Lesson 4 - RW, Culture - TECHNOLOGY - Page4
When photography was first invented, it could only record black and white images. The search for color was a long and arduous process.
One major breakthrough was James Clerk Maxwell's 1860 discovery that color photographs could be created using black and white film and red, blue, and green filters.
The three black and white images were then projected onto a screen with three different projectors, each equipped with the same color filter used to take the image being projected.
That's because a human eye is more sensitive to green than it is to the other two colors so green's colour accuracy is more important.
With the filters in place, each pixel can record only the brightness of the light that matches its filter and passes through it while other colours are blocked.
By combining these two interpolated colours with the colour measured by the site directly, the full colour of the pixel can be calculated.