In-focus positioning device, in-focus positioning system, program and in-focus positioning method

摘要

The focusing adjustment unit changes the relative position of the camera's optical system and the element in which the shooting direction is toward a predetermined shooting target position from the first side in the shooting direction to the second side in the shooting direction. The evaluation unit adjusts with respect to the adjustment range, which is a range in which an adjustment member having a shape composed of a plurality of colors is installed at a target shooting position among images captured by the camera whenever the focusing adjustment unit changes the relative position between the optical system and the element. The evaluation value for monotonically increasing is calculated with respect to the standard deviation of the density of the pixels included in the range. The focusing position determining unit determines the focusing position of the camera based on the change in the evaluation value calculated by the evaluation unit.