Multi-dimensional imaging method of spad array based on pixel-end single-counting architecture

Abstract

The application provides a multi-dimensional imaging method of a SPAD array based on a pixel end single counting architecture, applied to a multi-dimensional imaging system, including: an intensity solving unit generating an intensity effective working interval and an intensity counting mode of a dual-mode counting unit according to an enabling signal sent by a mode selection unit; and generating intensity information or photon intensity change information according to intensity photon statistical results fed back by the dual-mode counting unit; a depth solving unit generating a depth effective working interval and a depth counting mode of the dual-mode counting unit according to the enabling signal sent by the mode selection unit, and performing compression processing on the depth effective working interval by using a dichotomy method according to depth photon statistical results fed back by the dual-mode counting unit, to obtain final depth information; and an imaging unit generating an imaging result under a corresponding working mode instruction according to the enabling signal, the final depth information, the intensity information or the photon intensity change information. Two-dimensional and three-dimensional information is synchronously and efficiently acquired with high resolution and high frame rate.

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