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  • Shanghai Eastimage Equipment Co., Ltd
  • Address : NO.111, Zhiye Road, Pudong New District, Shanghai, P.R.China
  • Phone : +86-21-33909331
  • Email : sales@eastimage.com.cn

A Buyer's Guide to Flatbed Scanners

Flatbed Scanners can be used to scan text for OCR and document archiving; and they can be used to scan material of varying sizes and thicknesses -- from small postage stamps to large mechanical blueprints and 3D objects. To determine the flatbed scanner for your needs, this buying guide covers some of the more important flatbed scanner specifications that you will need to know.
 
Bit depth and color pass
 
Practically all scanners today are single-pass types with 48-bit color. Gone are the scanners of yore that required three passes to capture the full RGB (red, green, blue) color information from an image in individual, painstakingly slow takes. Gone too are 24-bit and 36-bit scanners that proved sufficient in the past for delivering up to 68.7 billions of color.
 
Today's single-pass, 48-bit scanners are fast and can theoretically capture up to 250 trillion colors -- clearly more color than the human eye can distinguish or what monitors and printers can reproduce -- but impressive nonetheless for the promise of yielding hues as close to life as possible and delivering smoother color gradations. Ignore all but single-pass scanners when shopping for a flatbed, and aim for 48-bit color as well. Consider lower-bit models (such as 42-bits) only if your scanner of choice has other specs that a higher-bit counterpart may not have -- such as patented technologies and special features -- that more than compensate for the lower bit depth of your selected model.
 


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