• Public

  • Public
  • Network
  • Groups
  • Featured
  • Popular
  • People

The second problem with the perception of rainbow colors is that the perceptual changes in the colors are not uniform. The colors appear to change faster in the cyan and yellow regions, which can introduce artifacts in those regions that do not exist in the data. The colors appear to change more slowly in the blue, green, and red regions, which creates larger bands of color that hide artifacts in the data. We can see this effect in the following two images of a spatial contrast sensitivity function. The grayscale on the right faithfully reproduces the function. However, the rainbow colors on the left hides the variation in low contrast regions and appears less smooth in the high-contrast regions.