I would love to see Beyond Compare adopt these three key capabilities that keep me using The Compressonator (a free tool from AMD) as my go-to image differencing tool, instead of Beyond Compare:
1.
Mirror the user pointer to show it's position in all three image panes, so you can see your detail-info location easily by eye within each image.
2.
Support an alternate "Flip Mode", that hides the diff panel, and provides a hotkey to flip quickly and cleanly back and forth between the first and second image. This is really helpful for subjective image quality comparison (no blanking, tearing, or other artifacts duing the flip).
3.
Support a difference image constructed from the absolute value of the color channel differences between the first and second images, with 'diff brightening'.
Base image in difference panel is computed by computing the absolute value of the difference per color channel (red, blue, green) for each pixel in the first and second images.
E.g. for typical 8-bit color images, if a pixel in the first and second images differs only in the green channel by 2, the corresponding pixel in the diff image have a green value of 2, and red and blue values of zero.
For images with subtle differences, this results in a dim image, but the base diff image can be brightened by multiplying the diff values by 2, 4, 8, 16, 32, 64, 128, 256. The maximum brightness multiplier ensures that even a 1-unit difference would be enhanced to be shown as maximum brightness.
The Compressonator can be found here:
http://developer.amd.com/tools-and-s...ompressonator/
1.
Mirror the user pointer to show it's position in all three image panes, so you can see your detail-info location easily by eye within each image.
2.
Support an alternate "Flip Mode", that hides the diff panel, and provides a hotkey to flip quickly and cleanly back and forth between the first and second image. This is really helpful for subjective image quality comparison (no blanking, tearing, or other artifacts duing the flip).
3.
Support a difference image constructed from the absolute value of the color channel differences between the first and second images, with 'diff brightening'.
Base image in difference panel is computed by computing the absolute value of the difference per color channel (red, blue, green) for each pixel in the first and second images.
E.g. for typical 8-bit color images, if a pixel in the first and second images differs only in the green channel by 2, the corresponding pixel in the diff image have a green value of 2, and red and blue values of zero.
For images with subtle differences, this results in a dim image, but the base diff image can be brightened by multiplying the diff values by 2, 4, 8, 16, 32, 64, 128, 256. The maximum brightness multiplier ensures that even a 1-unit difference would be enhanced to be shown as maximum brightness.
Code:
8-bit RGB images example pixel diff:
Image
Color -------------------------------------------------------
Channel 1 2 Diff @ 1x Brightness Diff @ 64x Brightness
--------- ---- ---- -------------------- ---------------------
Red 10 11 1 64
Green 10 8 3 192
Blue 5 10 5 255 (clamped from 320)
http://developer.amd.com/tools-and-s...ompressonator/
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