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Two new DIY methods allow anyone to produce high-quality images with basic software

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In spite of its speed and efficiency, digital photography frequently fails to accurately depict the object being investigated. Using 3-D scanning to make high-quality visualizations has evolved in recent years, but the expense of the equipment and the time required to produce a model can be problematic.

The ability to visually represent artefacts, whether inorganics like stone, ceramic and metal, or organics such as bone and plant material, has always been of great importance to the field of anthropology and archaeology.

For researchers, educators, students and the public, the ability to see the past, not only read about it, offers invaluable insights into the production of cultural materials and the populations who made and used them.

Two new DIY methods allow anyone to produce high-quality images with basic software
Two new DIY methods allow anyone to produce high-quality images with basic software

Digital photography is the most commonly used method of visual representation, but despite its speed and efficiency, it often fails to faithfully represent the artefact being studied. In recent years, 3-D scanning has emerged as an alternative source of high-quality visualizations, but the cost of the equipment and the time needed to produce a model are often prohibitive. 

Now, a paper published in PLOS ONE presents two new methods for producing high-resolution visualizations of small artefacts, each achievable with basic software and equipment. Using expertise from fields which include archaeological science, computer graphics and video game development, the methods are designed to allow anyone to produce high-quality images and models with minimal effort and cost.

The first method, Small Object and Artefact Photography or SOAP, deals with the photographic application of modern digital techniques. The protocol guides users through small object and artefact photography from the initial set up of the equipment to the best methods for camera handling and functionality and the application of post-processing software.

The second method, High Resolution Photogrammetry or HRP, is used for the photographic capturing, digital reconstruction and three-dimensional modelling of small objects. This method aims to give a comprehensive guide for the development of high-resolution 3D models, merging well-known techniques used in academic and computer graphic fields, allowing anyone to independently produce high resolution and quantifiable models.

“These new protocols combine detailed, concise, and user-friendly workflows covering photographic acquisition and processing, thereby contributing to the replicability and reproducibility of high-quality visualizations,” says Jacopo Niccolò Cerasoni, lead author of the paper. “By clearly explaining every step of the process, including theoretical and practical considerations, these methods will allow users to produce high-quality, publishable two- and three-dimensional visualisations of their archaeological artefacts independently.”

The SOAP and HRP protocols were developed using Adobe Camera Raw, Adobe Photoshop, RawDigger, DxO Photolab, and RealityCapture and take advantage of native functions and tools that make image capture and processing easier and faster. Although most of these softwares are readily available in academic environments, SOAP and HRP can be applied to any other non-subscription based softwares with similar features. This enables researchers to use free or open-access software as well, albeit with minor changes to some of the presented steps.

DIY digital archaeology – Workflow and computational steps for the ‘SOAP’ and ‘HRP’ Methods

Both the SOAP protocol and the HRP protocol are published openly on protocols.io. 

“Because visual communication is so important to understanding past behavior, technology and culture, the ability to faithfully represent artefacts is vital for the field of archaeology,” says co-author Felipe do Nascimento Rodrigues, from the University of Exeter.

Even as new technologies revolutionize the field of archaeology, practical instruction on archaeological photography and three-dimensional reconstructions are lacking. The authors of the new paper hope to fill this gap, providing researchers, educators and enthusiasts with step-by-step instructions for creating high quality visualizations of artefacts. 

Image Credit: Getty

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