From the course: Exploring Photography: Shooting in Raw Mode
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What is a digital photo?
From the course: Exploring Photography: Shooting in Raw Mode
What is a digital photo?
- The raw data that comes off of an image sensor is a collection of numbers representing how much light struck each pixel on the sensor. Some of those numbers represent red pixels, some green, and some blue. In this last movie, I said that this raw data does not actually represent a finished image as we expected. So, what do we expect in a finished image? A colored digital image is composed of a grid of colored dots called pixels or picture elements. Each pixel is composed of three different numbers. One representing the amount of red in the pixel. Another representing the amount of green, and of course, the third representing the amount of blue. This data is stored in three different channels in the image. One channels contains all of the red information, another, all of the green, and the third, all of the blue. When those channels are combined, we see a full color image. The problem with a RAW file is that each pixel only represents a single channel. A red filtered pixel, for…
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