1. A hyperspectral image calibration pad has at least one surface exterior to the body part with the following optical properties: a. at least 95% opaque to electromagnetic radiation over a predetermined wavelength range of at least 50 nanometers; b. has a predetermined reflectance of at least 1 percent to wavelengths of light over said wavelength range; c. has a reflectance value for at least a first wavelength within said 50 nanometer wavelength range that varies less than 10% over a desirable image region; and d. has a reflectance value for at least a second wavelength within said 50 nanometer wavelength range that varies less than 10% over a desirable image region.