Image Augmentation Techniques for Road Sign Detection in Automotive Vision System

2019 ◽  
pp. 229-242
Author(s):  
Paulina Bugiel ◽  
Jacek Izydorczyk ◽  
Tomasz Sułkowski
Keyword(s):  
Vision System ◽  
Road Sign ◽  
Sign Detection ◽  
Augmentation Techniques

scholarly journals Deep Neural Networks for Road Sign Detection and Embedded Modeling Using Oblique Aerial Images

2021 ◽  
Vol 13 (5) ◽  
pp. 879
Author(s):  
Zhu Mao ◽  
Fan Zhang ◽  
Xianfeng Huang ◽  
Xiangyang Jia ◽  
Yiping Gong ◽  
...  
Keyword(s):  
Neural Networks ◽  
Smart Cities ◽  
Geometric Constraints ◽  
Small Object ◽  
The Road ◽  
Road Signs ◽  
Road Sign ◽  
Synthesis Strategy ◽  
Urban Models ◽  
Sign Detection

Oblique photogrammetry-based three-dimensional (3D) urban models are widely used for smart cities. In 3D urban models, road signs are small but provide valuable information for navigation. However, due to the problems of sliced shape features, blurred texture and high incline angles, road signs cannot be fully reconstructed in oblique photogrammetry, even with state-of-the-art algorithms. The poor reconstruction of road signs commonly leads to less informative guidance and unsatisfactory visual appearance. In this paper, we present a pipeline for embedding road sign models based on deep convolutional neural networks (CNNs). First, we present an end-to-end balanced-learning framework for small object detection that takes advantage of the region-based CNN and a data synthesis strategy. Second, under the geometric constraints placed by the bounding boxes, we use the scale-invariant feature transform (SIFT) to extract the corresponding points on the road signs. Third, we obtain the coarse location of a single road sign by triangulating the corresponding points and refine the location via outlier removal. Least-squares fitting is then applied to the refined point cloud to fit a plane for orientation prediction. Finally, we replace the road signs with computer-aided design models in the 3D urban scene with the predicted location and orientation. The experimental results show that the proposed method achieves a high mAP in road sign detection and produces visually plausible embedded results, which demonstrates its effectiveness for road sign modeling in oblique photogrammetry-based 3D scene reconstruction.

Robust Drive Controlling System Based on Road Sign Detection for Low-Resolution Images

2021 ◽  
Author(s):  
Murali Keshav ◽  
Amartya Anshuman ◽  
Shashank Gupta ◽  
Shivanshu Mahim ◽  
Parakram Singh ◽  
...  
Keyword(s):  
Low Resolution ◽  
Road Sign ◽  
Controlling System ◽  
Sign Detection ◽  
Low Resolution Images

Road-Sign Detection and Recognition Based on Support Vector Machines

2007 ◽  
Vol 8 (2) ◽  
pp. 264-278 ◽  
Author(s):  
Saturnino Maldonado-Bascon ◽  
Sergio Lafuente-Arroyo ◽  
Pedro Gil-Jimenez ◽  
Hilario Gomez-Moreno ◽  
Francisco Lopez-Ferreras
Keyword(s):  
Support Vector Machines ◽  
Support Vector ◽  
Road Sign ◽  
Vector Machines ◽  
Sign Detection ◽  
Detection And Recognition

scholarly journals Multimodal Cue Combinations: A Possible Approach to Designing In-Vehicle Takeover Requests for Semi-autonomous Driving

2019 ◽  
Vol 63 (1) ◽  
pp. 1739-1743
Author(s):  
Gaojian Huang ◽  
Clayton Steele ◽  
Xinrui Zhang ◽  
Brandon J. Pitts
Keyword(s):  
Autonomous Vehicles ◽  
Response Times ◽  
Autonomous Driving ◽  
Multimodal Signals ◽  
Road Sign ◽  
Sign Detection ◽  
Level 3 ◽  
Perceived Workload ◽  
Tactile Cues ◽  
Vehicle Automation

The rapid growth of autonomous vehicles is expected to improve roadway safety. However, certain levels of vehicle automation will still require drivers to ‘takeover’ during abnormal situations, which may lead to breakdowns in driver-vehicle interactions. To date, there is no agreement on how to best support drivers in accomplishing a takeover task. Therefore, the goal of this study was to investigate the effectiveness of multimodal alerts as a feasible approach. In particular, we examined the effects of uni-, bi-, and trimodal combinations of visual, auditory, and tactile cues on response times to takeover alerts. Sixteen participants were asked to detect 7 multimodal signals (i.e., visual, auditory, tactile, visual-auditory, visual-tactile, auditory-tactile, and visual-auditory-tactile) while driving under two conditions: with SAE Level 3 automation only or with SAE Level 3 automation in addition to performing a road sign detection task. Performance on the signal and road sign detection tasks, pupil size, and perceived workload were measured. Findings indicate that trimodal combinations result in the shortest response time. Also, response times were longer and perceived workload was higher when participants were engaged in a secondary task. Findings may contribute to the development of theory regarding the design of takeover request alert systems within (semi) autonomous vehicles.

Vision-Based Road Sign Detection

2015 ◽  
Author(s):  
Manuel Kehl ◽  
Markus Enzweiler ◽  
Bjoern Froehlich ◽  
Uwe Franke ◽  
Wolfgang Heiden
Keyword(s):  
Road Sign ◽  
Sign Detection

Sign Detection Vision Based Mobile Robot Platform

2017 ◽  
Vol 7 (2) ◽  
pp. 524
Author(s):  
Hairol Nizam Mohd Shah ◽  
Mohd Zamzuri Ab Rashid ◽  
Zalina Kamis ◽  
Mohd Shahrieel Mohd Aras ◽  
Nursabillilah Mohd Ali ◽  
...  
Keyword(s):  
Mobile Robot ◽  
Graphical User Interface ◽  
Vision System ◽  
Electrical Power ◽  
Harris Corner ◽  
Sign Detection ◽  
Result Show ◽  
Point Detection ◽  
Comfortable Ride ◽  
Robot Platform

<p>Vision system applied in electrical power generated mobile robot to provide a comfortable ride while providing comfort to tourist to interact with visitors. The camera is placed in front of the mobile robot to snap the images along in pathways. The system can recognized the sign which are right, left and up by using Harris corner algorithms and will be display in Graphical User Interface (GUI). A sign can be determined from the vertex coordinates according to the degree to distinguish the direction of the sign. The system will be tested in term of percentage of success in Harris point detection and availability to detect sign with different range. The result show the even though not all Harris point in an image can be detected but most of the images possible to recognise it sign direction.</p>

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