Legacy ImageMagick Discussions Archive

Yes

I'd like to take an image and randomly remove 75% of the pixels. Can this be done?

[deleted] - I figured it out!

Hi guys...I'm just figuring out ImageMagick. This is what I'd like to do.

I'd like to take a photo and apply the following spectrum to it:



I greatly appreciate any help on how to do this!

First of all, thanks for the great help I have gotten so far!

What I want to do is take an image and then apply the following gradient to it:



Is this possible? It looks to me like CLUT uses premade gradients.

I think I figured it out...I'll post it in case it helps anyone else. This is the code I used: <?php $test_directory = 'temp_images'; $command = "convert $test_directory/rainbow1.jpg -colorspace Gray $test_directory/rainbow3.jpg"; $test_image = system($command, $returnVal); if ($returnVal > 1) echo ...

Thanks. I found exactly what I want to do....I want to use to -clut function to replace one spectrum with another. Now I just need to figure out how to use IM via a php script. (I just started a new topic to ask about this.)

This is likely a dumb question, but I cannot figure out how to launch ImageMagick via a php script. My host tells me IM is available in /usr/bin This is what I am trying: <?php $cmd = '/usr/bin/convert "/images/rainbow.jpg" -colorspace Gray "/images/gray_rainbow.jpg"'; exec($cmd); ?> But it does not ...

excellent! thank you.

Let me see if I can simplify my question...

Is it possible for me to take all of the purple in a photo and change it to blue using imagemagick?

I would like to create a webpage where a user can upload a photo and then it gets converted so that they can see what their dog would see. I have never used ImageMagick but before I go through the learning curve I'd like to make sure this can be done. What I want to do, for example, is take ...