My work does true ortho rectification. We are looking to transition into a more open source company. One of the processes we are looking to "open source" is true ortho. Does anyone know of a software package (open source) that can perform true orthorectification. Ideally, it would be a complete package, but it could be a series of libraries, tools, plugins, etc.
A true ortho is similar, but different to a regular ortho. With regular orthos you will have building lean. A true ortho is a process to remove the lean, and "stand-up" the buildings. The following is an explanation: http://www.esri.com/news/arcuser/1001/standup.html
Because of this, I do not believe this is a duplicated question.