Orfeo Toolbox (OTB) is a library for remote sensing image processing. The project was initiated by the French space agency (CNES) in 2006 and is under heavy development. The software is released under a free licence; a number of contributors outside CNES are taking part in development and integrating into other projects. The goal is to provide potential users of satellite images with all the tools necessary to use these images. The library is originally targeted at high resolution images acquired by the Orfeo constellation: Pleiades satellites and Cosmo-Skymed but also handles a wide variety of sensors.