Computer Accessories PC

1. A scanning device or a flatbed scanner?  There are several types of scanners, the main being the flatbed, built around a window in A4. To scan only a few passages of text, even a sheetfed scanner pen can suffice, but only to scan a large collection of slides, several models of film scanners exist. The most general format is that of the flatbed scanner, which is suitable for all uses even such as a useful computer accessory.

2. A CCD sensor is better than IRC – There are two types of sensors for scanners, which are included among computer accessories. CIS sensor that is used for entry-level scanners (it costs less and can make products less bulky, self-powered) and the CCD, which it offers better optical quality. It is the latter that we find most on the market.

3. The higher the optical resolution scanner, the greater the result : If a resolution of 600 dots per inch (DPI) is more than enough for most uses, it must also be aware that the bigger, the better you can correctly scan photos, slides or large documents. At 4800 DPI, you are sure of your shot. Caution, do not be fooled by an impressive figure. The manufacturer has been able to put forward an interpolated resolution which corresponds to an improvement in virtual software. Only the optical resolution is valid.

4. Check the sampling rate of the scanner
This measure expressed in bits color depth described a scanner is capable of achieving. The higher the number, the more nuances are numerous and the better the return of a document. A good scanner has a sampling rate of 24 bits at a minimum.

5. The scanner interface is also very important
Completed scanners on parallel port or SCSI. Henceforth, we refer to USB 2.0 or FireWire only. The velocities of these interfaces can quickly scan large documents such as photos A4. Still prefer a USB 2.0, you are sure you can plug into your PC.

6. The speed of scanning is not a true test of choice
Do not trust a model of advertising time of about one minute for text and two minutes for a photo A4. These times “builders” are minimized compared to reality and, in fact, you may wait a while. Then choose a model whose performance announcements are 30 seconds, you’ll maybe just wait a minute.

7. A back-to transparent to scan slides and negatives :The light illuminating the back window “backwards” can scan slides and photographic films 24×36. Without this accessory, you can scan documents as classics such as magazine pages for example.

8. Number of records
Check the number of documents that accepts adapter for slides and films. Some are much smaller than others. The good compromise: an adapter that can accommodate four slides and six poses 24×36.

9. You want to scan many documents? Choose a model with a document feeder.  With it, you easily digitize a series of photographs 10×15: they will be “swallowed” by a by the scanner.  On some high-end models, even professionals, this charger can accept documents in A4 format.

10. Beware of drivers included within the scanner.  They must conform to the way Twain is used by Windows. If so, you can use your scanner as acquisition device through any image editing software for example. In the absence of Twain driver, you must go through the software supplied with the scanner to scan a document or image.

Watch tweets on: