Which image filter to use

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Jórdan Venâncio Leite 2022-2-24

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评论： Jórdan Venâncio Leite 2022-2-28

Hello, could you indicate me some criteria (or any filter) that allow me to say that image 1 has a bigger brighter region than any bright region in image 2?

thanks in advance.

img1

img2

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yanqi liu 2022-2-24

yes，sir，may be use adaptive_mediafilter、imadjust and so on to enhance target area

Jórdan Venâncio Leite 2022-2-28

thanks for your answer yanqi liu i'll try it

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Image Analyst 2022-2-24

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There is no hope of identifying regions that have any relation to the actual physical bubbles. Like I've said before you need to just concentrate on builk properties than trying to do particle sizing. For example, you can say that the mean gray level of the bottom image is greater than that of the top image.

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Image Analyst 2022-2-28

编辑：Image Analyst 2022-2-28

在 MATLAB Online 中打开

You can get the brightness profile like this:

verticalProfile = mean(grayImage, 2);
plot(verticalProfile, 'b-', 'LineWidth', 2);

You can then examine the vertical profile to learn where the bubbles are. A variance filter won't be any better than the original image, in fact it might be worse. A histogram doesn't have any information on where the pixels with those gray levels are.

Jórdan Venâncio Leite 2022-2-28