公开(公告)号：US20160029015A1

公开(公告)日：2016-01-28

申请号：US14486076

申请日：2014-09-15

Applicant: Ningbo University

Inventor： Gangyi Jiang ,  Yang Song ,  Shanshan Liu ,  Kaihui Zheng ,  Xin Jin

IPC: H04N17/00

CPC classification number: H04N17/004 ,  G06T7/0002 ,  G06T2207/10016 ,  G06T2207/20064 ,  G06T2207/30168

Abstract: A video quality evaluation method based on 3D wavelet transform utilizes 3D wavelet transform in the video quality evaluation, for transforming the group of pictures (GOP for short) of the video. By splitting the video sequence on a time axis, time-domain information of the GOPs is described, which to a certain extent solves a problem that the video time-domain information is difficult to be described, and effectively improves accuracy of objective video quality evaluation, so as to effectively improve relativity between the objective quality evaluation result and the subjective quality judged by the human eyes. For time-domain relativity between the GOPs, the method weighs the quality of the GOPs according to the motion intensity and the brightness, in such a manner that the method is able to better meet human visual characteristics.

Abstract translation: 基于3D小波变换的视频质量评估方法在视频质量评估中利用3D小波变换，对视频的图像组（简称为GOP）进行变换。 通过在时间轴上分割视频序列，描述了GOP的时域信息，这在一定程度上解决了难以描述视频时域信息的问题，并且有效地提高了客观视频质量评估的准确性 ，以有效提高客观质量评估结果与人眼判断主观素质之间的相关性。 对于GOP之间的时域相关性，该方法以使得该方法能够更好地满足人类视觉特征的方式根据运动强度和亮度来权衡GOP的质量。

公开(公告)号：US09836843B2

公开(公告)日：2017-12-05

申请号：US14949045

申请日：2015-11-23

Applicant: Ningbo University

Inventor： Mei Yu ,  Kaihui Zheng ,  Gangyi Jiang ,  Yang Song ,  Shanshan Liu

IPC: G06T7/00 ,  H04N17/00 ,  H04N13/00 ,  H04N19/597

CPC classification number: G06T7/55 ,  G06T7/0002 ,  G06T2207/10021 ,  G06T2207/30168 ,  H04N17/00 ,  H04N19/597 ,  H04N2013/0085

Abstract: A method for assessing an objective quality of a stereoscopic video based on reduced time-domain weighting, which considers a time domain perception redundant characteristic of human eyes during a video perception, includes steps of: through a motion intensity mean value and a motion intensity variance of an undistorted stereoscopic video and the motion intensity mean value and the motion intensity variance of each frame group, determining a motion intensity level of each frame group of the undistorted stereoscopic video; for the frame groups having different motion intensity levels, selecting undistorted reduced stereoscopic images through different frame extracting strategies with different densities; measuring a quality of a simultaneous distorted reduced stereoscopic image relative to the undistorted reduced stereoscopic image; through weighting each quality of the simultaneous distorted reduced stereoscopic image relative to the undistorted reduced stereoscopic image, obtaining a quality of a distorted stereoscopic video relative to the undistorted stereoscopic video.

公开(公告)号：US09460501B1

公开(公告)日：2016-10-04

申请号：US15054151

申请日：2016-02-26

Applicant: Ningbo University

Inventor： Gangyi Jiang ,  Yang Song ,  Zongju Peng ,  Fen Chen ,  Kaihui Zheng ,  Shanshan Liu

IPC: G06K9/00 ,  G06T7/00 ,  H04N13/00 ,  G06T7/20

CPC classification number: G06T7/0002 ,  G06T2207/10021 ,  G06T2207/10028 ,  G06T2207/20064 ,  G06T2207/30168 ,  H04N13/106 ,  H04N13/161 ,  H04N19/597 ,  H04N2013/0081 ,  H04N2013/0085

Abstract: An objective assessment method for a stereoscopic video quality based on a wavelet transform fuses brightness values of pixels in a left viewpoint image and a right viewpoint image of a stereoscopic image in a manner of binocular brightness information fusion, and obtains a binocular fusion brightness image of the stereoscopic image. The manner of binocular brightness information fusion overcomes a difficulty in assessing a stereoscopic perception quality of a stereoscopic video quality assessment to some extent and effectively increases an accuracy of a stereoscopic video objective quality assessment. When weighing qualities of each frame group in a binocular fusion brightness image video corresponding to a distorted stereoscopic video, the objective assessment method fully considers a sensitivity degree of a human eye visual characteristic to various types of information in the video, and determines a weight of each frame group based on a motion intensity and a brightness difference.

