IMAGE PROCESSING APPARATUS AND IMAGE PROCESSING METHOD

摘要

PROBLEM TO BE SOLVED: To output a more natural image by considering noise depending on luminance and suppressing a discontinuous change of noise volume in specific luminance.SOLUTION: An image processing apparatus includes: a reference gradation conversion characteristic-setting unit 50 for setting a reference gradation conversion characteristic which is a reference in gradation conversion processing; a contrast amplification factor calculator 51 for calculating a contrast amplification factor for a luminance value based on the reference gradation conversion characteristic; a composition number determination unit 52 for determining the number of composite images corresponding to the luminance value based on the contrast amplification factor; and a composition ratio determination unit 53 for determining a composition ratio so that the composition ratio is continuously changed in a predetermined luminance value range including the luminance value in which the number of composite images is changed.