Assessment of Mixed Sward Using Context Sensitive Convolutional Neural Networks

Christopher J. Bateman, Jaco Fourie, Jeffrey Hsiao, Kenji Irie, Angus Heslop, Anthony Hilditch, Michael Hagedorn, Bruce Jessep, Steve Gebbie, Kioumars Ghamkhar
2020 Frontiers in Plant Science  
Breeding higher yielding forage species is limited by current manual harvesting and visual scoring techniques used for measuring or estimation of biomass. Automation and remote sensing for high throughput phenotyping has been used in recent years as a viable solution to this bottleneck. Here, we focus on using RGB imaging and deep learning for white clover (Trifolium repens L.) and perennial ryegrass (Lolium perenne L.) yield estimation in a mixed sward. We present a new convolutional neural
more » ... work (CNN) architecture designed for semantic segmentation of dense pasture and canopies with high occlusion to which we have named the local context network (LC-Net). On our testing data set we obtain a mean accuracy of 95.4% and a mean intersection over union of 81.3%, outperforming other methods we have found in the literature for segmenting clover from ryegrass. Comparing the clover/vegetation fraction for visual coverage and harvested dry-matter however showed little improvement from the segmentation accuracy gains. Further gains in biomass estimation accuracy may be achievable through combining RGB with complimentary information such as volumetric data from other sensors, which will form the basis of our future work.
doi:10.3389/fpls.2020.00159 pmid:32174941 pmcid:PMC7056886 fatcat:od2ae44fkfdcjkn3j76dgctemu