High Dynamic Range Video.

Sing Bing Kang (Microsoft, USA)

Typical video footage captured using an off-the-shelf camcorder suffers from limited dynamic range. In this talk, I will describe our approach to generate high dynamic range (HDR) video from an image sequence of a dynamic scene captured while rapidly varying the exposure of each frame. Our approach consists of three parts: automatic exposure control during capture, HDR stitching across neighboring frames, and tonemapping for viewing. HDR stitching requires accurately registering neighboring frames and choosing appropriate pixels for computing the radiance map. I will show examples for a variety of dynamic scenes, and will dwell a bit on the specific application of a virtual walkthrough. I will also describe how we can compensate for scene and camera movement when creating an HDR still from a series of bracketed still photographs.