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

An imaging method for imaging an object, the imaging method comprising:

• acquiring position information of an object existing in an imaging region;
• setting a target region based on the position information of a reference object acquired at the acquiring;
• and
• controlling a focal position of an imaging device so as to adjust, from a timing when an object other than the reference object exists in enters the target region from an outside of the target region to a timing when the object goes out of the target region, the focal position on the object, wherein
• the setting further comprising setting the target region based on the position information of the reference object located between a first position where a distance from the imaging device is a first distance and a second position where a distance from the imaging device is a second distance shorter than the first distance, and
• the position information is a relative position with respect to the imaging device.

A non-transitory storage medium that stores a program for causing a computer to execute an imaging method for imaging an object, the program comprising:

• acquiring position information of an object existing in an imaging region;
• setting a target region based on the position information of a reference object acquired at the acquiring;
• and
• controlling a focal position of an imaging device so as to adjust, from a timing when an object other than the reference object enters the target region from an outside of the target region to a timing when the object goes out of the target region, the focal position on the object, wherein
• the setting further comprising setting the target region based on the position information of the reference object located between a first position where a distance from the imaging device is a first distance and a second position where a distance from the imaging device is a second distance shorter than the first distance, and
• the position information is a relative position with respect to the imaging device.