PHParadise | category image editing | copy source code of grayscale an image

PHParadise > image editing > grayscale an image

converts an image into greyscale

copy the code of image editing / grayscale an image

<?php

/*------------------------------------------------------------------------------
|
|                             PHParadise source code
|
|-------------------------------------------------------------------------------
|
| file:             grayscale an image
| category:         image editing
|
| last modified:    Sat, 02 Jul 2005 00:14:57 GMT
| downloaded:       Thu, 24 May 2012 08:17:02 GMT as copy from textarea
|
| code URL:
| http://phparadise.de/php-code/image-editing/grayscale-an-image/
|
| description:
| converts an image into greyscale
|
------------------------------------------------------------------------------*/

function create_grey($input,$output)
{
	$bild = imagecreatefromjpeg($input);
	$x = imagesx($bild);
	$y = imagesy($bild);

for($i=0; $i<$y; $i++)
	{
		for($j=0; $j<$x; $j++)
		{
			$pos = imagecolorat($bild, $j, $i);
			$f = imagecolorsforindex($bild, $pos);
			$gst = $f['red']*0.15 + $f['green']*0.5 + $f['blue']*0.35;
			$col = imagecolorresolve($bild, $gst, $gst, $gst);
			imagesetpixel($bild, $j, $i, $col);
		}
	}
	imagejpeg($bild,$output,90);
}
  
?>

PHParadise source code of “grayscale an image” in category “image editing”

PHParadise > image editing > grayscale an image

copy the code of image editing / grayscale an image