| 摘要 |
An apparatus includes: a spatial differential value calculation unit that calculates a primary spatial differential value and a secondary spatial differential value of a brightness value with respect to each of a plurality of directions in each pixel of the image; a maximum and minimum direction estimation unit that estimates a maximum direction and a minimum direction for each pixel, the maximum direction being a direction with which the primary spatial differential value is a maximum value, the minimum direction being a direction with which the primary spatial differential value is a minimum value; and an evaluated value calculation unit that calculates a first evaluated value of each pixel using the primary spatial differential value in the maximum direction, the primary spatial differential value in the minimum direction, and the secondary spatial differential value in the maximum direction. |
