How can spectral radiances be computed from radiometric values?
Digital Numbers (DN) are converted to spectral calibrated radiances (L) using the following formula: Where: is the Spectral calibrated radiance, with units of (Luminance in French), is the Digital Number (0, 255), is the upper and lower spectral radiance limit, with units of , is the rescaled offset, with units of , is the rescaled gain, with units of . The lower and upper radiance limits are related to their correspondent DN, where the lower digital number and the upper digital number are respectively equal to 0 and 255.