Abstract translation: 基于小波变换的立体视频质量的客观评估方法以双目亮度信息融合的方式融合立体图像的左视点图像和右视点图像中的像素的亮度值，获得双眼融合亮度图像 立体图像。 双眼亮度信息融合的方式克服了在某种程度上评估立体视觉质量评估的立体感知质量的困难，并且有效地增加了立体视频客观质量评估的准确性。 在对应于失真的立体视频的双目融合亮度图像视频中对每个帧组进行称重质量时，客观评估方法充分考虑视频中的各种类型的信息的人眼视觉特征的灵敏度，并且确定视频的重量 每个帧组基于运动强度和亮度差。

公开(公告)号：US20160301909A1

公开(公告)日：2016-10-13

申请号：US14949045

申请日：2015-11-23

Applicant: Ningbo University

Inventor： Mei Yu ,  Kaihui Zheng ,  Gangyi Jiang ,  Yang Song ,  Shanshan Liu

IPC: H04N13/00 ,  G06T7/00 ,  G06T7/20

CPC classification number: G06T7/55 ,  G06T7/0002 ,  G06T2207/10021 ,  G06T2207/30168 ,  H04N17/00 ,  H04N19/597 ,  H04N2013/0085

Abstract: A method for assessing an objective quality of a stereoscopic video based on reduced time-domain weighting, which considers a time domain perception redundant characteristic of human eyes during a video perception, includes steps of: through a motion intensity mean value and a motion intensity variance of an undistorted stereoscopic video and the motion intensity mean value and the motion intensity variance of each frame group, determining a motion intensity level of each frame group of the undistorted stereoscopic video; for the frame groups having different motion intensity levels, selecting undistorted reduced stereoscopic images through different frame extracting strategies with different densities; measuring a quality of a simultaneous distorted reduced stereoscopic image relative to the undistorted reduced stereoscopic image; through weighting each quality of the simultaneous distorted reduced stereoscopic image relative to the undistorted reduced stereoscopic image, obtaining a quality of a distorted stereoscopic video relative to the undistorted stereoscopic video.

Abstract translation: 一种在视频感知期间考虑人眼的时域感知冗余特性的基于减小的时域加权来评估立体视频的客观质量的方法包括以下步骤：通过运动强度平均值和运动强度方差 确定不失真立体视频的每个帧组的运动强度水平;以及运动强度平均值和每个帧组的运动强度方差， 对于具有不同运动强度级别的帧组，通过具有不同密度的不同帧提取策略选择未失真的缩小立体图像; 测量相对于未失真的缩小立体图像的同时失真的缩小的立体图像的质量; 通过对相对于未失真的减少立体图像的同时失真的缩小立体图像的每个质量进行加权，获得相对于未失真立体视频的失真立体视频的质量。

公开(公告)号：US20160300339A1

公开(公告)日：2016-10-13

申请号：US15054151

申请日：2016-02-26

Applicant: Ningbo University

Inventor： Gangyi Jiang ,  Yang Song ,  Zongju Peng ,  Fen Chen ,  Kaihui Zheng ,  Shanshan Liu

IPC: G06T7/00 ,  G06T7/20 ,  H04N13/00

CPC classification number: G06T7/0002 ,  G06T2207/10021 ,  G06T2207/10028 ,  G06T2207/20064 ,  G06T2207/30168 ,  H04N13/106 ,  H04N13/161 ,  H04N19/597 ,  H04N2013/0081 ,  H04N2013/0085

Abstract: An objective assessment method for a stereoscopic video quality based on a wavelet transform fuses brightness values of pixels in a left viewpoint image and a right viewpoint image of a stereoscopic image in a manner of binocular brightness information fusion, and obtains a binocular fusion brightness image of the stereoscopic image. The manner of binocular brightness information fusion overcomes a difficulty in assessing a stereoscopic perception quality of a stereoscopic video quality assessment to some extent and effectively increases an accuracy of a stereoscopic video objective quality assessment. When weighing qualities of each frame group in a binocular fusion brightness image video corresponding to a distorted stereoscopic video, the objective assessment method fully considers a sensitivity degree of a human eye visual characteristic to various types of information in the video, and determines a weight of each frame group based on a motion intensity and a brightness difference.