Other terms are synonymous with document camera, including visualizer and digital presenter. How a document camera works A document camera works a bit like an overhead projector in that it projects an image onto a display screen. It can project anything printed on paper, in fact. You can use a document camera almost like a webcam, shooting photos or video and projecting them onto a screen during your presentation. Here are some key components of document cameras.
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Other terms are synonymous with document camera, including visualizer and digital presenter. How a document camera works A document camera works a bit like an overhead projector in that it projects an image onto a display screen. It can project anything printed on paper, in fact.
You can use a document camera almost like a webcam, shooting photos or video and projecting them onto a screen during your presentation. Here are some key components of document cameras. Arm: The arm connects the lens with the base of the document camera. Some document cameras have a flexible arm that makes it easy to adjust the lens quickly.
Others have a rigid vertical arm; with this type, you slide the lens up and down to reposition it. Resolution is measured in megapixels; a greater number of megapixels equals sharper images. For displaying text, a resolution of about five megapixels is an adequate number.
If you need to display photos or high-resolution graphics, a greater megapixel count works better. Document cameras may need to have driver updates installed to work with certain displays.
Lens: The document camera lens plays a crucial role in the quality of the display. A sharp lens allows you to dial in the focus, ensuring the document being displayed is easy to read on screen. Lighting: Many document cameras have LEDs near the lens that light up the document being displayed. Adequate lighting is an important part of a high-quality display. Motherboard and internal components: The document camera contains chips and a motherboard , all of which process the image signal.
These components also pass the signal to the display device. Impressively, this camera can maintain standard high definition when recording video of up to 30 frames per second. It boasts a shooting area wide enough to display large documents and a dominant digital zoom for closer analyses. As a result, your images look crisp and clear from near and far. Ports: The base of the document camera has one or more ports.
You use these ports to power the camera and to connect it to your display mechanism. Storage: You can use a document camera to create slides for a presentation ahead of time. Cameras with storage properties will contain a memory card slot or a USB storage port for a thumb drive. Some document cameras contain a flexible gooseneck design to adjust the lens.
Others slide the lens up and down a rigid arm. Document camera display options When connecting a document camera to a display option, you must make a direct, wired connection with the display device. Your device options include the following. Projector Connect your document camera to a projector , and you can display your imagery on a wall or large screen.
Just make sure your display device has an input port that matches the output port of the document camera. You will typically use a USB connection with the computer. If your document camera is connected to a computer, you should be able to switch back and forth between the document camera and the computer as the input device for your presentation.
TV screen For a medium-size room, a large screen TV works well for giving a presentation. Most of these will have rigid vertical arms, so it will take a bit longer to adjust the position of the lens relative to the document.
Be careful in this area of the market, as there are some hit-and-miss pieces of hardware available. The resolution tends to be good, and most have built-in LEDs to light up the document. These cameras usually ship with usable software and the power cords you need. Most have a flexible gooseneck-style arm that allows you to adjust the position of the lens quickly and easily. A zoom function or close-up lens attachment are also common. Many of these units are extremely small and lightweight, making them perfect for travel.
Some high-end units include the ability to store images to a memory card USB thumb drive as well. It is also compatible with video recording software that not only allows users to enjoy live video at 30 frames per second but also to save it. FAQ Q. How are document cameras better than overhead projectors? In the past, if you were giving a presentation with an overhead projector, you faced some limitations. The information had to be presented on a transparency sheet. With a document camera, however, you can display paper documents on a screen.
You also have the option of connecting to a high-resolution TV screen that can be seen even with lighting in the room. How can I create sharper images with my document camera?
If you notice a document looks blurry on the display, try moving the lens a bit farther from the surface of the document. Some document camera lenses have a focus ring. Some document cameras have a close-up lens attachment that you use when displaying small documents. Dirty lenses can also cause a blurry text display.
Can I capture and save images shot with my document camera? Can I record video with a document camera? Yes, as long as you have a video-capture type of software installed on your computer. You just have to set up the video capture software to use the document camera as the input device.
Some document cameras even ship with video capture software included. Other Products We Considered The BestReviews editorial team researches hundreds of products based on consumer reviews, brand quality, and value. We then choose a shorter list for in-depth research and testing before finalizing our top picks.
Buying guide for best document cameras
Its Sony-made sensor is no slouch either, coming from a world-renowned imaging company. The Elmo MX-P is another new addition to the market that offers users 4K resolution, and its form factor and well-placed, intuitive controls earned it a top spot. That Epson model may not attain 4K, but its HD video is bolstered by a 12x optical zoom that can combine with a 10x digital zoom to really get you close in on a variety of details. Interactivity is a popular theme these days.
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The 8 Best Document Cameras