IMAGE-PROCESSING DEVICE, IMAGE-CAPTURING DEVICE, IMAGE-PROCESSING METHOD, AND RECORDING MEDIUM

摘要

According to an aspect of the present invention, for which of the original image data before the gradation correction and the original image data after the gradation correction the restoration process is performed is determined depending on whether or not the image information meets the condition under which the ringing appears in the recovery image data due to the restoration process. When the gradation correction is performed after the restoration process, there is a probability that the side effect (the ringing or the like) of the restoration process is emphasized by the gradation correction. Therefore, in the case where the image information meets the condition under which the ringing appears, it is possible to prevent such a side effect (the ringing or the like) of the restoration process from being emphasized by the gradation correction, by performing the restoration process for the original image data after the gradation correction.

主权项

1. An image-processing device comprising:
an image information acquisition section to acquire image information that contains at least any one of image analysis data and image acquisition condition data, the image analysis data being acquired by an analysis of original image data that are acquired from an image-capturing element by an image taking using an optical system, the image acquisition condition data indicating an acquisition condition of the original image data; a restoration processing section to obtain recovery image data by performing a restoration process for the original image data, the restoration process using a restoration filter that is based on a point spread function for the optical system; a ringing decision section to decide whether or not the image information meets a condition under which a ringing appears in the recovery image data due to the restoration process; and a process control section to control an image process, based on a decision result by the ringing decision section, wherein the restoration process is performed for the original image data after a gradation correction, wherein the gradation correction is a gradation correction by a logarithmic process, and the restoration filter has a filter coefficient corresponding to image data before the logarithmic process.