Projectors
A projector is a machine that shines a reflection of an image or text onto the surface in front of it. Transparency projectors work by shining light through a semi-transparent material, such as slides or film. Digital projectors, by contrast, project a digital image directly from a computer through a lens on to a screen. There are four technologies which may be used in digital projectors. The future for digital projectors is exciting, with new technologies constantly being developed. As more and more theatres switch to digital projection, consumers cannot help but reap the benefits. As these technologies become more affordable they will inevitably find their way into home systems and allow each of us to experience the joy of a full theatre projection in our own home.
Commonly projectors are:
An LCD projector is a type of video projector for displaying video, images or computer data on a screen or other flat surface. It is a modern equivalent of the slide projector or overhead projector. To display images, LCD (liquid-crystal display) projectors typically send light from a metal-halide lamp through a prism or series of dichroic filters that separates light to three polysilicon panels – one each for the red, green and blue components of the video signal. Digital projectors are the modern replacement to more traditional transparency projectors.
A slide projector is an opto-mechanical device to view photographic slides. Slide projectors were common in the 1950s to the 1970s as a form of entertainment; family members and friends would gather to view slide shows. In-home photographic slides and slide projectors have largely been replaced by low cost paper prints, digital cameras, DVD media, video display monitors, and video projectors.
Movie projector
A movie projector is an opto-mechanical device for displaying moving pictures by projecting them on a projection screen. Most of the optical and mechanical elements, except for the illumination and sound devices, are present in movie cameras.
An image projector is an optical device that projects an image (or moving images) onto a surface, commonly a projection screen.
Most projectors creates an image by shining a light through a small transparent image, but some newer types of projectors can project the image directly, by using lasers. A virtual retinal display, or retinal projector, is a projector that projects an image directly on the retina instead of using an external projection screen.
An overhead projector is a variant of slide projector that is used to display images to an audience.
Visualizer
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Visualizer is the most flexible presentation tool of our times. It can pick-up any kind of material (books, photos, 3-dimensional objects etc.) quickly and easily and provides a high resolution output signal for video/data projectors, monitors, interactive whiteboards or videoconferencing systems. A number of studies have shown that presentations made with a Visualizer dramatically increase learning success, as information which is presented visually is much easier to remember, and is retained for far longer than information presented using the spoken word alone.A Visualizer enables a presenter to translate ideas into convincing interactive presentations, spontaneously and naturally, and to engage and communicate with an audience in a manner that is more effective than any other presentation method, ensuring that each and every
presentation is a memorable experience for the audience.
Visualizer is a largely redundant name for a Storyboard artist or Concept Artist and is a mainly freelance occupation found in Advertising agencies to assist Art directors in drawing scamps and storyboards to a standard that they themselves could not manage for presentation to clients. Their work is used most often in a pitch scenario where the drawing has to be to a high standard in order to win the business, and their work is routinely passed off as having been done by the Art director when presented to clients. They are now increasingly moving away from ink and incorporating digital media in to their work.
Compared to rather "stiff" PowerPoint presentations, Visualizer presentations are much more flexible and dynamic, because anything can be displayed at any time, with no fixed order and without the need for lengthy preparation in advance.
Typical applications for
Visualizers are: Training, Education, Meetings, Conferences, Product Presentations, Court Rooms (displaying evidence), various Medical Applications (telemedicine, telepathology, x-rays etc.), Video Conferencing / Tele Presence (using the Visualizer as a document camera) and many more...
Furthermore, objects presented live with a Visualizer capture the attention far more readily than the simple display of scanned objects (eg. via PowerPoint), because of the 'live' factor. The fact that the audience sees the presenter's hands, annotations, zooming action, twisting around of objects and other movement in the picture, personalises the delivery, and everybody present feels like they are an integrated part of the presentation. Imagine the difference between just looking at a photograph, or being able to watch a movie.
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