A general approach to backwards-compatible delivery of high dynamic range images and video

Greg Ward
2008 ACM SIGGRAPH 2008 classes on - SIGGRAPH '08  
We propose a general solution to the problem of decoding high dynamic range (HDR) information stored as a supplement to low dynamic range (LDR) images or video. Each LDR frame is paired with a lower resolution HDR version, and these are compressed separately using any of the existing methods appropriate to the task. On decode, the low-resolution HDR image is upsampled to match the resolution of the LDR version, and the high frequencies are transferred from the LDR to the HDR frame. The recovery
more » ... process places no constraints on the color space or tone-mapping of the backwards-compatible LDR content, and is thus ideally suited to applications such as DVD movies that target legacy equipment while building in forwardcompatibility with emerging HDR systems. A fast and simple recovery algorithm is demonstrated, followed by a more sophisticated and accurate technique. Examples are shown on computer-generated video frames as well as HDR captured video.
doi:10.1145/1401132.1401172 dblp:conf/siggraph/Ward08a fatcat:ard3p2zyqzbspo2dnj4d7jaqoy