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Camera and laser rangefinder (LRF) are widely used in various mobilized systems, such as intelligent vehicle, autonomous robot, etc. And extrinsic calibration is essential and basically the first step to integrate image and 3D LIDAR data. This paper presents a flexible method for extrinsic calibration of a pin-hole camera and a 3D Laser Rangefinder (LRF). The method extends the chessboard pattern,...
To solve the problem that the Direct Linear Transformation (DLT) algorithm cannot be used in the background moving scene, a novel transforming method based on 2D DLT is proposed. The method transforms the feature points in different scenes to the same object space coordinate. Firstly the precision of 2D DLT algorithm has been verified in high-precision 3-D digital camera calibration field. Experiments...
Extraction of traffic parameters, such as queue length, stop delay and etc, of a road section between intersections is significant for traffic signal control. It is a challenge to get high precision parameters by video processing technologies during peak hours, for the serious vehicle queue. We propose a method of acquiring traffic parameters based on detecting traffic waves at intersections. We use...
In order to solve the problems with rescue target detection under complex sea environment, the research on object detection on the sea surface based on multi-spectral analysis and machine vision is presented in this paper. Firstly the difficulties and features of weak target detection and its complex sea background are discussed and the multi-spectral image acquisition and pre-processing method suitable...
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