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Enhancement of a photograph with depth information (courtesy of D. Scharstein and R. Szeliski [2003]). By computing the difference between the original and
a low-pass filtered version of the depth buffer, as encoded in the middle, we obtain an additional semantic information: the spatial relation between objects.
This function contains spatially interesting regions: orange regions represent background areas that are close to other occluding objects, while blue
regions represent boundary areas of foreground objects. In the image on the righthandside we use this information to slightly darken background areas.
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Enhancement of a complex botanical object. The so-called 'depth darkening' as described above is especially useful in the case of many small isolated
objects as it is usually found in complex botanical scenes. Here our method slightly darkens the interior of the tree, and in turn supports the perception
for this kind of objects by providing additional depth cues.
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Enhancement of a watercolor rendering. This result exemplifies the depth buffer unsharp masking applied in a non-photorealistic rendering pipeline. Instead of
altering tone or luminance, we mask the canvas at spatially interesting background regions to prevent drawing operations there. As a result, we obtain a clear
representation of the object structure, and can distinguish individual ivy leaves. Furthermore, the result demonstrates that our technique provides
interesting ways to produce special rendering styles, which may help to resembles the appearance of a painting technique more naturally.
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