Image content autofocus for microscopy using a noise-insensitive focus filter
US6341180B1 · kind B1 · utility
16Cited by
12References
15Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 16, 1998 |
| Grant date | Jan 22, 2002 |
| Priority date | — |
| Expiry date | Dec 16, 2018 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T3/403
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
An autofocusing system in which optimal or nearly optimal linear filters are selected for filtering an image signal so that the components of the image signal which contain image content, and thus, focus information are amplified while the components of the image signal which contain noise are damped. One set of nearly optimal linear filters are modified second order difference filters in which the number of internal zeros are modified to tune the filter to the particular equipment.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.