What every coder should know about gamma (2016)

Table of contents A short quiz The arcane art of gamma-correctness What is gamma and why do we need it? Light emission vs perceptual brightness Physical vs perceptual linearity Efficient image encoding The gamma transfer function Gamma vs sRGB Gamma calibration Processing gamma-encoded images Effects of gamma-incorrectness Gradients Colour blending Alpha blending / compositing Image resizing Antialiasing Physically-based rendering Conclusion References & further reading General gamma/sRGB info Linear lighting & workflow (LWF) Bonus stuff A short quiz If you have ever written, or are planning to write, any kind of code that deals with image processing, you should complete the below quiz.