Digital imaging was developed during the 1960s and 1970s, as an alternative to film cameras, as film cameras often had operational weaknesses that were sought to be overcome. The term itself refers to the digital creation of images, most often from some type of physical scene, and generally also refers to the processing, compression, storage, printing and display of such images.
The image itself can manifest in lots of different ways. It can be created directly from a particular physical scene by use of a camera or a similar type of device. This is one of the most common methods, and is also potentially the cheapest and easiest to perform by an amateur. Digital images can also be obtained from another image or an analogue medium, such as photographs and photographic film, and can be scanned into a computer. Technical images are often obtained by complex processing of non-image data, and can include images acquired with topographic equipment and radio telescopes.
Digital images can also be created by computing from a geometric model or a mathematical formula. Images like these include fractals, which can get impossibly intricate and complex, depending on the inputted mathematical formula. Image synthesis is arguably a more suitable name for this method, and is often known as rendering.
One of the problems with digital imaging that have emerged recently is digital image authentication. Areas of forensic science are now concentrating on analysing digital images to determine if they have been altered in some way, which in the case of copywriting, can be an illegal activity.
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