FIGURE 2:

Color-coded contrast and pseudocoloring. Color-coded contrast (A) increases visual sensitivity to shallow contrast by representing gray values as varying color hues, according to an arbitrary color LUT (B). Pseudocoloring (D–F) applies a single-hue LUT to a grayscale image (C), resulting in gray levels represented by color brightness. The original image is identical to the power-law transformation (γ = 3.0) from Figure 1.