\(m=\left(\frac{n\sum{{(\delta}_{\text{raw}\left(\text{std}\right)}\times\delta_{\text{true}\left(\text{std}\right)})-\sum\delta_{\text{raw}\left(\text{std}\right)}\sum\delta_{\text{true}\left(\text{std}\right)}}}{n\sum\left(\delta_{\text{raw}\left(\text{std}\right)}\right)^{2}-\left(\sum\delta_{\text{raw}\left(\text{std}\right)}\right)^{2}}\right)\) Eq. 4
\(b=\left(\frac{\sum\delta_{\text{true}\left(\text{std}\right)}-m\sum\delta_{\text{raw}\left(\text{std}\right)}}{n}\right)\) Eq. 5
\(\delta_{\text{true}\left(\text{sample}\right)}=\delta_{\text{raw}\left(\text{sample}\right)}\times m+b\) Eq. 6