How to compute the scaled version of gray scale image

Question

Gunjan Gautam 2020-2-25

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https://ww2.mathworks.cn/matlabcentral/answers/507439-how-to-compute-the-scaled-version-of-gray-scale-image

评论： Gunjan Gautam 2020-3-2

Method graycomatrix returns a glcm and a sclaed version of input image. I was just wondering how to scale the image to 8 gray scales. Also, I want some clarity on Energy obtained from this glcm. Energy needs to have values between 0 and 1 where 1 represents that the image is constant. So, can I say that Energy value closed to 0 is desired and this represents high energy ??

Please help

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Answer 1

Devineni Aslesha 2020-2-28

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The ‘NumLevels’ property in ‘graycomatrix’ function scales the image to 8 gray scales as the default value of ‘NumLevels’ is 8. The maximum value of energy is ‘1’ which is obtained for a constant image.