Scale adaptive image cropping for UAV object detection

UM > Faculty of Science and Technology > DEPARTMENT OF COMPUTER AND INFORMATION SCIENCE

Status	已發表Published
	Scale adaptive image cropping for UAV object detection
	Zhou, J. K.; Vong, C. M.; Liu, Q.; Wang, Z. Y.
	2019-11-01
Source Publication	Neurocomputing (SCI-E)
ISSN	0925-2312
Pages	305-313
Abstract	Although deep learning methods have made significant breakthroughs in generic object detection, their performance on aerial images is not satisfactory. Unlike generic images, aerial images have smaller object relative scales (ORS), more low-resolution objects, and serious object scale diversity. Most researches focus on modifying network structures to address these challenges, while few studies pay attention to data enhancement which can be used in combination with model modification to further improve detection accuracy. In this work, a novel data enhancement method called scale adaptive image cropping (SAIC) is proposed to address these three challenges. Specifically, SAIC consists three steps: ORS estimation in which a specific neural network is designed to estimate ORS levels of images; image resizing in which a GAN-based super-resolution method is adopted to up-sample images with the smallest ORS level, easing low-resolution object detection; image cropping in which three cropping strategies are proposed to crop resized images, adjusting ORS. Extensive experiments are conducted to demonstrate the effectiveness of our method. SAIC improves the accuracy of feature pyramid network (FPN) by 9.65% (or relatively 37.06%). Without any major modification, FPN trained with SAIC won the 3rd rank on 2018 VisDrone challenge detection task.
Keyword	Data enhancement UAV aerial imagery Object detection Deep neural network
Language	英語English
The Source to Article	PB_Publication
PUB ID	47298
Document Type	Journal article
Collection	DEPARTMENT OF COMPUTER AND INFORMATION SCIENCE
Corresponding Author	Liu, Q.
Recommended Citation GB/T 7714	Zhou, J. K.,Vong, C. M.,Liu, Q.,et al. Scale adaptive image cropping for UAV object detection[J]. Neurocomputing (SCI-E), 2019, 305-313.
APA	Zhou, J. K.., Vong, C. M.., Liu, Q.., & Wang, Z. Y. (2019). Scale adaptive image cropping for UAV object detection. Neurocomputing (SCI-E), 305-313.
MLA	Zhou, J. K.,et al."Scale adaptive image cropping for UAV object detection".Neurocomputing (SCI-E) (2019):305-313.

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