MATLAB: How to compare two images of diffrent sizes.,like 8×8 and 512×256.

image processingImage Processing Toolboximage segmentation

Basically, i want to do the pixel wise comparison of two diffrent sized images and find out the match between the two images. Thanks in advance.

Best Answer

Are you trying to find the location of the small image which is located somewhere within the larger image? If so, see this demo for normxcorr2:

http://www.mathworks.com/matlabcentral/answers/79973#answer_89685

If not, please give your definition of "pixel wise comparison" as that is not specific enough - it could mean virtually anything.

Related Solutions

MATLAB: How to compare two images and find the similarity percentage

Hi Parth,

For finding structural similarity index between two images you can use ssim function. If there is translation and rotation, then you may need to use xcorr2 to find where the second image fits in the first image. Although cross correlation may not be able to figure out a similarity index like ssim, you may first align both image using method mentioned here, then can apply ssim on output images.

MATLAB: Dct (8*8)

If you have the Image Processing Toolbox.

X = randn(100,100);
fun = @(block_struct) dct2(block_struct.data);
Y = blockproc(X,[8 8],fun);

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Related Solutions

MATLAB: How to compare two images and find the similarity percentage

MATLAB: Dct (8*8)

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