Restoration filter generation device and method, image processing device, imaging device, and non-transitory computer-readable medium

摘要

A restoration filter generation device that generates a restoration filter for a restoration process on the basis of a point spread in an optical system, the restoration process being performed on luminance system image data as image data concerning a luminance which is generated on the basis of image data for each color of plural colors acquired by an image pickup device having the optical system, the restoration filter generation device includes a first transfer function acquisition device, a correction information acquisition device, a second transfer function acquisition device, a third transfer function calculation device, and a restoration filter generation device that generates the restoration filter for the restoration process on the basis of the third transfer function calculated by the third transfer function calculation device.

主权项

1. A restoration filter generation device that generates a restoration filter for a restoration process on the basis of a point spread in an optical system, the restoration process being performed on luminance system image data as image data concerning a luminance which is generated on the basis of image data for each color of plural colors acquired by an image pickup device having the optical system, the restoration filter generation device comprising:
a first transfer function acquisition device that acquires a first transfer function regarding the point spread in the optical system for each color of the plural colors; a correction information acquisition device that, in a case where magnification chromatic aberration caused by the optical system is corrected by scaling up or down the image data for each color of the plural colors, acquires correction information indicating a correction amount or a correction residual amount of the magnification chromatic aberration, for each color of the plural colors; a second transfer function acquisition device that acquires a second transfer function obtained by parallelly translating the first transfer function for each color of the plural colors so as to offset the correction residual amount on the basis of the correction information acquired by the correction information acquisition device; a third transfer function calculation device that calculates a third transfer function with respect to the luminance system image data by mixing the second transfer functions for respective colors of the plural colors acquired by the second transfer function acquisition device; and a restoration filter generation device that generates the restoration filter for the restoration process on the basis of the third transfer function calculated by the third transfer function calculation device.