MATLAB: Remove background and increase the contrast

increase signalremove background

Hi everyone,
I am having a problem with my images. I have no idea on how to remove the background (grey color) and increase the contrast of gap (black one). Attached the image.
Could anyone please help me to solve my problem.
Thank you in advance 🙂

Best Answer

For the contrast, have you tried imadjust?
For the background, typically, you record a background image that you then subtract from your test images (for dark background). In your case, however, you could simply threshold the image. Assuming that your image is uint8, does
yourimage(yourimage > 127) = 255;
work for you?
However, if you're going to binarise your image, then you don't need to adjust the contrast or play around with the background,
imbinarize(yourimage)
should isolate the black from the background.
Related Question