feature request : transformation autorange

[pierrelabreche]

When the input image is the result of a panorama assembly without cropping, the uncaptured areas are replaced by pure black.

It would be convenient to have the ability to ignore pure black when computing the black point.

[jsachs]

You can use the Color Remap Transformation to change just pure black to some other color.

[pierrelabreche]

You can use the Color Remap Transformation to change just pure black to some other color.

After remapping and changing the black point, I would like to remove that other color.

If another transformation is added to undo the color remapping, it would remap the original pure black areas and unintended areas of the image that potentially contain the other color.