1. A method of storing an object detected in a video clip in a multi-dimensional content database, the method comprising: generating a shape signature using multi-bit histogram bins reduced to single bit histogram bins in sectored rings around a keypoint of an object detected in a frame of the video clip; and storing data associated with the object in the video clip at a leaf node of the multi-dimensional content database having a plurality of leaf nodes, wherein the shape signature is used as an address to access the data associated with the object in the video clip from the leaf node.
3. The method of claim 1 , further comprising: combining multi-dimensional signatures from two selected frames in the video clip as a single combined shape signature, wherein the single combined shape signature is unique and distinguishable from signatures generated from an individual frame to identify the video clip from a large set of video clips.