Image analysis – Image compression or coding – Interframe coding
Patent
1994-10-17
1997-02-18
Boudreau, Leo
Image analysis
Image compression or coding
Interframe coding
382303, 382308, 348407, G06K 936
Patent
active
056048211
ABSTRACT:
Circuit architecture for dynamic scene analysis uses a difference picture based technique wherein pixel values corresponding to the same position from previous and current frames are inputted to the system during each clock cycle. The difference picture is input to a connected component labeling algorithm in order to obtain the various connected components in the difference picture. A Sobel edge detector is applied to previous and current frame pixel values, and the resulting data stored in a buffer so that for each pixel, the connected component label of the difference picture, the Sobel edge value in the current frame, and the Sobel edge value in the previous frame are stored. The buffer supplies the data to a series of motion detection processors which are arranged in a systolic array. An alternative arrangement is to arrange the motion detection processors in parallel in a pipeline fashion with no feedback logic. In any case, each processor analyzes a different region of the difference picture in order to detect and classify the type of motion occurring in that region. The difference picture generator, Sobel operators, connected components hardware and buffer, and motion detection processors can be implemented into a CMOS VLSI chip to obtain high speed and real time response.
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Mehrotra Rajiv
Ranganathan N.
Boudreau Leo
Kelley Chris
The University of South Florida
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