Image-processing device, image-capturing device, image-processing method, and recording medium

摘要

A restoration process using a restoration filter that is based on a point spread function for an optical system is performed for original image data acquired from an image-capturing element by an image taking of an object image using the optical system, so that recovery image data are acquired. The above restoration process is performed, in a point-image restoration processing section, for color data of the original image data in which a gradation correction has been performed by a logarithmic process. The restoration filter may be configured by a filter coefficient corresponding to the image data before the logarithmic process, or may be configured by a filter coefficient corresponding to the image data after the logarithmic process. Thus, by performing the restoration process capable of flexibly responding to various properties of the original image, it is possible to reduce the image degradation such as the ringing in the recovery image.

主权项

1. An image-processing device to acquire recovery image data by performing a restoration process for original image data, the original image data being acquired from an image-capturing element by an image taking of an object image using an optical system, the restoration process using at least a restoration filter that is based on a point spread function for the optical system,
the image-processing device comprising: a gradation correction section to perform a gradation correction by a logarithmic process, for the original image data; and a restoration processing section to perform the restoration process, for color data of the original image data after the gradation correction, wherein the restoration filter has a-filter coefficients corresponding to image data before the logarithmic process.