Patent Document ID: 9041833
Application ID: 13119859
Patent Status: 1

Claim One:
1. An image processing method for processing an image generated by image pickup using an optical system, the method comprising: a step of acquiring the image; an image restoration step of performing image restoration processing to reduce a blur component of the image using an image restoration filter created on a basis of an optical transfer function of the optical system; and a distortion correction step of performing geometric transformation processing to reduce a distortion component of the image on which the image restoration processing has been performed, only after performing the image restoration step, wherein no other geometric transformation processing to reduce a distortion component of the image is performed before the image restoration step, wherein the image restoration step performs the image restoration processing using image information of an area to be removed by the geometric transformation processing in the image, and wherein the following relationship is satisfied: 
 0< F/D< 2, where D represents a number of pixels by which an edge pixel of an effective image area in the image on which the image restoration processing has been performed is shifted in a specific direction by the geometric transformation processing, and F represents a number of cells in the specific direction in the image restoration filter applied to the edge pixel.