Fig. 2
Scatter plots of several artificial test images. Binary test images containing one point and/or a set of points were generated and convoluted with the RBFdirect. The values of a pair of normalized matrices (compare equation 2) are plotted against each other, resulting in a scatter plot. The sketches above the scatter plots represent the artificial test images (black box) with one fix (black X) and one moving point (red X) and, respectively, one fix cluster of five points (black Xs) and one moving point (red X). For Matlab, these images were realized as matrices of 500x500pixel is one, respectively, five fix points and one moving point (in the supplement). Density values below a threshold of 25 are excluded. a-c: In the upper line, two matrices each containing one single point are plotted against each other. The position or respectively the distance of these two are changed as described (e.g. point at M(1,1) against N(1,11) etc.). d-f: In analogy, one point in the lower line is plotted against one cluster consisting of 5 points