I’m working with images which have wildly varying amounts of black background forming a frame. There may well be some large “out of image” white areas - but I think the major problem is a black frame.
I have attempted to use “Adjust brightness/contrast” - but haven’t found the right settings (or perhaps the right settings don’t exist). Before I write my own - can someone tell me how to IGNORE the black frame?
The problem is that the presence of the black frame prevents “adjust brightness/contrast” from finding the black level in the image proper. In that case, the adjusted image is much too bright.
The easiest fix I can think of is to pick a threshold and create a mask which would prevent the masked pixels from being included in the histogram used to do the brightness/contrast adjustment. All the masked pixels would, of course, be mapped to 0 in the transformed image - that’s just fine.
So…can this be done using existing plugins? Or, should I just write my own Java code. That’s not really a problem, but I’d prefer to use standard-issue ImageJ commands wherever possible.
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Kenneth Sloan
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Vision is the art of seeing what is invisible to others.
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