Document Cameras, like the name suggests, is an equipment used
to capture the image of a document which is then used for displaying
on a large screen using a projector or TV display. A Visualizer
is a professional version of the document camera. Along with the
documents, one can also capture images of objects and transparencies.
Visualizers are, in some ways, derived from Overhead Projectors
(OHPs) and were designed to meet the demand for the projection
and presentation of original documents, plans, drawings and designs
rather than be limited by the need to produce OHP slides.
A Visualizer is a special live-camera system
designed for picking up any object on and outside of the working
surface with perfect illumination and depth of focus.
All types of objects (like photos, books, brochures,
transparencies, slides or 3-dimensional objects) can be picked-up
very quickly and easily. This eliminates the need of producing
OHP-transparencies or slides, because a user can display all original
The image produced by a Visualizer can be displayed
on TV-monitors or projected onto a large screen using a video
projector or data projector.
Visualizers are now used as…
An Electronic Presentation Tool ...
As an Electronic Presentation Unit they take on the role of
an Overhead Projector and a Slide Projector, but offers more
in terms of image quality and what can be shown. Apart from
35mm slides, PowerPoint Presentations, and documentary material,
they can show 3-dimensional objects in detailed close-up.
Not only does a Visualizer display just static images; movement
can also be shown while items external to the worksurface
can also be brought into a presentation.
A Scanner ...
The scanning properties of Visualizers have become more important
with the development of digital photography and advanced computer
technology. For example, the USB port of a Visualizer can
be used to transfer images to a computer for saving in JPEG,
TIF or BMP formats, allowing them to be used as a scanner
for 3-dimensional objects as well as documents. Alternatively
the 35mm slides can be captured by the Visualizer and similarly
transferred for storing on a computer. This is becoming an
important feature with the decline in the availability of
slide projectors thereby enabling users to safeguard and retain
their slide libraries.
Network Device ...
As networked installations - both local and wide area - become
more pervasive, Visualizers must be able to link into these
networks. As a result it has evolved from being a stand-alone,
local projection facility into a device for transmitting visual
information across networks by LANs. This can be done enterprise-wide,
or via the internet. This has been its role in conjunction
with videoconferencing systems, adding an important facility
to such services, with image capture, for example, being undertaken
- Show documents, 3D objects, transparencies as well as 35mm
slides on any display device viz, Projector, Plasma, TV, etc.
- Integrated with Video Conferencing
- Portable, Desktop and Ceiling recessed systems available
- Professional series available
Elmo (check with Prasad/shibu)