath,$outPath){ //Download images from remote server
$in= fopen($inPath, "rb");
$out= fopen($outPath, "wb");
while ($chunk = fread($in,8192))
{
fwrite($out, $chunk, 8192);
}
fclose($in);
fclose($out);
}
?>
preferences:
36.45 ms | 402 KiB | 5 Q