Method and apparatus for visually comparing files in a data processing system
US5142619A · kind A · utility
83Cited by
14References
2Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Aug 23, 1991 |
| Grant date | Aug 25, 1992 |
| Priority date | — |
| Expiry date | Aug 23, 2011 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F7/02
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A method and apparatus for visually comparing two files or portions thereof by visually indicating to the user areas of identity and differences between the items being compared. The items are stored in a video RAM which controls the visual presentation on the screen. The respective pixel settings in the video RAM are exclusively or'ed and the results are then stored in the video RAM so that the difference between the two items are displayed. A user can edit each item, while the comparison is being made, so that the effect of the editing on the differences, is immediately shown and apparent to the user.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.