Imagick colorizeImage Hex darker

Question

I use PHP and Imagick to change the color of a transparent PNG. The image in the PNG is a simple shape with a transparent background.

I use the colorizeImage function to change the color.

$img = new Imagick("shape.png");
$img->colorizeImage("#99ccff",0.0);

The problem is that Imagick show a dark version of my HEX code (#99ccff)?

Is there a way to get the exact color (#99ccff)?

(my PNG is PNG 32 - and the shape is black)

How are you comparing the colors? If you're doing something like looking at the color in Photoshop vs a browser you may see discrepancies. — Charlie Schliesser, Dec 19 '11 at 16:00

score 5 · Answer 1 · edited Nov 18 '16 at 16:54

5

I thought I would answer this question despite that it is old. This is for anyone else having this problem.

I solved this for a project I am working on by simply using "Clut" instead, like so:

$img = new Imagick("shape.png");
$clut = new Imagick();
$clut->newImage(1, 1, new ImagickPixel('#99ccff'));
$img->clutImage($clut);
$clut->destroy();

Hope it helps anyone else having this issue.

edited Nov 18 '16 at 16:54

Eric

answered Jan 23 '14 at 09:39

MrE

Two things: 1) this should be marked as the correct answer as it entirely avoids the "darkening issue" the original question referenced... which I also experienced and how I ended up here. 2) I'm 100% certain the $image you use above was supposed to be $img. Great great answer. Thank you MrE. – Art Geigel Mar 05 '15 at 22:54
@ArtGeigel agreed I edited the typo. It should be img. – Eric Nov 18 '16 at 16:54

score 2 · Answer 2 · answered Nov 19 '11 at 08:08

2

 $img = new Imagick("shape.png");
 $img->colorizeImage("#99ccff",0.0);

That second parameter is opacity. If you set it to 1.0, it will match #99ccff 100%. You can set it to 0.5 to meet 50% over the original layer, etc:

 $img = new Imagick("shape.png");
 $img->colorizeImage("#99ccff", 1.0);

answered Nov 19 '11 at 08:08

Authman Apatira

1

Thank you for your reply. This still gives me a darker color. I had to change the 1.0 to 1 to get it work, otherwise its transparent. – pelelive Nov 19 '11 at 09:21
Confirmed on my end too... had to just make it "1" and not "1.0" for it to behave as intended. – Art Geigel Jan 20 '15 at 21:29

score 1 · Answer 3 · answered Nov 19 '11 at 08:11

1

You must provide opacity, and opacity value MUST be integer 1,

$img->colorizeImage('#99ccff', 1);

or it does not work, i have tested a bit and i think to work with transparency you need to provide alpha channel.

answered Nov 19 '11 at 08:11

Aurimas Ličkus

Thank you for your reply. This still gives me a darker color, do you have any example to change the alpha? – pelelive Nov 19 '11 at 09:25

3 Answers3