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Measuring Cotton Plant Height Using High Resolution Aerial Images

Published by the American Society of Agricultural and Biological Engineers, St. Joseph, Michigan www.asabe.org

Citation:  2016 ASABE Annual International Meeting  162460894.(doi:10.13031/aim.20162460894)
Authors:   Rui Xu, Yu Jiang, Changying Li, Andrew Paterson
Keywords:   cotton, aerial application, agriculture

Abstract. The use of unmanned aerial systems for field phenotyping has drawn researchers‘ interest in recent years for their high throughput and the non-destructive manner of data collection. In this paper, we demonstrated a high-throughput method to measure cotton plant height using aerial color images. Aerial images of 24 cotton plots were obtained using a digital camera with a ground resolution of 3 mm/pixel. Plant height for each plot was manually measured for reference. Point clouds of the cotton plots were generated using Agisoft PhotoScan. A data processing pipeline was developed to extract the plot heights from the point clouds. The results showed that the errors for the the calculated plot heights are less than 34%. The results could be further improved by higher-accuracy GPS and a higher-resolution camera to increase the accuracy of the point cloud.

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