I recently tried to follow an example of color correction by using LRGB channel extraction, Linear Fit, and LRGB Combination. Everything seemed to go well until the final reassembly of the image. A complete workflow (as best my memory serves me) is below.
From a 32bit floating point TIFF OSC frame from a DSLR I did the following: 1) Extracted the Luminance channel, then minimized it for later work. 2) extracted the RGB channels into separate images. 3)Using Linear Fit, I selected the RED channel image as a reference, then accepted the defaults and applied Linear Fit to the Blue and Green channel images. 4) next using LRGB Combine I reassembled the R,G, and B, channel images into one RGB file. 5) on the resulting RGB file I applied Curves Transformation (Saturation) and a bit of Color Saturation to boost some reds and pinks, and then ACDNR to blur a bit of the background noise. Finally I applied Histogram Transformation using the STF settings to set the RGB image to non-linear.
With the RGB done, I then moved on to the Luminance image I had extracted earlier to: 6) STF autostretch applied to Histogram Transformation. Then 7) Local Histogram Equalization to try for a bit more detail in the structure.
Lastly, (and this is where my problem arises) I opened LRGB Combination again, this time selecting only the Luminance channel image. I then dragged the process icon triangle over to the RGB image to apply the combination.
This step failed --- I got an error stating the geometry of the 2 images did not match --- What did I do incorrectly or what step did I leave out?
