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Real-time single-exposure ROI-driven HDR adaptation based on focal-plane reconfiguration

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Abstract
This paper describes a prototype smart imager capable of adjusting the photo-integration time of multiple regions of interest concurrently, automatically and asynchronously with a single exposure period. The operation is supported by two interwined photo-diodes at pixel level and two digital registers at the periphery of the pixel matrix. These registers divide the focal-plane into independent regions within which automatic concurrent adjustment of the integration time takes place. At pixel level, one of the photo-diodes senses the pixel value itself whereas the other, in collaboration with its counterparts in a particular ROT, senses the mean illumination of that ROT. Additional circuitry interconnecting both photo-diodes enables the asynchronous adjustment of the integration time for each ROT according to this sensed illumination. The sensor can be reconfigured on-the-fly according to the requirements of a vision algorithm.
Keywords
integral images, mixed-signal circuitry, OpenCV library, RANGE, SENSOR, Viola-Jones algorithm, TRACKING, sensing-processing arrays, smart imaging, Haar-like features

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Chicago
Fernández-Berni, J, R Carmona-Galán, R del Río, Richard Kleihorst, Wilfried Philips, and Á Rodríguez-Vázquez. 2015. “Real-time Single-exposure ROI-driven HDR Adaptation Based on Focal-plane Reconfiguration.” In Proceedings of SPIE. Vol. 9400. Soc Imaging Sci & Technol; SPIE.
APA
Fernández-Berni, J, Carmona-Galán, R., del Río, R., Kleihorst, R., Philips, W., & Rodríguez-Vázquez, Á. (2015). Real-time single-exposure ROI-driven HDR adaptation based on focal-plane reconfiguration. Proceedings of SPIE (Vol. 9400). Presented at the Conference on Real-Time Image and Video Processing, Soc Imaging Sci & Technol; SPIE.
Vancouver
1.
Fernández-Berni J, Carmona-Galán R, del Río R, Kleihorst R, Philips W, Rodríguez-Vázquez Á. Real-time single-exposure ROI-driven HDR adaptation based on focal-plane reconfiguration. Proceedings of SPIE. Soc Imaging Sci & Technol; SPIE; 2015.
MLA
Fernández-Berni, J, R Carmona-Galán, R del Río, et al. “Real-time Single-exposure ROI-driven HDR Adaptation Based on Focal-plane Reconfiguration.” Proceedings of SPIE. Vol. 9400. Soc Imaging Sci & Technol; SPIE, 2015. Print.
@inproceedings{8027617,
  abstract     = {This paper describes a prototype smart imager capable of adjusting the photo-integration time of multiple regions of interest concurrently, automatically and asynchronously with a single exposure period. The operation is supported by two interwined photo-diodes at pixel level and two digital registers at the periphery of the pixel matrix. These registers divide the focal-plane into independent regions within which automatic concurrent adjustment of the integration time takes place. At pixel level, one of the photo-diodes senses the pixel value itself whereas the other, in collaboration with its counterparts in a particular ROT, senses the mean illumination of that ROT. Additional circuitry interconnecting both photo-diodes enables the asynchronous adjustment of the integration time for each ROT according to this sensed illumination. The sensor can be reconfigured on-the-fly according to the requirements of a vision algorithm.},
  articleno    = {94000K},
  author       = {Fern{\'a}ndez-Berni, J and Carmona-Gal{\'a}n, R and del R{\'i}o, R and Kleihorst, Richard and Philips, Wilfried and Rodr{\'i}guez-V{\'a}zquez, {\'A}},
  booktitle    = {Proceedings of SPIE},
  isbn         = {978-1-62841-490-5},
  issn         = {0277-786X},
  language     = {eng},
  location     = {San Francisco, CA},
  publisher    = {Soc Imaging Sci \& Technol; SPIE},
  title        = {Real-time single-exposure ROI-driven HDR adaptation based on focal-plane reconfiguration},
  url          = {http://dx.doi.org/10.1117/12.2078356},
  volume       = {9400},
  year         = {2015},
}

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