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Wednesday, December 12, 2007

Drum Scanners - What Are They? By Jesse Miller

Drum scanner are designed to capture all aspects of your original piece. It also provides a wide scanning areas. Drum scanners are the oldest scanning technology, have a scanning photo multiplier tube, which moves back and forth.

Drums

Drum scanners seem to always outshine most flat-bed scanners. They spin your film around the drum while a laser or beam of light scans the art as it spins. These are good, but not because of the drum, but because the image is picked up by a much more sensitive PMT. It capture more information so it convers a photo into a digital file more accurate. The scanners continue to be mostly used in high quality areas, such as museum archiving of photographs and print production of books and magazine.

They were the first scanners technology developed, and still dominate the high-end printing business. They are hard to operate so it is usually done so by technicians. The item are placed on a glass cylinder and by rotating this cylinder at high speeds around the sensor they can produce a high quality copy. The Scanners can produce scans superior to those of flatbed scanners in resolution, color and brightness.

Software

Most drum scanner software are designed to coordinate several tasks. Scanning software for drum scanners tends to allow more correction and enhancement. As far as quality is concerned a drum scanners produces the best scans. Drum scanners provide the highest quality for converting images from film or prints, but they are very expensive. They do what is called Wet mounting,this process in drum scanners conceal scratches and dust on original prints. One of the best features of drum scanners is the ability to control sample area.

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Article Source: http://EzineArticles.com/?expert=Jesse_Miller

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