background image
work and media (e.g. microfilm or
slides) that allow rapid, cheap digitisa-
tion of sufficiently good quality for
the Web (hybrid projects).
he impact of digital technology on
the dissemination of the cultural
content of archives, libraries and
museums has been revolutionary and is
still difficult to evaluate. However, the
advantages of digitisation for access are
clear and we can say that the digital age
and virtual culture are closely linked.
Online Treatment of Digital Images: To
make the retrieval of images as user-
friendly as possible, they are displayed by
means of a plug-in added to the browser
(Internet Explorer) which is automatical-
ly installed on the user's PC the first time
an image is accessed from AER. It allows
the user to perform a number of mani-
pulations on a particular image without
affecting the original file. One new fea-
ture of this image treatment is that it is
integrated into the user's browser and
does not require external processing or
image-editing programs, or involve the
complicated manipulation of copies on
the hard disc. The plugin supports a wide
range of the most popular image formats
including JPEG, GIF, TIFF, BMP, and
PSD for black and white (bitonal), grey-
scale, and colour documents, and provi-
des anti-aliasing for smooth presentation
of the picture at any size the user choo-
ses. It also supports multipage formats.
everal cursors are provided for selec-
ting an area, zooming in or dragging
the image across the screen. The user can
apply a variety of filters to the selected
area to improve the readability of a parti-
cular document. These filters can be app-
lied in three different intensities to
modify brightness and contrast, enhance
inks, smooth stains and background and
so on. They can be applied in additive
mode or reset at the user's convenience.
Images can also be rotated or presented
in reverse polarity if necessary (very use-
ful for negatives, for example).
his tool for the consultation of digi-
tal images on screen is both useful
and user-friendly for researchers and
members of the general public alike. To
prevent financial gain by third parties and
to protect the copyright of some docu-
ments, the program does not allow the
image to be downloaded or printed.
ccess to documents on the Internet
facilitates and develops scientific,
cultural and technical research and makes
it possible to serve researchers from all
continents continuously. This virtual
access leads to some major changes in
the sphere of research:
2 Preservation of content:
To preserve documents for future
generations by creating high-quality
digital copies.
3 Demand from researchers and the
general public:
To digitise the most
frequently consulted resources and
records to protect them from possible
damage and excessive handling.
4 Records that form part of
common history:
To promote the
digitisation of documental resources of
interest to other countries. For this
reason the digitisation of documenta-
tion from the General Archive of the
Indies (which houses documentation
from the Americas and the Pacific
where historical, cultural and linguistic
ties are particularly strong) has been
given priority. Digitisation of the rest
of the State Archives has begun, with
emphasis placed on common
European history (General Archive of
Simancas) and the cultural and com-
mercial environment of the
Mediterranean (Archive of the Crown
of Aragon).
5 Records media and format: To
digitise iconographic documents (e.g.
parchment, glass plate, posters, and
maps) that are difficult to handle or
particularly delicate and fragile
6 Other means of reproduction: To
take advantage of earlier alternative
On line treatment of digital image
© Minister
io de Educación,
Cultura y Depor
te de España,
© Minister
io de Educación,
Cultura y Depor
te de España,