| 摘要 |
A pixel filter comprising: an input 413 arranged to receive a sequence of pixels, each pixel having an associated pixel value; a filter module 405 arranged to perform a first recursive filter operation 402 in a first direction through the sequence of pixels so as to form a first filtered pixel value for each pixel, and perform a second recursive filter operation 403 in a second direction through the sequence of pixels so as to form a second filtered pixel value for each pixel, wherein the first and second recursive filter operations form a respective filtered pixel value for a given pixel in dependence on the pixel value at that pixel and the filtered pixel value preceding that pixel in their respective direction of operation, the filtered pixel value of the preceding pixel being scaled by a measure of similarity between data associated with that pixel and its preceding pixel; and filter logic 406 configured to, for each pixel of the sequence, combine the first and second filtered pixel values formed in respect of the pixel by the first and second recursive filter operations so as to generate a filter output for the pixel. |
