如何计算图像的能量和相关性

Question

有人可以帮助我如何使用MATLAB计算图像的能量和相关性吗？

Answer 1

我认为您正在寻找graycomatrix和graycoprops。从graycoprops文档中，可以计算出两个属性：

'Correlation'   statistical measure of how correlated a pixel is to its 
                neighbor over the whole image. Range = [-1 1]. 
                Correlation is 1 or -1 for a perfectly positively or
                negatively correlated image. Correlation is NaN for a 
                constant image.

'Energy'        summation of squared elements in the GLCM. Range = [0 1].
                Energy is 1 for a constant image.

要计算这些属性，首先通过graycomatrix计算graylevel同现矩阵，然后调用graycoprops。例如，

I = imread('circuit.tif');
GLCM = graycomatrix(I,'Offset',[2 0;0 2]);
stats = graycoprops(GLCM,{'correlation','energy'})

您只需要确定Offset的{​​{1}}参数即可。彻底的选择是graycomatrix

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要计算GLCM的熵，您无法使用offset = [0 1; -1 1; -1 0; -1 -1];，因此您必须自己完成：

graycoprops