Area Fraction Fractionator formulas
)
                                                    
                                                        
- P(ref): Points hitting reference volume
 - Y: Sub-region
 - P(Y): Points hitting sub-region
 
)
                                                    
                                                        
- asf: Area sampling fraction
 - a(p): Area associated with a point
 
R e f e r e n c e s
Howard, C. V., & Reed, M. G. (1998). Unbiased Stereology, Three-Dimensional Measurement in Microscopy (pp. 170–172). Milton Park, England: BIOS Scientific Publishers.