Legacy ImageMagick Discussions Archive

I have some real problems to extract a reflection from a given image. My goal is to overlay a banner with a solid color but keep the reflection intact. So my idea was to extract the reflection first to be able to overlay the reflection over the banner afterwards. As a result I want the image to look ...

Thanks a bunch for all the great responses!

Is there any speed benefit to use "clut" instead of "hald-clut"? What's the faster way?

Or in other words: why trying to replicate the interpolation of photoshop when it's easier to use photoshop itself.

The curves that I want to simulate from photoshop have about 13 control points in each channel. There are no adjustments in the curves-dialog on the "rgb"-channel. In my opinion a grayscale-clut is the perfect solution because it covers all possible shiftings. In every channel, there are max. 256 ...

Of course it does. But if I understand "-hald-clut" correctly it does shift whole color-values (so all 3 components of a pixel) and interpolates between them if one color isn't found directly in the lookup-table. But "clut" works on one component separetly - exactly like curves on single channels ...

Sorry for replying to this old thread. But this could be interesting for anybody that wants to emulate/duplicate photoshop curves within ImageMagick: I developed an own method that does not need any crypted spline-methods, weird linux-scripts or some other difficult stuff. Just download the ...