| 摘要 |
A noise reduction apparatus in which decoded image data is input to a block division circuit which divides the input image into blocks each consisting of NxN pixels. A process block determination circuit determines the presence/absence of an edge from estimated values of four corner points of an objective block divided by the block division circuit. The process block determination circuit determines the size of a process block in accordance with the determination result. A linear interpolation circuit performs linear interpolation of the process block determined by the process block determination circuit, and outputs corrected image data.
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