Python-Spherical-Projection

Convert cubemap image to an equirectangular spherical projection image using Python 2.7.

Currently only works with cubemaps laid out in the following format:

         ________
        |        |
        |   top  |
        |        |
 _______|________|_________________
|       |        |        |        |
| left  |  front |  right |  back  |
|       |        |        |        |
|_______|________|________|________|
        |        |
        |        |
        |  down  |
        |________|

Input Image input

Output Image output

Instructions

Open an image using PIL or equivalent.
Calculate dimensions of output image. (Width must be 2xheight. Height can be any percentage of input image, but larger output images lead to less precise results.)
Calculate length of each square face (ie. 1/3 height of the input, due to height being made from 3 faces - top,front,down)
Create an output image using the new dimensions.
For each pixel location in the output image run cube2equi.find_corresponding_pixel() to return the corresponding pixel in the input image.
Take the colour value for the input image pixel and apply it to the pixel in the output.

TODO

Automate all setup steps
Allow for different cubemap layouts