Image Quantization in GLCM

Junaid Dar Dar

2021 2 17

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Image quantization is an important step for feature extraction through GLCM. Although there are many questions related to this but there is no proper answer for Quantization problem in MATLAB.

I am using this code:

i= imread('image');

g=rgb2gray(i);

levels=multithresh(g,7);

A=imquantize(g, levels);

B = uint8(A);

glcm=graycomatrix(B, 'offset', [-1 0]);

stats = graycoprops(glcm);

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KALYAN ACHARJYA 2021-2-17

编辑：KALYAN ACHARJYA 2021-2-17

"code it give some solution?

Can you share the objective?

B have only 8 levels, whereas g have 256 levels.

Junaid Dar Dar 2021-2-17

My objective is to get statistical features of an image using GLCM. But as you may know, for this purpose we have to quantize image to 4 or 8 graysclae so that we can use it in GLCM. But when I quantize my image 'g' to 'B' and use it in graycomatrix, it doesnot give solution.

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