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                                        Main article: Digital preservation                                 Digital preservation in its most basic form is a series of activities maintaining access to digital materials over time. Digitization in this sense is a means of creating digital surrogates of analog materials such as books, newspapers, microfilm and videotapes. Digitization can provide a means of preserving the content of the materials by creating an accessible facsimile of the object in order to put less strain on already fragile originals. For sounds, digitization of legacy analogue recordings is essential insur...

             There are many collaborative digitization projects throughout the United States. Two of the earliest projects were the Collaborative Digitization Project in Colorado and NC ECHO - North Carolina Exploring Cultural Heritage Online, based at the State Library of  North Carolina.           These projects establish and publish best practices for digitization and work with regional partners to digitize cultural heritage materials. Additional criteria for best practice have more recently been established in the UK, Australia and the European Union. Wisconsin Heritage Online is a collaborative digitization project modeled after the Colorado Collaborative Digitization Project. Wisconsin uses a wiki to build and distribute collaborative documentation. Georgia's collaborative digitization program, the Digital Library of Georgia, presents a seamless virtu...

                 The term is often used to describe the scanning of analog sources (such as printed photos or taped videos ) into computers for editing, but it also can refer to audio (where sampling rate is often measured in kilohertz ) and texture map transformations. In this last case, as in normal photos, sampling rate refers to the resolution of the image, often measured in pixels per inch. Digitizing is the primary way of storing images in a form suitable for transmission and computer processing, whether scanned from two-dimensional analog originals or captured using an image sensor -equipped device such as a digital camera , tomographical instrument such as a CAT scanner , or acquiring precise dimensions from a real-world object, such as a car , using a 3D scanning device.                     D...

"Digitizer" redirects here. This article covers the general concept of digitization. For other uses, see Digitizer (disambiguation) .              InternetArchive book scanner           Digitizing or digitization is the representation of an object, image , sound , document or signal (usually an analog signal ) by generating a series of numbers that describe a discrete set of its points or samples . The result is called digital representation or, more specifically, a digital image , for the object, and digital form , for the signal. In modern practice, the digitized data is in the form of binary numbers , which facilitate computer processing and other operations, but strictly speaking, digitizing simply means the conversion of analog source material into a numerical format; the decimal or any other number system can be used instead.   ...

The term digitization is often used when diverse forms of information, such as text, sound, image or voice, are converted into a single binary code . Digital information exists as one of two digits, either 0 or 1. These are known as bits (a contraction of binary digits ) and the sequences of 0s and 1s that constitute information are called bytes . [ 3 ] Analog signals are continuously variable, both in the number of possible values of the signal at a given time , as well as in the number of points in the signal in a given period of time. However, digital signals are discrete in both of those respects – generally a finite sequence of integers – therefore a digitization can, in practical terms, only ever be an approximation of the signal it represents. Digitization occurs in two parts: Discretization The reading of an analog signal A , and, at regular time intervals ( frequency ), sampling the value of the signal at the point. Each such reading is called a sample a...