PHP imagecreatefrompng losing color

Question

I'm doing a simple load of an image using imagecreatefrompng.

The background of the image is #E5DDBB. Using the code below, it renders the image but the background is now #DED6AD.

http://www.letslogic.com/test.php contains the following:

<img src="images/skins/yoshi/0.png">

<img src="dyn_image.php">

dyn_image.php contains:

<?php

$im = imagecreatefrompng('images/skins/yoshi/0.png');

header("Content-Type: image/png");

imagepng($im);

?>

If you look at the two images that test.php shows, the images are different colours...

Not that I can see... http://letslogic.com/images/skins/yoshi/0.png — letslogic.com, Sep 17 '13 at 09:45
Is this the original image? Because the background is #DED6AD to me. — Attila Szeremi, Sep 17 '13 at 09:49
I see http://letslogic.com/images/shot.png When I compare using colorpic, I see different colours. — letslogic.com, Sep 17 '13 at 09:59
So if the image you linked previously was not the resulting image, but the original image, can I have the original image? — Attila Szeremi, Sep 17 '13 at 10:43
http://letslogic.com/images/skins/yoshi/0.png is the original image - my screenshot is using the original image. — letslogic.com, Sep 17 '13 at 11:18
Still #DED6AD. So far it seems your verification of the original image's background color is incorrect. — Attila Szeremi, Sep 17 '13 at 11:42
Can you now see two different images in http://www.letslogic.com/test.php? — letslogic.com, Sep 20 '13 at 03:21

score 1 · Accepted Answer · answered Sep 20 '13 at 10:32

Apparently this is a color profile issue. Something to do with the image being of one color profile, whereas gd only lets you save your image in the one color profile it knows how to save images by which differs from the inputted image's, resulting in the colors looking different.

It seems you are going to need to use imagemagick to not have the colors changed. You should read these:

http://www.zenphoto.org/support/topic.php?id=3582

http://devot-ee.com/add-ons/support/ce-image/viewthread/1085

Yep, "GD, ignores color profiles" as explained in http://www.human-element.com/Blog/ArticleDetailsPage/tabid/91/ArticleID/57/A-Tale-of-Two-Images.aspx — Bob Fanger, Jan 17 '14 at 12:56

PHP imagecreatefrompng losing color

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