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Visualizers and Document Cameras

Common man’s definition –
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.

Intro –
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 objects.

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.

Trend –

Visualizers are now used as…

  1. 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.
  2. 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.
  3. 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 remotely.

Options/USPs –

  • 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

Catalogs –

Elmo (check with Prasad/shibu)
Wolfvision



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