Table of Contents Research Papers A Concept for Automated Polarized Web Content Annotation based on Multimodal Active Learning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Marek Herde, Denis Huseljic, Jelena Mitrović, Michael Granitzer and Bernhard Sick BioSegment: Active Learning segmentation for 3D electron microscopy imaging . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Benjamin Rombaut, Joris Roels and Yvan Saeys Enhancing Active Learning with Weak Supervision and Transfer Learning by Leveraging Information and Knowledge Sources . . . . . . . . . . . . 27 Lukas Rauch, Denis Huseljic and Bernhard Sick Accelerating Diversity Sampling for Deep Active Learning By Low-Dimensional Representations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43 Sandra Gilhuber, Max Berrendorf, Yunpu Ma and Thomas Seidl A Practical Evaluation of Active Learning Approaches for Object Detection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49 Jan Schneegans, Maarten Bieshaar and Bernhard Sick Certifiable Active Class Selection in Multi-Class Classification . . . . . . . . . . 68 Martin Senz, Mirko Bunse and Katharina Morik