header("Content-type: image/jpeg");
   	$input=imagecreatefromjpeg($_REQUEST['name']);   // input image file path
   	$width=imagesx($input);    // Width of image   
	$height=imagesy($input);   // Height of image   
   	$im = imagecreatetruecolor($width, $height);   // output image

   	for($y=0; $y < $height; $y++) {
      	for($x=0; $x < $width; $x++) {

         	$colors=imagecolorsforindex($input, imagecolorat($input, $x,$y));   // Extract the pixel color
         	
        	// Image Processing code here [START]
			
		// Code for generating Black and white copy of image.
		$common = ($colors['red']+$colors['blue']+$colors['green'])/3;
         	$r=$common;
         	$g=$common;
         	$b=$common;
         		
		// Code for generating Negative copy of image.
         	$r=255-$colors['red'];
         	$g=255-$colors['green'];
         	$b=255-$colors['blue'];

        	// Image Processing code here [END]

         	$color=imagecolorallocate($im, $r,$g,$b);
         	
		imagesetpixel($im,$x, $y, $color);
      	}
   	
	}
        
	$textcolor = imagecolorallocate($im, 0, 0, 255);

        // Write the string (watermark) at the bottom left
        imagestring($im, 3, 5, $height-15, 'WWW.PUNEETK.COM', $textcolor);

   	imagejpeg($im);
   	imagedestroy($im);