Document camera auto focusing (AF)
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Autofocus is a common document camera function. Pressing a button automatically focuses the subject material under the document camera, which means that the presenter does not have to continuously bring the image into focus. Most document camera systems will keep auto focusing continuously while the document camera is in use.
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Document camera auto iris
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Document camera auto iris is a function that happens automatically to control the amount of light that the document camera picks up from the image it is viewing. This is a useful feature when presenting in overly dark or overly light environments.
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Color to black and white document camera picture selection
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This document camera function converts a color picture to a black and white one, which can help to remove picture "noise" which can sometimes occur in color pictures. Viewing the document camera’s image in black and white makes the image more stable, making it easier to tell the difference between light and dark colors.
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Digital document camera magnification
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Digital document camera magnification allows magnification in addition to that which is provided by the document camera’s optical magnification capabilities. Some document camera models are capable of digitally magnifying images up to 300 times.
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Document camera drawing function
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Drawing functions allow presenters to annotate or draw directly over the image that is being produced by the document camera using "electronic ink". There are a variety of different colors available to add emphasis to document camera presentations.
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Edge enhancement of document camera images
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On certain images produced by the document camera, such as black text on a white background, a "halo" effect can sometimes be seen. Enhancing the edges of the document camera’s image helps to stop this from occurring.
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External Image Saving
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Document cameras have internal memory for storing images, and external image saving allows presenters to transfer additional images from their document camera to a computer using a USB cord. Alternatively an SD card can be used to boost memory space.
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Document camera freeze or pause mode
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Freeze mode, or pause mode as it is also known, enables the presenter to pause the image that the document camera is displaying on the screen, which means that the presenter can then replace the subject matter to be displayed without disrupting the flow of the digital presentation.
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Document camera gamma correction
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The images produced by a document camera can be optimized by either coding or decoding the luminance of the video signal.
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Document camera image mode
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Document camera image modes are actually a collection of algorithms used to enhance the document camera’s image depending on the type of subject material that the document camera is viewing. For example, one document camera mode could be used to reduce the "halo" effect created by high contrast images.
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Internal document camera image saving
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Most document camera models have built in memory which can be used to save images captured from the document camera for easy retrieval at a later date. The actual amount of memory available varies from anywhere from 3 to 80 images and will depend on the model of document camera in question.
Document camera keypad lock
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A document camera’s keypad lock feature allows the user to lock the keypad to prevent an undesired pushing of the document camera’s buttons. This function is usually selected using a combination of button presses.
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Negative/positive document camera image conversion
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This document camera function allows the image produced by the document camera to be converted from a color or black and white positive image to a negative image and vice versa.
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Control of the projector by the document camera
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Certain projector functions can be controlled by the document camera itself. This type of document camera functionality will usually require using RS-232 or USB connectivity.
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Rotation of the document camera’s image
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This is a digital function in which the subject being viewed can be digitally turned 90 degrees at a time without physically
moving the subject material.
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Document camera screen split
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Splitting the document camera image into two screens is a very useful function if you need to compare two images. The screen is split in half either horizontally or vertically. For example a live image from the document camera can be displayed next to an image stored in the document camera’s memory.
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Signal Pass-through
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If you are using a computer with your display device, you can pass the signal from your computer through the document camera and show images from your computer on your display device, even when your document camera is switched off.
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Slide show of document camera images
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The document camera slide show function shows sequential images either stored internally on the document camera or on an external memory source.
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Split document camera display (slideshow)
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This document camera feature relates to either the document camera’s internal memory or an external memory source. Using this feature you can display a number of thumbnail images that have been saved previously. The actual number of images available for display varies between document camera models, although it is usually between four and sixteen images.
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Document camera state presetting
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Document camera state presetting enables the presenter to select pre-saved settings on their document camera to be used for a particular function, for example viewing documents or 3D objects. There are a variety of different settings which can be memorized, including color balance, white balance, black and white selection, positive/negative images, zoom, image rotation, brightness, lighting, edge enhancement and gamma settings.
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Document camera white balancing
The document camera white balancing function manipulates the color temperature seen by the camera to enable to document camera to display the right color image on your display device.
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