Panorama image mapping method

Abstract

The invention discloses a panorama image mapping method. For a rectangular mapping panorama image with 2M*M resolution, a mapping region and a non-mapping region are set according to latitudes, the set mapping region is mapped to be a square region, for a point of the square region, a vertical distance and a horizontal distance from the point to the center of the square region are calculated, and the relatively larger one is marked as m; a distance n from the point to a zeroth point of a concentric square is calculated; the longitude and the latitude corresponding to the point are calculated; the corresponding position (X,Y) of the point reflected in a mapping mode to the rectangular mapping panorama image is calculated; and assignment of the point is carried out. Through the method, oversampling can be effectively reduced, so the pixel quantity of the panorama image and a code rate for coding can be effectively reduced on the condition that relatively small distortion is realized.

Description

technical field [0001] The present invention relates to the field of virtual reality (VR), in particular to a new panoramic image mapping technology, which can be used for equirectangular panoramic images and reduce the bit rate required for encoding the panoramic images. Background technique [0002] With the increasing development of virtual reality technology, the demand for virtual reality videos is increasing day by day. The 360° panorama image requires a wider viewing angle, so it requires a higher resolution than the traditional planar image, and the bit rate required for its encoding is also much higher than that of the traditional planar image. [0003] The most common mapping method nowadays is rectangular mapping, but this mapping method has serious oversampling phenomenon in high latitude regions. Both academia and industry have improved the mapping method of panoramic images, and mapped the rectangular-mapped panoramic images to some new planes to reduce oversa...

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