Tech Tuesday - Applications of lasers in historical preservation

Applications of lasers in historical preservation

Capturing our legacy and artifacts within its existing state is vital for preservation and also to gain comprehensive knowledge. The use of 3D scanners allows current state data to be captured promptly including images with no disruption and getting in touch with the artifacts. Analysis and visualization is performed easily inn a virtual environment created. Laser scanning are essential for pre-existing historical preservation. Modeling construction from point clouds grants avenues for surveying virtual interactivity especially in inaccessible environment. The use of laser scanners together with digital documentation techniques and also traditional method it provides a useful way of documenting spatial characteristics of the sites. Through this spatial information provided the archaeologist, conservators and site managers are able monitor sites and perform any renovation work which ensures physical integrity.

3D terrestrial scanners are becoming a common technique which is accepted because of it’s entirety, accuracy and fastness specifications. It is able to document historical tribute façade information in a 3D environment, owing to its capability of providing users with superior spatial data for constructions in difficult 3D scenes within a short time. The colored point cloud information/data obtained from the 3D scanner is used to offer a realistic notion of a monument for users to navigate the view point around it and viewing it from all angles. This technique provides high efficiency in data collection which is useful in unreachable places. Digital photogrammetry and scanning using lasers are the two main techniques used in acquiring data for digital heritage models. Digital photogrammetry method for capturing objects is already established. Combination of digital photogrammetry and laser scanning produces a better 3D model. FARO photon scanners captures up to a 976,000 points/second that is 153metres. These systems are based on phase shift measurement principle and provide large field of view of about 360⁰ for horizontal direction and 320⁰ for vertical direction.

Data obtained are made accessible to a wider audience. This data facilitates educational purpose and also opening up these sites for the general public to take electronic tour via virtual tourism. Lasers are also used in historical space preservation. A laser in preservation of cultural heritage offers a systematic outline of the fundamental and applications of laser scanning techniques in artwork preservation and also archaeological science.

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