once again I have a question related to digitalisation of slides:
I take pictures of my slides within the slide projector: I am using an Olympus MFT with aspect ratio 4:3, the slides have 3:2. So every picture is framed by a black border. Actually I remove it after raw-processing with an ImageJ plugin I programmed in Java.
Now the question: If the black border is cropped before or during raw-processing, is there an improvement of the raw processing? (e.g. contrast enhancement?) I asume there will be an improvement.
I am using rawtherapee and digikam (very seldom darktable) - is there an easy possibility to use own code on raw pictures?