Legacy ImageMagick Discussions Archive

Ah ok that makes sense. I will give this a shot as well and compare with hald.

Fred, so that last point is the 250,255. I set this as the max, but I also tried setting a max of 255,255 and then adding the plot point 250,255. There wasn't much of a difference when making this change though. Other then that it should match up in terms of breakpoints. Want me to post the PS ...

GreenKoopa, does hald 16 provide better accuracy?

Hi Fred, sure below is the screenshot of the preset I was using in PS. Does this help? I didn't know enough about the options panel to make changes within PS. Regarding the plot points I was using the combined curve of all RGB. I tried including 255 but I wasn't sure it was necessary when you note ...

I checked in PS within the color settings it is set to sRBG for the image I'm testing with. Also on save it retains sRGB. The -hald-clut method you mentioned totally solves my problem! The resulting image is just about spot on the same as when I process it within photoshop using the curves preset. I ...

Thanks for the fast response and for the useful scripts! I'm working through all of the items you listed. It seems to work better using 0-255 then when I attempted 0-100. I also attempted to add those endpoints in PS but it doesn't make a significant change since it allows the ends to not be at 0,0 ...

Hi all, I'm trying to use Fred's ImageMagick Curves Script to duplicate Photoshop Curves filter settings. I loaded the preset into Photoshop and wrote down the x/y pairs of the light (0-255) settings of the RGB combined curve. I've attempt it on the image below. It doesn't seem to match exactly. Is ...