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公开(公告)号：US10362215B2
公开(公告)日：2019-07-23
申请号：US15893692
申请日：2018-02-12
Applicant: Ningbo University
Inventor： Gangyi Jiang , Mei Yu , Shengli Fan , Yigang Wang
IPC: G02B21/22 , H04N5/232 , G06T7/593 , H04N5/235 , H04N5/238 , G02B21/36 , G02B21/26 , H04N13/271 , H04N13/275 , G02B21/00 , H04N13/246 , H04N13/239 , H04N13/00
Abstract: The present invention discloses a microscopic three-dimensional measurement system and method based on a moving diaphragm. The present invention adds the diaphragm into the existing optical microscopic imaging system to limit light irradiation angle during imaging for reducing the diameter of blur circle, which extends the depth of field and the depth measurement range, so as to achieve the three-dimensional measurement of large-size objects to be measured. Through changing the position of the added diaphragm, two images with different light incident directions are obtained, which is similar to binocular stereo vision, and then the disparity map is used to predict the depth, so as to carry out the 3D scene reconstruction. Since the depth of field of the imaging system is enlarged and the imaging model has certain non-linear characteristics, the present invention uses quadratic function to express the non-linearity, which reduces the measurement error.
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公开(公告)号：US10237576B2
公开(公告)日：2019-03-19
申请号：US15260302
申请日：2016-09-08
Applicant: Ningbo University
Inventor： Gangyi Jiang , Jing Wang , Yang Song , Hua Shao
IPC: H04N7/24 , H04N19/593 , H04N19/467 , H04N19/463 , H04N19/597 , H04N19/48 , H04N7/167 , H04N19/176
Abstract: The present invention disclosed a 3D-HEVC depth video information hiding method based on single-depth intra mode, which comprises information embedment part and information extraction part. During information embedment, if the pixels in the candidate list are equal using the encrypt information to modulate the index of the pixel and completes the embedment. If the pixels are different, judging the neighboring CU of the CU whose depth is 2 or 3 and modulating the index of the pixel to complete embedment of the hidden information. The advantage of the present invention is high security, low calculation complexity and small influence on data rate.
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公开(公告)号：US10210433B2
公开(公告)日：2019-02-19
申请号：US15698624
申请日：2017-09-07
Applicant: Ningbo University
Inventor： Gangyi Jiang , Yang Song , Fen Chen , Mei Yu
Abstract: A method for evaluating quality of tone-mapping image based on exposure analysis is provided, which explores the exposure properties on each area of the high dynamic range image utilizing the pre-exposure method and divides the high dynamic range image into three parts of an easy overexposed area, an easy underexposed area and an easy natural-exposed area, wherein different quality characteristics are extracted in different areas, which is capable of ensuring that the follow-up quality characteristic extraction is more targeted. The present invention takes the difference of distortion between the tone-mapping image and the conventional image into account, and extracts image characteristics such as the abnormal exposure rate, the underexposed residual energy, the overexposed residual energy and the exposure color index, so as to accurately reflect the quality degradation of the tone-mapping image.
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Patent Agency Ranking
24.发明申请公开(公告)号：US20180198972A1
公开(公告)日：2018-07-12
申请号：US15893692
申请日：2018-02-12
Applicant: Ningbo University
Inventor： Gangyi Jiang , Mei Yu , Shengli Fan , Yigang Wang
CPC classification number: H04N5/23212 , G02B21/0016 , G02B21/26 , G02B21/362 , G06T7/593 , G06T2200/08 , G06T2207/10056 , H04N5/23216 , H04N5/2354 , H04N5/238 , H04N13/239 , H04N13/246 , H04N13/271 , H04N13/275 , H04N2013/0081
Abstract: The present invention discloses a microscopic three-dimensional measurement system and method based on a moving diaphragm. The present invention adds the diaphragm into the existing optical microscopic imaging system to limit light irradiation angle during imaging for reducing the diameter of blur circle, which extends the depth of field and the depth measurement range, so as to achieve the three-dimensional measurement of large-size objects to be measured. Through changing the position of the added diaphragm, two images with different light incident directions are obtained, which is similar to binocular stereo vision, and then the disparity map is used to predict the depth, so as to carry out the 3D scene reconstruction. Since the depth of field of the imaging system is enlarged and the imaging model has certain non-linear characteristics, the present invention uses quadratic function to express the non-linearity, which reduces the measurement error.
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公开(公告)号：US20170372175A1
公开(公告)日：2017-12-28
申请号：US15698624
申请日：2017-09-07
Applicant: Ningbo University
Inventor： Gangyi Jiang , Yang Song , Fen Chen , Mei Yu
CPC classification number: G06K9/6269 , G06K9/036 , G06K9/4642 , G06K9/4652 , G06K9/4661 , G06T7/0002 , G06T2207/20076 , G06T2207/20081 , G06T2207/20208 , G06T2207/30168 , H04N1/00002 , H04N5/2355
Abstract: A method for evaluating quality of tone-mapping image based on exposure analysis is provided, which explores the exposure properties on each area of the high dynamic range image utilizing the pre-exposure method and divides the high dynamic range image into three parts of an easy overexposed area, an easy underexposed area and an easy natural-exposed area, wherein different quality characteristics are extracted in different areas, which is capable of ensuring that the follow-up quality characteristic extraction is more targeted. The present invention takes the difference of distortion between the tone-mapping image and the conventional image into account, and extracts image characteristics such as the abnormal exposure rate, the underexposed residual energy, the overexposed residual energy and the exposure color index, so as to accurately reflect the quality degradation of the tone-mapping image.
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26.发明授权公开(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.
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27.发明授权Objective assessment method for stereoscopic video quality based on wavelet transform 有权基于小波变换的立体视频质量目标评估方法公开(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
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。
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公开(公告)号：US20140029000A1
公开(公告)日：2014-01-30
申请号：US13859130
申请日：2013-04-09
Applicant: NINGBO UNIVERSITY
Inventor： Gangyi Jiang , Yigang Wang , Mei Yu , Zongju Peng , Feng Shao
IPC: G01M11/02
CPC classification number: G01M11/02 , G01M11/0264 , G01M11/0292 , G02B21/241
Abstract: A method for detecting a parfocality of a zoom-stereo microscope includes: acquiring four highest definitions corresponding to a plurality of images with a cooperation of four definition judging functions, acquiring a relatively clearest position according to the four highest definitions, comparing a definition in the relatively clearest position with a definition in a parfocal position to judge whether the relatively clearest position is the parfocal position, then adjusting a magnification of the zoom-stereo microscope to acquire the parfocal positions at a finite number of the discrete magnifications, and finally fitting a parfocal curve at the continuous magnifications. The method according to the present invention implements a parfocality detection of the stereo microscope automatically and effectively and increases a productivity, and has a high detecting precision. In addition, the method according to the present invention has a good robustness, so that users needn't intervene and adjust frequently.
Abstract translation: 一种用于检测变焦立体显微镜的分辨率的方法包括：通过四个定义判断功能的协作来获取对应于多个图像的四个最高定义，根据四个最高定义获取相对较清楚的位置，比较 相对较为清晰的位置，其中具有在焦点位置中的定义以判断相对较为清晰的位置是否是对焦位置，然后调整放大立体显微镜的放大倍率以在有限数量的离散放大倍率获取对焦位置，并且最后拟合 连续放大倍数的焦距曲线。 根据本发明的方法，自动而有效地实现了立体显微镜的parfocality检测，提高了生产率，检测精度高。 此外，根据本发明的方法具有良好的鲁棒性，使得用户不需要频繁地进行干预和调整。
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