Image processing method
US6173086A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 15, 1997 |
| Grant date | Jan 9, 2001 |
| Priority date | — |
| Expiry date | Jul 15, 2017 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T2207/20064
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A wavelet transform is carried out on an image signal representing an image, in which periodical structure patterns corresponding to a frequency higher than a Nyquist frequency in sub-sampling effected with the wavelet transform are embedded, by using at least one kind of low pass filter capable of decreasing the frequency components of the image signal, which correspond to the periodical structure patterns. A reduced image, which is represented by low frequency components of the image signal, is thereby obtained from the wavelet transform such that no moire may occur in the reduced image. The reduced image thus having good image quality is utilized as an image to be viewed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.