Patent ID: 7646437

Claim:
A method of detecting at least one of a pan and a zoom in a video sequence, comprising: selecting a set of frames from a video sequence from an image database; determining a set of motion vectors for each frame in the set of frames using a motion analysis block executed by a processor; determining a motion angle for each motion vector using the motion analysis block; identifying at least two largest regions in each frame using a look-ahead detector executed by the processor, wherein the first largest region includes motion vectors with substantially similar motion angles and occupies a largest number of pixels in a frame and the second largest region includes motion vectors with substantially similar motion angles and occupies a second largest number of pixels in a frame; determining percentages of each frame covered by each of the at least two largest regions using the look-ahead detector; determining a statistical measure of the motion angles for at least one of the two largest regions using the look-ahead detector; and comparing the percentages and statistical measure to threshold values to identify at least one of a pan and a zoom in the video sequence using the look-ahead detector.