Passing determination device, passing determination system, and passing determination method

A passing determination system, comprising:

• a camera that captures an image of a trailer;
• and
• a processor that
• captures a captured image from the camera,
• acquires the captured image at a predetermined time interval from the camera,
• sets a coordinate in a direction corresponding to a traveling direction of the trailer in the captured image,
• calculates a first coordinate of the trailer, and
• determines that the trailer passes through a passing determination position when an amount of change between the calculated first coordinate and a second coordinate of the trailer calculated from the captured image acquired immediately before is equal to or greater than a predetermined threshold value.

A passing determination method, comprising:

• acquiring a captured image at a predetermined time interval from a camera that captures an image of a trailer;
• setting a coordinate in a direction corresponding to a traveling direction of the trailer in the captured image;
• calculating a first coordinate of the trailer;
• and
• determining that the trailer passes through a passing determination position when an amount of change between the calculated first coordinate and a second coordinate of the trailer calculated from the captured image acquired immediately before is equal to or greater than a predetermined threshold value.