Patent Document ID: 9020296
Application ID: 13773802
Patent Status: 1

Claim One:
1. An image conversion apparatus for converting an input image into an output image, the apparatus comprising a processor and a memory including instructions which, when executed by the processor, configure the apparatus to: execute, based on a first value used to obtain a first coordinate value in a nonlinear-transformed image, which corresponds to a coordinate value of one pixel in the output image, a first calculation for obtaining a second value used to obtain a second coordinate value in the nonlinear-transformed image, which corresponds to a coordinate value of a pixel adjacent to the one pixel in the output image; execute a second calculation for obtaining the second coordinate value using the second value obtained by the first calculation; execute coordinate conversion of converting the second coordinate value obtained by the second calculation into a third coordinate value in the input image; and execute image conversion of converting the input image into the output image, based on the third coordinate value converted by the coordinate conversion, wherein the nonlinear-transformed image corresponds to an image obtained by performing a predetermined nonlinear transformation on the input image, wherein the output image corresponds to an image obtained by transforming the nonlinear-transformed image using a transformation matrix, and wherein one of addition and subtraction is iteratively executed using a result of the first calculation and a predetermined constant so as to sequentially output a value corresponding to a multiplication result obtained by multiplying a coordinate value of each of a plurality of adjacent pixels in the output image by the predetermined constant.