Method and system for transferring a bit-mapped image using vertical and horizontal rules
US5768435A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 31, 1994 |
| Grant date | Jun 16, 1998 |
| Priority date | — |
| Expiry date | Mar 31, 2014 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06K2215/0011
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Methods of recognizing rules, solid lines or rectangles, in a bit-mapped image and of using those rules to enable a suitable printer or other suitable device to receive the bit-mapped image quickly. In a preferred embodiment, the methods include the steps of recognizing rules, forming rule descriptors for the rules, and then transmitting the rule descriptors to the receiving device. Vertical rules are recognized by partitioning the bit-mapped image into a plurality of adjacent horizontal stripes of row data, dividing that horizontal stripe into data columns formed from vertically aligned row data bits, and ANDing the data bits in each vertically aligned column to identify, by a HIGH output from the AND function, vertical lines which span the horizontal stripe. Adjacent or continuous vertical lines are then identified. Horizontal rules are identified by dividing the row data into bytes, ANDing individual bits of each byte together, and recognizing a horizontal line by a HIGH output from the AND function. Adjacent horizontal lines are identified and combined. Horizontal rule descriptors are then formed and sent to the printer or other receiving device.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.