you need high-res (40 MP) cameras, but that will be standard soon enough. the next step is to build a Scene graph out of every picture, and derive additional information from reflections, shadows cast, etc

crimes in which the victims are photographed, such as hostage taking or child sex abuse, reflections in the eyes of the photographic subject could help to identify perpetrators. Images of people retrieved from cameras seized as evidence during criminal investigations could be used to piece together networks of associates or to link individuals to particular locations. By zooming in on high-resolution passport-style photographs, researchers were able to recover bystander images that could be identified accurately by observers, despite their low resolution.

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