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Photographs of the Atrium
The following page illustrates the problems that might arise during comparison of the rendered images against the corresponding photographs of real-world environments.
All presented photographs were taken in the same lighting conditions.
The atrium is a very challenging environment to take photographs at the
night time because of mixed fluorescent and incandescent lighting. The
results obtained using the
standard photographic techniques were not satisfactory.
||Picture taken using a Nikon F4 camera with lens Nikkor 28mm.
Film FUJICHROME daylight ISO 400 was used. Almost the same results were obtained using a standard Fujicolor film.
Colors are washed and the overall photograph tone is too yellowish; lights in the corridor are really out of gamut. Shadows and highlights are too pronounced.
|Picture taken using a Nikon F4 camera with lens Nikkor 28mm.
Film FUJICHROME Tungsten ISO 64/19 was used.
The picture looks somewhat better than the one taken with the standard film, but it is blueish and even greenish in the corridor because of the halogen lighting. Highlights are too pronounced.
|Picture taken using a Minolta RD-175 digital camera with lens 60mm.
The pictures of the upper and lower atrium parts were taken in 2 steps and then assembled.
Although colors lack in contrast, the digital photograph tone is closer to reality than for pictures taken using the standard photographic techniques.
All images presented below were rendered using the Density Estimation Particle Tracing (DEPT) global illumination technique described in the reference . The technique was implemented as a part of the Inspirer system (Integra, Inc.).
"Artistic" approach with manual tuning of surface reflectances and colors
Physically-based lighting simulation using the measured BRDF values
Physically-based lighting simulation using the averaged
specular and diffuse reflectances
(We refer to this approach KdKs)
Direct lighting only
Panoramic image created by Edward Kopylov.There is also an interactive panorama based on the image above.
Note: It works only with Microsoft Internet Explorer.
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