Fig. 6

Comparison of high-resolution virtual projection area (A _V), measured eight-point-projection area (A₈, filled diamonds), and calculated fixed eight-point projection area (A_{V8 fixed}, crosses). The average deviations relative to A _V were +10.2% (A₈) and −17.1% (A_{V8 fixed}). The line indicates the position of data points with A _V = A₈. The root mean square errors are 6.5 and 7.2 for A _V versus A₈ and A_{V8 fixed}, respectively