Imaging device and camera system including sense circuits to make binary decision

An imaging device comprising:

• a photoelectric converting device that outputs one or more signals according to one or more input photons;
• a reset transistor configured to reset the photoelectric converting device according to a first exposure period and a second exposure period;
• a sense circuit that performs one or more binary decisions based on the one or more signals from the photoelectric converting device during the first exposure period and the second exposure period and outputs one or more decision results based on the one or more binary decisions, and
• decision result circuitry including a count circuit configured to perform a count process to integrate decision results from the sense circuit, and a memory configured to store a counting result from the count circuit, wherein the decision result circuitry is configured to store a counting result of the second exposure period in the memory upon determination that a counting result of the first exposure period exceeds a predetermined value.