IMAGE PROCESSING APPARATUS AND IMAGE PROCESSING METHOD

摘要

An interpolation process using a convolution operation is carried out on a non-planar document, a captured image having distortion caused by an optical system, or the like having changed a breadth of a reference region used in a convolution operation or frequency characteristics of a sampling function that is used, in accordance with distortion characteristics in an input image.

主权项

1. An image processing apparatus that processes image data configured of pixels disposed in grid form, the apparatus comprising:
an obtainment unit that obtains distortion characteristics indicating characteristics of distortion in a target contained in original image data obtained by capturing an image of the target; and a correction unit that, using a sampling function, interpolates a pixel of interest in the original image data, based on pixels of the original image data present in a reference region in the periphery of the location of the pixel of interest, wherein the correction unit changes a range of the reference region, frequency characteristics of the sampling function, or both in accordance with the distortion characteristics.