| 摘要 |
An apparatus and a method to smooth an input image are provided. A filter kernel mask is determined according to detected pattern information of the input image and applies a non-linear filtering to the input image. One or more masks each having a predetermined pattern are used to detect the pattern information of an input image, a similarity between the input image and each of the one or more masks is measured, a mask that is most appropriate for the input image is determined according to the measured similarity, and a non-linear filtering is applied using the determined mask. Since a noise measurement according to an input image is not required, a problem of a noise measurement value varying according to characteristics of a video signal may be avoided. Further, since a non-linear filtering is applied, it is possible to conserve edge information of the input image.
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