Technology

Imagine we need to send our mark sheets to a particular company wherever we have applied for the job and that company is asking to mail those documents. But we have the mark sheets of paper which obviously we cannot send them by mail. But all we can do is to get them scanned by a Scanner, then save it as a file on the computer and finally attach them while mailing it to the company. So we see that how useful scanners have become.

Computer scanner is a special electronic input device which is used to scan the pictures, text, various objects and converts into digital image. Initially we suffered a lot of problems when scanners were not made but technology is always at its best providing something or the other; daily fulfilling our desires and enhancing our pleasure.

One thing to keep in mind is that scanners do the same work just like our photocopy machine. The only difference we see is that photocopy machine gives out complete copy on the papers but in scanners any image gets stored in the computer’s memory in the form of a file and further can be saved on a hard disk and hence can be easily sent to other people by mail, or you can even write onto your CD or DVD or in pen drives. The scanners actually scan the picture or an object and thus convert it into digital image in the form of ASCII code which is only readable by the processor of the computer and thus gets stored in a file.

There are various kinds of scanners available such as Sheetfed Scanner in which the paper to be scanned moves but the scanning head is fixed. Flatbed Scanner is the one in which paper is placed on the flat surface but the scanning head moves to scan the image. This is a very common and affordable scanner. Another we have is the Handheld Scanner which as the name suggests taken in hand to scan the items or objects or information on the paper. It can be used for fast scanning the text or picture but it gives low quality images.

Other scanner is the Drum Scanner to produce high quality images and which is mostly used in the publishing industry. Here paper to be scanned is placed on a glass cylinder inside which there is a sensor which splits the light into 3 colors and with the help of photomultiplier tube changes the light into electrical signals.

Hence we see that scanners are important for us as they are used by people for their personal and professional life by making our life more fast, efficient, and successful and making us more technical.