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A guide for flatbed scanner

Flatbed scanners generally deliver the best combination of quality, flexibility and ease of scanning. You can scan to be different types of media, including photos and film (with the addition of a transparency adapter), it can be used to text OCR to scan and archive documents and they can be used to scan in different sizes and thicknesses - from small postage stamps to large mechanical Designs and 3D objects. To determine the flat-bed scanner for your needs cover these Buying some of the important Flatbed Scanner specifications you know need.

Bit depth and color pass

Virtually all scanners today are single-pass types with 48-bit color. Gone are the scanners of the past, the three passes to the full RGB (red, green, blue) color Reading information from an image required in single takes a long time. Gone too are 24-bit and 36-bit scanner, the sufficient in the past proven to provide up to 68.7 billion colors.

The current single-pass, are 48-bit scanner quickly and can theoretically capture can be distinguished more paint than the human eye or reproduce what monitors and printers - - up to 250 trillion colors, but still impressive for the promise of yielding shades as close to life as possible and delivers smoother color gradations. Ignore all but single-pass scanner when shopping for a flatbed, and strives the 48-bit color. Consider low-bit models (such as 42-bit) only if your scanner of choice of other details that require higher bit counterpart may not have added - as patented technologies and special features - more than compensate for the lower bit depth of your chosen model.

Resolution

The resolution a scanner determines the level of detail that can be captured, the higher the resolution, the sharper the scan are. There are two types of resolution: optical and interpolated, optical resolution is a more important spec, as it relates to the scanner optics and the actual amount of information that sample. The interpolated Resolution of a scanner is useful only in certain applications - such as scanning of Art, where a higher resolution can even jaggedness and produce smoother contours.

Most of the loading areas now feature respectable specifications for optical resolution of 2400 dpi dpi 4800th Each scanner with such a resolution figures would a respectable choice prove, as these specifications are more suitable for the transport of sharp details or enlarging images for most print applications. Also, remember that the scanning of your pictures in the full resolution of the scanner is probably unmanageable proportions yield file sizes - without Super discernible benefit to increase the image quality or quality. So forget the resolution wars of the past, when manufacturers trot their resolution specs outdo their closest rivals. Instead, look for other features today in loading areas, which may be important for your needs, or consider the Resolution spec together with these other functions when selecting your choice of platform.

CIS vs CCD Sensor Technology

Image sensors in flatbed CCD or CIS - Scanner, two types of. Scanner with CCD (Charge-Coupled Device) sensors use a system of mirrors and lenses for redirecting light reflected from the original document in the CCD array. Because of the required optics, CCD scanners are more expensive to manufacture and result in bulky scanner, compared to their counterparts CIS. The image quality produced of CCD scanners, but far superior, is produced by the CIS scanners.

Or CIS Contact Image Sensor technology is a recent development in which the sensor array is just below the scanner bed, so that the sensors catch reflected light directly. Since CIS scanners do not need a complex optical system, they are cheaper to produce and are smaller, what portable, lightweight models that may prove ideal for cramped desktops. CIS sensors also include on-board logic that consumes less power than CCD. But because the on-board logic uses space that would normally be used for the mirrors and lenses to a CCD sense light from a CIS scanner scans are low quality. As a result, most tend People on the easy savings that can be obtained from a CIS scanner without the benefit of getting higher-quality CCD models instead.

Connectivity & Interface

Most consumer-level scanners now feature USB ports - either Hi-Speed USB (USB 2.0) to newer models or the older USB 1.1 standard. Hi-Speed USB is backward compatible with USB 1.1 and has a data transfer rate of 480 megabits per second (Mbps). High-end scanner models are suitable for the FireWire interface include as well, so that scanners are used in advanced, professional, such as audio / video transmission and storage. Scanner with a USB or FireWire port are hot-swap - which means the scanner are plugged or unplugged from other devices on it without the scanner off and then reconnected. Older scanners are SCSI or parallel ports, but you should not in this kind of legacy models look - unless you use the scanner to connect to older computers. When shopping for a flatbed scanner, each scanner a Hi-Speed USB interface are buying worthily should consider, but you are a model with dual Hi-Speed USB and FireWire ports to your range of possible connections to extend many other devices and peripherals.

Scan speed

Speed specifications in loading areas are difficult to determine - unless the scanner manufacturer offers product information or the exact conditions in which material is scanned. The scanning speed can run from seconds to several minutes, depending from a variety of factors. For example, to compare, scan speed between two similar models, one must be scanned, you know the size of the material, the resolution, the interface used, and the processing speed and power of the computer where the scanner is connected. Check the speed claims carefully if they are ever made, it can help do a real test or scan with the model of your choice and see if you are with the speeds preview content and the actual scans. You can also check that has your flatbed model reviewed in computer magazines or websites, and valued for speed, as benchmark tests give a more complete picture of can, as fast running the scanner.

