| 摘要 |
A process and a device operating in real time for identifying and localizing an area in relative movement in a scene and determining the speed and oriented direction of the relative movement in real time. The process carries out temporal processing of a digital video input signal S(PI) that includes deducing, from the variations between the value of each pixel in a frame and in the immediately preceding frame, a binary signal DP identifying whether or not there was a significant variation and a digital signal CO representing the magnitude of this variation, and a spatial processing including distributing in a matrix these two signals successively for a single frame that is scanned through the matrix, and deducing the required relative movement and its parameters from this matrix distribution. The device includes a temporal processing unit associated with a memory and a spatial processing unit associated with a delay unit, a clock unit and control unit to control the rate of operation of the temporal and spatial processing units.
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