Abstract
Digital archiving of three-dimensional cultural heritage assets has increased the demand for visualization of large-scale point clouds of cultural heritage assets acquired by laser scanning. We proposed a fused transparent visualization method that visualizes a point cloud of a cultural heritage asset in an environment using a photographic image as the background. We also proposed lightness adjustment and color enhancement methods to deal with the reduced visibility caused by the fused visualization. We applied the proposed method to a laser-scanned point cloud of a high-valued cultural festival float with complex inner and outer structures. Experimental results demonstrate that the proposed method enables high-quality transparent visualization of the cultural asset in its surrounding environment.
Highlights
Digital archiving, which involves measuring, recording, and preserving tangible and intangible cultural assets, utilizing digital information technology, has attracted increasing attention worldwide [1,2,3]
We proposed lightness adjustment and color enhancement methods to improve the visibility of the cultural heritage asset visualized by the proposed fused transparent visualization method
We have proposed a fused transparent visualization method to visualize laser-scanned point cloud data of cultural heritage assets with their surrounding environments
Summary
Digital archiving, which involves measuring, recording, and preserving tangible and intangible cultural assets, utilizing digital information technology, has attracted increasing attention worldwide [1,2,3]. Laser-scanned point clouds of large-scale cultural heritage assets often contain complex structures and a large number of points. We proposed a stochastic algorithm, i.e., Stochastic Point-Based Rendering (SPBR), for precise transparent visualization of large-scale complex point clouds [21]. To the authors’ knowledge, no previous study has reported fused transparent visualization of a large-scale laser-scanned point cloud at interactive speed. We proposed a fused visualization method that transparently visualizes a point cloud of a cultural heritage asset in an environment using a photographic image as the background. We describe the proposed method for precise fused transparent visualization of large-scale complex point clouds acquired by laser scanning of cultural heritage objects. The proposed method is an extension of SPBR, which was developed in our previous research
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