Efficient scrambling of regions of interests in an image or video to preserve privacy

摘要

A smart video surveillance system comprising:at least one video surveillance system including a video surveillance camera system for capturing video signals representing video scenes and coding said video signals in accordance with a predetermined video format defining coded video signals and a server for storing and processing said coded video signals; the video surveillance system configured to capture and analyze said video signals and identify regions of interest within said video scenes by specifying for each pixel whether it is in the regions of interest or in the background, and scramble said regions of interest within said captured video scenes using the JPEG 2000 max-shift method for region of interest coding in order to scramble only the pixels of the regions of interest, said video signals representing said video scenes including the scrambled content to be decoded and played back by way of a decoder configured to decode said video signals in said predetermined video format without descrambling the pixels of said regions of interest, wherein said video surveillance system is configured to scramble using a JPEG 2000 implicit approach for region of interest encoding, in order to include in the region of interest all the code-blocks from resolution levels being lower than a chosen threshold.