Detecting block artifacts in coded images and video
    23.
    发明授权
    Detecting block artifacts in coded images and video 有权
    检测编码图像和视频中的块伪影

    公开(公告)号:US08879001B2

    公开(公告)日:2014-11-04

    申请号:US12448636

    申请日:2007-12-21

    摘要: A method is provided for block artifact detection and block artifact determination using multiple features in coded images and video. A method includes identifying a plurality of overlapping blocks in a picture with respect to a current block. Each of the plurality of overlapping blocks covers a portion of the current block and a portion of an adjacent block. The method further includes transforming at least one of the plurality of overlapping blocks into respective coefficients corresponding to at least one of a luminance component and a chrominance component. The method also includes identifying a block artifact for the at least one of the plurality of overlapping blocks when coefficients corresponding to the at least one of the plurality of overlapping blocks are larger than a predefined value.

    摘要翻译: 提供了一种用于块伪影检测和使用编码图像和视频中的多个特征的块伪像确定的方法。 一种方法包括相对于当前块识别图片中的多个重叠块。 多个重叠块中的每一个覆盖当前块的一部分和相邻块的一部分。 该方法还包括将多个重叠块中的至少一个重新变换成对应于亮度分量和色度分量中的至少一个的相应系数。 当与多个重叠块中的至少一个重叠块相对应的系数大于预定值时,该方法还包括识别多个重叠块中的至少一个的块伪像。

    Banding artifact detection in digital video content
    25.
    发明授权
    Banding artifact detection in digital video content 有权
    数字视频内容中的伪影检测

    公开(公告)号:US08532198B2

    公开(公告)日:2013-09-10

    申请号:US12448184

    申请日:2007-12-19

    IPC分类号: H04N7/12 H04N11/02 H04N11/04

    摘要: A method and system for identifying and determining banding artifacts in digital video content composed of a sequence of moving video pictures includes creating a mask image corresponding to a picture from said sequence of moving video pictures based on global gradient changes to detect potential areas containing banding artifacts. The values of the mask image are scaled thereby making banding artifact detection possible using gradient operators. The banding artifacts are then identified/detected based on the local gradients.

    摘要翻译: 用于识别和确定由运动视频图像序列组成的数字视频内容中的条带伪影的方法和系统包括基于全局梯度变化从所述运动视频图像序列创建与图像相对应的掩模图像,以检测包含条带伪影的潜在区域 。 掩模图像的值被缩放,从而可以使用梯度算子来进行带状伪影检测。 然后基于局部梯度来识别/检测带状伪影。

    INTER-VIEW PREDICTION
    28.
    发明申请
    INTER-VIEW PREDICTION 审中-公开
    视角预测

    公开(公告)号:US20100142614A1

    公开(公告)日:2010-06-10

    申请号:US12451034

    申请日:2008-04-23

    IPC分类号: H04N7/26 H04N7/24

    摘要: At least one disclosed method and apparatus relate to inter-view prediction with different resolution reference picture. A particular method includes accessing at least a portion of an encoded picture (614), the encoded picture being from a particular view of multiple views, and the portion being encoded at a particular resolution. The method further includes determining a particular view level based on the particular view (614), determining the particular resolution based on the particular view level (606), and decoding the portion based on the particular resolution (630).

    摘要翻译: 至少一个公开的方法和装置涉及具有不同分辨率参考图片的视图间预测。 特定方法包括访问编码图像(614)的至少一部分,编码图像来自多个视图的特定视图,并且以特定分辨率编码的部分。 该方法还包括基于特定视图(614)确定特定视图级别,基于特定视图级别确定特定分辨率(606),以及基于特定分辨率对该部分进行解码(630)。

    Picture identification for multi-view video coding
    29.
    发明申请
    Picture identification for multi-view video coding 审中-公开
    多视点视频编码的图像识别

    公开(公告)号:US20100027615A1

    公开(公告)日:2010-02-04

    申请号:US12311593

    申请日:2007-10-11

    IPC分类号: H04N7/12 G06K9/68

    摘要: According to a general aspect, a picture from a first view, a picture from a second view, and dependency information are accessed. The dependency information describes one or more inter-view dependency relationships for the picture from the first view. Based on the dependency information, it is determined whether the picture from the first view is a reference picture for the picture from the second view. One application area involves determining whether pictures in a decoded picture buffer are reference pictures for pictures that have not yet been decoded. The pictures in the buffer may be marked to indicate whether they continue to be needed as inter-view reference pictures.

    摘要翻译: 根据一般方面,访问第一视图的图片,来自第二视图的图片和依赖性信息。 依赖性信息描述了从第一视图的图片的一个或多个视图间依赖关系。 基于相关性信息,从第二视图确定来自第一视图的图片是否是用于图片的参考图片。 一个应用领域涉及确定解码图像缓冲器中的图像是否尚未被解码的图像的参考图像。 可以标记缓冲器中的图像,以指示它们是否作为视图间参考图像继续需要。