JP2018088587A5 - - Google Patents

Claims (15)

A captured image having a plurality of color components, and an optical characteristic of an imaging optical system used for capturing the captured image;
A selecting step of selecting a reference color component from the color components, using at least one of the optical characteristics or edge information for each color component of the captured image;
A reference acquisition step of acquiring a reference image based on the reference color component;
Using the reference image and the optical characteristics, so as to reduce the difference between the width of the edge in the color component and the width of the edge in the reference image, a correction step of correcting optical degradation in the color component, An image processing method comprising:   The image processing method according to claim 1, wherein the selecting step selects the reference color component for each of a plurality of partial regions obtained by dividing the captured image.   The said selection process acquires the performance value for every said color component in the said imaging optical system from the said optical characteristic, and selects the said reference color component based on the said performance value, The Claim 1 or 2 characterized by the above-mentioned. Image processing method. It said performance value, the peak value of the point spread function, the half-value width of the point spread function, the variance of the point spread function, of the values of the modulation transfer function at Jo Tokoro spatial frequency, include either The image processing method according to claim 3, wherein: The selecting step selects the reference color component using the edge information,
The method according to claim 1, wherein in the correcting step, a weight of the reference image for correction is determined based on a color component to be corrected and the optical characteristics of the reference color component. 2. The image processing method according to 1., The selecting step selects the reference color component using the edge information,
The correction step acquires a performance value of a color component in the imaging optical system from the optical characteristics, and when the performance value of the color component to be corrected is larger than the performance value of the reference color component, the correction of the reference image for the correction. The image processing method according to claim 1, wherein the weight is reduced or the reference image is not used for correction.   The image processing method according to any one of claims 1 to 6, wherein the selection step uses the edge information on which chromatic aberration of magnification has been corrected.   The image processing method according to any one of claims 1 to 7, wherein the correcting step corrects the optical deterioration of the color component on which the chromatic aberration of magnification has been corrected.   9. The image processing method according to claim 1, wherein the optical characteristic used in the correction step is a point spread function of the imaging optical system corresponding to the color component. . The image processing method according to claim 1, wherein the edge information includes an edge intensity or a width.   11. The optical characteristic according to claim 1, wherein the optical characteristic is determined using any one of a photographing distance when the photographed image is photographed, an aperture value of the imaging optical system, and a focal length. Item 2. The image processing method according to item 1. A captured image having a plurality of color components, and an optical characteristic of an imaging optical system used for capturing the captured image, an input data acquisition unit that acquires
A selection unit that selects a reference color component from the color components by using at least one of the optical characteristics or edge information for each color component of the captured image;
A reference acquisition unit that generates a reference image based on the reference color component;
A correction unit that corrects optical degradation in the color component so as to reduce a difference between an edge width in the color component and an edge width in the reference image using the reference image and the optical characteristics. An image processing apparatus comprising: An imaging optical system that forms an image of a subject space;
An image sensor having a plurality of pixels having different color components and acquiring the image as a captured image,
An image pickup apparatus comprising: the image processing apparatus according to claim 12.   An image processing program for causing a computer to execute the image processing method according to claim 1.   A computer-readable recording medium recording the image processing program according to claim 14.