Method and apparatus for transforming image data
US5907665A · kind A · utility
8Cited by
5References
19Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 11, 1995 |
| Grant date | May 25, 1999 |
| Priority date | — |
| Expiry date | Oct 11, 2015 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N1/41
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method for transforming grayscale image data in accordance with preselected transformation factors may be accomplished by first reducing the number of gray image pixels by "punching to black" gray image pixels having intensity values less than a black punch value and by "punching to white" gray image pixels having intensity values greater than a white punch value. The resulting "punched" image data are then transformed in accordance with preselected transformation factors to create transformed image data. The transformed image data are then converted to binary image data, which may be reproduced in a conventional manner.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.