Segment for Restoration, Restore for Segmentation
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Most state-of-the-art semantic segmentation or scene parsing approaches only achieve high accuracy rates in optimal weather conditions. The performance decrease enormously if images with unknown disturbances occur, which is less discussed but appears more in real applications. Most existing research works cast the handling of the challenging adverse conditions as a post-processing step of signal restoration or enhancement after sensing, then feed the restored images for visual understanding. However, the performance will largely depend on the quality of restoration or enhancement. Whether restoration-based approaches would actually boost the semantic segmentation performance remains questionable. In this paper, we propose a novel framework to tackle semantic segmentation and image restoration under adverse environmental conditions, named SR-Restore. The proposed approach contains two components: Semantically-Guided Adaptation, which exploits and leverages semantic information from degraded images then help to refine the segmentation; and Exemplar-Guided Synthesis, which synthesizes restored or enhanced images from semantic label maps given specific degraded exemplars. SR-Restore exploits the possibility of building connections of low-level image processing and high level computer vision tasks, achieving image restoration via segmentation refinement. Extensive experiments on several datasets demonstrate that our approach can not only improve the accuracy of high-level vision tasks with image adaption, but also boosts the perceptual quality and structural similarity of degraded images with image semantic guidance.
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