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1. (WO2017092305) METHOD AND APPARATUS FOR ADJUSTING IMAGE QUALITY OF VIDEO
Latest bibliographic data on file with the International Bureau

Pub. No.: WO/2017/092305 International Application No.: PCT/CN2016/088650
Publication Date: 08.06.2017 International Filing Date: 05.07.2016
IPC:
H04N 21/234 (2011.01) ,H04N 21/44 (2011.01) ,H04N 21/485 (2011.01)
H ELECTRICITY
04
ELECTRIC COMMUNICATION TECHNIQUE
N
PICTORIAL COMMUNICATION, e.g. TELEVISION
21
Selective content distribution, e.g. interactive television, VOD [Video On Demand]
20
Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
23
Processing of content or additional data; Elementary server operations; Server middleware
234
Processing of video elementary streams, e.g. splicing of video streams or manipulating MPEG-4 scene graphs
H ELECTRICITY
04
ELECTRIC COMMUNICATION TECHNIQUE
N
PICTORIAL COMMUNICATION, e.g. TELEVISION
21
Selective content distribution, e.g. interactive television, VOD [Video On Demand]
40
Client devices specifically adapted for the reception of, or interaction with, content, e.g. STB [set-top-box]; Operations thereof
43
Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronizing decoder's clock; Client middleware
44
Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream or rendering scenes according to MPEG-4 scene graphs
H ELECTRICITY
04
ELECTRIC COMMUNICATION TECHNIQUE
N
PICTORIAL COMMUNICATION, e.g. TELEVISION
21
Selective content distribution, e.g. interactive television, VOD [Video On Demand]
40
Client devices specifically adapted for the reception of, or interaction with, content, e.g. STB [set-top-box]; Operations thereof
47
End-user applications
485
End-user interface for client configuration
Applicants:
乐视控股(北京)有限公司 LE HOLDINGS (BEIJING) CO., LTD. [CN/CN]; 中国北京市 朝阳区姚家园路105号3号楼10层1102 Room 1102, 10 Floor,Building 3, 105 Yaojiayuan Road, ChaoYang District Beijing 100025, CN
乐视云计算有限公司 LECLOUD COMPUTING CO., LTD. [CN/CN]; 中国北京市 朝阳区姚家园路105号观湖国际大厦1号楼15层 15 Floor, Building 1 Guan Hu Guo Ji, 105 Yaojiayuan Road, Chaoyang District Beijing 100025, CN
Inventors:
刘阳 LIU, Yang; CN
魏伟 WEI, Wei; CN
白茂生 BAI, Maosheng; CN
蔡砚刚 CAI, Yangang; CN
Agent:
北京国昊天诚知识产权代理有限公司 CO-HORIZON INTELLECTUAL PROPERTY INC.; 中国北京市 朝阳区小关北里甲2号渔阳置业大厦B座605 Suite 605, B Block, Yuyang Mansion, No.2, Xiaoguanbeili, Chaoyang District Beijing 100029, CN
Priority Data:
201510867210.501.12.2015CN
Title (EN) METHOD AND APPARATUS FOR ADJUSTING IMAGE QUALITY OF VIDEO
(FR) PROCÉDÉ ET APPAREIL DESTINÉS AU RÉGLAGE DE LA QUALITÉ D'IMAGE D'UNE VIDÉO
(ZH) 视频画质的调整方法和装置
Abstract:
(EN) A method and apparatus for adjusting the image quality of a video. The method comprises: according to a grayscale image of a current video frame, acquiring a brightness histogram of the current video frame; according to the brightness histogram of the current video frame, acquiring the number of left pixel points, the number of right pixel points and the number of pixel points, which are averaged into three parts, of the brightness histogram; according to the number of left pixel points and the number of right pixel points of the brightness histogram, adjusting the brightness of the current video frame; and according to the number of pixel points which are averaged into three parts, adjusting the contrast of the current video frame. The method and apparatus can automatically adjust the brightness and the contrast of an output video according to the image quality of an input video so as to enhance watching experience.
(FR) La présente invention concerne un procédé et un appareil destinés au réglage de la qualité d'image d'une vidéo. Le procédé comprend les étapes suivantes : conformément à une image à niveaux de gris d'une image vidéo actuelle, acquérir un histogramme de luminosité de l'image vidéo actuelle; conformément à l'histogramme de luminosité de l'image vidéo actuelle, acquérir le nombre de points de pixel gauche, le nombre de points de pixel droit et le nombre de points de pixel, lesquels sont moyennés en trois parties, de l'histogramme de luminosité; conformément au nombre de points de pixel gauche et au nombre de points de pixel droit de l'histogramme de luminosité, régler la luminosité de l'image vidéo actuelle; et conformément au nombre de points de pixel qui sont moyennés en trois parties, régler le contraste de l'image vidéo actuelle. Le procédé et l'appareil peuvent régler automatiquement la luminosité et le contraste d'une vidéo de sortie conformément à la qualité d'image d'une vidéo d'entrée de façon à améliorer le confort de visualisation.
(ZH) 一种视频画质的调整方法和装置,其中,所述方法包括根据当前视频帧的灰度图像,获取所述当前视频帧的亮度直方图,根据所述当前视频帧的亮度直方图,获取所述亮度直方图左侧像素点个数和右侧像素点个数以及平均3份的像素点个数;根据所述亮度直方图左侧像素点个数和右侧像素点个数调整所述当前视频帧的亮度,根据所述平均3份的像素点个数调整所述当前视频帧的对比度。能够实现根据输入视频的画质自动调整输出视频的亮度及对比度,从而提升观看体验。
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Designated States: AE, AG, AL, AM, AO, AT, AU, AZ, BA, BB, BG, BH, BN, BR, BW, BY, BZ, CA, CH, CL, CN, CO, CR, CU, CZ, DE, DK, DM, DO, DZ, EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, GT, HN, HR, HU, ID, IL, IN, IR, IS, JP, KE, KG, KN, KP, KR, KZ, LA, LC, LK, LR, LS, LU, LY, MA, MD, ME, MG, MK, MN, MW, MX, MY, MZ, NA, NG, NI, NO, NZ, OM, PA, PE, PG, PH, PL, PT, QA, RO, RS, RU, RW, SA, SC, SD, SE, SG, SK, SL, SM, ST, SV, SY, TH, TJ, TM, TN, TR, TT, TZ, UA, UG, US, UZ, VC, VN, ZA, ZM, ZW
African Regional Intellectual Property Organization (ARIPO) (BW, GH, GM, KE, LR, LS, MW, MZ, NA, RW, SD, SL, ST, SZ, TZ, UG, ZM, ZW)
Eurasian Patent Organization (AM, AZ, BY, KG, KZ, RU, TJ, TM)
European Patent Office (AL, AT, BE, BG, CH, CY, CZ, DE, DK, EE, ES, FI, FR, GB, GR, HR, HU, IE, IS, IT, LT, LU, LV, MC, MK, MT, NL, NO, PL, PT, RO, RS, SE, SI, SK, SM, TR)
African Intellectual Property Organization (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, GW, KM, ML, MR, NE, SN, TD, TG)
Publication Language: Chinese (ZH)
Filing Language: Chinese (ZH)