Figure 9
The histograms of the transmittance values of specific wavelengths are shown. For 520 nm (A) and 705 nm (D), the spectra of EAC, stroma, and squamous epithelium showed a high similarity in the probability densities (blue dotted rectangle). For the wavelengths, 655 nm (C) and 555 nm (B), the spectra of EAC and stroma against squamous epithelium showed differences in the probability density (grey dotted rectangle). Hence, the spectra values between 560 and 675 nm were used to classify these four structures. (a.u. aberrante units)
