omnieval

Gives the user the ability to convert omnidirectional images/video (yuv format) from one representation to another. For example, can convert an equirectangular video to a mercator video. Moreover, the difference in quality between the two videos can be computed. The user can choose between weighted and unweighted mean square error comparisons. Note that code can also be used to cutout a viewport (e.g., corresponding to the view seen through a head mounted display).

Build

Remapping from one representation to another:

cd remap
mkdir build
cd build
cmake ../
make

Comparing two representations:

cd compsph
mkdir build
cd build
cmake ../
make

Usage

Example 1: conversion from equirectangular (2048x1024) to equalarea (1024x512):

./remap -i rect -o eqar -m 1024 -b 2048 -n 512 -v 1024 rect.yuv eqar.yuv

Example 2: comparing an equirectangular (2048x1024) and an equalarea (1024x512) representation using using equal weighting:

./compsph -i rect -o eqar -m 1024 -b 2048 -n 512 -v 1024 rect.yuv eqar.yuv sphere_655362.txt

Example 3: comparing an equirectangular (2048x1024) and an equalarea (1024x512) representation using latitude weighted points:

./compsph -i rect -o eqar -m 1024 -b 2048 -n 512 -v 1024 -w latweights.txt rect.yuv eqar.yuv sphere_655362.txt

Note

This code builds on Environment Mapping Tools, created by Robert Kooima: https://github.com/rlk/envtools