Method for real-time auto-cropping a scanned image
US6453080B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Oct 15, 1999 |
| Grant date | Sep 17, 2002 |
| Priority date | — |
| Expiry date | Oct 15, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N1/3872
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The method of the invention involves in finding the width and length of a scanned image in real time and then write the length and width into the header of a bitmap file as soon as the bottom line of the scanned image is found. The width of the scanned image can be computed from the width of the first occurrence of the meaningful image region. The width will be transferred to the scanner to reset the scan width for reading subsequent image data. The length of the scanned image cannot be determined until a bottom line is found. Each meaningful image region can be simultaneously written into the bitmap file while examining the bottom line of the scanned image. To find the bottom line, for each meaningful image region, sample a plurality of line areas to determine if the meaningful image region contains the bottom line. For each meaningful image region examined, sum up the total number of image lines until the bottom line is reached. Eventually, when the bottom line is found, the width and length of the scanned image will be written into the header of the bitmap file.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.