...practice, everything is the other way around. Smartphone wide-angle cameras always introduce natural distortions: edges slightly warp, perspective curvature appears, the plane is never mathematically perfect. But when the document lies dead flat, like under a ruler — it immediately screams...

PERFECT PERSPECTIVE IS ALMOST ALWAYS A DEATH SENTENCE ▪ Think if the document lies perfectly flat and everything is “level” it’ll be fine? Most of the time, that’s exactly what gives away the fake. Real smartphones, especially wide-angle cameras, always add natural distortions: - Slight...