the numerical one is currently inevitable. It facilitates management, handling, the safeguard and the division of all kinds of documents. To digitize your documents, there is nothing better than professional digitalization, i.e. that using of the professional techniques. Those are mainly based on the scanning. This last is summarized primarily by the conversion of the levels of light and the colors of the documents into binary data. The supports are of this fact subjected to the sweeping of a luminous ray. Then, a sensor will convert the light which is either considered, or direct in an electrical signal. The first technique of professional digitalization uses a scanner flat. This type of scanners, rather widespread, arises in two various forms, distinguished by the mobility or not of its sensors. They are used for the digitalization of all kinds of document, in particular the transparent documents. The scanners flat comprise pass-sheets enabling him to digitize in mass flying pages. In general, the quality of digitalization in bitonal of these scanners flat is rather average. Professional digitalization also uses office automation scanners. The latter are adapted to almost all types of documents. They function using a technique called linear scanning comprising of the photodiodes placed in lines or bar. For an integral analysis, these photodiodes traverse the length of the document. Thus, they manage to carry out an analysis line after line. In the office automation world, one also uses scanners said “to run”. Those are intended mainly to digitize the data on loose leaf of general format. They employ a process similar to that of a fax, i.e. its technique consists in involving the document in a device where the sensor and the mirror remain motionless. The other techniques used for digitalization call upon professional scanners with slides. This type of scanner is the ideal solution for the digitalization of the slides or the transparent documents. They make use of the chargers of document quasi-automatic. The professional scanners with slides are known for their satisfactory result. It results from it a chromatic quality of digitalization and a perfectly high resolution. This result is explained in particular by the fact why the light, which is direct, crosses the transparent supports. In order to digitize your documents using a professional technique, also made call to drum scanners. Those use the technique of digitalization in mode not. In this case, the analysis of the documents by the light is done by rolling up them around a cylinder. It takes place pixel by pixel. This rather long mechanism offers an incomparable result of digitalization, i.e. a result of which the resolution and colorimetric quality largely exceed the other techniques. In spite of its quality, this technique can however be used only in precise formats of documents. It is necessary thus that the documents have a thickness lower than a millimetre to be able to be rolled up in the cylinder. To digitize your books, the professional world places at your disposal the scanners books. This method particularly addresses to the collectors books and the libraries. The scanners manage to digitize all kinds of format of books. They comprise a very roomy plate returning possible the treatment of the books having a A1 format and very thick bindings. Certain machines can even be used for the books which open only on one very limited angle (90° or 60°). To work with this technique, the open books the cover in bottom, are placed on the plate. According to the type of scanner used, it can either analyze the optical image of the books, or to sweep the documents in order to produce a fixed number of pixel per millimetre. In the first case, the documents are enlightened using the sources of light located on the sides of the scanner. Indeed, the result is rather average since it is rather difficult to have a homogeneous lighting of all the book. On the other hand, the scanners using the sweeping of the document offer a constant resolution on all kinds of format of the book. For an automatic professional digitalization, one can use automatic scanners of book. They make it possible to have a very interesting output (3 000 pages per hour without human intervention). Put aside the techniques of scanning, professional digitalization is still carried out using the numerical cameras. With this intention, please use professional cameras with systems with bar. The latter can be used for all kinds of documents. Their technique consists in sweeping the whole of the document. In spite of the time of relatively long treatment, they offer a digitalization of good quality very.
Publié le 30 novembre -1 | Numériser your documents
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