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1. WO2020062898 - VIDEO FOREGROUND TARGET EXTRACTION METHOD AND APPARATUS

Publication Number WO/2020/062898
Publication Date 02.04.2020
International Application No. PCT/CN2019/088278
International Filing Date 24.05.2019
IPC
H04N 5/272 2006.01
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
NPICTORIAL COMMUNICATION, e.g. TELEVISION
5Details of television systems
222Studio circuitry; Studio devices; Studio equipment
262Studio circuits, e.g. for mixing, switching-over, change of character of image, other special effects
272Means for inserting a foreground image in a background image, i.e. inlay, outlay
G06T 7/194 2017.01
GPHYSICS
06COMPUTING; CALCULATING OR COUNTING
TIMAGE DATA PROCESSING OR GENERATION, IN GENERAL
7Image analysis
10Segmentation; Edge detection
194involving foreground-background segmentation
CPC
G06K 9/00744
GPHYSICS
06COMPUTING; CALCULATING; COUNTING
KRECOGNITION OF DATA; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
9Methods or arrangements for reading or recognising printed or written characters or for recognising patterns, e.g. fingerprints
00624Recognising scenes, i.e. recognition of a whole field of perception; recognising scene-specific objects
00711Recognising video content, e.g. extracting audiovisual features from movies, extracting representative key-frames, discriminating news vs. sport content
00744Extracting features from the video content, e.g. video "fingerprints", or characteristics, e.g. by automatic extraction of representative shots or key frames
G06T 7/13
GPHYSICS
06COMPUTING; CALCULATING; COUNTING
TIMAGE DATA PROCESSING OR GENERATION, IN GENERAL
7Image analysis
10Segmentation; Edge detection
13Edge detection
G06T 7/136
GPHYSICS
06COMPUTING; CALCULATING; COUNTING
TIMAGE DATA PROCESSING OR GENERATION, IN GENERAL
7Image analysis
10Segmentation; Edge detection
136involving thresholding
G06T 7/155
GPHYSICS
06COMPUTING; CALCULATING; COUNTING
TIMAGE DATA PROCESSING OR GENERATION, IN GENERAL
7Image analysis
10Segmentation; Edge detection
155involving morphological operators
G06T 7/194
GPHYSICS
06COMPUTING; CALCULATING; COUNTING
TIMAGE DATA PROCESSING OR GENERATION, IN GENERAL
7Image analysis
10Segmentation; Edge detection
194involving foreground-background segmentation
G06T 7/90
GPHYSICS
06COMPUTING; CALCULATING; COUNTING
TIMAGE DATA PROCESSING OR GENERATION, IN GENERAL
7Image analysis
90Determination of colour characteristics
Applicants
  • 惠州学院 HUIZHOU UNIVERSITY [CN]/[CN]
Inventors
  • 蔡昭权 CAI, Zhaoquan
  • 蔡映雪 CAI, Yingxue
  • 陈伽 CHEN, Jia
  • 胡松 HU, Song
  • 黄思博 HUANG, Sibo
  • 李慧 LI, Hui
  • 胡辉 HU, Hui
  • 陈明阳 CHEN, Mingyang
Agents
  • 北京中济纬天专利代理有限公司 BEIJING WITAL PATENT AGENCY LTD.
Priority Data
PCT/CN2018/10751426.09.2018CN
Publication Language Chinese (ZH)
Filing Language Chinese (ZH)
Designated States
Title
(EN) VIDEO FOREGROUND TARGET EXTRACTION METHOD AND APPARATUS
(FR) PROCÉDÉ ET APPAREIL D'EXTRACTION DE CIBLE D'AVANT-PLAN D'UNE VIDÉO
(ZH) 一种视频前景目标提取方法及装置
Abstract
(EN)
Disclosed are a video foreground target extraction method and apparatus. In the method, firstly, a transparency estimation value is recalculated by measuring the reliability of foreground and background pixel pairs to obtain a first transparency mask of the first image; then, a new picture is generated by superposing grayscale information and a second transparency mask of the first image is obtained, and the first transparency mask of the first image is further modified, finally, the foreground object of a certain frame of image in a video is extracted by using the modified first transparency mask. The present disclosure can comprehensively use the reliability and grayscale information of the foreground and background pixel pairs in a certain frame of image in the video, and provides a new video foreground target extraction solution.
(FR)
L'invention concerne un procédé et un appareil d'extraction de cible d'avant-plan d'une vidéo. Dans le procédé, tout d'abord, une valeur d'estimation de transparence est recalculée en mesurant la fiabilité de paires de pixels d'avant-plan et d'arrière-plan afin d'obtenir un premier masque de transparence de la première image ; ensuite, une nouvelle image est générée en superposant des informations d'échelle des gris et un second masque de transparence de la première image est obtenu, et le premier masque de transparence de la première image est en outre modifié, enfin, l'objet d'avant-plan d'une certaine trame d'image dans une vidéo est extrait en utilisant le premier masque de transparence modifié. La présente invention peut utiliser de manière complète les informations de fiabilité et d'échelle des gris des paires de pixels d'avant-plan et d'arrière-plan dans une certaine trame d'image dans la vidéo, et fournit une nouvelle solution d'extraction de cible d'avant-plan d'une vidéo.
(ZH)
本公开揭示一种视频前景目标提取方法及装置,其方法首先通过度量前景背景像素对的可信度重新计算透明度估计值以获得第一图像的第一透明度遮罩,然后通过叠加灰度信息来生成新图片并获得第一图像的第二透明度遮罩,并进一步修正第一图像的第一透明度遮罩,最后利用修正的所述第一透明度遮罩将视频中某一帧图像的前景目标提取出来。本公开能够综合利用视频中某一帧图像中前景背景像素对的可信度和灰度信息,提供一种新的视频前景目标提取的方案。
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