The practice of messages in the data underlying an image is called steganography. Steganographic encryption works by adding a small pattern as a layer over an image. Sometimes the pattern is invisible ...

Encoding images in photon correlations Simplified experimental setup (a). A conventional intensity image (b) reveals no information about the object, while a correlation image acquired using an ...

Increasingly, civilization’s information is stored digitally, and that storage is abundant and growing. We don't bother deleting those seven high-definition videos of the ceiling or 20 blurry photos ...