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	Author	Chris Bahnsen; David Vazquez; Antonio Lopez; Thomas B. Moeslund
	Title	Learning to Remove Rain in Traffic Surveillance by Using Synthetic Data			Type	Conference Article
	Year	2019	Publication	14th International Conference on Computer Vision Theory and Applications	Abbreviated Journal
	Volume		Issue		Pages	123-130
	Keywords	Rain Removal; Traffic Surveillance; Image Denoising
	Abstract	Rainfall is a problem in automated traffic surveillance. Rain streaks occlude the road users and degrade the overall visibility which in turn decrease object detection performance. One way of alleviating this is by artificially removing the rain from the images. This requires knowledge of corresponding rainy and rain-free images. Such images are often produced by overlaying synthetic rain on top of rain-free images. However, this method fails to incorporate the fact that rain fall in the entire three-dimensional volume of the scene. To overcome this, we introduce training data from the SYNTHIA virtual world that models rain streaks in the entirety of a scene. We train a conditional Generative Adversarial Network for rain removal and apply it on traffic surveillance images from SYNTHIA and the AAU RainSnow datasets. To measure the applicability of the rain-removed images in a traffic surveillance context, we run the YOLOv2 object detection algorithm on the original and rain-removed frames. The results on SYNTHIA show an 8% increase in detection accuracy compared to the original rain image. Interestingly, we find that high PSNR or SSIM scores do not imply good object detection performance.
	Address	Praga; Czech Republic; February 2019
	Corporate Author				Thesis
	Publisher		Place of Publication		Editor
	Language		Summary Language		Original Title
	Series Editor		Series Title		Abbreviated Series Title
	Series Volume		Series Issue		Edition
	ISSN		ISBN		Medium
	Area		Expedition		Conference	VISIGRAPP
	Notes	ADAS; 600.118			Approved	no
	Call Number	Admin @ si @ BVL2019			Serial	3256
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