Abstract: Techniques for extracting keys from digital images data are presented. In an embodiment, a method comprises receiving a particular image; using a computer, determining a plurality of characteristics specific to contents of the particular image; using the computer, generating, based at least in part on the plurality of characteristics, a plurality of coefficients; generating a plurality of values by applying a particular function to the plurality of coefficients; selecting, from the plurality of values, a subset of values, each value in the subset satisfying a particular threshold requirement; based, at least in part on the subset of values, generating one or more keys, each of which uniquely encodes data included in the subset of values; generating and storing metadata that associates each of the one or more keys with the particular image.

Abstract: A plug adaptor device and method for using the same, the device including anchor and clip components for attachment with electric cable plugs and/or wall (or floor) sockets or socket faceplates. Corresponding anchor and clip components are separately attachable to electric cable plugs or sockets and used to secure plug to plug or plug to socket connections. The components are engaged by sliding the toe portion of the clip over the anchor so that a claw protrusion fits snugly behind the inside edge of the anchor thus preventing the connected plugs (or plug and socket) from being accidentally disconnected. When engaged, the plug adaptor device provides enough resistance to an opposing pulling force to prevent accidental disconnections allowing disconnection with application of a reasonable amount of pulling force in emergency situations.