How can i calculate NPCR and UACI values to test the differential attacks for an image encryption

I am implementing an Image Encryption and want to calculate theUACI and NPCR to test for differential attack. Any help please?

Answer 1

[Srivardhan Gadila]

The following MATLAB Answer: Calculating UACI, NPCR for 2 images or the File exchange submission: NPCR and UACI measurements with statistical tests might be useful.

For other relevant resources, refer to the following page: NPCR, UACI - MATLAB

[Abubakar Abba]

Thanks