Methods and apparatuses for measuring an extent of a group of objects within an image
US6571006B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 30, 1998 |
| Grant date | May 27, 2003 |
| Priority date | — |
| Expiry date | Nov 30, 2018 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F18/211
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Methods are disclosed that measure the extent of a group of objects within a digital image by comparing signature, representative of the relationship of the objects to one another, against instances of a measured signature at varying positions within the image. The position(s) where the signature(s) vary by a predetermined comparison criterion indicates the extent of the group of objects. It is disclosed that the comparison to a reference signature allows proper identification of measured signatures despite noise in the digital image. A preferred embodiment uses the CALIPER TOOL to generate signatures of edges, where the window of the CALIPER TOOL has a projection axis substantially parallel to the extent being measured. A preferred application is desired wherein the method measure the length of leads in a lead set.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.