Techniques for composition identification of an anatomical target

A method for calibrating a composition identification system, the method comprising:

• receiving light at an optical sensor from a substantially losslessly reflective reference target;
• determining a first spectral response of the light across a range of wavelengths;
• determining whether a first spectral intensity corresponding to a first wavelength of the first spectral response is below a first threshold;
• increasing an exposure duration of the optical sensor for the first wavelength in response to determining the first spectral intensity corresponding to the first wavelength of the first spectral response is below the first threshold to provide a calibrated first exposure duration;
• determining whether a second spectral intensity corresponding to a second wavelength of the first spectral response is above a second threshold;
• and
• decreasing a gain of the optical sensor for the second wavelength in response to determining the second spectral intensity corresponding to the second wavelength of the first spectral response is above the second threshold.

A method for calibrating a composition identification system, the method comprising:

• receiving light at an optical sensor from a substantially losslessly reflective reference target;
• determining a first spectral response of the light across a range of wavelengths;
• determining whether a first spectral intensity corresponding to a first wavelength of the first spectral response is below a first threshold;
• increasing a gain of the optical sensor for the first wavelength in response to determining the first spectral intensity corresponding to the first wavelength of the first spectral response is below the first threshold to provide a calibrated first exposure duration;
• determining whether a second spectral intensity corresponding to a second wavelength of the first spectral response is above a second threshold;
• and
• decreasing a gain of the optical sensor for the second wavelength in response to determining the second spectral intensity corresponding to the second wavelength of the first spectral response is above the second threshold.