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Proceedings Paper

Real-time single-exposure ROI-driven HDR adaptation based on focal-plane reconfiguration
Author(s): J. Fernández-Berni; R. Carmona-Galán; R. del Río; R. Kleihorst; W. Philips; Á. Rodríguez-Vázquez
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Paper 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 intertwined 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 ROI, senses the mean illumination of that ROI. Additional circuitry interconnecting both photo-diodes enables the asynchronous adjustment of the integration time for each ROI according to this sensed illumination. The sensor can be reconfigured on-the-fly according to the requirements of a vision algorithm.

Paper Details

Date Published: 27 February 2015
PDF: 6 pages
Proc. SPIE 9400, Real-Time Image and Video Processing 2015, 94000K (27 February 2015); doi: 10.1117/12.2078356
Show Author Affiliations
J. Fernández-Berni, Instituto de Microelectrónica de Sevilla (Spain)
R. Carmona-Galán, Instituto de Microelectrónica de Sevilla (Spain)
R. del Río, Instituto de Microelectrónica de Sevilla (Spain)
R. Kleihorst, Univ. Gent (Belgium)
W. Philips, Univ. Gent (Belgium)
Á. Rodríguez-Vázquez, Instituto de Microelectrónica de Sevilla (Spain)


Published in SPIE Proceedings Vol. 9400:
Real-Time Image and Video Processing 2015
Nasser Kehtarnavaz; Matthias F. Carlsohn, Editor(s)

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