Process for measuring the optical quality of a glass product
US5694479A · kind A · utility
17Cited by
3References
7Claims
0Family size
Assignee
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Key dates
| Filing date | Jun 2, 1995 |
| Grant date | Dec 2, 1997 |
| Priority date | — |
| Expiry date | Jun 2, 2015 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2021/9586
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
For evaluating the optical quality of a glass product utilizing a projection technique, a camera and a computer, the image observed is compared with a reference image reconstructed by means of a convolution window which is displaced over the entire projected image. The illumination at the boundaries is reconstructed by an extrapolation by two-dimensional linear regression.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.