Size of Scan Bed

Most of the loading areas today begins with a standard scan bed size of 8.5 "x 11.7", the approximation of the dimensions of a letter-size picture or Document. From there, various bed-size configurations could come into play, including 8.5 "x 14" to accommodate legal size material, and 12 "x 17 "for large, tabloid-format scanning is usually a good idea to consider with a bed size of the minimum of the platform -. In this Be greater than the barebones 8.5 "x 11.7". Not only can you fit larger size material on the scanning bed, you can also buy several smaller Pieces on the scan bed and batch scanning (scan in groups) to save time and effort.

Dynamic Range

The dynamic range of a scanner measures, such as well it should recognize the tonal range of an image, ranging from the lightest to darkest shadow highlights. Dynamic range is measured on a scale of 0.0 (perfect white) (Perfect black) to 4.0, and the only number shown connected to a scanner, how much of this area can be kept apart. The minimum and maximum density values obtained by can be detected scanner are called Dmin and Dmax, respectively. If a scanner Dmin was 0.2 and was 3.0 Dmax, then its momentum would be 2.8.

While Dynamic range is a term often bandied about, in fact, the specification is important for film scanner for slides, negatives and slides scan - as these types of media a wider have range of tones compared to photos, and a scanner for the higher dynamic range can make a difference. Most flatbed scanners, a dynamic range of 2.8 to 3.0, but do not be surprised if you can not find it in the product information because it does not look critical information with the average user, to scan photos or prints required.

Software

In selecting the scanner of your choice, consider the software that comes with it. Software is also the scanner driver and scanning software, and a variety of complementary programs such as image editing software like Adobe Photoshop, to which the scanned image is delivered, optical Character recognition software such as ABBYY FineReader Sprint for OCR scanning and text, color calibration software for high-end scanner models and photo repair software, such as DIGITAL ICE. Check Tools for you as well as proprietary and exclusive technologies. For example, some Microtek dual-bed scanner (a flatbed for scanning photos, your own bed scanning film) is a technology called EDIT, the glass-free transparency scanning artifacts such as Newton's rings to eliminate and improve the image quality features.

The driver or Scan software is a critical component of the flatbed as it see how easy and efficient you can do your scans. Good scanning software provides quick preview, automatic settings if you just want a lot of operations and image adjustment or extension functions to scale images up or down in size to calculate input vs. baseline dimensions, correct brightness and contrast histograms, apply filters and more. Microtek ScanWizard scanning software, for example, offers a standard interface for simplified and automated scanning, as well as an advanced interface for more detailed and sophisticated control of the entire scanning process. Make sure find out what scanner driver and software bundle included with the scanner before completing your purchase.

Accessories

Open body position, their function and to extend versatility, when equipped with accessories such as transparency adapter or automatic document feeder.

The transparency adapter - also known as transparent Templates to be known - allows you to scan film and slides in addition to the photos that can be scanned on your flatbed. TMAs are easy with the lid of the flatbed scanner completely removed and the TMA installed in its place. With their own ceiling light, the activated TMA is able to shine the amount of lighting it will be scanned on the film control that overexposure of the film and produce correct results. Usually included with the purchase of a transparency adapter are any number of film holders or templates in different ways of film, scan, such as 35mm slides, 35mm filmstrips, 4 "x5" film and medium format (6x6 cm to 6x17 cm panoramic) film. Premium color targets for the calibration of the scanner, for optimum film scans will also be a part of the package.

The automatic document feeder or ADF increases, document imaging power of your flatbed scanner. ADFs allow continuous scanning of multipage documents - anywhere from 50 to 100 or even more pages - for imaging or OCR. With an ADF attached to a scanner, can you just a bundle of documents in the ADF, run the OCR software for your scanner and select the appropriate settings for scanning Pages of text. The pages can then be produced as either graphic or image files for reference and record keeping requirements, or the pages of OCR and text editors be saved.

When deciding on the flatbed scanner of your choice, whether to adjust a transparency unit, automatic document feeder, or both. The additional options can cost a bit more, but the money is spent be worth it if this accessory you can do so much more with your flatbed scanner To do to increase your efficiency and extending the reach of the scanner functions.

Other Components

A final element in your flatbed scanner Department will check your service and warranty options. Depending on the price and amount of your scanner model, service and warranty options for a free limited time, with extended warranty options available if you feel you need extra protection and security. Most manufacturers offer some form of service and warranty conditions Check to see whether they are reasonable and match your needs. The best warranty covers parts and labor, and a comprehensive guarantee for a shorter term, you can better serve as a longer-lasting, but watered down guarantee. It can be a good idea to check what kind of technical support can also use your flatbed scanner to buy, and whether online support, downloadable drivers and update information can be obtained from the manufacturer's website.

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