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    • 42. 发明授权
    • Method of edge direction detection based on the correlation between pixels of a vector and an edge direction detection system
    • 基于向量和边缘方向检测系统的像素之间的相关性的边缘方向检测方法
    • US07474789B2
    • 2009-01-06
    • US11387482
    • 2006-03-22
    • Xianglin WangYeong-Taeg Kim
    • Xianglin WangYeong-Taeg Kim
    • G06K9/48H04N7/01
    • H04N7/012G06T3/403G06T7/12G06T7/74G06T2207/10016
    • A method for edge direction detection at a selected pixel on a center-line between two lines of an image includes defining two vectors using certain pixels on the two lines. A vector norm is defined which gives an indication of the correlation of between pixels of one vector and pixels of the other vector. If a vertical vector norm value indicates a low correlation in the vertical direction, then it can be assumed that the selected pixel is in a non-vertical edge area. Vector norm values associated with small angles from the vertical direction are used to determine candidate directions for the non-vertical edge. If a candidate direction is verified as being a preferred direction, then a direction-fine tuning process is performed in which vector norm values associated with big angles from the vertical direction are calculated in order to find a more accurate direction for the non-vertical edge.
    • 在图像的两行之间的中心线上的选定像素处的边缘方向检测的方法包括使用两条线上的某些像素定义两个向量。 定义了向量范数,其给出了一个向量的像素与另一个矢量的像素之间的相关性的指示。 如果垂直矢量范数值表示垂直方向上的低相关性,则可以假设所选择的像素处于非垂直边缘区域。 使用与垂直方向的小角度相关联的矢量范数值来确定非垂直边缘的候选方向。 如果候选方向被验证为优选方向,则执行方向微调处理,其中计算与垂直方向的大角度相关联的向量范数值,以便为非垂直边缘找到更准确的方向 。
    • 44. 发明申请
    • REFERENCE PICTURE MARKING IN SCALABLE VIDEO ENCODING AND DECODING
    • 可扩展视频编码和解码中的参考图片标记
    • US20070223575A1
    • 2007-09-27
    • US11691467
    • 2007-03-26
    • Ye-Kui WangMiska HannukselaXianglin Wang
    • Ye-Kui WangMiska HannukselaXianglin Wang
    • H04B1/66H04N7/12
    • H04N19/34H04N19/31H04N19/423H04N19/573H04N19/58H04N19/61H04N19/70
    • A device, an encoding method, and a decoding method enable a separate marking of base representations and enhanced representations of key access units to save memory or to allow a better scalable video coding optimization. The encoding method of a sequence of original pictures to a sequence of access units includes, after encoding of one of the access units, storing a first decoded picture of the first encoded picture and a second decoded picture of the second encoded picture for inter prediction for encoding of others of the access units; and identifying the first decoded picture and the second decoded picture to be no longer used for inter prediction. The decoding method includes decoding the first access unit, where a first decoded picture is decoded from the first picture and a second decoded picture is decoded from the second picture; marking the first and second decoded pictures as used for inter prediction; decoding the second access unit; and marking one of the first and second decoded pictures as no longer used for inter prediction.
    • 一种设备,编码方法和解码方法能够分别标记基本表示和密钥访问单元的增强表示以节省存储器或允许更好的可扩展视频编码优化。 原始图像序列到接入单元序列的编码方法包括:在编码一个访问单元之后,存储第一编码图像的第一解码图像和用于帧间预测的第二编码图像的第二解码图像 对其他访问单元的编码; 并且识别第一解码图像和第二解码图像不再用于帧间预测。 解码方法包括对第一存取单元进行解码,其中第一解码图像从第一图像解码,第二解码图像从第二图像解码; 标记用于帧间预测的第一和第二解码图像; 解码第二存取单元; 并且将第一和第二解码图像中的一个标记为不再用于帧间预测。
    • 49. 发明授权
    • Image detail enhancement system
    • 图像细节增强系统
    • US07110044B2
    • 2006-09-19
    • US10402280
    • 2003-03-27
    • Xianglin WangYeong-Taeg Kim
    • Xianglin WangYeong-Taeg Kim
    • H04N5/20
    • H04N5/205
    • A detail enhancement system uses a detail filter bank including multiple detail filters covering different frequency ranges. An input video signal representing a digital image is processed in the detail filter, wherein detail signals are extracted by the detail filters at different frequency ranges. Shoot suppression blocks and coring blocks are provided for each detail filter to prevent overshoot/undershoot artifacts and small ringing artifacts, respectively. The overall detail signal is amplitude scaled, and added back to the input signal as an enhancement, to generate a detail enhanced output signal.
    • 细节增强系统使用细节滤波器组,其包括覆盖不同频率范围的多个细节滤波器。 表示数字图像的输入视频信号在细节滤波器中被处理,其中由不同频率范围的细节滤波器提取细节信号。 为每个细节过滤器提供拍摄抑制块和取芯块,以分别防止过冲/下冲伪像和小的振铃伪影。 总体细节信号被幅度缩放,并作为增强加回到输入信号,以产生细节增强的输出信号。