MATLAB: List various image similarity features

Image Processing Toolboximage similarity features

i've divided the image into overlapping blocks. can anybody tell me the methods for comparing the similarity of two image blocks?

intensity mean and glcm mean i know. except these two what other methods are that i can use?

Best Answer

There are literally thousands upon thousands of things you can measure about an image. No one can list them all. You have to say what you're looking for and measure only those things, and not waste time measuring the thousands of other things that you could possibly measure. For example, you could measure SSIM (<http://en.wikipedia.org/wiki/SSIM)>, PSNR, area fraction, length of your widgets, concentration of fluorescent dye, amount of radioactivity, number of people, speed of cars, equivalent circular diameters, morphometrics, volume of logs on the timber truck, quantity of heat emanating from the building, or countless other things.

Related Solutions

MATLAB: Calculation of GLCM Mean

hi Jassy ,

there is an answer ( to check ...) in previous question, i repost it here anyway for further discussion/correction with other Contributers :

 I=imread('liftingbody.png'); 
 G=graycomatrix(I);
 [m n]=size(G); 
 GLCMl=0  % left hand side  mean
 GLCMr=0; % right  hand side mean
 for x=1:m
    for y=1:n
        GLCMl=GLCMl+x*G(x,y);
        GLCMr=GLCMr+y*G(x,y);  
  end
end

The difference between the two is 111.

MATLAB: Image comparison

You could use SSIM : http://en.wikipedia.org/wiki/SSIM "The structural similarity (SSIM) index is a method for measuring the similarity between two images. The SSIM index is a full reference metric, in other words, the measuring of image quality based on an initial uncompressed or distortion-free image as reference. SSIM is designed to improve on traditional methods like peak signal-to-noise ratio (PSNR) and mean squared error (MSE), which have proved to be inconsistent with human eye perception."

or better yet, do some research on CBIR. Just Google "CBIR database"

Best Answer

Related Solutions

MATLAB: Calculation of GLCM Mean

MATLAB: Image comparison

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