IMAGE PROCESSING APPARATUS AND IMAGE PROCESSING METHOD

摘要

An image is sharpened by using a frequency component exceeding a Nyquist frequency. In particular, an image processing apparatus 100 of the disclosure herein for generating an output image by sharpening an input image includes a first nonlinear processing unit 101 configured to generate a first signal by carrying out nonlinear processing on an input image signal representing the input image, a sharpening processing block 102 configured to generate a second signal containing a frequency component higher than a frequency component contained in the first signal by carrying out sharpening processing on the first signal, and an adder 103 configured to generate an output image signal representing the output image by adding the second signal to the input image signal.

主权项

1. An image processing apparatus for generating an output image by sharpening an input image, comprising:
a first nonlinear processing unit configured to generate a first signal by carrying out nonlinear processing on an input image signal representing the input image by using an upward-convex nonlinear function; a sharpening processing block configured to generate a second signal containing a frequency component higher than a frequency component contained in the first signal by carrying out sharpening processing having nonlinear arithmetic on the first signal; and an adder configured to generate an output image signal representing the output image by adding the second signal to the input image signal.