Active Learning Inspired ControlNet Guidance for Augmenting Semantic Segmentation Datasets
- URL: http://arxiv.org/abs/2503.09221v1
- Date: Wed, 12 Mar 2025 10:09:27 GMT
- Title: Active Learning Inspired ControlNet Guidance for Augmenting Semantic Segmentation Datasets
- Authors: Hannah Kniesel, Pedro Hermosilla, Timo Ropinski,
- Abstract summary: ControlNet enables precise alignment between ground truth segmentation masks and the generated image content.<n>We propose the first approach to integrate active learning-based selection metrics into the backward diffusion process.<n>We show that segmentation models trained with guided synthetic data outperform those trained on non-guided synthetic data.
- Score: 15.786823017952122
- License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
- Abstract: Recent advances in conditional image generation from diffusion models have shown great potential in achieving impressive image quality while preserving the constraints introduced by the user. In particular, ControlNet enables precise alignment between ground truth segmentation masks and the generated image content, allowing the enhancement of training datasets in segmentation tasks. This raises a key question: Can ControlNet additionally be guided to generate the most informative synthetic samples for a specific task? Inspired by active learning, where the most informative real-world samples are selected based on sample difficulty or model uncertainty, we propose the first approach to integrate active learning-based selection metrics into the backward diffusion process for sample generation. Specifically, we explore uncertainty, query by committee, and expected model change, which are commonly used in active learning, and demonstrate their application for guiding the sample generation process through gradient approximation. Our method is training-free, modifying only the backward diffusion process, allowing it to be used on any pretrained ControlNet. Using this process, we show that segmentation models trained with guided synthetic data outperform those trained on non-guided synthetic data. Our work underscores the need for advanced control mechanisms for diffusion-based models, which are not only aligned with image content but additionally downstream task performance, highlighting the true potential of synthetic data generation.
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