introduction: three-dimensional (3d) scanners are widely used in medicine. one of the applications of 3d scanners is the acquisition of anthropometric dimensions for ergonomics and the creation of an anthropometry data bank. the aim of this study was to evaluate the precision and accuracy of a modified 3d scanner fabricated in this study. methods: in this work, a 3d scan of the human body was o...

Autonomous robotic systems need an equipment like a human eye for their movement. In this study a 3D laser scanner has been designed and implemented for those autonomous robotic systems. In general 3D laser scanners are using 2 dimension laser range finders that are moving on one-axis (1D) to generate the model. In this study, the model has been obtained by a one-dimensional laser range finder ...

A terrestrial laser scanner was used to measure the three-dimensional structure of forest stands in the Swiss National Park, eastern Switzerland. Spatially coincident hemispherical photographs were taken at each sampling point and the position of each point was determined using differential GPS. A scanner model was derived in order to determine the expected number of laser shots in all directio...

Knee joint is the most important joint in the human body. 3D CAD modelling is the most important part for analysis Reverse engineering is one of the process by which 3D CAD model can be easily generated. Different techniques available for generating CAD models. The paper describes the methodology applied in the development of an anatomically detailed three-dimensional knee model from 3D laser s...

This paper presents a new object recognition technique using multimodal information by a laser scanner. A ToF laser scanner captures a three dimensional (3D) shape of a target object precisely by measuring the round-trip time of a laser pulse. In addition, a laser scanner also collects the strength of the reflected laser (reflectivity) as side-product of range measurement. Focusing on the fact ...

there exist a number of factors that affect the quality laser scanner. in other words, the accuracy of a terrestrial scanner is limited extensively by systematic errors and thus must be calibrated. indeed, calibration is a prerequisite for obtaining 3d precise and reliable data from point clouds. until now, several models have been proposed to improve the accuracy of laser scanner data, most of...

Laser range scanners are a popular method for acquiring three-dimensional geometry due to their accuracy and robustness. Maximizing scanner accuracy while minimizing engineering costs is a key challenge to future scanner designs. Engineering costs arise from both expensive components and difficult calibration

This chapter introduces laser scanning to students and researchers who are interested in using this three-dimensional (3D) acquisition method for biological research. Laser scanning is yet another tool for transforming biological structures into 3D models that contain useful geometric and topological information. Current laser scanning technology makes it relatively straightforward to acquire 3...