METHOD AND APPARATUS FOR MAPPING VIRTUAL-REALITY IMAGE TO A SEGMENTED SPHERE PROJECTION FORMAT

摘要

Methods and apparatus of processing spherical images related to segmented sphere projection (SSP) are disclosed. According to one method, a North Pole region of the spherical image is projected to a first circular image and a South Pole region of the spherical image is projected to a second circular image using a mapping process selected from a mapping group comprising equal-area mapping, non-uniform mapping and cubemap mapping. Methods and apparatus of processing spherical images related to rotated sphere projection (RSP) are also disclosed. According to this method, the spherical image is projected into a first part of rotated sphere projection corresponding to a θχ φ region of the spherical image and a second part of rotated sphere projection corresponding to a remaining part of the spherical image using equal-area mapping.