640x480="307,200" pixels.
Each pixel displays a color. In order to represent the color of each pixel numerically, with enough variety to satisfy our eyes, we need a very large range of different possible color values. There are many different ways to represent colors digitally. A standard way to describe the color of each pixel in computers is to break the color down into its three different color components —red, green, and blue ( a.k.a. RGB)—and an additional transparency/opacity component (known as the alpha channel). Most computer programs therefore store the color of a single pixel as four separate numbers, representing the alpha, red, green, and blue components (or channels). This four-channel color representation scheme is commonly calledARGB or RGBA, depending upon how the pixels are arranged in memory.
0 to 255
No comments:
Post a Comment