3D Orthophotos, DEM Point Cloud generation Software

My objective is to have online cloud base SAAS open source which allows to generate high resolution georeferenced orthophotos (up to 1 cm accuracy with GCP) and exceptionally detailed DEMs / textured polygonal models. The fully automated workflow enables a non-specialist to process thousands of aerial images on a desktop computer to upload on cloud server and produce professional class photogrammetric data. Main Features Aerial and close-range triangulation Point cloud generation (sparse / dense) Polygonal model generation (plain / textured) Setting coordinate system Digital Elevation Model (DEM) generation True orthophoto generaton (Image Blending and Brightness) Georeferencing using flight log and / or GCPs Multispectral imagery processing 4D reconstruction for dynamic scenes Python scripting support Complete website to manage users and packages, and to view the processed result are also required. Opensource projects can be used to complete this project, but the output results must be better and refined. More details would be given on PM.