How to calculate NPCR and UACI of 64*64 binary image?

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Shikder Shafiul Bashar

Hello Sanjay Kumar

Hope this may help you:

https://www.mathworks.com/matlabcentral/fileexchange/43603-npcr-and-uaci-measurements-with-statistical-tests

Regards

Ayman M. Abdalla

The following paper calculates NPCR and UACI for binary and grayscale images and it provides tables of NPCR and UACI values for images of different sizes.

https://pdfs.semanticscholar.org/2b47/9abce221135af6065f9f8352e09cbfb5733a.pdf