Do you know any histogram modification methods?
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I'm looking for any histogram modification methods besides Equalization and Stretching the histogram. Code for them would be very helpful too.
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Image Analyst
2022-6-25
编辑：Image Analyst
2022-6-25
0 个投票
In the Image Processing Toolbox there are
- histeq, which gives lousy images,
- adapthisteq which gives good images.
- imadjust which expands the dynamic range. Usually not needed but can be if you want to save a contrastier image with imwrite
- Morphological functions like imclose and friends
- Denoising functions like medfilt2
There are many, many others. Almost anything you do to an image will change the image, even something as simple as adding a number to it or multiplying it by an intensity scaling factor, or even denoising. Your question can't be answered comprehensively because there are just a bazillion answers.
5 个评论
Jakub Mis
2022-6-25
Image Analyst
2022-6-25
The histogram is an array of counts. Just a normal array of numbers. Again, you can do virtually anything with a generic array of numbers. Like you could use cumsum to compute a cdf. Or you could use findpeaks or max() or islocalmin() or anyone of hundreds of functions that operate on vectors.
Rather than ask the unanswerable "What can I do?", why don't you explain what you want to do and ask "How can I do that?"
Jakub Mis
2022-6-25
Besides functions before I need to implement some of the modifications below. Honestly even one could be helpful. Then I'll be able to implement rest of them.
Image Analyst
2022-6-25
You can get the probability with the 'Normalization' option in histogram. Then you can plug that P into your equations to get a new gray level for the graylevel at P(z). You can transform the whole image in one equation like they show.
Jakub Mis
2022-6-25
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