COMPUTER SCANNER  What is it? + Features ▷ 2020

The scanner are very useful tools when you need get a digital file on an image or document. In this way, with simple steps you can have the digitization of a paper in a matter of seconds.

There are different types of scanner, which differ by their design and function. If you want to know how they are classified, we invite you to continue reading this article.

But this is not the only thing we will talk about, we will also show you how it works when a document or images are scanned. In addition, we will introduce you to the best manufacturers of scanner. Don’t miss out on anything.

What is a scanner and what is it for on a computer?

What is a scanner and what is it for on a computer?

A scanner is hardware that is used as a computer peripheral to digitize, through the light, documents or images. At present you can choose so that the result is in colors or black and white.

Anyone can access the digitized files, since no special programs are needed for the computer to read this information. Its use is frequent when it is needed share paper documents with other users by means of a file in Pdf format.

To install it, a CD or a link is required to download the software that runs the scanner functions. Then, you will need to plug it into the electrical current and connect it to the computer through a port USB.

What are all the types of scanners out there and how are they different?

What are all the types of scanners out there and how are they different?

Many people when they hear the word scanner they immediately think of the one used in the office. It is true that this is one of the types that exist, but to delve into this peripheral we will show you the other models.

These are:

  • Hand: are characterized by having a small size that can be dragged around the image you want digitize. In this way, you can scan documents or any other 3D object, you only need to press the start button, cover the entire surface and keep your hand as stable as possible so that the result is optimal.
  • Flatbed scanner: this type of peripheral is the best known. It has a system in which you must deposit the sheet or image content side down and then lower one cover to avoid visual disturbances due to strong light. Its size can include sheets, legal or letter.
  • Rotary: this is used type of scanner for professional jobs that are aimed at graphic design. They are characterized by having a size much larger than previous models and graphic resolution of the digitized results is of high quality.

How do scanners work to digitize documents and images?

If you want to know how scanners work to digitize images or documents, continue reading. We show you below:

Image scanning

When scan an image, the peripheral send to computer via a wired connection an image in RGB, which can be edited by other photo manipulation programs, such as the Photoshop.

The scanner applies a certain algorithm and resolves color depth by means of a reader scanned to provide a larger to smaller 24-bit image. This will lead to classification in small or large images.

Then, is sent to a predetermined file on the computer so that the user can work with the image digitized. The transfer rate can reach, in the most modern equipment, up to 60 megapixels for every second, so the process of obtaining results is practically fast.

Document scanning

For scan a document you can do it with any scanner common, since the resolution of the files is between 150 to 300 pixels per inch. They are generally done in black and white, but this does not imply that they cannot be done in color.

Average speed is up to 60 pages every 60 seconds, having the possibility of scanning each sheet in double-sided. Technology is used OCR so they can be editable in format Tiff, but they can also be in JPEG, PDF and PNG.

This way, when reflects light on the document transforms it into electrical signals so that the paper is registered in the file.

How does a scanner work? Main elements of the process

How does a scanner work?  Main elements of the process

The main elements that you can find in a scanner are:

Connection with computer

The connection with the computer is made by means of a cable, which is connected through a USB port. In this way, the information digitized travels on this cable and reaches transfer speeds higher than 25 megapixels per second.

So when I know they scan documents is achieved scan up to 60 sheets in one minute. Whereas, for the images it will depend on the quality of the scanner, but the time I work is short.

Data collected

To capture the original image a light source is emitted. This can be of type fluorescent or halogen, but can also be found from xenon. Through the mirrors, which are positioned at 45 degrees, transmits through a glass the information so that the image is captured in an element called Original opaque. In this way, the filters are made RGB or CMAN to transform details that were not sharp enough.

According to the resolution that the device has, which is measured by dots per inch, and the depth that it has having the highest amount of bits this information is saved on the computer in a folder preset by the scanner program.

Scan quality

Scan quality is measured in pixels per inch, which determines the resolution of the scanner. This has a direct influence on the size of the document that will be saved in the folder on your computer. Within the standard peripherals you can find resolutions from 1800 dpi until 4800 dpi, but the scanner more sophisticated that number can reach up to 160 thousand dpi.

Another factor that influences the quality of the images is the bits. Which means the capacity that the scanner to capture as many colors as possible.

List of the best scanner manufacturers on the market that you should know

We will present the best hardware manufacturers to digitize images and documents below:


These scanner They are characterized by having a high speed in digitization and also in the performance of the results of images and documents. In this way, the quality of the work generates a high level of acceptance and trust among users. Are compatible with digital cameras, both professional and domestic.

In addition, they have functions that allow the wireless connectivity, either with portable, handheld or flatbed scanners. If you are looking for a robust peripheral, you can safely choose the document scanner, since they are ideal for intensive uses. Also, if you want a professional use with port USB, you can find a wide variety of models that fit these needs.


This company makes the difference in devices to digitize documents and images. It has a long history around the world and the quality of the image results is actually very good. They are suitable for domestic and professional jobs, since they have a wide variety of models.

You can find portable, flat bed and handheld scanners for 3D objects. Their prices are quite competitive, since you can have a product of excellent quality at an affordable cost.

Among the most outstanding characteristics that this company has, is its line of models ScanSnap. Which combines different features with smartphones and a scanner, allowing you to have a very useful tool that can be carried everywhere.


It is one of the market leaders, since its variety of models adapts to the different demands of users. You can find peripherals for home, office and professional use, where the quality of the colors stands out greatly.

If you need to have a scanner that can process more than 80 pages per minute, the model line of this supplier is ideal for you. Also, if you need retrieve documents You can count on different tools that will help you with this task quickly and easily.

It presents its Perfect Page function, with which you will be able to automatically perform an orientation of the sheet, as well as improve brightness and sharpness. In addition, you can perform a edge smoothing to favor the background color, eliminating lines and cutting out all those imperfections that harm the final result.

If you have any questions, leave them in the comments, we will answer you as soon as possible, and it will surely be of great help to more members of the community. Thank you! 😉

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