Method for reducing amount of stored digital image data without degrading a reconstituted image
US5212565A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 19, 1990 |
| Grant date | May 18, 1993 |
| Priority date | — |
| Expiry date | Nov 19, 2010 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N19/593
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Image area data in an uncompressed data field is digitized as binary data and subsectioned into data bit blocks. The subsections are compressed whereby each subsection is represented in terms of its predominant data values plus non-redundant data occurrences. Several predominant values are chosen from the subsection of interest. Each of the predominant values is assigned a bit code and data values from the subsection that are identical to a predominant value are assigned a code corresponding to the predominant value. Uncoded remaining data values and the coded data values are stored in a variable length record so that each data location within the record spatially corresponds to the location of the original data in the uncompressed data field.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.