Automatic Scene Relighting for Video Conferencing

Date Added: Aug 2009
Format: PDF

This paper describes a new method to automatically improve scene lighting for video conferencing by learning the photometric mapping between a lower exposure and desired exposure created using High Dynamic Range (HDR) imaging techniques. Once the mapping is learned in a calibration step, it can be used to transform all subsequent images, effectively producing higher dynamic range video without ghosting artifacts. Stereo algorithms also described that allows multiple exposures to be taken at every frame, useful if the lighting of a scene changes significantly.