Photo Similarity

[avinatbezeq]

Could you provide some info about how Image Mode works? The manual states that "the actual images are visually compared" - what does this mean?

[DigitalVolcano]

It means the image pixels are compared (or an approximation thereof) rather than just the raw file binary information as used in Regular mode.

[avinatbezeq]

Thank you for your answer. So, is this a "brute force", simple comparison? A 80% value means that 80% of the pixels have exactly the same value? Nothing like the solutions mentioned on this stack overflow "image comparison - fast algorithm" post?

[DigitalVolcano]

Almost,but it works more on averages -it doesn't compare pixel-for-pixel unless you select 'Exact Match'

Looking at adding other algorithms for version 5 - this may align with some of the solutions you mentioned.