Riegl USA has introduced a high resolution digital camera solution applied to 3D scan data for true photogrammetric registration of 6 megapixel photo information with 3D point cloud data.

The integrated Riegl digital camera seamlessly meshes high resolution photo pixel information with scan data coordinate information gathered at one or more scanner positions. Users of this new technology benefit from increased job site target identification and accurate photo quality imagery.

For example, in almost all scanning projects, data acquisition is based on taking scans from different scan locations to obtain a complete data set of the object's surface without "data gaps." The Riegl digital camera option takes photogrammetric information at each scanning position and transforms pixel (camera) coordinates into beam (scanner) coordinates. While in the field, the scanner operator can merge scan data from various scanning positions, registering the scans in a project coordinate system to verify key data is captured before leaving the job site.

The Riegl digital camera option can be mounted on any Riegl 3D Scanner and is quickly calibrated using Riegl's 3D RiSCAN PRO software. The software is the companion package to Riegl 3D Scanners and allows the operator to perform a number of tasks including scanner configuration, data acquisition, visualization, manipulation and archiving. The intuitive software is project-oriented, meaning a single project is stored in a single directory structure containing scan data, registration information, descriptors and photogrammetric information.

The Riegl digital camera option can use two types of photo images to fully document a scanning project. The first are images taken when the camera is mounted and calibrated on the scanner. As soon as scan position data is registered in the scan project coordinate system, the digital camera photos are fully meshed with the scan data.

A second set of images can be taken with the camera not mounted on the scanner and can be used to fully document a job site or where use of the digital camera can not be mounted. These images are then transferred or meshed to the scan data coordinate system by manually identifying tie points in the image and corresponding 3D data from the scan data. Tie points are most often retro-reflective targets clearly shown in scan data and which can also be accurately measured with total stations.

Source: Riegl USA, Feb. 9, 2004

Links