Single photon avalanche diode based event-based vision sensor

An event-based vision sensor (EVS), comprising:

• a SPAD array, comprising a plurality of SPAD pixels;
• a plurality of counters, coupled to the SPAD array, and configured to count a number of photons received by every SPAD pixel of the SPAD pixel array within every exposure time;
• and
• a processor, coupled to the plurality of counters, and configured to generate multiple index change frames, each comprising multiple index changes of the plurality of SPAD pixels of the SPAD array between adjacent exposure times, between two image frames according to counted photons of the plurality of SPAD pixels in the every exposure time.

An event-based vision sensor (EVS), comprising:

• a SPAD array, comprising a plurality of SPAD pixels;
• a plurality of counters, coupled to the SPAD array, and configured to count a number of photons received by every SPAD pixel of the SPAD array within every exposure time;
• and
• a processor, coupled to the plurality of counters, and configured to generate EVS frames, for calculating illumination changes, faster than generating image frames, for object tracking, according counted photons of the plurality of SPAD pixels in the every exposure time.