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Method and device for detection of moving points in a television image for digital television systems providing bit-rate compression, with conditional-replenishment
Method and device for detection of moving points in a television image for digital television systems providing bit-rate compression, with conditional-replenishment
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机译:用于在具有条件补给的情况下为提供比特率压缩的数字电视系统检测电视图像中运动点的方法和设备
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摘要
The method consists in computing a luminance and/or chrominance gradient indicator (I.sub.g) at each point of the image, in computing a threshold value (S(X.sub.o)) as a function of each gradient obtained, in measuring the inter-image luminance and/or chrominance difference of each point of the image, in comparing the inter-image difference obtained at each point with the corresponding computed threshold value, in applying the result of the comparison to the input of a density-filtering device in order to detect the density of moving points in proximity to each scanned point and to compare the density obtained in respect of each point with a predetermined density threshold value in order to provide an indication of moving points when the density at each point considered exceeds the predetermined density threshold value.
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