Fig. 2.

(a) One planar image and each of four spatial frequency images are taken at phases 0 deg, 120 deg, and 240 deg, per wavelength. This process is repeated for four wavelengths, where modulated images from only one phase and one wavelength is shown. (b) The LUT takes diffuse reflectance measurements and calibrates each reading based on an included phantom with known optical and reflectance properties. Reflectance is calibrated from both the planar frequency $f_x=0{\mathrm{mm}}^{-1}$, and one other spatial frequency, this pixel is matched with a specific absorption and reduced scatter pair using an LUT much like that pictured. (c) Optical properties are fit for each pixel ($520\times 696$), forming the images pictured.¹⁰