Photogrammetry Blog Post 2: Photogrammetry Uses

The Bronze Age pots found in the Irish archaeology museum hold a very interesting history. The process of photogrammetry used for the capturing of my own Bronze Age pot was a method specific practice.
The bronze pot was placed within a lightbox. LED lights were placed at three points surrounding the item. Photogrammetry needs equal light on all parts of the object to ensure no shadows or shininess. The box was placed on a table ensuring that height became a problem for the practice. The larger LED light, which used a larger tripod, looked down from the top of the object. Chairs had to be used on either side of the lightbox to ensure the surrounding light. Balance becomes quite important here because the lights cannot move during the process of photogrammetry, otherwise the data will be corrupted because the common points cannot be found.
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The bronze pot was placed on a rotating table allowing for easy use of the Canon 60D on the tripod. Instead of moving around the object, like one would do with a larger object, the item could be spun using the table and photos then captured. The pot had to be turned each time, ever so slightly and the photo captured.
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Importantly, the curator at the museum had to flip the pot to its other side. This was to ensure that the inside and bottom of the pot was captured evenly to ensure a full model.
The inside of the pot would prove to be the most difficult to capture. As the pot was rotating and the angles of capturing had changed it became clearer that the inside of the pot was being captured correctly.

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