Coordinate transformation method for binary image
US5818962A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 20, 1996 |
| Grant date | Oct 6, 1998 |
| Priority date | — |
| Expiry date | Mar 20, 2016 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T3/00
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A binary image coordinate transformation method can simplify the transformation processing for those portions consisting of pixels having the same single color value, thereby increasing the processing speed of binary image transformation overall. The original image is divided into a plurality of sub-regions. For each sub-region, it is detected whether or not the sub-region consists of pixels having the same color value of two color values of a binary image. The post-transformed image is divided into a plurality of sub-blocks. For each sub-block, all the sub-regions containing pixels corresponding to those pixels included in a sub-block are detected. When it is determined that the all the detected sub-regions corresponding to the sub-block have the same color value, the sub-block of the post-transformed image is covered with that single color in one go.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.