PURPOSE Acquisition of laser range scans of an organ surface has the potential to efficiently provide measurements of geometric changes to soft tissue during a surgical procedure. A laser range scanner design is reported here which has been developed to drive intraoperative updates to conventional image-guided neurosurgery systems. METHODS The scanner is optically-tracked in the operating roo...

Extracting forest variables from airborne laser scanner has less than 10 years of history. During that time, however, a new area in the field of forest studies has emerged. This paper describes existing algorithms and methods of airborne laser scanning that are used for forest measurements. The methods are divided into the following categories: 1) extraction of DTM (digital terrain model), 2) e...

In this paper, a new algorithm to improve the accuracy of estimating diameter at breast height (DBH) for tree trunks in forest areas is proposed. First, the information is collected by a two-dimensional terrestrial laser scanner (2DTLS), which emits laser pulses to generate a point cloud. After extraction and filtration, the laser point clusters of the trunks are obtained, which are optimized b...

Terrestrial laser scanners and digital cameras can be considered largely complementary in their properties. Several instruments combine a laser scanner and a camera, with the laserscanner providing geometry information and the camera supplying point of surface colour. These approaches of data fusion make sub-optimal use of the complementary properties of the two devices, as they assign a master...

Obtaining three-dimensional models of urban scenes from sensor data is a challenging topic. The construction of 3D city models requires fusion of data coming from different sensors, such as laser scanners and cameras. At a first phase, we will process building facades, which will be considered as textured 3D planes. The acquisition system is equipped with two laser scanners and many (twelve) ca...

3D laser scanning technology has become an exciting and beneficial alternative in the collection of as-built data for plant and facilities applications, where accurate three-dimensional detail of complex facilities is critical for efficient design and construction projects. This paper introduces terrestrial 3D laser scanner as an instrument for two experiments which may be applicable to the fie...

OBJECTIVE The aim of this study was to compare the accuracy of Bolton analysis obtained from digital models scanned with the Ortho Insight three-dimensional (3D) laser scanner system to those obtained from cone-beam computed tomography (CBCT) images and traditional plaster models. METHODS CBCT scans and plaster models were obtained from 50 patients. Plaster models were scanned using the Ortho...

Three-dimensional laser scanning technology primarily relies on dense points to collect vectorized information of the target object and perform point cloud data processing without physical contact. There are numerous case studies in various fields regarding use three-dimensional for acquisition different objects. By utilizing a scanner, precise object's surface can be obtained, effectively meet...

Constructing highly detailed three-dimensional (3-D) models of large complex sites using range scanners can be a time-consuming manual process. One of the main drawbacks is determining where to place the scanner to obtain complete coverage of a site. We have developed a system for automatic view planning called VuePlan. When combined with our mobile robot, AVENUE, we have a system that is capab...