Depth measurement apparatus, imaging apparatus, and depth measurement method

An imaging apparatus comprising:

• an imaging optical system;
• an imaging device that acquires a color image formed of a plurality of color planes;
• and
• the depth measurement apparatus for calculating depth information on an object, using one color image,
• wherein the depth measurement apparatus comprises:
• a selection unit adapted to select, from a plurality of color planes of the color image, at least two color planes with different image formation positions;
• an adjusting unit adapted to adjust a luminance difference between the selected color planes;
• and
• a calculation unit adapted to calculate the depth information using a difference in blur between the color planes for which the luminance difference has been adjusted.

A depth measurement method executed by a depth measurement apparatus calculating depth information on an object, using one color image,

• the depth measurement method comprising:
• a selection step of selecting, from a plurality of color planes of the color image, at least two color planes with different image formation positions;
• an adjusting step of adjusting a luminance difference between the selected color planes;
• and
• a calculation step of calculating the depth information, using a difference in blur between the adjusted color planes.

A computer readable storage medium including a program stored therein in a non-transitory manner, the program allowing a computer to execute a depth measurement method, wherein the depth measurement method comprises:

• a selection step of selecting, from a plurality of color planes of the color image, at least two color planes with different image formation positions;
• an adjusting step of adjusting a luminance difference between the selected color planes;
• and
• a calculation step of calculating the depth information, using a difference in blur between the color planes for which the luminance difference has been adjusted.