Legacy ImageMagick Discussions Archive

I did try that. Do you mean before or after changing Photoshop's color profile to Gamma 2.2?

I was able to resolve it. It seems that Photoshop defaults to a particular color profile, Dot Gain 20%, that ImageMagick can't recreate. Changing the color profile to Gray Gamma 2.2 got IM much closer to Photoshop's results.

You can change the color settings in Photoshop by clicking Edit -> Color ...

I was able to resolve it. It seems that Photoshop defaults to a particular color profile, Dot Gain 20%, that ImageMagick can't recreate. Changing the color profile to Gray Gamma 2.2 got IM much closer to Photoshop's results.

You can change the color settings in Photoshop by clicking Edit -> Color ...

I have messed with the Gamma option substantially. Usually, applying -Gamma 2.2 gets it closer to where it should be, but not close enough. Here is a zip file containing three Photoshop PSDs. Test.dds is the source file I'm working with, photoshop_output.dds is what I get when I do the method in my ...

Thanks for the help either way :)

Is anyone else capable of helping? I'm starting to think this has something to do with color profiles. If I change Photoshop's color profile to Gamma 2.2 (from Dot Gain 20%), the colors match much more closely with the output from IM. It still isn't exact, however ...

The reason is this: I work for a video game developer and I'm writing a DDS file manager for our artists that allows them to take an image's data and "paste" it into channels they specify in a DDS file. For example, they can take image 1's G channel and put it in the DDS file's R channel, or they ...

I tried your process and tried every intensity method available but none of them match. Here are the results:

Starting Image
Grayscaled through Photoshop using method I outlined in my first post

Rec601Luma
Rec601Luminance
Rec709Luma
Rec709Luminance
Brightness
Lightness
Average ...

Hello, I do something specific in Photoshop that I'd like to try doing in ImageMagick.

Basically, I take an image (with RGB channels), copy the full image, and paste it into a new image's R channel. Then I do the same for the B and G channels.

What would be the equivalent of this in ImageMagick ...

You might try converting test.dds to greyscale, making say testbw.dds. Then repeat your IM and PS processes with testbw.dds. I expect the results will be identical to each other. (And they will be identical to testbw.dds. I can't see the point of your processes.)
I tried this, but it still comes ...

Hello, I'm trying to combine 3 DDS images into a new DDS image's RGB channels. When I do this in both Photoshop (CS5) and using ImageMagick (6.8.8-5 Q16 x64), the IM results are slightly darker than the PS results. You can download the DDS files I reference below here .

The ImageMagick command I'm ...