公开(公告)号：US06728414B1

公开(公告)日：2004-04-27

申请号：US09353058

申请日：1999-07-13

申请人： Joon-ho Chang ,  Jeong-kwon Kim ,  Choong-woong Lee

发明人： Joon-ho Chang ,  Jeong-kwon Kim ,  Choong-woong Lee

IPC分类号： G06K940

CPC分类号： G06T5/20 ,  G06T5/002 ,  G06T2207/20192 ,  H04N19/117 ,  H04N19/136 ,  H04N19/176 ,  H04N19/18 ,  H04N19/44 ,  H04N19/60 ,  H04N19/80 ,  H04N19/85 ,  H04N19/86

摘要： A de-blocking method and apparatus in which a block classifier determines whether the received decoded image is a planar surface or a complex surface. A first correction value calculator calculates correction values for block boundary pixels using a first filtering coefficient when the decoded image is a planar surface, an interpolator provides first correction values for pixels on the block boundary, and a second correction value calculator calculates second correction values for some block boundary pixels using a second filtering coefficient when the decoded image is a complex surface. A corrector provides a corrected image by correcting the received decoded image using the first correction values when the received decoded image is a planar surface, or using the second correction values when the received decoded image is a complex surface. Blocking artifacts are effectively removed to prevent discontinuity between boundaries of the decoded image obtained by decoding a block-based coded image, while maintaining the edge and the texture of the image.

摘要翻译： 一种解块方法和装置，其中块分类器确定所接收的解码图像是平面表面还是复合表面。 当解码图像是平面时，第一校正值计算器使用第一滤波系数计算块边界像素的校正值，内插器为块边界上的像素提供第一校正值，第二校正值计算器计算第二校正值， 当解码图像是复杂表面时，使用第二滤波系数的一些块边界像素。 当接收到的解码图像是平面时，校正器通过使用第一校正值校正接收到的解码图像，或者当接收到的解码图像是复杂表面时使用第二校正值来提供校正图像。 有效地去除阻挡伪影，以防止通过解码基于块的编码图像而获得的解码图像的边界之间的不连续性，同时保持图像的边缘和纹理。