This was the second of two experiments conducted in a barley field near Foulum. The purpose of the experiments was to measure gap fraction and canopy structure using a high-dynamic-range RGB (HDR-RGB) camera. The camera was mounted on the API field robot. In addition, a multi-spectral CROPSCAN sensor was mounted on the API for reference measurements. At each sample site, the crops were photographed from 12 different compass angles. The camera was mounted in a 30 degrees zenith angle.
At this experiment, reference measurements of LAI were made with the Licor LAI-2000 instrument. Furthermore, the crops were cut for direct reference measurements of leaf area and other parameters.
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Waiting for the rain to stop. The GPS base station can be seen in the background to the left. |
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Details of the barley crops. Note the yellow miscolouring of some leaf tips due to recent spraying with liquid manure. |
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The API performing a circle sampling. MOVIE (34 MB, WMV) here. |
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Example of an HDR-RGB canopy image. |
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Example of an HDR-RGB canopy image. |
Last modified: 12 August 2004 (Kristian Kirk)