computeProb: Compute the probability of obtaining a higher correlation by...

In xhtai/cartridges: Algorithm to Compare Cartridge Case Images

Description

Given a reference distribution of correlation values of non-matches, compute the probability of obtaining a higher correlation, under the assumption that the two images are not a match, i.e. not from the same gun.

Usage

computeProb(corr, empiricalNull)

Arguments

corr	maximum correlation between two images, taking into account all translations and many rotation angles, e.g. the output of calculateCCFmax().
empiricalNull	the non-match distribution to compare the value of corr against. We suggest using the empirical null distribution based on all pairwise comparisons of non-matches in a known database.

Value

the probability of obtaining a higher similarity score by chance.

Examples

## Not run: 
computeProb(.1, rnorm(50, .07, 1))

## End(Not run)

xhtai/cartridges documentation built on June 1, 2019, 2:58 p.m.