NEWS_SHI to offer free lecture on practical, scientific use of photogrammetry

NEWS_SHI to offer free lecture on practical, scientific use of photogrammetry

Posted By:
Kathy Dye
Kathy Dye
Published On: December 22nd, 2020

Lecture to focus on its use in cultural heritage

Sept. 6, 2019

(Flyer) (About 3D Photogrammetry)

Sealaska Heritage Institute (SHI) is offering a free, public lecture this month on the practical and scientific uses of photogrammetry in cultural heritage.

Photogrammetry is the science of making measurements from photographs. The input to photogrammetry is photographs, and the output is typically a map, a drawing, a measurement, or a 3D model of some real-world object or scene.

The technique has applications in cultural heritage, as it allows for 3D documentation of objects, which can later be studied in-depth by students remotely. The technology could potentially make old pieces held by museums around the world available to artists who would not otherwise have access to their ancestors’ work.

In this three-hour session, the nonprofit Cultural Heritage Imaging will present 3D examples, discuss the core principles of photogrammetry, show equipment requirements, and demonstrate the image capture of a subject using the technique. The lecture marks the beginning of SHI’s 3D photogrammetry project, which aims to make 3D images of historical Northwest Coast masterpieces available for study.

The lecture is scheduled from 9:30 am-12:30 pm, Saturday, Sept. 21, at Shuká Hít (Clan House), Sealaska Heritage Institute, 105, S. Seward St. in Juneau. 

About 3D Photogrammetry

Fundamentally, photogrammetry is about measurement: the measuring of the imaging subject. To perform high-quality photogrammetric measurement, the photographer capturing the photogrammetry data set must follow a rule-based procedure. This procedure will guide users regarding how to configure, position, and orient the camera towards the imaging subject in a way that provides the most useful information to the processing software and minimizes the uncertainty in the resulting measurements. These measurements will be as good or as poor as the design of the measurement structure, or lack thereof, that underlies the collection of the photographic data.

Recent technological advances in digital cameras, computer processors, and computational techniques, such as sub-pixel image matching, make photogrammetry a portable and powerful technique. It yields extremely dense and precise 3D surface data with an appropriately limited number of photos, captured with standard digital photography equipment, in a relatively short period of time. In the last five years, the variety and power of photogrammetry and related processes have increased dramatically.

Sealaska Heritage Institute is a private nonprofit founded in 1980 to perpetuate and enhance Tlingit, Haida and Tsimshian cultures of Southeast Alaska. Its goal is to promote cultural diversity and cross-cultural understanding through public services and events. SHI also conducts social scientific and public policy research that promotes Alaska Native arts, cultures, history and education statewide. The institute is governed by a Board of Trustees and guided by a Council of Traditional Scholars, a Native Artist Committee and a Southeast Regional Language Committee.

CONTACT: Kathy Dye, SHI Media Specialist, 907.321-4636,  

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