Efficient scaling in transform domain
US7474805B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 27, 2007 |
| Grant date | Jan 6, 2009 |
| Priority date | — |
| Expiry date | Aug 27, 2027 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T3/4084
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Methods and systems for efficient scaling in the transform domain are provided when transform coefficient data is provided as an input to a data processing system, comprising generating a first matrix from transform coefficient data; zeroing out a row or column of, or inserting a row or column of zeros into, the first matrix; generating a second matrix by applying a one-dimensional inverse transform to the first matrix with the zeroed-out at least one row, the at least one column, the inserted at least one row of zeros or the at least one column of zeros; generating a third matrix by regrouping the second matrix; generating a combined matrix by applying a forward transform to the third matrix; and the data processing system scaling the data represented by the transform coefficient data by applying the combined matrix to the transform coefficient data.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.