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Figure 6
A comparison of reconstruction quality between the (a) single-slice (SSM) and (b) whole-block (WBM) modes of Tomosaic reconstructions. These images are of an xy reconstruction plane from a the charcoal sample described in §4[link], where y is in the vertical direction (the direction of the axis of rotation in our geometry with a horizontal illuminating beam from a synchrotron). The xy plane view is at the intersection between two tiled projection datasets, one above the other (see Fig. 3[link]); the y gradient image is also shown next to the reconstruction plane view. Because the SSM reconstruction does not perform sub-pixel alignment or blending between object slices in the vertical direction (so as to fit within the memory and computing power constraints of a single workstation), one can see a discontinuity at the tile intersection as indicated by an arrow. This discontinuity is removed in the WBM reconstruction, which includes aligment and blending in the vertical direction (thus demanding more memory and computing power, making it better suited for use on a parallelizable computing cluster).

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