Buzz
This article will guide you on selecting a scanner - a peripheral device that allows you to convert text documents into computer files for work purposes. It also aids in storing important document files on your computer in image format.
Effective Strategies for Selecting the Most Efficient Scanner
In today's market, there are various types of scanners with different accompanying technical specifications. Therefore, each type of scanner will have its own characteristics suitable for different user tasks.
First: Hand-Held Scanner
This is a compact and portable handheld image scanner suitable for scanning images in both small and large areas. Although it boasts high portability, its image quality may not be optimal, so it is primarily used for barcode scanning.
Second: Sheet-fed Scanner
It's a type of scanner that requires paper to be fed in, similar to a printer. Suitable for scanning single-page documents, but not efficient for bulk documents. Its drawback is that the images it produces are only rated as average.
Third: Flatbed Scanner
This type of scanner operates similar to a photocopier. The document to be scanned is placed on the flat glass surface of the scanner, and the light moves to scan the image. This is the type of scanner that offers the sharpest image quality.
Fourth: 3D Scanner
Utilized for scanning three-dimensional objects for creating 3D models. Typically, this is the choice of manufacturers in the entertainment industry.
Fifth: Multifunctional Scanner
This multifunctional scanner combines multiple functions into one machine such as scanning images, printing, photocopying, faxing, etc. It can scan images as well as print in black and white or color. In reality, this type of machine is widely used in small office settings.
In addition to the overview of scanner types, technical specifications are also important. Below are some technical specifications for different scanner types.
About Manufacturers
Before purchasing a scanner, the issue of manufacturers is always a concern for users. However, it's difficult to provide an exact answer on which manufacturer or brand is the best choice. For example, Canon scanners are commonly used and budget-friendly, often preferred for household use. On the other hand, Epson is more suitable for those in the graphic design field. HP is the choice of the majority in office settings.
About Image Sensor
Most conventional scanners use CCD sensors. These manufacturers employ an optical lens, focusing the image onto CCD cells. This increases costs and size significantly, but CCD sensors offer the best image quality.
Small and ultra-thin scanners nowadays utilize a different CIS chip. These types of chips are typically small and inexpensive, lacking optical systems and integrating LED light sources inside the sensor. CIS sensors are larger than the width of the scanning surface and operate at very close distances to the surface.
About Automatic Document Feeder
This function helps reduce the need to manually feed each page. However, this component is often separate in low-cost scanners and integrated in multifunctional scanners.
About Resolution
It can be said that this is the most important factor determining the image quality of the product. Furthermore, the resolution of a scanner is also divided into two types: optical resolution, which is the actual resolution of the scanner, and interpolated resolution. Modern scanners typically have a resolution of 2400 dpi.
About Color Depth
This refers to the number of colors in an image that the scanner can recognize and store. However, this factor is not very important anymore because most scanners today have a fairly high color depth of 42 or 48 bits.
About Size and Scanning Speed
The maximum document size for scanning is A4 paper size (210x297 mm), which is the size of a common document page in Vietnam, and Letter size paper (216x279 mm) used by Americans.
About Communication Standard
For older generation scanners, the communication standard is usually a common interface shared with printer connections or USB 1.0 ports. Higher-end scanners use SCSI ports for faster and more stable speeds in LAN networks.
About Software
When you purchase a scanner, it comes with a CD/DVD and image processing software, optical character recognition software allows you to scan document pages to convert them from scanned images to text.
Accessories Included with the Scanner
Typically, accessories included with the scanner usually consist of an adapter, USB cable, film scanning support unit, and paper loading support unit.
Warranty Coverage for the Scanner
The standard timeframe is one year for technical defects covered by the manufacturer's warranty, while physical damages are not covered under this warranty.
Hopefully, after reading this article, choosing a scanner for your company or family will no longer be a difficult task.
