An Asymmetric Mapping Method for Panoramic Images

Abstract

The invention discloses an asymmetric mapping method for panoramic images, which includes a mapping process and a reverse mapping process; the mapping process converts the original image into an asymmetric image through an asymmetric forward mapping method; including: mapping the latitude and longitude map coordinates to the original Panorama coordinates; calculate the maximum horizontal and vertical downsampling ratio of the area of ​​interest in the latitude and longitude map; establish a mapping relationship from the map to the coordinates of the same point in the latitude and longitude map; generate an asymmetric map; the reverse mapping process uses asymmetric reverse mapping Method maps the asymmetric graph to the original graph. The original image is a panorama in any format. The present invention uses higher sampling precision for the area of ​​interest in the panoramic image and uses lower sampling precision for the non-interesting area, thereby reducing the image resolution and thereby reducing the data volume of the panoramic image.

Description

technical field [0001] The present invention relates to the technical field of virtual reality (VR), in particular to a new asymmetric mapping method for panoramic images, which can reduce the image area occupied by non-ROI regions (regions of non-interest) on the panoramic image and reduce the need for encoding panoramic images. bit rate Background technique [0002] Currently, virtual reality technology and related applications are developing rapidly. In virtual reality technology, panoramic images are an important component. Since the panoramic image records the entire picture of the 360-degree viewing angle, it has a very high amount of data, which is not conducive to transmission and storage. [0003] Because often only a part of the panoramic image is an area that the user is more interested in, and the remaining part is not easy to attract the user's attention. Therefore, a higher sampling precision can be used for the region of interest (ROI) in the panoramic imag...

AI Technical Summary

Problems solved by technology

However, the current general panorama image mapping method based on the longitude and latitude map cannot flexibly set the sampling accuracy of the image.

Therefore, the existing panoramic image mapping method cannot use the above-mentioned asymmetric sampling accuracy, the mapping method is unreasonable, and it is difficult to reduce the data volume of the panoramic image

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