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Pixel and Image Size Defined

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In order to understand the way digital camera provide quality pictures, an understanding of the way digital cameras use pixels and image size to produce the desired result. The first thing to understand about digital cameras and picture taking is with the pixels. The thing you need to remember is a digital image is a computer file that contains graphical information instead of text. Of this image, pixels make up the building blocks of these images. If you took an image and placed it in a very powerful microscope, you would see small adjourning squares in a matrix that are across the length and width of the image. Pixels are mainly monochromatic, in that each one is a single color that has been blended from three different colors: red, green, and blue.

Looking at it from a technical perspective, each pixel has a red, green, and blue component. Put all the pixels together you have a digital image, also referred to as image resolution. An example of this is if you have a screen that has 800 pixels wide by 600 pixels tall. This means the picture has an image resolution of 800 by 600 pixels, or 480 kilopixels. When looking at an image resolution there are two types to look at: image resolution; this is the actual image you see; and the print resolution that comes out of a printer.

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