Resizing images with white background

[angelcool]

Hello phpfreaks community,

 

I am using the following php script to resize .gif images with the GD library; It works very decent:

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$src_img =imagecreatefromgif("bulb_gif.gif");

$srcsize = getimagesize('bulb_gif.gif');

$dest_x = 200;

$dest_y = (200/ $srcsize[0]) * $srcsize[1];//resize ratio.

$dst_img = imagecreatetruecolor($dest_x, $dest_y);

 

// Resize image

imagecopyresampled($dst_img, $src_img, 0, 0, 0, 0, $dest_x, $dest_y, $srcsize[0], $srcsize[1]);

 

// Output image

header("content-type: image/gif");

imagegif($dst_img);//final image

 

// Destroy images

imagedestroy($src_img);

imagedestroy($dst_img);

 

------------------------------------------------------------------------

 

 

The problem is when resizing images with white background (not transparency), after the script is executed the image background turns not being 100% white (255,255,255). Links:

 

Original .gif file: http://10-network.net/image_thumbial/bulb_gif.gif

Resized image: http://10-network.net/image_thumbial/index.php

 

You can notice the difference between the resized image and the page background. This varies from LCD to LCD, I can tell the difference in my main screen is about 75%, in other screens I have around this is about 90%.

 

Any help will be gently apreciated.

 

Thank you.