MATLAB: How to calculate energy, contrast,Inverse, Skewness,Kurtosis,IDM,functions?Dissimilarity of a gray scale image using

feature extraction

PCA features

Best Answer

There is a predefined method available called graycoprops(). By using this method, you can calculate the feature values.

Related Solutions

MATLAB: Periodogram and Image Processing

xdft=fft2(x);
xdft=xdft.*conj(xdft);
xdft=xdft/(size(x,1)*size(x,2));
xdft=fftshift(xdft);
surf(xdft);

MATLAB: Kurtosis and skewness detection

See my demo on image moments, attached below in blue. It calculates skew and kurtosis of the histogram. Feel free to adapt it to your needs.

How were you getting the kurtosis of the entire image up to now? To get it for any particular blob, you have to call regionprops and ask for pixelList, as shown in my BlobsDemo tutorial in my File Exchange. Then loop over all blobs getting their kurtosis:

for k = 1 : numberOfBlobs           % Loop through all blobs.
  % Get list of pixels in current blob.
  thisBlobsPixels = blobMeasurements(k).PixelIdxList;
  % Get kurtosis of this blob, using your recipe or Image Analyst's.
  kurtosis(k) = ComputeKurtosis(thisBlobsPixels);
end

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Related Solutions

MATLAB: Periodogram and Image Processing

MATLAB: Kurtosis and skewness detection

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