## 3 Results
### Impact of the Signal-to-Noise Ratio in the Measurements
quantification of \(\Delta C_{HbO_{2}}\) is not accurate (low \(\sigma(E_{HbO_{2}})\) values and high \(m(E_{HbO_{2}})\) values) and the quantification of \(\Delta C_{Hb}\) is accurate. Moreover, the mean quantification errors in \(\Delta C_{HbO_{2}}\) reach a plateau for an SNR value equal to 110. For the hyperspectral camera with an SNR value equal to 10, the quantification errors in \(\Delta C_{HbO_{2}}\) are equal to 232% \(\pm\) 173% when the spectral correction is applied and 259% \(\pm\) 193% when it is not applied. The quantification errors in \(\Delta C_{Hb}\) are equal to 235% \(\pm\) 176% when the spectral correction is applied and 267% \(\pm\) 201% when it is not applied. When the SNR value is equal to 1000, the quantification errors in \(\Delta C_{HbO_{2}}\) are equal to 8% \(\pm\) 6% when the spectral correction is applied and 28% \(\pm\) 6% when it is not applied. The quantification errors in \(\Delta C_{Hb}\) are equal to 8% \(\pm\) 6% when the spectral correction is applied and 52% \(\pm\) 5% when it is not applied. For high SNR values, the quantification of \(\Delta C_{HbO_{2}}\) and \(\Delta C_{Hb}\) is accurate when the spectral correction is applied and not accurate when the spectral correction is not applied (low \(\sigma(E_{n})\) values and high \(m(E_{n})\) values). When the spectral correction is not applied, the mean quantification errors in \(\Delta C_{HbO_{2}}\) and \(\Delta C_{Hb}\) reach a plateau for an SNR value equal to 200 and 110, respectively. When a three-chromophore system is considered with the RGB camera (SNR = 10), the quantification errors in \(\Delta C_{HbO_{2}}\), \(\Delta C_{Hb}\), and \(\Delta C_{oxCCO}\) are equal to 712% \(\pm\) 531%, 822% \(\pm\) 617%, and 9427% \(\pm\) 7011%, respectively. When the SNR value is equal to 1000, the quantification errors in \(\Delta C_{HbO_{2}}\), \(\Delta C_{Hb}\) and \(\Delta C_{oxCCO}\) are equal to 164% \(\pm\) 10%, 138% \(\pm\) 12%, and 1431% \(\pm\) 138%, respectively. The mean quantification errors in \(\Delta C_{HbO_{2}}\), \(\Delta C_{Hb}\), and \(\Delta C_{oxCCO}\) reach a plateau for an SNR value equal to 110, 130, and 130, respectively. For high SNR values, the quantification of \(\Delta C_{HbO_{2}}\), \(\Delta C_{Hb}\), and \(\Delta C_{oxCCO}\) is not accurate (low \(\sigma(E_{n})\) values and high \(m(E_{n})\) values). For the hyperspectral camera with an SNR value equal to 10, the quantification errors in \(\Delta C_{HbO_{2}}\) are equal to 345% \(\pm\) 267% when the spectral correction is applied and 328% \(\pm\) 248% when it is not applied. The quantification errors in \(\Delta C_{Hb}\) are equal to 486% \(\pm\) 379% when the spectral correction is applied and 496% \(\pm\) 382% when it is not applied. The quantification errors in \(\Delta C_{oxCCO}\) are equal to 2908% \(\pm\) 2190% when the spectral correction is applied and 2951% \(\pm\) 2201% when it is not applied. When the SNR value is equal to 1000, the quantification errors in \(\Delta C_{HbO_{2}}\) are equal to 10% \(\pm\) 8% when the spectral correction is applied and 33% \(\pm\) 8% when it is not applied. The quantification errors in \(\Delta C_{Hb}\) are equal to 14% \(\pm\) 11% when the spectral correction is applied and 41% \(\pm\) 11% when it is not applied. The quantification errors in \(\Delta C_{oxCCO}\) are equal to 90% \(\pm\) 68% when the spectral correction is applied and 91% \(\pm\)70% when it is not applied. For high SNR values, the quantification of \(\Delta C_{HbO_{2}}\) and \(\Delta C_{Hb}\) is accurate when the spectral correction is applied and not accurate (low \(\sigma(E_{n})\) values and high \(m(E_{n})\) values) when the spectral correction is not applied. The quantification of \(\Delta C_{oxCCO}\) is not accurate with and without spectral correction (low \(\sigma(E_{oxCCO})\) values and high \(m(E_{oxCCO})\) values). We can notice that the measurement uncertainty of \(\Delta C_{oxCCO}\) is similar for all SNR values with and without spectral correction.