A simple method for vignette correction of airborne digital camera data
- San Diego State Univ., San Diego, CA (United States); and others
Airborne digital camera systems have gained popularity in recent years due to their flexibility, high geometric fidelity and spatial resolution, and fast data turn-around time. However, a common problem that plagues these types of framing systems is vignetting which causes falloff in image brightness away from principle nadir point. This paper presents a simple method for vignetting correction by utilizing laboratory images of a uniform illumination source. Multiple lab images are averaged and inverted to create digital correction templates which then are applied to actual airborne data. The vignette correction was effective in removing the systematic falloff in spectral values. We have shown that the vignette correction is a necessary part of the preprocessing of raw digital airborne remote sensing data. The consequences of not correcting for these effects are demonstrated in the context of monitoring of salt marsh habitat. 4 refs.
- OSTI ID:
- 390707
- Report Number(s):
- CONF-960613-; TRN: 96:004292-0010
- Resource Relation:
- Conference: 2. international airborne remote sensing conference and exhibition, San Francisco, CA (United States), 24-27 Jun 1996; Other Information: PBD: 1996; Related Information: Is Part Of Proceedings of the second international airborne remote sensing conference and exhibition: Technology, measurement & analysis. Volume III; PB: 870 p.
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
99 MATHEMATICS
COMPUTERS
INFORMATION SCIENCE
MANAGEMENT
LAW
MISCELLANEOUS
44 INSTRUMENTATION
INCLUDING NUCLEAR AND PARTICLE DETECTORS
ECOSYSTEMS
AERIAL MONITORING
CAMERAS
CALIBRATION
IMAGES
BRIGHTNESS
LENSES
ILLUMINANCE
MARSHES
DIGITAL SYSTEMS
IMAGE SCANNERS
IMAGE PROCESSING
CHARGE-COUPLED DEVICES
CORRECTIONS
MATHEMATICAL MODELS
DIGITAL FILTERS