Abstract: A white balance adjustment jig for an endoscope includes: an insertion portion that includes at least one insertion hole into which a distal end part of an endoscope is inserted; a lid portion that is disposed to face the insertion portion; and an outer peripheral portion that is in contact with the insertion portion and the lid portion to form an internal space. The lid portion includes a chart having a plurality of marks on a surface on an insertion portion side, and the chart is inclined with respect to a perpendicular plane perpendicular to the insertion direction of the distal end part.

Abstract: A position specifying section obtains an observation distance by specifying the position of an irradiated region from a picked-up image that is obtained from the image pickup of a subject on which the irradiated region is formed by auxiliary measurement light. An image processing section sets the amount of offset, which corresponds to a height of the irradiated region of a convex portion of the subject, for the observation distance, and generates an offset measurement marker on the basis of the offset distance that obtained by adding the amount of offset to the observation distance. A specific image in which the offset measurement marker is superimposed on the picked-up image is displayed on a display unit.

Abstract: A position specifying section obtains an observation distance by specifying the position of an irradiated region from a picked-up image that is obtained from the image pickup of a subject on which the irradiated region is formed by auxiliary measurement light. An image processing section sets the amount of offset, which corresponds to a height of the irradiated region of a convex portion of the subject, for the observation distance, and generates an offset measurement marker on the basis of the offset distance that obtained by adding the amount of offset to the observation distance. A specific image in which the offset measurement marker is superimposed on the picked-up image is displayed on a display unit.