Passport Photo Rules: Sizes, Background, Lighting
The photo is the one part of a passport application that can fail before a human reads a single form field. Passport photo rules cover physical size, head position, background, lighting, and expression, and every country publishes its own numbers. The size part is pure geometry, which software handles well. The rest is judgment, which it doesn't. This article lays out how sizes differ by country, the requirements most authorities share, a worked example going from phone portrait to a US file and a print sheet, and exactly where the Passport Size Photo Maker's automation ends.