Figure 1
![Figure 1](http://media.springernature.com/full/springer-static/image/art%3A10.1186%2F1471-2407-13-278/MediaObjects/12885_2012_Article_3909_Fig1_HTML.jpg)
Diffuse reflectance (DR) imaging set-up and image processing. (a) Schematic of the diffuse reflectance imaging system (DRIS) and (b) photo of the oral cavity of a patient with verrucous growth in the left commissure, typical set of monochrome images recorded (c) at 545 and (d) 575 nm, (e) computed DR ratio (R545/R575) image and (f) pseudo colour mapped ratio image. Color palette shows the range of median pixel intensity values for lesion discrimination.