Abstract
Accurate yield estimates are of great value to vineyard growers to make informed management decisions such as crop thinning, shoot thinning, irrigation and nutrient delivery, preparing for harvest and planning for market. Current methods are labor intensive because they involve destructive hand sampling and are practically too sparse to capture spatial variability in large vineyard blocks. Here we report on an approach to predict vineyard yield automatically and non-destructively using images collected from vehicles driving along vineyard rows. Computer vision algorithms are applied to detect grape berries in images that have been registered together to generate high-resolution estimates. We propose an underlying model relating image measurements to harvest yield and study practical approaches to calibrate the two. We report on results on datasets of several hundred vines collected both early and in the middle of the growing season. We find that it is possible to estimate yield to within 4 % using calibration data from prior harvest data and 3 % using calibration data from destructive hand samples at the time of imaging.
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Acknowledgments
Work funded by the National Grape and Wine Initiative, (info@NGWI.org). Narasimhan was supported partially by NSF awards IIS-0964562 and CAREER IIS-0643628 and an ONR grant N00014-11-1-0295.
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Nuske, S., Gupta, K., Narasimhan, S., Singh, S. (2014). Modeling and Calibrating Visual Yield Estimates in Vineyards. In: Yoshida, K., Tadokoro, S. (eds) Field and Service Robotics. Springer Tracts in Advanced Robotics, vol 92. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-40686-7_23
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DOI: https://doi.org/10.1007/978-3-642-40686-7_23
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