Adaptive wavelet coding of hyperspectral imagery
US6539122B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Mar 30, 1998 |
| Grant date | Mar 25, 2003 |
| Priority date | — |
| Expiry date | Mar 30, 2018 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T9/007
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A hyperspectral image encoder (10) for compressing hyperspectral imagery includes a differential pulse code modulation (DPCM) loop (26) to perform data decorrelation in the spectral domain and a discrete wavelet transform (DWT) processing means (28) to perform decorrelation in the spatial domain. The DPCM loop (26) determines an error image between a present image at the input of the encoder (10) and a predicted image. The DWT processing means (28) then divides the error image into a plurality of frequency subbands and quantizes information within the subbands in accordance with a plurality of predetermined quantization states to provide a coded output signal. In one embodiment, an interband predictor (24) is provided to predict an image, for use in calculating the error image, using the coded output signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.