Abstract
Abstract. A workflow for editing and rendering 360° images (also called spherical or equirectangular images) is illustrated and discussed. The aim was to develop a novel procedure able to overcome limitations induced by deformations in images acquired with low-cost 360° cameras. Editing and rendering are carried on equirectangular projections using a dynamic procedure that turns images into traditional central perspectives, enabling the user to change viewing directions, modify digital content, and store the changes in the original files. Integration of the rendered projections with traditional outputs of digital recording operations as well as other deliverables of the architectural restoration project is also discussed. Finally, the development of a web-GIS application that stores and shares multiple deliverables (including the newly proposed renders) is presented.
Highlights
Nowadays, the acquisition of 360° images and videos is a relatively simple and rapid task that can be carried out with various low-cost digital cameras, which capture the entire scene around the photographer
The aim is to develop a novel digital twin of a site using a combination of cartographic data, digital data acquired on site with digital recording tools, as
The implemented workflow is based on equirectangular projection because they can provide immersive visualizations showing both the actual condition of a site and the planned interventions exploiting the rendering procedure proposed in this paper
Summary
The acquisition of 360° images and videos is a relatively simple and rapid task that can be carried out with various low-cost digital cameras, which capture the entire scene around the photographer. The acquisition of 360° photographs is a powerful solution for rapid inspection and documentation of historic buildings and sites, the proposed work tries to integrate additional information by digitally editing image content. Editing tools for 360° images are integrated into a few commercial software packages (such as PhotoShop or Affinity Editor), overcoming the limitations concerning equirectangular mapping, i.e., the projection used to store such images and videos. The platform uses geospatial information to provide access to the original and rendered images and 360° videos for rapid understating of the actual conditions of the site. The proposed workflow differs from traditional 2D and 3D architectural rendering for the use of equirectangular projections taken with low-cost 360° cameras. Architectural renders are often used in different projects to provide a photorealist visualization of the designed interventions and changes
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