Indeed, among other things, they detect edges, movement, and preprocess color from RGB to something conceptually closer to YUV (with color encoded along two contrast axes: red-green and blue-yellow).<p><a href="https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;YUV" rel="nofollow">https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;YUV</a>