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Novel panoramic video transmission and projection model

A panorama video and model technology, applied in the field of VR video, can solve the problems of picture quality degradation and floor plan distortion, and achieve the effect of reducing bit rate, improving efficiency, and high pixel resolution

Inactive Publication Date: 2018-07-20
嘀拍信息科技南通有限公司
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Problems solved by technology

[0007] (3) In order to keep the projected distance constant in the equidistant spherical projection model, the plan view obtained by the projection has serious distortion
so it still results in lower image quality near the equator

Method used

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Embodiment Construction

[0034] The technical solution adopted by the present invention is as follows: a new panoramic video transmission projection model, that is, an octahedral projection model, characterized in that the model is composed of two pyramid bottoms connected together, and the middle area of ​​the equator is the bottom of the pyramid. It has the longest perimeter, with only one point at the north and south ends; in order to make the image have a uniform pixel density, adjust the octahedron model to an equiangular octahedron model.

[0035] In this model, the present invention places the spherical surface inside the octahedron, and then projects the image on the spherical surface onto the octahedron. Then use the transformation in formula 2 to transform the texture coordinates of the octahedron into the texture coordinates of the equiangular octahedron.

[0036] Comparing the above three methods with the octahedral and equiangular octahedral projection models proposed in this case, the obtaine...

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Abstract

The invention relates to a novel panoramic video transmission and projection model, which is an octahedral projection model, and is characterized in that the model is formed by connecting the bottom parts of two pyramids, the bottom parts of the pyramids are positioned in the equator central region, the equator central region has the longest perimeter, and each of the south pole end and the northpole end is just a point; and the octahedron model is regulated into an equiangular octahedron model so that an image has a uniform pixel density. The novel panoramic video transmission and projectionmodel has the beneficial effects that: an image obtained by adopting the octahedral projection model has high density around the equator, and has low density in the north and south poles; distortionof the image obtained by projection is not obvious, and the efficiency of a video compression algorithm can be improved; and the novel panoramic video transmission and projection model applies the octahedral projection model to VR live broadcast, and can reduce the code rate on the premise of ensuring image quality of a region that users are interested in, thereby ensuring the real-time performance of videos and having good user experience.

Description

Technical field [0001] The invention relates to a VR video field, in particular to a new panoramic video transmission projection model. Background technique [0002] VR video, also known as panoramic video, refers to the use of professional VR photography tools to truly record the scene environment, and then through computer post-processing, it can be turned into a video that can be displayed in three-dimensional space. The transmission of panoramic video needs to first project a 360-degree panoramic image to form an image on the plane, and then compress the flat panoramic image before transmission. The projection method of the video image affects the efficiency of the video compression algorithm, the quality of the video, and the real-time nature of VR video transmission. [0003] The existing projection models mainly include the following types: [0004] First: Equidistant spherical projection model (EQ); [0005] (1) Equidistant projection requires that the distance of an image p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N9/31H04N13/363G03B37/00
CPCH04N9/3141H04N9/3179H04N9/3182G03B37/00
Inventor 李翔王波魏晔
Owner 嘀拍信息科技南通有限公司
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