Fig. 1. Joint discs and traces in a rectangular sampling window (Song, 2005)
Fig. 2. Variation of the parallelepiped volume of disc center according to the change in joint diameter for a constant trace length (Song, 2005)
Fig. 3. The trace center zones of dissecting traces whose partial length within a window is l΄ (Song, 2009)
Fig. 4. The trace center zones of transecting traces according to the whole and partial trace lengths (Song, 2009)
Fig. 5. Model for JCV calculating in cylindrical window (Jeon et al., 2011)
Fig. 6. Trace types in cylindrical window (one trace by the one joint)
Fig. 7. Trace types in cylindrical window (two traces by the one joint)
Fig. 8. Algorithm of JCV calculation using Monte Carlo simulation
Fig. 9. Curved window survey
Fig. 10. Horseshoe window survey
Fig. 11. Hypothetic population distribution for Monte Carlo simulation
Fig. 12. Estimation results of joint size distribution in curved window
Fig. 13. Estimation results of joint size distribution in horseshoe window
Table 1. JCV matrices used in this study
Table 2. Error rates of estimation in curved window
Table 3. Error rates of estimation in horseshoe window
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