Graphics Reference
In-Depth Information
Fig. 4. Reconstruction and tracking of dynamic fish surface
Fig. 5. Reconstruction and tracking of dynamic paper
The block size we used is small: 20×20 in this experiment due to the plenty of
texture on the surface. From Fig.3, we can see that when the deformation is smoothed,
the reconstructing and tracking result is very good, but for the sharp deformation case,
the result will be not perfect.
To solve the problem of sharp deformation, we can overlap the neighboring
blocks. Since the block center is the most accurate value in the whole block, and due
to the overlapping, the distance between the neighboring block centers will be
smaller, which can make the interpolated value in line with the four neighboring
block centers in local area closer to the actual value. Theoretically, the reconstructed
surface can approximate the ground truth by block overlapping of large size without
considering the computational required cost. Fig.3 shows the RMSE of the image
points (a) and reconstructed 3D points (b) on ground truth, and the top curve in both
(a) and (b) is the RMSE without overlapping, and the bottom one is the RMSE curve
with 50% block overlapping, from the figure, we can see that the RMSE is smaller
when block overlapping is considered.
3.2
Real Data Experiment
Real dynamic surfaces, such as paper, cloth and fish surface, are used to show the
result of reconstruction and tracking by our algorithm.
In our experiment, the size of the images is 1440×1080, and the block size selected
ranges from 30×30 to 50×50 according to the actual size of the surface and the
texture. For those surfaces with rich texture, small block size can be used because
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