Image feature extraction calculation

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Syed Zenith Rhyhan 2019-6-23

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评论： Manish M 2019-6-27

how can i calculate Contrast,Corelation,Homogeneity value from an image using Matlab?Please help me sharing the source code?

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Manish M 2019-6-23

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Image contrast: image_contrast = max(grayImage(:)) - min(grayImage(:));

Correlation Coefficient: It is calculated b/w two images not with a single image. correlation = corr2(a, b) where a and b are two images.

Homogenity: homogeneity = graycoprops(graycomatrix(img), 'Homogeneity')

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Syed Zenith Rhyhan 2019-6-23

I want to calculate the homogenity of images. This can be done directly in Matlab with

homogeneity = graycoprops(graycomatrix(img), 'Homogeneity')

Is that right?

Unfortunately I'm not allowed to use the image processing toolbox. Is there some formula for calculating the homogenity so that I can implement it myself?

Or is the sourcecode of graycomatrix and graycoprops available, so that I just can take it?

Manish M 2019-6-27

If you have the Image processing toolbox in MATLAB, then in the command window type 'edit graycoprops' & 'edit graycomatrix'. You'll get the source code.

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