Title:
PANORAMIC IMAGE COMPRESSION METHOD AND APPARATUS
Document Type and Number:
WIPO Patent Application WO/2018/120888
Kind Code:
A1
Abstract:
Provided are a panoramic image compression method and apparatus. The method comprises: obtaining a first spherical model formed by a first panoramic image to be compressed; generating a second spherical model in the first spherical model according to a main view angle image of a user; establishing a first mapping relationship between planar two-dimensional rectangular coordinates of a second panoramic image and planar two-dimensional rectangular coordinates of the first panoramic image; and sampling, from the first panoramic image, according to the first mapping relationship, a pixel corresponding to each of the planar two-dimensional rectangular coordinates in the second panoramic image to constitute the second panoramic image containing pixels, so as to compress the first panoramic image. The method realizes asymmetric compression of a first panoramic image, uses a relatively high sampling rate for a main view image of a user to ensure the definition of the main view image of the user, and uses the relatively high sampling rate for the other images, such that the first panoramic image is compressed into a smaller second panoramic image, and thus facilitates the storage, transmission and decoding of the panoramic image.
Inventors:
ZHU JIADAN (CN)
WANG TAO (CN)
WANG TAO (CN)
Application Number:
PCT/CN2017/099694
Publication Date:
July 05, 2018
Filing Date:
August 30, 2017
Export Citation:
Assignee:
BEIJING QIYI CENTURY SCIENCE & TECHNOLOGY CO LTD (CN)
International Classes:
G06T3/00
Domestic Patent References:
| WO2005055607A1 | 2005-06-16 |
Foreign References:
| CN106651764A | 2017-05-10 | |||
| CN105915907A | 2016-08-31 | |||
| CN105631809A | 2016-06-01 | |||
| CN105933707A | 2016-09-07 | |||
| KR20050091278A | 2005-09-15 | |||
| US20130243351A1 | 2013-09-19 |
Other References:
GHAZNAVI YOUVALARI, RAMIN ET AL.: "Analysis of Regional Down-Sampling Methods for Coding of Omnidirectional Video", 2016 PICTURE CODING SYMPOSIUM (PCS, 7 December 2016 (2016-12-07), XP033086911
See also references of EP 3471052A4
See also references of EP 3471052A4
Attorney, Agent or Firm:
PATENTSINO IP FIRM (CN)
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