Imaging apparatus and image restoration method

An imaging apparatus comprising:

• an optical system;
• a subject capturing unit configured to acquire subject information captured by said optical system, and output the acquired subject information;
• and
• an image restoration unit configured to perform a restore operation for restoring the subject information, based on corrected point spread function (PSF) information stored in advance and the subject information,
• wherein the corrected PSF information is information generated by correcting optical transfer function (OTF) information so as to decrease a ratio of a gain of a direct-current component to a gain of a low-frequency component that is not the direct-current component, the OTF information being obtained by converting PSF information captured by said optical system into frequency-domain data.

An image restoration method comprising:

• acquiring point spread function (PSF) information captured by an optical system, correcting the PSF information, and outputting the corrected PSF information;
• acquiring subject information captured by the optical system, and outputting the acquired subject information;
• and
• performing a restore operation for restoring the subject information, based on the corrected PSF information and the subject information,
• wherein said acquiring of PSF information includes:
• converting the PSF information into frequency-domain data, and outputting optical transfer function (OTF) information obtained as a result of the conversion;
• and
• correcting the OTF information so as to decrease a ratio of a gain of a direct-current component to a gain of a low-frequency component that is not the direct-current component.