Blog | 5 Ways the Human Eye Impacts How We Do Video Compression
You don’t need to know much about the human eye to use video compression standards . However, if you want to understand why they are designed the way they are, or tune your compression, knowing a little bit about the human eye goes a long way. Here are 5 facts about the human eye that directly influence our compression standards.
1. When it comes to colors, the human eye sees green best, red second best, and a little bit of blue.
Impact: Algorithms and video gear that focus on capturing green more than other colors. Humans process brightness and color differently. Because we are most sensitive to green, the way we see brightness is determined by how much green we see in something. As a result, cameras capture more green than other colors. Part of why we use green screens is because they appear so bright for people, they don’t require as much lighting compared to other choices. We also use green screens because the green channel has more information, allowing for a cleaner key around a subject. The way we process color not only impacts what the camera captures, but how we set up color encoding. We tend to create algorithms that preserve green more than the other colors, because that’s what we’re most sensitive to!
