A digital system is a technology that uses discrete, discontinuous representations of information or works in a discontinuous manner. This is contrasted with continuous, or analog systems which behave in a continuous manner, or represent information using a continuous function. Although digital representations are discrete, the information represented can be either discrete, such as numbers and letters or continuous, such as sounds, images, and other measurements.
The history of modern digital technology can be traced back to the work on semiconductors--the materials of choice for computer chips--by Michael Faraday in the late nineteenth century. It was not until 1971, however, that IBM sowed the seeds for a revolution in personal computing with its PC 5150 business computer. By 2000, the semiconductor industry worldwide was worth $200 billion.
Unlike analog voltage or current signals, digital signals do not vary smoothly and continuously, but rather in steps or increments. Digital technology generates, stores and processes data as a string of binary digits, or "bits"--ones and zeroes--and its role in society since the early 1990s has been compared to that of the railroad during the Industrial Revolution. Digital Photography Technology:
Digital Photography Technology has taken over the world. Everyone wants a digital camera. The advantages of Digital Photography Technology are phenomenal. You have the ability with a digital camera to take a picture and immediately look at the finished image, so it can then be sent it anywhere in the world within minutes or make a print. That is something that was not even considered just a few years ago. There is no reason why any person can not take a good picture with the wide range of digital cameras that are available. Cameras for Digital Photography Technology are available in a price range starting from one hundred to thousands of dollars and will all take quality pictures. Digital cameras are so popular today because they are so much fun to use and so versatile. Just pick up the digital camera, point and shoot and in a matter of seconds you have a high-quality digital photo. Digital cameras as to film cameras use electronic devices to record the image as binary data. This facilitates storage and editing of the images on personal computers and also the ability to show and delete unsuccessful images immediately on the camera itself. Digital cameras now outsell film cameras and include features not found in film cameras, such as, to shoot video and record audio. Some other devices, such as mobile phones, now include digital photography technology features. Taking pictures with a digital camera is no different than with a film camera, except there is no film to change. Inserting a new memory card can be changed in the brightest of light. Hundreds to over thousands of pictures can be taken on a single digital memory card depending on its size.
Merits of Digital Technology in Photography:
1. Immediate gratification:
When you have a chance to make a very important photograph, there is no denying the fact that being able to instantly look at a histogram, verify your exposure, double check your composition, etc., is very rewarding and reassuring.
2. You have the ability to immediately deliver the image to client:
Clients LOVE being able to get their images quickly. In the wedding and portrait business or the advertising world, there are few more powerful phrases than; "You can have the picture today." 3. Instant ISO/white balance change from shot-to-shot:
In the film days, I would think nothing of rewinding a roll of Velvia if it got too dark to shoot at ISO 50. I would just move to Provia 100 and waste the rest of the roll. Changing film like that is not only expensive, it is time consuming. With my digital camera, I hit a button and can change the ISO from 100 to 3200...