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Figure 4

Figure 4: Error in estimating the displacement tex2html_wrap_inline811 of a particle location from the digitizing grid as a function of the size w of the mask used for centroid refinement. Heavy lines are quadrature sums of the error estimates in eqns. (12) and (13). Circles are Monte-Carlo calculations for Gaussian surfaces of revolution with additive noise tex2html_wrap_inline815 and halfwidths s = 6 pixels (a) and s = 2 pixels (b). In both cases, the error estimate provides an adequate value for both the optimal kernel support, w, and for the accuracy of the position estimate at that value.

David G. Grier
Mon Mar 11 23:01:27 CST 1996