Detection system and detection method

A detection system comprising:

• an obtainment circuit that obtains image data and event data, the image data being generated based on an amount of light received by each of a plurality of pixels from a detection target, the event data being generated based on a change in an amount of light received by each of a plurality of pixels from the detection target;
• a processing circuit that extracts, from the event data as auxiliary information, information to be used to assist in detecting the detection target from the image data;
• and
• a detection circuit that detects the detection target or a state of the detection target based on at least the image data and the auxiliary information.