L.E.I.C.A. (Long Exposure Internet CAmera) is an application that takes input from your webcam, or v4l2 device, and makes a long-exposure image.
Until now there's only a python binding for this app, soon there will be a C/C++ SDL one
HDRFlow is a framework to process high-dynamic range (HDR) and RAW images. It's written in C++, and is both cross-platform and hardware accelerated on modern GPUs.
The goal of this project is the development of a visual code system for camera-equipped mobile phones. It will recognize 2-D visual codes and compute the orientation of the phone relative to the codes. The software will be written in C++ for Symbian OS.