Automated system for testing an imaging sensor
US5726915A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 17, 1995 |
| Grant date | Mar 10, 1998 |
| Priority date | — |
| Expiry date | Oct 17, 2015 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05B9/02
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An automated system and method for testing a sensor by evaluating the output thereof with respect to a known target. The advantageous method includes the step of acquiring an output signal from the sensor in response to a known target, said output including signature signal S, random noise N.sub.R and fixed pattern noise N.sub.FP. Next, the sensor output signal is processed to provide a first signal which includes essentially signature signal S and fixed pattern noise N.sub.FP, a second signal which includes essentially random noise N.sub.R and a third signal which includes essentially fixed pattern noise N.sub.FP. The third signal is adaptively filtered to provide a filtered signal fixed pattern noise signal N'.sub.FP. The filtered signal N'.sub.FP is subtracted from the first signal to extract a signature S. In a particular embodiment, the signature is processed to acquire a modulation transfer function and a signal peak baseline therefrom. The modulation transfer function, signal peak baseline and random noise signals are processed to acquire a minimum resolvable temperature of said sensor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.