I didn’t know this before, but there is a colour space that is more appropriate to use for human viewing than RGB. YUV is made up of 3 components, but instead of mixes of the colours red, green and blue, it is composed of a luminescence value, and two chroma. Encoding in such a way can provide better transmission of pictures for human viewing than using the proportions of RGB.
Translating between the two is simple as And the inverse So, how does this make transmission of pictures better? The eye is typically most sensitive to brightness changes, which is recorded at the Y value. The U and V values stores information about colour. Most of this information can be thrown away. But wait, “Hold on, there’s a Y’ in the equations above, not a Y. You’re just trying to confuse me.” I hear you whine. Y refers to the quantity of light needed. However, what is more appropriate to encode is the electrical voltage/signal amplitude, Y’, needed to generate Y that we see.
- RGB or CMYK Guide for colour matching promos. (theodmgroup.com)
- Hue, Saturation, Lightness (hicksdesign.co.uk)