NPCR and UACI measures for image encryption

Version 1.0.2 (2.01 MB) by Lazaros Moysis
Compute the NPCR and UACI measures for two encrypted images
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Updated 10 Jan 2024

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The following code computes the Number of Pixels Change Rate (NPCR) and Unified Average Changing Intensity (UACI) measures between two encrypted versions of the same image, different only by one pixel.
So the plaintext image was first encrypted.
Then, one pixel of the plaintext was changed, and the image was encrypted again.
The NPCR and UACI measures for these two images are computed.
If the encryption is plaintext dependent, the meaasures should be the ideal ones.
Video:
https://www.youtube.com/watch?v=M16KViUjjlI
Reference:
https://link.springer.com/chapter/10.1007/978-3-030-92166-8_7

Cite As

Lazaros Moysis (2024). NPCR and UACI measures for image encryption (https://www.mathworks.com/matlabcentral/fileexchange/155712-npcr-and-uaci-measures-for-image-encryption), MATLAB Central File Exchange. Retrieved .

MATLAB Release Compatibility
Created with R2023b
Compatible with any release
Platform Compatibility
Windows macOS Linux

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Version Published Release Notes
1.0.2

fixed video links
1.0.1

added a video link
1.0.0