A dependency-light Python script that computes PSNR between two image or frame files from first principles — Mean Squared Error, then the decibel conversion — printing every intermediate value (per-channel MSE, MAX, MSE, PSNR in dB) so the reader can see exactly where the number comes from. Includes the equivalent FFmpeg psnr/xpsnr commands in comments. (ZIP containing 1 file(s) — scripts, datasets, provenance).
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