image editing

colorizing

Colorizing

Colorizing images is fairly easy to do. The easiest way to colorize an image is fairly simple to grasp. Create an image of the same dimensions and fill that image with the color you want to change it to. This new image is then placed on top of the older image, giving it a colorized look.

function imagecolorize( ) [ line 2 ]

full source of colorizing [ line 1 - 30 ] | download colorizing

1	<?php
2	function imagecolorize (& $im ,& $col ,$pct )
3	{
4	// Get the image's width
5	$im_w = imagesx ($im );
6	// Get the image's height
7	$im_h = imagesy ($im );
8	// Set a pixel with the color, so we can get it easily
9	$setpixel = imagesetpixel ($im ,$im_w ,0,$col );
10	// Get the color
11	$index = imagecolorat ($im ,$im_w ,0);
12	// Find the color in the index
13	$rgb = imagecolorsforindex ($im ,$index );
14	// Get the red value
15	$r = $rgb ["red" ];
16	// Get the green value
17	$g = $rgb ["green" ];
18	// Get the blue value
19	$b = $rgb ["blue" ];
20	// Create the layover
21	$layover = imagecreate ($im_w ,$im_h );
22	// Allocate the color on this image
23	$color = imagecolorallocate ($layover ,$r ,$g ,$b );
24	// Fill the image with the new color (this really isn't needed)
25	$fill = imagefill ($layover ,0,0,$color );
26	// Merge the layover on top of the older image
27	$merge = imagecopymerge ($im ,$layover ,0,0,0,0,$im_w ,$im_h ,$pct );
28	imagedestroy ($layover ); // Destroy the layover
29	}
30	?>

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