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Alexander Freytag

4 accepted papers

2023

Decoupled Semantic Prototypes Enable Learning From Diverse Annotation Types for Semi-Weakly Segmentation in Expert-Driven Domains

CVPR 2023poster

A vast amount of images and pixel-wise annotations allowed our community to build scalable segmentation solutions for natural domains. However, the transfer to expert-driven domains like microscopy applications or medical healthcare remains difficult as domain experts are a critical factor due to th…

2022

Graph-Constrained Contrastive Regularization for Semi-Weakly Volumetric Segmentation

ECCV 2022poster

"Semantic volume segmentation suffers from the requirement of having voxel-wise annotated ground-truth data, which requires immense effort to obtain. In this work, we investigate how models can be trained from sparsely annotated volumes, i.e. volumes with only individual slices annotated. By formula…

2021

Every Annotation Counts: Multi-Label Deep Supervision for Medical Image Segmentation

CVPR 2021poster

Pixel-wise segmentation is one of the most data and annotation hungry tasks in our field. Providing representative and accurate annotations is often mission-critical especially for challenging medical applications. In this paper, we propose a semi-weakly supervised segmentation algorithm to overcome…

Cited by 99PDFcodeScholar
2015

Active Learning and Discovery of Object Categories in the Presence of Unnameable Instances

CVPR 2015poster

Current visual recognition algorithms are "hungry" for data but massive annotation is extremely costly. Therefore, active learning algorithms are required that reduce labeling efforts to a minimum by selecting examples that are most valuable for labeling. In active learning, all categories occurring…

Cited by 73SourcePDFScholar