High Dynamic Range Video for Photometric Measurement of Illumination

Jonas Unger and Stefan Gustavson
  VITA, Linköping University

Camera Light Probe Image, dynamic range 10,000,000 : 1 Light Probe Image, 6 exposures


We describe the design and implementation of a high dynamic range (HDR) imaging system capable of capturing RGB color images with a dynamic range of 10,000,000 : 1 at 25 frames per second. We use a highly programmable camera unit with high throughput A/D conversion, data processing and data output.
HDR acquisition is performed by multiple exposures in a continuous rolling shutter progression over the sensor. All the different exposures for one particular row of pixels are acquired head to tail within the frame time, which means that the time disparity between exposures is minimal, the entire frame time can be used for light integration and the longest exposure is almost the entire frame time. The system is highly configurable, and trade-offs are possible between dynamic range, precision, number of exposures, image resolution and frame rate.
Keywords: high dynamic range imaging, HDR, multiple exposures, video, rolling shutter
High Dynamic Range Video for Photometric Measurement of Illumination,
Electronic Imaging 2007 (.pdf)
Related Projects:
HDR video imaging project


Jonas Unger 2019