how to set generalised threshold values in histogram eqivalent to get a clear image

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rohith bharadwaj 2018-1-17

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https://ww2.mathworks.cn/matlabcentral/answers/377621-how-to-set-generalised-threshold-values-in-histogram-eqivalent-to-get-a-clear-image

评论： Image Analyst 2018-1-18

I have a grayscale image. I've performed histeq() function on it. I have to write a generalised code by comparing pixels with its neighbouring pixels for different images to find threshold values to make the image much clearer. Ive attached grayscale image and its histeq image. I have to give threshold values for histeq function to get image much more clearer to detect tumour.

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Answer 1

Image Analyst 2018-1-18

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Histogram equalization does not help with determining a threshold. Plus it gives crummy looking images. Don't waste your time.

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rohith bharadwaj 2018-1-18

编辑：rohith bharadwaj 2018-1-18

Is there a better way to make the image clear in grayscale representation. So that I can easily distinguish tumour . It should be easy for me to do contour segmentation later.

Image Analyst 2018-1-18

Some kind of spatial filtering may help, but just a global readjusting of graylevels like a histogram equalization does is useless. All that does is make the threshold at a different value than it would otherwise be at but it doesn't give you any different binary image than if you hadn't done equalization.

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