This work introduces a transformation-based learner model for classification forests. The weak learner at each split node plays a crucial role in a classification tree. We propose to optimize the splitting objective by learning a linear transformation on subspaces using nuclear norm as the optimization criteria. The learned linear transformation restores a low-rank structure for data from the same class, and, at the same time, maximizes the separation between different classes, thereby improving the performance of the split function. Theoretical and experimental results support the proposed framework.
Adaptive Feature Selection Guided Deep Forest for COVID-19 Classification with Chest CT
Nanjing University of Aeronautics and Astronautics(南京航空航天大学);The Third Hospital of Jilin University(吉林大学第三医院);Ruijin Hospital, Shanghai Jiao Tong University School of Medicine(上海交通大学医学院附属瑞金医院);Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology(华中科技大学同济医学院附属同济医院);Shanghai Public Health Clinical Center, Fudan University(复旦大学附属上海市公共卫生临床中心);Shanghai United Imaging Intelligence Co., Ltd.(上海联影智能科技有限公司);Qianjiang Central Hospital, Jishou University School of Medicine(吉首大学医学院附属黔江中心医院)
胸部计算机断层扫描(CT)成为辅助诊断新型冠状病毒病(COVID-19)的有效工具。由于COVID-19在全球范围内爆发,使用基于CT图像的COVID-19分类的计算机辅助诊断技术可以在很大程度上减轻临床医生的负担。在本文中,我们提出了一种自适应特征选择引导的深度森林(AFS-DF)的COVID-19分类的胸部CT图像的基础上。具体来说,我们首先从CT图像中提取特定位置的特征。然后,为了用相对小规模的数据捕获这些特征的高级表示,我们利用深森林模型来学习特征的高级表示。此外,我们提出了一种基于训练的深度森林模型的特征选择方法,以减少特征的冗余,其中特征选择可以自适应地与COVID-19分类模型相结合。我们在COVID-19数据集上评估了我们提出的AFS-DF,其中包括1495名COVID-19患者和1027名社区获得性肺炎(CAP)患者。该方法的准确性(ACC)、灵敏度(SEN)、特异性(SPE)和AUC分别为91.79%、93.05%、89.95%和96.35%。在COVID-19数据集上的实验结果表明,与4种广泛使用的机器学习方法相比,所提出的AFS-DF在COVID-19 vs. CAP分类中具有更好的性能。
A Novel Approach for Optimum-Path Forest Classification Using Fuzzy Logic
University of Fortaleza(福塔莱萨大学);Pontifical Catholic University of Rio de Janeiro(里约热内卢天主教大学);São Paulo State University(圣保罗州立大学);Nantong University(南通大学)
Multimodal classification of forest biodiversity potential from 2D orthophotos and 3D airborne laser scanning point clouds
Perception Laboratory, Aalborg University, Denmark;Pioneer Centre for Artificial Intelligence, Denmark;Department of Computer Science, Copenhagen University, Denmark;Institute for Visual \& Analytic Computing, Rostock University, Germany;University of Barcelona;Computer Vision Center, Spain
SilvaScenes: Tree Detection and Species Classification from Under-Canopy Images in Natural Forests
Northern Robotics Laboratory, Université Laval(北方机器人实验室,拉瓦尔大学);Département des sciences du bois et de la forêt, Université Laval(林业与木材科学系,拉瓦尔大学);Institut des Sciences de la Forêt tempérée, Université du Québec en Outaouais(温带森林科学研究所,魁北克outsouais大学)
Mapping and Classification of Trees Outside Forests using Deep Learning
Osnabrück University, Joint Lab Artificial Intelligence and Data Science(奥恩布里克大学人工智能与数据科学联合实验室);Osnabrück University, Institute for Computer Science, Remote Sensing Osnabrück(奥恩布里克大学计算机科学研究所,奥恩布里克远程 sensing 研究所);Leibniz Institute for Agricultural Engineering and Bioeconomy(莱比锡农业工程与生物经济研究所);Osnabrück University, Institute of Cognitive Science, Artificial Intelligence(奥恩布里克大学认知科学研究所,人工智能)
Label-Efficient 3D Forest Mapping: Self-Supervised and Transfer Learning for Instance Segmentation, Semantic Segmentation, and Species Classification
Helmholtz-Zentrum Dresden-Rossendorf (HZDR), Helmholtz Institute Freiberg for Resource Technology (HIF)(德累斯顿-罗斯托克亥姆霍兹中心(HZDR)、弗里贝格资源技术亥姆霍兹研究所(HIF));Remote Sensing and Geoinformatics, Freie Universität Berlin(柏林自由大学遥感与地理信息学系);Institute of Geomatics, BOKU University(博科尼大学测绘学院);Faculty of Electrical and Computer Engineering, University of Iceland(爱沙尼亚大学电气与计算机工程学院)
Long-Tailed Classification Based on Coarse-Grained Leading Forest and Multi-Center Loss
State Key Laboratory of Public Big Data, Guizhou University(贵州大学公共大数据国家重点实验室);College of Computer and Information Science, Southwest University(西南大学计算机与信息科学学院);Chongqing Key Laboratory of Computational Intelligence, Chongqing University of Posts and Telecommunications(重庆邮电大学重庆市计算智能重点实验室)