For example, the black and white pictures can be expressed in terms of pixels, which are the only eight bits long. If you are familiar with the binary arithmetic, you know that 8-bit number can represent the decimal numbers 0 to 256. A black and white photos can not, therefore, a total of 0 (zero) to 255 shades of gray, and black and white (256).
The color is represented in greater numbers. 16 bits/pixel, for example, it is necessary to have 65,536 different shades of the color scale. 24 bits/pixel can represent more than 16 million different colors.
Most digital cameras use 24 bits per pixel, but some of the professional equipment is presented in a colour resolution of 48 bits per pixel, more than 280 billion different shades.
The traditional photography, digital vs resolution photography
Several factors affecting the quality of the digital camera, but most usually seen pixel as important. Choosing an adequate resolution of a pixel depends a lot on the size of the photos you want to print.
Keep in mind that a picture of the number of pixels is not changed, so the pictures larger dimensions have fewer pixels per inch, which results in a loss in detail, if the image size is too large.
Photo Labs are usually printed at 300 pixels per inch, so using this as a measure of the standard, you can calculate how many megapixel camera should have pictures.
Most of the results of two-megapixel camera is 300 pixels per inch is 5.8 "x 3.8"-less than the standard 4 x 6. Camera megapixels and the four print size 8.2 "x 5.4" is 300 pixels per inch.
Of course, there is nothing to prevent the larger images on printing. Printed at 200 pixels per inch photos are a little less dramatic, but still perfectly acceptable for many purposes. This resolution, you can search for pictures of up to 8.7 "x 5.8" two megapixel camera, and a 12.2 "x 8.2" the four megapixel camera.
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