Image processing device, image processing method, and recording medium
US10997695B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Mar 3, 2017 |
| Grant date | May 4, 2021 |
| Priority date | — |
| Expiry date | Dec 5, 2037 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T2207/20182
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
The present invention suppresses noise that is possibly generated due to threshold processing during frequency conversion. The image processing device 100 includes: a threshold processing unit 110 for executing threshold processing, by using a first parameter for conversion coefficients of respective frequency components that are obtained by frequency conversion of a block consisting of multiple pixels; a calculation unit 120 for calculating feature quantities of the constituent multiple pixels of the block; a determination unit 130 for determining a second parameter on the basis of the calculated feature quantities; and a correction unit 140 for correcting, by using the determined second parameter, the threshold-processed conversion coefficients of the respective frequency components.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.