digitalization professionnelle

These numerical files will constitute data-processing databases and will be treated on computer supports, generally using a computer and with the support of adequate software. The interest of digitalization is developed especially in the protection and the use of the numerical files. The use of these files always showed that they are much more practical to handle and manage that the analogical objects, by the fact that digitalization offers to the files obtained a vast variation of options of handling, according to the types of files, with tiny risks to damage them. Digitalization finds its place in various activities but more primarily in the professional framework. The means of digitalization professionnelleAvant all, digitalization always requires converter-analogical numerical, more commonly known under the name of Analog/DIGITAL Converter (ADC). These analog-to-digital converters can be very varied according to the nature of the analogical object to convert. Just as the processes of digitalization to be followed depend particularly on the characteristics of these converters. The analog-to-digital converter more used in the professional field is undoubtedly the scanner. This apparatus is indeed an excellent means of digitalization of documents (texts, images photographs, etc). It is equipped with several sensors known as sensors Charge Coupled Device (CCD). The office automation scanner, or scanner flat, an alternative of the scanner, adopts the linear process of scanning, i.e. the document to be digitized will be swept and analyzed on each line, ones after the others. It can also be used to digitize of the documents which have the characteristic to be transparent and slides. It incorporates a master key ? sheet which automatically offers the advantage of scanner sheet after sheet the pages of a document. It should be noted that these office automation scanners are not compatible with the sheets which exceed the format A3.Les scanners of book, sometimes called “scanners with opened book”, have, contrary to the office automation scanners, a more important surface of scanning, and are compatible with a2 format with a binding of a few centimetres. Other products of high-end of the same type of scanner adopt a surface of scanning of the Roberval model and can accommodate a1 format with a binding reaching the fifty centimetres. These scanners also allow the scanning of the books which can open only to sixty degree. The scanners with open books are available under two models very different on quality from the result obtained after digitalization. The first model is that which proceeds by the optical analysis of the page of the document. The sources of light are laid out on the sides thus generating an awkward variation of luminosity of the numerical file obtained. The second model is that whose process of digitalization consists in sweeping the line page by line, thus offering a result definitely more preferable compared to that of the precedent. Moreover, the scanners of microforms and the scanners of slides and transparencies are alternatives of scanner which are especially used at ends more specific (digitalization of slides, etc) the cameras to their turn are apparatuses of digitalization of the photographs taken at the moment even by the apparatus itself. One finds on the market two very distinct models of which the apparatus for amateur and the professional apparatus. A great difference is noticed already in the resolution of the digital photograph obtained with each of the two alternatives. The apparatus amateur is faster on digitalization but the resolution is weaker with dimensions 700 X.500 pixels in twenty four bits, while the professional model is slower on digitalization but with a quality of image of high-definition being able to reach 6000 X 8000 pixels in twenty four bits or thirty six bits. However, the professional apparatuses do not have an important built-in memory and must always be connected to a computer whereas the apparatuses amateurs have an entry of memory flash for the storage of the files photos.