Document camera Wikipedia. Document cameras, also known as visual presenters, visualisers in the United Kingdom, digital overheads, or docucams, are real time image capture devices for displaying an object to a large audience. Like an opaque projector, a document camera is able to magnify and project the images of actual, three dimensional objects, as well as transparencies. They are, in essence, high resolutionweb cams, mounted on arms so as to facilitate their placement over a page. This allows a teacher, lecturer or presenter to write on a sheet of paper or to display a two or three dimensional object while the audience watches. Theoretically, all objects can be displayed by a document camera. I recently moved and found the perfect room for my firstgeneration Bose 901 speakers. In my previous place, they were hooked up but not really. After a combined 40 hours of researching and testing surroundsound speaker systems, the Pioneer SPPK22BS was determined to be the best for most people. The Audioengine A5 is a versatile multimedia speaker system compatible with any computer, iPod, iPhone, or iPad, its 5way speaker binding posts, improved thermal. Most objects are simply placed under the camera. The camera takes the picture which in turn produces a live picture using a projector or monitor. Different types of document cameravisualizer allow great flexibility in terms of placement of objects. Larger objects, for example, can simply be placed in front of the camera and the camera rotated as necessary,or a ceiling mounted document camera can also be used to allow a larger working area to be used. Typical applications for a document camera include Document cameras replaced epidiascopes and overhead projectors, which were formerly used for this purpose. By means of the zoom feature a document camera can enlarge the small print in books and project a printed page as if it were a traditional transparency. Also the room lighting does not have to be darkened to operate a document camera in a classroom setting this is an asset. Most document cameras can also send a video signal to a computer via USB cable. Ceiling Speaker Placement Software UpdateSometimes document cameras are connected to an interactive whiteboard instead of a standard screen. Some document cameras can be supplied with an accessory so that they can be used with a microscope. As of 2. HD 1. 28. Portable Ms Office 2007 Torrent Download. HD 1. 92. 0x. 10. Historyedit. Video Lupe 1. Wolf Audio Visuals document camera prototype model. Speaker_SetUp_Wmeasurments.jpg' alt='Ceiling Speaker Placement Software' title='Ceiling Speaker Placement Software' />Video Loop Wolf Audio Visuals AV installation c. Document cameras were developed to meet an increased demand for the ability to project and present original documents, plans, drawings and objects directly, rather than necessitating the prior preparation, that would be required for their use as part of an overhead projector based presentation. The first Visualizerdocument camera were developed by the companies Wolf. Vision and Elmo and were launched at the photokina Trade Fair in 1. The widespread use of computers, projectors, and popular presentation programs such as Microsoft Powerpoint in meeting rooms, meant that overhead projectors became less frequently used. Document cameras continue to provide a convenient and flexible way of allowing documents, books or slides to be spontaneously displayed during presentations as required. Ceiling Speaker Placement Software ReviewsActive Crossovers for DIY Speaker Builders. Written and maintained by John Pomann updated 62302. My stable homepage is as of 122501 httpwww. Hi, Well the kid is off in college so Ive got another possible room to take back. Right now I have my Vandersteen 2cs in my open office. The office. The first attempts and prototypes were mostly simple video cameras on a copy stand. During the mid 1. The technology of video cameras during this time, was a key factor in the development of document camera systems. Document cameras have also frequently benefited from developments in other industries, which also facilitated significant advances in the field of document camera technology. A good example of this is the technology used in photographic equipment, which has contributed much to the development of the document camera as a high quality presentation tool. At the end of the 1. Many visualizers available on the market today are capable of at least 3. TechnologyeditThe design and specification of a document camera are a combination of several different technologies. The quality of the recorded image is dependent on the primary components, which are optics, camera, lighting system and motherboard with appropriate firmware software. The finished product is then realised by the production of different mechanical designs by individual manufacturers. Today High Definition Document cameras are available with HDMI output, AudioVideo recording and playback is possible, and some High Definition document cameras are also using high speed WIFI technology to eliminate the need for cables. Optics are one of the most critical components relating to image quality, and the quality of the optical system used will largely depend on the planned cost of the device. Simple or highly complex optical systems can be used, which can differ significantly in both quality and size. The iris or aperture is another important component of the optics. The iris controls and regulates the amount of light that passes through the lens onto the image sensor. A lens will focus on exactly one point of an object to be imaged onto the sensor. However, there is also an area in front of and behind the point of focus that will be perceived as being in sharp focus by the human eye. This is called the depth of field, and it is dependent upon the size of the iris or aperture. Progressive scan cameras use either CCD sensors or CMOS sensors. The general advantage of progressive scanning over the interlaced method is the much higher resolution that is the result. A progressive scan camera captures all scan lines at the same time, whereas an interlaced camera uses alternating sets of lines. Basically, image sensors provide only monochrome images. With a 1 chip camera, colour information can be easily obtained through the use of colour filters over each pixel. With 1 chip cameras, the so called Bayer filter is very common. Red, green and blue filters are arranged in a pattern. The number of green pixels is twice as large as that of the blue and red, thus the higher sensitivity and resolution of the human eye is replicated. To get a colour image, different algorithms are then used to interpolate the missing colour information. A 3. CCD camera module is another way to produce colour images. A prism is used to split white light into its red, green and blue components and a separate sensor is then used for each colour. This complex camera technology is used in 3 chip cameras and allows for excellent colour reproduction at very high resolutions. Modern camera systems used in a document camera are able to provide high resolution colour images at 3. In a 3 chip camera, the measured resolution may be up to 1. In addition the image can be adapted to fit common display aspect ratios of 4 3, 1. Lighting systemeditLighting is an essential part of a document camera. To ensure good colour rendition, the lighting system used to illuminate the image capture area should be as uniform as possible. The greater the light intensity, the more independent the document camera is from ambient light sources. Using powerful lighting systems enables smaller apertures to be used, and this in turn provides a significant increase in the depth of field that can be achieved by the document camera. Also the higher the quality of the light source, the more light that will reach the camera sensor, and this results in less noticeable noise, and therefore the quality of image is not degraded. Some document camera models integrate additional functionality into the light system, such as a synchronized light field that clearly indicates to the user at all times, by way of an illuminated image capture area or laser markers, the size and position of the imaging area, which adjusts simultaneously as the lens zooms in or out.