| dc.contributor.author |
Wang, W |
en |
| dc.contributor.author |
Li, C |
en |
| dc.contributor.author |
Tollner, EW |
en |
| dc.contributor.author |
Rains, GC |
en |
| dc.contributor.author |
Gitaitis, RD |
en |
| dc.date.accessioned |
2014-06-06T06:51:35Z |
|
| dc.date.available |
2014-06-06T06:51:35Z |
|
| dc.date.issued |
2012 |
en |
| dc.identifier.issn |
01681699 |
en |
| dc.identifier.uri |
http://dx.doi.org/10.1016/j.compag.2011.09.003 |
en |
| dc.identifier.uri |
http://62.217.125.90/xmlui/handle/123456789/5579 |
|
| dc.subject |
Characterization |
en |
| dc.subject |
Inspection |
en |
| dc.subject |
LCTF |
en |
| dc.subject |
Shortwave infrared |
en |
| dc.subject |
Spectral imaging |
en |
| dc.subject |
System calibration |
en |
| dc.subject.other |
Calibration method |
en |
| dc.subject.other |
Calibration tests |
en |
| dc.subject.other |
Critical steps |
en |
| dc.subject.other |
Design criterion |
en |
| dc.subject.other |
Exposure-time |
en |
| dc.subject.other |
Field of views |
en |
| dc.subject.other |
Image distortions |
en |
| dc.subject.other |
LCTF |
en |
| dc.subject.other |
Liquid crystal tunable filter |
en |
| dc.subject.other |
Other applications |
en |
| dc.subject.other |
Short wave infrared |
en |
| dc.subject.other |
Spatial resolution |
en |
| dc.subject.other |
Spectral domains |
en |
| dc.subject.other |
Spectral imaging |
en |
| dc.subject.other |
Spectral imaging system |
en |
| dc.subject.other |
Spectral noise |
en |
| dc.subject.other |
Spectral sensitivity |
en |
| dc.subject.other |
System calibration |
en |
| dc.subject.other |
System output |
en |
| dc.subject.other |
System spectral |
en |
| dc.subject.other |
Characterization |
en |
| dc.subject.other |
Imaging systems |
en |
| dc.subject.other |
Infrared radiation |
en |
| dc.subject.other |
Inspection |
en |
| dc.subject.other |
Liquid crystals |
en |
| dc.subject.other |
Signal to noise ratio |
en |
| dc.subject.other |
Spectroscopy |
en |
| dc.subject.other |
System stability |
en |
| dc.subject.other |
Calibration |
en |
| dc.subject.other |
accuracy assessment |
en |
| dc.subject.other |
calibration |
en |
| dc.subject.other |
crystal |
en |
| dc.subject.other |
filter |
en |
| dc.subject.other |
sensitivity analysis |
en |
| dc.subject.other |
shortwave radiation |
en |
| dc.subject.other |
signal-to-noise ratio |
en |
| dc.subject.other |
spectral resolution |
en |
| dc.title |
A liquid crystal tunable filter based shortwave infrared spectral imaging system: Calibration and characterization |
en |
| heal.type |
journalArticle |
en |
| heal.identifier.primary |
10.1016/j.compag.2011.09.003 |
en |
| heal.publicationDate |
2012 |
en |
| heal.abstract |
Calibration is a critical step for developing spectral imaging systems. This paper presents a systematic calibration and characterization approach for a liquid crystal tunable filter (LCTF) based shortwave infrared (SWIR) spectral imaging system. A series of tests were conducted to validate the linearity of the system output, measure the field of view of the spectral imager, increase the system spectral sensitivity, test the spatial and spectral resolution of the system, evaluate the system stability and image distortion, and reduce the spectral noise of the system output. Results showed that the system had an angle of view of 6.98° and a spatial resolution of 158 μm. The spectral sensitivity of the system was corrected by controlling the camera exposure time and gain, which increased the signal to noise ratio of the system by 16.5%. Test results also verified the system spectral accuracy and linearity (r> 0.999). The system output was proven to be stable and image distortion was not perceivable. Results of calibration tests indicated that this system satisfied the design criteria in both spatial and spectral domains. The calibration methods presented here are applicable to the LCTF-based spectral imaging systems in other applications. © 2011. |
en |
| heal.journalName |
Computers and Electronics in Agriculture |
en |
| dc.identifier.volume |
80 |
en |
| dc.identifier.doi |
10.1016/j.compag.2011.09.003 |
en |
| dc.identifier.spage |
135 |
en |
| dc.identifier.epage |
144 |
en |