公开(公告)号：US08891897B2

公开(公告)日：2014-11-18

申请号：US13899222

申请日：2013-05-21

Applicant: Silicon Image, Inc.

Inventor： Dale Richard Adams ,  Laurence A. Thompson

IPC: G06K9/40 ,  H04N19/86 ,  G06T5/10 ,  G06T5/00 ,  G11B20/00

CPC classification number: G06T5/10 ,  G06T5/002 ,  G11B20/00007 ,  H04N19/117 ,  H04N19/136 ,  H04N19/865

Abstract: Systems and methods for block noise detection and filtering are disclosed. One embodiment includes, computing difference magnitudes in pixel values for adjacent pixels in the image. The difference magnitudes can include horizontal difference magnitudes for horizontally adjacent pixels and vertical difference magnitudes for vertically adjacent pixels. One embodiment further includes using normalized sums of the difference magnitudes to determine a set of noise characteristics of the block noise and a set of image characteristics of the image and configuring inputs to the block noise filter using the set of noise and image characteristics.

Abstract translation: 公开了用于块噪声检测和滤波的系统和方法。 一个实施例包括：计算图像中相邻像素的像素值中的差异幅度。 差异幅度可以包括水平相邻像素的水平差幅度和垂直相邻像素的垂直差幅度。 一个实施例还包括使用差分幅度的归一化和来确定块噪声的一组噪声特性和图像的一组图像特性，并且使用该组噪声和图像特性来配置对块噪声滤波器的输入。