Weitao Sun

Dr. Weitao Sun


Research Focus & Metrics

Academic Career Length

8Years (2019-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

View All Publications
18 March 2019 in Electronics
Verified
Journal Article
Open access
PDF file
YXYifeng Xu
Yifeng Xu
HWHuigang Wang
Huigang Wang
XLXing Liu
Xing Liu
HHHenry Ren He
Henry Ren He
QGQingyue Gu
Qingyue Gu
WSWeitao Sun
Weitao Sun
Recent advances in deep learning have shown exciting promise in low-level artificial intelligence tasks such as image classification, speech recognition, object detection, and semantic segmentation, etc. Artificial intelligence has made an important contribution to autopilot, which is a complex high-level intelligence task. However, the real autopilot scene is quite complicated. The first accident of autopilot occurred in 2016. It resulted in a fatal crash where the white side of a vehicle appeared similar to a brightly lit sky. The root of the problem is that the autopilot vision system cannot identify the part of a vehicle when the part is similar to the background. A method called DIDA was first proposed based on the deep learning network to see the hidden part. DIDA cascades the following steps: object detection, scaling, image inpainting assuming a hidden part beside the car, object re-detection from inpainted image, zooming back to the original size, and setting an alarm region by comparing two detected regions. DIDA was tested in a similar scene and achieved exciting results. This method solves the aforementioned problem only by using optical signals. Additionally, the vehicle dataset captured in Xi’an, China can be used in subsequent research.

1 February 2019 in Journal of Visual Communication and Image Representation
Verified
Journal Article
Closed access
YXYifeng Xu
Yifeng Xu
HWHuigang Wang
Huigang Wang
XLXing Liu
Xing Liu
WSWeitao Sun
Weitao Sun

1 August 2020 in Complexity
Verified
Journal Article
Open access
PDF file
YXYifeng Xu
Yifeng Xu
HWHuigang Wang
Huigang Wang
GCGarth Douglas Cooper
Garth Douglas Cooper
SRShaowei Rong
Shaowei Rong
WSWeitao Sun
Weitao Sun
Underwater image processing is a difficult subtopic in the field of computer vision due to the complex underwater environment. Since the light is absorbed and scattered, underwater images have many distortions such as underexposure, blurriness, and color cast. The poor quality hinders subsequent processing such as image classification, object detection, or segmentation. In this paper, we propose a method to collect underwater image pairs by placing two tanks in front of the camera. Due to the high-quality training data, the proposed restoration algorithm based on deep learning achieves inspiring results for underwater images taken in a low-light environment. The proposed method solves two of the most challenging problems for underwater image: darkness and fuzziness. The experimental results show that the proposed method surpasses most other methods.

17 June 2020 in Electronics
Verified
Journal Article
Open access
PDF file
YXYifeng Xu
Yifeng Xu
HWHuigang Wang
Huigang Wang
GCGarth Douglas Cooper
Garth Douglas Cooper
SRShaowei Rong
Shaowei Rong
WSWeitao Sun
Weitao Sun
Recent advances in deep learning have shown exciting promise in various artificial intelligence vision tasks, such as image classification, image noise reduction, object detection, semantic segmentation, and more. The restoration of the image captured in an extremely dark environment is one of the subtasks in computer vision. Some of the latest progress in this field depends on sophisticated algorithms and massive image pairs taken in low-light and normal-light conditions. However, it is difficult to capture pictures of the same size and the same location under two different light level environments. We propose a method named NL2LL to collect the underexposure images and the corresponding normal exposure images by adjusting camera settings in the “normal” level of light during the daytime. The normal light of the daytime provides better conditions for taking high-quality image pairs quickly and accurately. Additionally, we describe the regularized denoising autoencoder is effective for restoring a low-light image. Due to high-quality training data, the proposed restoration algorithm achieves superior results for images taken in an extremely low-light environment (about 100× underexposure). Our algorithm surpasses most contrasted methods solely relying on a small amount of training data, 20 image pairs. The experiment also shows the model adapts to different brightness environments.