https://gazebosim.org/api/rendering/7/classgz_1_1rendering_1_1PixelUtil.html
Gazebo Rendering: PixelUtil Class Reference
gazeborenderingclassreference
https://ogrecave.github.io/ogre/api/1.11/class_ogre_1_1_pixel_util.html
OGRE: Ogre::PixelUtil Class Reference
ogreclassreference