Hi! It looks to me that the histogram that is shown in the background of the > curves tool shows the histogram AFTER the curves been applied, since you can > see it change while changing the curves. I find it a bit difficult to use > this way, I'd prefer to see in the background the histogram of the image > right before the curve is applied. For me, looking at the input histogram > makes is much easier for me to adjust curves. Plus, the x-axis of the curve > tool represents the input values anyways. I'm curious what everyone's > thought on this are? >
You are completely correct, and we are aware of that issue. Unfortunately it is not an easy thing to do, since curve correction is done in the middle of the color correction, and we don't have a way of reading out the data at that particular step. But of course we are looking for a fix for this issue, and it will be fixed some time in the future. > > And a separate question on curves, what are the thoughts on having separate > curves available for each color channel? Maybe having a dropdown or tabs > that select whether you're operating on the RGB, R, G, or B channels? > Curve correction is done in HSV (also called HSL) mode, only modifying the V component. While it isn't impossible to do in RGB mode, we have found that HSV gives a much better correction than RGB, which will also influence saturation a great deal. Here is a blog post about how we do colour correction: http://rawstudio.org/blog/?p=236 I honestly feel that individual R-G-B curves are out of the scope of this program, but I've been proven wrong before :) > Thanks, > Wes > > Ps, great work on the daily version, I can't believe the number of > improvements that have been made! > Thanks - let's hope we can get a 2.0 beta out the door soon! :) Regards, Klaus Post http://www.klauspost.com
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