Video densitometer with determination of color composition
US5420628A · kind A · utility
51Cited by
13References
54Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 3, 1994 |
| Grant date | May 30, 1995 |
| Priority date | — |
| Expiry date | Jun 3, 2014 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2021/5919
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The measurement of gray scale or color composition integrated densities of irregularly shaped areas of a subject specimen is accomplished by using a video camera to derive an analog video image signal representative of the optical intensity of light associated with the specimen. A modified low cost high speed video digitizer converts the video image signal into a digital format which an interactive computer program converts into digital optical density values that are used to determine the net integrated density of each irregularly shaped area within the specimen.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.