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Abstract
An inexpensive imaging system able to take various narrow‐band images and placed on platforms of various heights can be very useful to many remote‐sensing studies, particularly for researchers in precision agriculture areas. A handy imaging system, composed of an Electrim EDC‐1000L monochrome camera, a Canon PHF6 1.4 lens, a set of Andover bandpass filters, and an Advantech PCA6751 single board computer, was built up and installed with corresponding self‐developed application software. The system had been deployed on platforms such as a mobile high‐lift crane and helicopter to acquire various narrow‐band images. This simplified imaging system may help greatly in performing validation tests on many stress‐identification indices and related algorithms derived from ground spectroradiometer measurements.
Acknowledgements
Financial support for this research came from projects (91AS‐5.1.3‐CI‐C2, 92AS‐1.1.6‐CI‐C1, and 93AS‐1.1.6‐FD‐Z1) of the Council of Agriculture, Taiwan ROC. We thank Dr Chwen‐Ming Yang at Taiwan Agricultural Research Institute for kindly lending us the high‐lift crane. The Instrument Technology Research Center machine shop helped to fabricate the rotating filter tray and camera assemblies.