Color & Images

A pixel is three stored numbers. Watch one decoded through the sRGB curve to light, weighed for luminance, read for hue and saturation, and encoded back, and see why blends must happen on light.

One function from an input level to an output level: black and white points, gamma, and an S for contrast, read off a histogram and applied to every pixel. What Levels and Curves do.

A rendered scene holds light far above white and a display stops at 1. Clamp, Reinhard, a white point, and the ACES curve each fold the range their own way, one row traced pixel by pixel.

Balance the light, expose it, lift, gamma, and gain, pull toward or push from grey, tint shadows and highlights apart, then encode: one short pipeline every pixel runs, in that order, on linear light.

Bake a grade into a lattice of colours, then answer every pixel by weighing the eight nodes around it: the table that carries a look from a grading suite into a game, a camera, or a phone.

Lay nine weights over every pixel and its neighbours and write the weighted sum: a blur, a sharpen, and an edge finder are the same loop with different numbers, and the edge rule decides the border.