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

J. Fernández-Berni; R. Carmona-Galán; R. del Río; R. Kleihorst; W. Philips; Á. Rodríguez-Vázquez

doi:10.1117/12.2078356

27 February 2015 Real-time single-exposure ROI-driven HDR adaptation based on focal-plane reconfiguration

J. Fernández-Berni, R. Carmona-Galán, R. del Río, R. Kleihorst, W. Philips, Á. Rodríguez-Vázquez

Proceedings Volume 9400, Real-Time Image and Video Processing 2015; 94000K (2015) https://doi.org/10.1117/12.2078356
Event: SPIE/IS&T Electronic Imaging, 2015, San Francisco, California, United States

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.

Citation Download Citation

J. Fernández-Berni, R. Carmona-Galán, R. del Río, R. Kleihorst, W. Philips, and Á. Rodríguez-Vázquez "Real-time single-exposure ROI-driven HDR adaptation based on focal-plane reconfiguration", Proc. SPIE 9400, Real-Time Image and Video Processing 2015, 94000K (27 February 2015); https://doi.org/10.1117/12.2078356

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