Vision sensor, operating method of vision sensor, and image processing device including the vision sensor

An operating method of a vision sensor comprising a pixel array comprising a plurality of pixels, the operating method comprising:

• generating a plurality of pieces of event data respectively corresponding to the pixels in which an event has occurred among the plurality of pixels;
• generating first probability data based on the plurality of pieces of event data based on an event occurring during a first sampling time;
• generating comparison data based on a difference between the first probability data and reference data by comparing the first probability data with the reference data;
• determining whether to update a motion count value by comparing the comparison data with a first threshold value;
• and
• generating a motion signal based on a result of comparing a final motion count value generated by determining whether to update the motion count value with a second threshold value,
• wherein
• the pixel array includes a plurality of sub regions including at least one pixel,
• the generating of the first probability data includes generating a plurality of pieces of first probability data respectively corresponding to the plurality of sub regions based on the plurality of pieces of first event data,
• the generating of the comparison data includes generating a plurality of pieces of comparison data respectively corresponding to the plurality of sub regions by comparing each of the plurality of pieces of first probability data respectively corresponding to the plurality of sub regions with a third threshold value corresponding to the reference data, and
• the determining of whether to update the motion count value includes
• determining whether to update a plurality of exclusion coefficients respectively corresponding to the plurality of sub regions based on the plurality of pieces of comparison data respectively corresponding to the plurality of sub regions;
• and
• setting a valid region based on a plurality of final exclusion coefficients respectively corresponding to the plurality of sub regions generated by determining whether to update the plurality of exclusion coefficients.