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Panoramic video mapping method based on main viewpoint

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

Active Publication Date: 2018-01-23
PEKING UNIV SHENZHEN GRADUATE SCHOOL
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  • Abstract
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  • 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 invention discloses a new asymmetrical panoramic video mapping method and a corresponding inverse mapping method. The mapping method comprises the steps of mapping a sphere corresponding to a panoramic image or a video A into a two-dimensional image or a video B; projecting the sphere to an isosceles rectangular pyramid with a quadrate bottom surface, and then projecting the rectangular pyramid to a plane; adopting isometrical projection for a region of a main viewpoint in projection and adopting a higher sampling density to ensure high video quality of the region of the main viewpoint; and adopting a lower sampling density for a region of non-viewpoint to save a code rate. With the asymmetrical mapping technology for the panoramic video, the resolution ratio of other regions in the video is greatly reduced and the code rate needed for encoding of a virtual-reality video is effectively saved on the premise of guaranteeing the video quality of the region of the main viewpoint unchanged. The asymmetrical mapping technology for the panoramic video provides a method for mapping the video from the plane to the sphere; and through the method, a planar video can be mapped back to thesphere 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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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
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