Panoramic video mapping methods based on main viewpoint

Abstract

The invention discloses a panoramic video positive mapping method and a panoramic video reverse mapping method, and relates to the field of a VR (Virtual Reality) video. In the invention, according to the positive mapping method, based on a main viewpoint, regions I, II and III on a spherical surface are respectively mapped to corresponding regions on a plane, wherein the region I corresponds to a region with an included angle of 0 degree to Z1, the region II corresponds to a region with an included angle of Z1 to Z2, and the region III corresponds to a region with an included angle of Z2 to 180 degrees. According to the panoramic video positive mapping method, a spherical surface corresponding to a panoramic image A is mapped onto a plane square image B; and according to the panoramic video reverse mapping method, the plane square image B is mapped back to the spherical surface to carry out rendering playing. According to the panoramic video positive mapping method and the panoramic video reverse mapping method which are disclosed by the invention, a resolution of the video can be greatly reduced, a code rate of panoramic video encoding and complexity of encoding and decoding are effectively reduced, and the aims of reducing the encoding code rate and ensuring video quality of an ROI region are fulfilled.

Description

technical field [0001] The present invention relates to the field of virtual reality (VR) video, in particular to a panoramic video mapping method based on the main viewpoint, which can be used for panoramic video, and can greatly reduce the quality of the panoramic video under the premise that the quality of the main viewpoint area of ​​the panoramic video remains unchanged. File size and encoding bitrate. Background technique [0002] With the increasing development of virtual reality technology, the demand for virtual reality videos is increasing day by day. Panoramic video provides a 360° viewing range, but viewers only watch videos in a certain area for a period of time. In the above cases, the video area watched by the viewer may be called the main viewpoint area, and the main viewpoint area is often only a part of the 360° panoramic video. [0003] Because 360° requires a wider viewing angle, compared with traditional flat video, panoramic video requires higher reso...

AI Technical Summary

Problems solved by technology

[0003] Because 360° requires a wider viewing angle, compared with traditional flat video, panoramic video requires higher resolution, and the bit rate required for encoding is also much higher than traditional flat video, and video encoding The complexity of decoding is also greatly increased

Existing mapping methods are difficult to reduce the bit rate and codec complexity of panoramic video coding, and it is also difficult to guarantee the video quality of the main viewpoint area

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