Method for comparing recorded pixel images representing equipotential lines of at least an integrated circuit chip
US6816614B1 · kind B1 · utility
1Cited by
1References
21Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 10, 2001 |
| Grant date | Nov 9, 2004 |
| Priority date | — |
| Expiry date | May 10, 2021 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T2207/30148
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The invention concerns a method for comparing two recorded pixelated source images (2a, 2b) of the same rectangular format representing in contrasted form the equipotential lines on an integrated circuit chip. The method consists in subjecting each source image (2a, 2b) to an adaptive thresholding processing with three contrast levels, then forming a result image (14) from the processed source images (3a, 3b) by assigning to each pixel a contrast level defined according to a logical rule of comparison.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.