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Panoramic video mapping method based on main viewpoint

A technology of panoramic video and mapping method, applied in the field of reverse mapping, can solve problems such as low coding efficiency

Active Publication Date: 2021-03-30
PEKING UNIV SHENZHEN GRADUATE SCHOOL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the coding efficiency of the existing asymmetric mapping technology is low and needs to be improved.

Method used

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  • Panoramic video mapping method based on main viewpoint
  • Panoramic video mapping method based on main viewpoint
  • Panoramic video mapping method based on main viewpoint

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Embodiment Construction

[0063] Below in conjunction with accompanying drawing, further describe the present invention through embodiment, but do not limit the scope of the present invention in any way.

[0064] An embodiment of the present invention provides a panoramic image mapping method based on a main viewpoint, including a panoramic image mapping method and a corresponding inverse mapping method. The following describes the embodiments of the mapping method and the inverse mapping method respectively.

[0065] In the embodiment of the panoramic image mapping method, we map the spherical surface corresponding to the panoramic image A (such as longitude and latitude map, cube map image, etc.) of a certain mapping format to the corresponding plane image B of the panoramic mapping designed in the present invention, and the plane Image B contains a resolution of W I′ ×H I′ The rectangular plane I′ and the resolution W II′ ×H II′ Rectangular plane VI'. The panoramic image mapping method first pro...

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Abstract

The present invention discloses a new panoramic video asymmetric mapping method and corresponding inverse mapping method, through which the spherical surface corresponding to the panoramic image or video A is mapped to the two-dimensional image or video B; firstly, the spherical surface is projected to the bottom surface On the square isosceles quadrangular pyramid, the quadrangular pyramid is further projected onto the plane; in the projection, equiangular projection is used for the area of ​​the main viewpoint and a higher sampling density is used to ensure that the video quality of the area of ​​the main viewpoint is higher. Non-main viewpoint areas use lower sampling density to save bit rate. The panoramic video asymmetric mapping technology greatly reduces the resolution of the rest of the video while ensuring the video quality of the main viewpoint area remains unchanged, effectively saving the bit rate required for virtual reality video coding. Panoramic video asymmetric back-mapping technology provides a method of mapping back from a plane to a sphere, through which a plane video can be mapped back to a sphere for rendering and viewing.

Description

technical field [0001] The present invention relates to the field of virtual reality (VR) video technology, and in particular to a new main viewpoint-based panoramic video mapping method and a corresponding inverse mapping method. The mapping technology is used for panoramic video and ensures the quality of the main viewpoint area of ​​panoramic video Under the same premise, the file size and encoding bit rate of the panoramic video can be greatly reduced. Background technique [0002] With the development of virtual reality video, the demand for virtual reality video is increasing day by day. Compared with the more than 100-degree viewing angle of traditional video screens, virtual reality videos need to provide a 360-degree viewing angle, so virtual reality videos need a larger resolution. In addition, virtual reality videos usually need to be watched on head-mounted devices, in order not to give users To cause dizziness, the recommended frame rate needs to be above 60 fr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06T3/00
CPCG06T3/12G06T3/4007G06T3/4038G06T3/06
Inventor 王荣刚王悦名王振宇高文
Owner PEKING UNIV SHENZHEN GRADUATE SCHOOL