Image enhancing device and image enhancement method
US9495732B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jun 6, 2013 |
| Grant date | Nov 15, 2016 |
| Priority date | — |
| Expiry date | Jun 6, 2033 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T2207/20192
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An image is sharpened by using a frequency component higher than Nyquist frequency.An image enhancing device 1 according to an embodiment of the present invention for generating an output image by sharpening an input image, includes: a filter unit 10 configured to generate a first signal by eliminating at least a direct current component of a frequency component included in an input image signal representing the input image; a nonlinear processing unit 20 configured to generate a second signal by carrying out, to the first signal, nonlinear processing asymmetric between a positive area and a negative area of the first signal; a limiter 30 configured to generate a third signal by adjusting the second signal; and an adder 50 configured to generate an output image signal representing the output image by adding the third signal to the input image signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.