Color Your World Digital
Both film and digital cameras create images by registering the amount of light in a scene. A digital camera works much like the human eye to translate that information into the colors that appear in the final image.
Many aspects of the human eye correspond to aspects of photography. Each eye has a lens, an aperture, and even a focal length, for example. In the following chapters you will learn that much of photography is quite simple once you understand how it works just like your eyes.
Light is made up of three primary colors: red, green, and blue. A digital camera captures the light intensity — sometimes called brightness value — of the red, green, and blue light. It records the brightness value for each color in separate portions of the image file, or color channels, then combines them to form a full-color image.
When images are created using these three primary colors of light, they are called RGB (red, green, blue) images. The RGB system is also called the additive color system, because when the three colors are combined, or added, in equal quantities, they form white. We look at RGB images when we view television sets, computer monitors, and scanned images.
