We propose an approach for external calibration of a 3D laser scanner with an omnidirectional camera system. The utility of an accurate calibration is that it allows for precise co-registration between the camera imagery and the 3D point cloud. This association can be used to enhance various state of the art algorithms in computer vision and robotics. The extrinsic calibration technique used he...

The paper addresses the region search problem in three-dimensional (3D) space. The data used is a dynamically growing point cloud as it is typically gathered with a 3D-sensing device like a laser range-scanner. An encoding of space in combination with a new region search algorithm is introduced. The algorithm allows for fast access to spherical subsets of variable size. An octree based and a ba...

Most laser scanners in engineering are extended versions of tactile measuring machines. These high precision devices are typically very expensive and hardware modifications are not possible without impairing the precision of the device. For these reasons we built our own laser-scanner system. It is based on a multi-camera reconstruction system developed for fast 3D face reconstructions. Based o...

This paper describes a navigation method based on road detection using both a laser scanner and a vision sensor. The method is to classify the surface in front of the robot into traversable segments (road) and obstacles using the laser scanner, this classifies the area just in front of the robot (2.5m). The front looking camera is used to classify the road from this distance and forward, taking...

Three-dimensional digital acquisition techniques can be useful in archaeology because they make a further technological contribution to the visualization of finds and structures. The possibility integrating three-dimensional models from different systems (laser scanner, UAV, reflex Georadar) is even more exciting. One peculiarities these integration promoting dissemination knowledge through vir...

Introduction The use of the total station in crime and collision scenes date back to the early 1990s where it was first claimed to be used in collision scene documentation [1]. The range and speed of the total station at the time allowed for greater accuracy, speed, and range when compared to traditional hand measurements using tape measures and plumb bobs. Similarly, one of the first reported ...

In this study, we present an analysis of the causes a landslide along railway track in Polish Lowlands. The damaged and caused significant material losses. Digital models terrain surface before after were elaborated. Remote sensing using LIDAR aerial technique terrestrial laser scanner was performed to determine morphology. Soil mass behaviour analysed by 3D numerical simulation. A model create...

The present study considers the damage mechanisms and rainfall infiltration process responsible for landslide phenomena which originate from accumulation slopes. Accordingly, a physical test model is developed different slopes conditions. Moreover, three-dimensional laser scanner camera are used to monitor slope erosion dynamic evolution. Using this approach, time variation curves of volumetric...

This dissertation explores the use of an Airborne Laser Scanner (ALS) for various types of aircraft Terrain-Referenced Navigation (TRN) techniques. Using the methods explored, an ALS-based TERRain Aided Inertial Navigator (TERRAIN) was developed, flight tested, and shown capable of providing meter-level positioning accuracy in real-time. The ALS-based TRN techniques discussed are constrained to...