Improved partial differential equation-based method to remove noise in image enhancement

Removing noise effectively without destroying important fine structure is a challenging problem in image processing. Among many techniques, diffusion method is shown to be attractive due to its rigorous mathematical background and efficiency. In this paper we propose a well-balanced diffusion method by redefining the diffusion and regularization...

Off-board Visual Odometry and Control of an Ultralight Quadrotor MAV

In this paper, we propose an approach to autonomously control a quadrotor micro aerial vehicle (MAV). With take-off weight of 50 g and 8-min flight endurance, the MAV platform codenamed ‘KayLion’ developed by the National University of Singapore (NUS) is able to perform autonomous flight with pre-planned path tracking. The vision-based...

Volumetric three-component velocimetry measurements of turbulent flow under breaking waves

The instantaneous turbulent velocity fields under plunging regular waves were measured in a wave flume using the volumetric three-component velocimetry (V3V) technique. The measurement volume was approximately 140 mm long, 140 mm wide, and 85 mm high extending from the bottom of a plane slope to the wave trough level. The aerated water was...