Dimension estimation device, dimension estimation method and dimension estimation program

A dimension estimation method comprising

• causing a computer to execute processing of:
• acquiring an image acquired in a moving body;
• calculating a vanishing point and a predetermined decision line in the image;
• detecting an object in the image and detecting a detection rectangle that is a rectangle including a first surface that is a surface close to a photographing position, the first surface being in proximity to the decision line for the object;
• and
• estimating a dimension of the object based on a ratio between a height of the first surface and a height of a second surface that is a surface far from the photographing position obtainable from a relationship between the detection rectangle and the vanishing point.

A non-transitory, computer-readable storage medium storing a dimension estimation program that causes a computer to execute processing of:

• acquiring an image acquired in a moving body;
• calculating a vanishing point and a predetermined decision line in the image;
• detecting an object in the image and detecting a detection rectangle that is a rectangle including a first surface that is a surface close to a photographing position, the first surface being in proximity to the decision line for the object;
• and
• estimating a dimension of the object based on a ratio between a height of the first surface and a height of a second surface that is a surface far from the photographing position obtainable from a relationship between the detection rectangle and the vanishing point.