Recovering high dynamic range radiance maps from photographs
Proceedings of the 24th annual conference on Computer graphics and interactive techniques
Assorted Pixels: Multi-sampled Imaging with Structural Models
ECCV '02 Proceedings of the 7th European Conference on Computer Vision-Part IV
ACM SIGGRAPH 2003 Papers
Adaptive Dynamic Range Imaging: Optical Control of Pixel Exposures Over Space and Time
ICCV '03 Proceedings of the Ninth IEEE International Conference on Computer Vision - Volume 2
Brightness perception, dynamic range and noise: a unifying model for adaptive image sensors
CVPR'04 Proceedings of the 2004 IEEE computer society conference on Computer vision and pattern recognition
Grabbing real light: toward virtual presence
Proceedings of the 27th Spring Conference on Computer Graphics
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Wide dynamic range images (WDRIs) are needed for capturing scenes which include drastic lighting changes. This paper presents a method to widen the dynamic range of a camera by using a reflective liquid crystal. The system consists of a camera and a reflective liquid crystal placed in front of the camera. By controlling the attenuation ratio of the liquid crystal, scene radiance of each pixel is controlled adaptively. After applying the control, the original scene radiance is derived from the attenuation ratio of the liquid crystal and the radiance obtained by the camera. We have implemented a prototype system and conducted experiments in a scene that includes drastic lighting changes. These lighting changes require that we control the radiance of each pixel independently. We show how WDRIs are obtained by calculating the original scene radiance from these results.