Equirectangular to rectilinear_v0.1 - FoxelSA/libgnomonic GitHub Wiki

The equirectangular to rectlinear functions allow to create rectilinear mapping from entire or partial equirectangular mapping. Two main functions are proposed by the library. The first one create rectilinear mapping from an entire equirectangular mapping when the second one wait a tile of the equirectangular mapping for rectilinear tile extraction.

We illustrate here the results obtained using the function considering a entire equirectangular mapping for rectilinear mapping extraction. Considering the following equirectangular mapping of a panorama (copyright (c) Didier Mouron under CC BY-SA license) :

a first rectilinear image obtained through gnomonic projection and using bicubic interpolation is shown by the following image :

Considering the same equirectangular mapping and a different line of sight as gnomonic projection parameter, different rectilinear mapping can be obtained as shown by the following image :

Using different parameters for angular aperture, line of sight and ratio, every rectilinear mapping can be obtained considering a given equirectangular mapping.