
https://sfconservancy.org/blog/2022/jun/30/give-up-github-launch/
The concept of “blink comparison” method is simple – the app allows you to quickly switch pictures without delay so you can see the differences.
“Blink comparison” (Wikipedia) method uses high efficiency pattern recognition by human eyes, to permit quick verification between a reference picture and an actual one being taken on the spot. For example, in the goal of detecting tampering in high contrast nail polish tamper-evident seals.
Relative documentation on the tamper-evident glitter nail polish seals concept and why it is hard to beat: