Parallel Feature Extraction - High-Throughput Image Reconstruction and Analysis - page 156

Figure 6.11 (a) Enlarged image of the edge gradient map. (b) Enlarged image of the normalized
gradient vector flow field.
To illustrate this process, we used the alpha-shapes model [12] to render 3D
views created from the data in Figure 6.12. This is depicted in Figure 6.13.
6.5.3 Related Work
The use of snake models to extract contours from images remains an active research
topic. Cai et al. [7] have improved the gradient vector flow snake model [40] to
address problems when two axonal contours are close together.
Figure 6.12 A partial 3D reconstruction shown by estimating the contour over successive slices.