Accuracy evaluation of the ground-based fractional vegetation cover measurement by using simulated images
- Resource Type
- Conference
- Authors
- Zhao, Jiqiang; Xie, Donghui; Mu, Xihan; Liu, Yaokai; Yan, Guangjian
- Source
- 2012 IEEE International Geoscience and Remote Sensing Symposium Geoscience and Remote Sensing Symposium (IGARSS), 2012 IEEE International. :3347-3350 Jul, 2012
- Subject
- Geoscience
Signal Processing and Analysis
Computing and Processing
Communication, Networking and Broadcast Technologies
Components, Circuits, Devices and Systems
Image color analysis
Vegetation mapping
Digital images
Accuracy
Soil
Cameras
Computer simulation
Digital photography
FVC
physically based ray-tracing
simulated images
accuracy evaluation
- Language
- ISSN
- 2153-6996
2153-7003
Digital photography is now the most widely used method to obtain the Fractional Vegetation Cover (FVC) in field measurements. Its accuracy is affected by shooting conditions and classification methods of digital images. In this paper, we chose summer maize as the study plant, used computer simulation method to control the shooting conditions strictly and generate simulated scene. Then a physically based ray-tracing (PBRT) algorithm was used to render the scene to obtain simulated images under different shooting conditions. Supervised classification and CIE L*a*b* color space threshold method were used to extract FVC values from the simulated images. Comparing the extracted FVC values with the scene's true FVC value, we evaluated the FVC accuracy of different shooting conditions and classification methods. The results can act as a guidance of digital photography to obtain the FVC.