This diagram explains the texturing of the gigapixel image of Stela "M". The hieroglyphics are the first ever found that describe how the large obelisks were transported onto ships to be taken to their final installation. Read more about this here, xrez.com/case-studies/cultural-heritage/sunken-treasures-of-the-nile/
We could not take a traditional gigapixel image or a "head-on" image because the Stela was close to face down and there was very little room in front of it due to the boulders. Instead we shot extreme close-ups of the surface using a 21 Megapixel 1Ds MIII focusing our efforts on the hieroglyphics and used Photosynth to extract the camera poses for 131 cameras. Next we re-projected the images onto a laser-scan of the Stela's surface. These 131 renders were then blended together and put in a tiled viewer to be displayed interactively on the web.
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