0828-purity and completeness

CMB

Purity

(less bad points) this is because some fake signal would be inside the point sources identification.

The definition of purity is $1-\frac{N_{\text{fp}}}{N_R}$, $N_{\text{fp}}$ is false positive number. $N_{R}$ is the number of recovered point source.

Completness

(input should all be included)

The definition of completeness is $\frac{N_I}{N_{R}}$, $N_{I}$ is the input pointr source number. $N_{R}$ is the number of recovered point source.