Imaging device, imaging system, non-transitory storage medium, and control method

A non-transitory storage medium on which is stored a computer program for making a computer execute a method for an imaging device comprising (1) a first imaging element having sensitivity to visible light and configured to output a first image signal in which an accumulation time per frame of the first image signal is a first period and (2) a second imaging element having sensitivity to infrared light and configured to output a second image signal and a third image signal acquired under an exposure condition different from that of the second image signal, wherein the second image signal and the third image signal are acquired at a second frame rate, the method comprising:

• setting a second frame rate of the second imaging element higher than a first frame rate of the first imaging element, wherein a second period that is an accumulation time per frame of the second image signal is longer than a third period that is an accumulation time per frame of the third image signal, and wherein each of the second period and the third period is shorter than the first period;
• and
• generating a fourth image signal in accordance with a combination of (a) the first image signal of the first frame rate output from the first imaging element and (b) the second image signal of the second frame rate and the third image signal of the second frame rate output from the second imaging element.

A control method for an imaging device comprising (1) a first imaging element having sensitivity to visible light and configured to output a first image signal in which an accumulation time per frame of the first image signal is a first period and (2) a second imaging element having sensitivity to infrared light and configured to output a second image signal and a third image signal acquired under an exposure condition different from that of the second image signal, wherein the second image signal and the third image signal are acquired at a second frame rate, the method comprising:

• setting a second frame rate of the second imaging element higher than a first frame rate of the first imaging element, wherein a second period that is an accumulation time per frame of the second image signal is longer than a third period that is an accumulation time per frame of the third image signal, and wherein each of the second period and the third period is shorter than the first period;
• and
• generating a fourth image signal in accordance with a combination of (a) the first image signal of the first frame rate output from the first imaging element and (b) the second image signal of the second frame rate and the third image signal of the second frame rate output from the second imaging element.