Signal processing device, signal processing method, and detection sensor

A signal processing method performed by a signal processing device, the method comprising:

• counting a first count number, which is a count number of pixels in which a first luminance change in a positive direction is detected, and a second count number, which is a count number of pixels in which a second luminance change in a negative direction is detected, in an image output from a light receiving unit at a predetermined frame rate and indicating a luminance change;
• generating a coefficient corresponding to a time at which the luminance change is detected;
• and
• integrating a multiplication result of the count number of the pixels and the coefficient.

A detection sensor comprising:

• a light receiving unit in which pixels that perform photoelectric conversion of incident light and generate electric signals are arranged in a lattice pattern;
• a count unit that counts a first count number, which is a count number of pixels in which a first luminance change in a positive direction is detected, and a second count number, which is a count number of pixels in which a second luminance change in a negative direction is detected, in an image output from the light receiving unit at a predetermined frame rate and indicating a luminance change;
• a coefficient generation unit that generates a coefficient corresponding to a time at which the luminance change is detected;
• and
• an integrating unit that integrates a multiplication result of the count number of the pixels and the coefficient,
• wherein the count unit, the coefficient generation unit, and the integrating unit are each implemented via at least one processor.