This invention describes a way to print digital photographs that also include invisible coded data on their surface. This coded data, along with reference points, allows a special optical device to read it and understand its position relative to the photo. This enables various functions, such as using the device to point at the photo and request another copy to be printed, or archiving a digital version separately.
Why it matters: Filed before smartphones with high-resolution cameras and advanced computer vision were ubiquitous. Today, a phone's camera can act as the optical sensing device, interpreting printed coded data and triggering functions, making the interactive aspect far more accessible.
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