Panoramic video mapping method based on main viewpoint
A technology of panoramic video and mapping method, applied in the field of virtual reality video, can solve the problems of difficulty in ensuring the video quality of the main viewpoint area, difficulty in reducing the complexity of encoding and decoding of panoramic video, and increasing complexity in encoding and decoding of video.
Active Publication Date: 2019-08-02
PEKING UNIV SHENZHEN GRADUATE SCHOOL
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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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[0050] Below in conjunction with the accompanying drawings, the present invention is further described by means of embodiments, but the scope of the present invention is not limited in any way.
[0051] The embodiments of the present invention provide a panorama image mapping method based on a main viewpoint, including a panorama image forward mapping method and a corresponding inverse mapping method. Embodiments of the forward mapping method and the inverse mapping method are respectively introduced below.
[0052] Panoramic image positive mapping methods such as figure 1 As shown, through the panoramic image forward mapping method provided by the present invention, the areas I, II, and III on the spherical surface are respectively mapped to the areas I, II, and III on the plane. figure 1 In the figure, the left side is a schematic diagram of a panoramic image on a spherical surface, and the right side is a schematic diagram of an image mapped by the method of the present inv...
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The invention discloses a panoramic video forward mapping method and a panoramic video de-mapping method, and relates to the field of virtual reality (VR) video. In the present invention, the forward mapping method is based on the main viewpoint and maps areas I, II, and III on the sphere to corresponding areas on the plane, where area I corresponds to the included angle 0° to Z 1 area, area II corresponds to the angle Z 1 ~Z 2 area, area III corresponds to the angle Z 2 ~180° area. The panoramic video forward mapping method maps the spherical surface corresponding to the panoramic image A to the flat square image B; the panoramic video de-mapping method maps the flat square image B back to the spherical surface for rendering and playback. The invention can greatly reduce the resolution of the video, effectively reduce the code rate of panoramic video encoding and the complexity of encoding and decoding, so as to achieve the purpose of reducing the encoding code rate and ensuring the video quality of the ROI area.
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 a main viewpoint, which can be used for panoramic video and can greatly reduce the quality of the main viewpoint area 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 videos provide a 360° viewing range, however, viewers only watch videos within 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, p...
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IPC IPC(8): G06T3/00
CPCG06T3/08G06T3/06G06T3/147G06T15/00G06T15/205G06T3/12
Inventor 王荣刚王悦名王振宇高文
Owner PEKING UNIV SHENZHEN GRADUATE SCHOOL