The
technology of microfilming a set of microform manufacturing processes on
various photographic materials, allows you to obtain photographically reduced
copies tens or hundreds of times from manuscripts, drawings, printed texts,
etc. one after another on one film. One type of microfilm is microfiche. It
usually contains a smaller number of frames located on one photographic plate
slide in several rows. For the Microfilm Scanning this is important.
·
Creating microfilms allows
access to rare sources and the ability to work with them outside the library or
museum, without causing them harm. This technology is widely used in the last
quarter of the XX century for compact storage of duplicate library and archival
funds and effective access to them. For several decades, an infrastructure has
been created in almost all large libraries and archives, on the basis of which
microfilm and microfiche technology is being created organizational units
(photo labs, microfilming centers); storage funds; rooms equipped with special
equipment for viewing, etc.
The
main disadvantage of microfilming technology is the need to use special
equipment for viewing microfilms. The wide distribution of computer
technologies in library and archival affairs has created the problem of
choosing a source for creating electronic copies of materials stored in them.
Electronic copies of archives and library collections can be created by
scanning both original materials and their microfilmed copies. In the case of
using microfilms as a source, there are two main ways to enter data into a
computer: For the Scanning Companies you can
choice.
·
Create enlarged photocopies
(make photos of the sheets) and enter them into the computer using conventional
scanners;
·
Scan microfilms using
professional slide scanners that have the ability to greatly increase, a wide
range of optical densities processed and high resolution.
This
article discusses some of the issues of technology and the selection of
microfilm scanning parameters using professional slide scanners.
Microfiche scanning technology
In
1999, in the prepress processes sector of the Educational and Scientific Center
of the State Printing University, experimental work was carried out on scanning
100 microfiches of the Polyansky bibliographic dictionary to create an
electronic copy. This work arose due to the fact that at that time there were
no printed versions of some volumes of this dictionary. There were no other
alternatives for creating their electronic copies, except on the basis of their
microfiche duplicate.
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