<> "The repository administrator has not yet configured an RDF license."^^ . <> . . . "Learning to Count Leaves in Rosette Plants"^^ . "Counting the number of leaves in plants is important for plant phenotyping, since it can be used to assess plant growth stages. We propose a learning-based approach for counting leaves in rosette (model) plants. We relate image-based descriptors learned in an unsupervised fashion to leaf counts using a supervised regression model. To take advantage of the circular and coplanar arrangement of leaves and also to introduce scale and rotation invariance, we learn features in a log-polar representation. Image patches extracted in this log-polar domain are provided to K-means, which builds a codebook in a unsupervised manner. Feature codes are obtained by projecting patches on the codebook using the triangle encoding, introducing both sparsity and specifically designed representation. A global, per-plant image descriptor is obtained by pooling local features in specific regions of the image. Finally, we provide the global descriptors to a support vector regression framework to estimate the number of leaves in a plant. We evaluate our method on datasets of the \\textit{Leaf Counting Challenge} (LCC), containing images of Arabidopsis and tobacco plants. Experimental results show that on average we reduce absolute counting error by 40% w.r.t. the winner of the 2014 edition of the challenge -a counting via segmentation method. When compared to state-of-the-art density-based approaches to counting, on Arabidopsis image data ~75% less counting errors are observed. Our findings suggest that it is possible to treat leaf counting as a regression problem, requiring as input only the total leaf count per training image."^^ . "2016-09" . . . "BMVA Press"^^ . . . . . . . . . . . . . . "Mario Valerio"^^ . "Giuffrida"^^ . "Mario Valerio Giuffrida"^^ . . "Sotirios A."^^ . "Tsaftaris"^^ . "Sotirios A. Tsaftaris"^^ . . "Massimo"^^ . "Minervini"^^ . "Massimo Minervini"^^ . . . . "Proceedings of the Computer Vision Problems in Plant Phenotyping (CVPPP)"^^ . . . . . "Swansea, UK"^^ . . . . . . "Learning to Count Leaves in Rosette Plants (PDF)"^^ . . . . . . "paper001.pdf"^^ . . . "Learning to Count Leaves in Rosette Plants (Other)"^^ . . . . . . "lightbox.jpg"^^ . . . "Learning to Count Leaves in Rosette Plants (Other)"^^ . . . . . . "preview.jpg"^^ . . . "Learning to Count Leaves in Rosette Plants (Other)"^^ . . . . . . "medium.jpg"^^ . . . "Learning to Count Leaves in Rosette Plants (Other)"^^ . . . . . . "small.jpg"^^ . . "HTML Summary of #2744 \n\nLearning to Count Leaves in Rosette Plants\n\n" . "text/html" . . . "QA75 Electronic computers. Computer science"@en . .