Use of square brackets
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I know this sounds a silly question, but what is the difference between using imshow(X); and using imshow(X,[]); ? For some images, I'm unable to display them using the first command.
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Image Analyst
2012 年 11 月 25 日
You use [] to scale the image to the range 0-255. This will maximize the contrast. If you have a double or single image, then it expects the range to be 0-1. If your image is not in that range, then it will show as all white or all black depending on if it's more than 1 or less than 1. For example, if your image goes from -242.99 to +5782.123, then it will set -242.99 to 0, and 5782.123 to 255 and linearly scale everything in between.
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