How Does Digital Photography Work

How Digital Photography Works

Digital photography is catching up and it seems that most people have already made the switch. For some people, it is because of convenience that they decided to switch. For some, they think it’s about time. But what does digital photography offer that has a lot of people getting into this age-old field?

First of all, digital cameras are unlike traditional film cameras. Whereas the latter depended on film, chemicals and a mechanical process in order to view your images, digital cameras now do not have such a limitation. With digital cameras, you do not even have to have paper on hand in order to see what you’ve taken. You can immediately see the images that you’ve taken at a press of a button. Whatever convenience that the non-electric cameras of yesterday offered, the digital cameras of today simply doubled.

Essentially, a digital picture is composed of a long string of 1s and 0s that basically represent minute colored dots or pixels that make up a digital picture. The usual method of taking a digital picture is using a film camera to capture the image on to the film, chemically printing it on photo paper and finally using a digital scanner to be able to digitally record the light patterns as different series of pixels. Nowadays, you can directly sample the original light values that essentially bounce off your subject and break it down into series of pixel values. This is how digital cameras work. Instead of having a strip of film capture the light that bounces off the subject, a device that is very much like a semiconductor that is contained within the digital camera captures the image as digital data. Then, after the data is recorded as a series of pixels of colors with different hues and tonal values, digital camera records that bulk of data in a memory storage device instead such as a removable memory card.

Since digital cameras do not use any film, they employ digital sensors which transform light values into varying electrical charges. This particular image sensor that some cameras use is called a CCD or a charge coupled device. There are other digital cameras which use a complementary metal oxide semiconductor (CMOS) instead. Both types of technologies are able to transform light into electrons. These electrons in turn are then read by the sensor to display color values when viewed in the display screen.

Author: Amy Grant

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