Gallery of Separation Results
Here, we show several examples of our separation results. In each case, we mention the separation method we have used. In all cases, the scene image is the sum of the computed direct and global images. However, to bring out the details, for some of the scenes we have brightened the direct and global images by a scale factor (between 1 and 2) with respect to the scene image. By clicking on each of the thumbnail images shown below, you can see the corresponding high resolution image.
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Marble : From BSSRDF to BRDF
Method : Checkerboard
Resolution Scale = 1
Resolution Scale = 1/2
Resolution Scale = 1/4
Resolution Scale = 1/6
This example shows the separation results for a marble tile for different resolutions of imaging and illumination. For scale = 1, the resolution of the camera was set at the native resolution of 1024x768 and the separation was done with a checkerboard pattern with checkers of 4x4 projector pixels. For lower scales of 1/n, the resolution of the camera was reduced by aggregating n x n pixels and the checker size of the illumination pattern was increased to 4n x 4n. The images shown above correspond to scales 1, 1/2, 1/4 and 1/6 from top to bottom. At scale = 1, we see a slight direct component and a dominant global component. In contrast, at scale = 1/6, we see that the global component is nearly zero everywhere and the direct component is almost equal to the original image. This example shows how the BSSRDF of a translucent object dominates at fine scales, but reduces to a BRDF as one goes to coarser scales.