Image processing device, imaging device, and image processing method

摘要

An image processing device includes: a luminance saturation position detection unit which detects a luminance saturation position to produce a light source image; a flare model production unit which produces a flare model image based on the light source image and optical characteristics data of the optical system; a flare position setting unit which sets, as a flare position, a predetermined image position in the captured image and located near the luminance saturation position and on a side of an optical axis relative to the luminance saturation position; a flare model luminance adjustment unit which produces the estimated flare image by adjusting luminance gain of the flare model image, based on a relationship between a luminance value of the captured image at the flare position and a luminance value of the flare model image at the flare position; and an unnecessary light subtraction unit which subtracts the estimated flare image from the captured image.

主权项

1. An image processing device which reduces an unnecessary light component in an image captured through an optical system including a diffractive optical element, said image processing device comprising:
a flare image estimation unit configured to produce an estimated flare image that appears around a bright object in the captured image; and an unnecessary light subtraction unit configured to subtract the estimated flare image from the captured image, wherein said flare image estimation unit includes:
a luminance saturation position detection unit configured to detect a luminance saturation position to produce a light source image, the luminance saturation position being an image position in the captured image at which a luminance value is greater than a predetermined value;a flare model production unit configured to produce a flare model image based on the light source image and optical characteristics data of the optical system;a flare position setting unit configured to set, as a flare position, a predetermined image position, which is an image position in the captured image and located near the luminance saturation position and on a side of an optical axis relative to the luminance saturation position; anda flare model luminance adjustment unit configured to produce the estimated flare image by adjusting a gain of a luminance of the flare model image, based on a relationship between a luminance value of the captured image at the flare position and a luminance value of the flare model image at the flare position.