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    Estimation of block artifact strength based on edge statistics
    9.
    发明申请
    Estimation of block artifact strength based on edge statistics 失效
    基于边缘统计的块伪影强度估计

    公开(公告)号：US20070237241A1

    公开(公告)日：2007-10-11

    申请号：US11399846

    申请日：2006-04-06

    申请人： Victor Ha ,  Yeong-Taeg Kim ,  Sangkeun Lee

    发明人： Victor Ha ,  Yeong-Taeg Kim ,  Sangkeun Lee

    IPC分类号： H04B1/66 ,  G06K9/40

    CPC分类号： H04N19/86 ,  H04N19/107 ,  H04N19/117 ,  H04N19/176 ,  H04N19/44 ,  H04N19/60 ,  H04N19/61

    摘要： A method and apparatus estimates the strength of block artifacts in compressed video is described. Block artifacts are associated with the block-based image/video compression schemes. The block artifacts deteriorate the quality of compressed image and video, especially at low bit rates. A deblocking method measures the strength of the block artifacts at each block boundary and adjusts the deblocking parameters accordingly to improve the performance of the overall deblocking process. A method and device to measure the strength of block artifacts based on the global and local edge information of the current picture is provided.

    摘要翻译： 描述了一种方法和装置估计压缩视频中块伪影的强度。 块伪影与基于块的图像/视频压缩方案相关联。 块伪像恶化了压缩图像和视频的质量，特别是在低比特率下。 去块方法测量每个块边界处的块伪影的强度，并相应地调整去块参数，以提高整体去块过程的性能。 提供了一种基于当前图像的全局和局部边缘信息来测量块伪影强度的方法和装置。

    Content-adaptive block artifact removal in spatial domain
    10.
    发明申请
    Content-adaptive block artifact removal in spatial domain 失效
    空间域中的内容自适应块伪影去除

    公开(公告)号：US20070058726A1

    公开(公告)日：2007-03-15

    申请号：US11228726

    申请日：2005-09-15

    申请人： Victor Ha ,  Yeong-Taeg Kim

    发明人： Victor Ha ,  Yeong-Taeg Kim

    IPC分类号： H04N11/04 ,  H04B1/66

    CPC分类号： H04N19/117 ,  H04N19/137 ,  H04N19/14 ,  H04N19/176 ,  H04N19/61 ,  H04N19/86

    摘要： An image processing method and system removes block artifacts in compressed image/video. Block artifacts are detected based on content analysis performed based on knowledge of the contents of the image/video. Then, a set of priority conditions is evaluated to generate a detection decision for each pixel at the block boundary. A higher priority is given to a short-term temporal processing result and a spatial processing result. The long-term temporal processing result and quantization information are treated as auxiliary information to adjust the strength of filtering. Depending on the result of the detection decision, appropriate filtering is applied to the pixel to remove the block artifacts.

    摘要翻译： 图像处理方法和系统消除压缩图像/视频中的块伪影。 基于基于对图像/视频的内容的知识进行的内容分析来检测块伪像。 然后，评估优先级条件的集合，以生成块边界处的每个像素的检测决定。 对于短期时间处理结果和空间处理结果给予较高的优先级。 长期时间处理结果和量化信息被视为辅助信息以调整滤波强度。 根据检测决策的结果，对像素应用适当的滤波以去除块伪像。