Techniques for identifying and reducing block artifacts
作者： Jorge E. Caviedes , Nilesh A. Ahuja
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摘要: Techniques are described that can be used to identify blocking artifacts in both vertical and horizontal directions. For a direction, gradient is determined for pixel. Gradient smoothing performed pixels the row of A ratio over determined. Any pixel with above threshold segment length exceeds as potentially having block artifacts. Each column have inspected determine whether number local maximum there sufficient column. Columns satisfy conditions considered include
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