MULTI-PASS ALGORITHM TO REDUCE RINGING ARTIFACTS IN NOISE REMOVAL AND DEBLUR EFFECTS

摘要

A multi-pass algorithm to reduce ringing artifacts in image processing, e.g. from noise removal and deblur effects, is described. One embodiment includes processes: forming a matte of areas in an original image around strong edges to produce an edgeMatte image, e.g. by using an edge detection algorithm to find edges and dilating the detected lines using a matte dilation technique; producing an originalNoEdges image without any of the strong edges; running an image processing algorithm, e.g. denoise or deblur algorithm, on the originalNoEdges image to produce a resultNoEdges image; running the image processing algorithm on the original image to produce a resultWithRinging image; selectively combining the resultNoEdges image and the resultWithRinging image using the edgeMatte image.