Scanners, Computer Engineering

Assignment Help:

A Scanner is a device which allows you to capture photographs or drawings or text from tangible sources (paper or slides etc.) in electronic form. Scanners work by detecting differences in brightness of reflections from an object or image employing light sensors. These light sensors are organised in an array across whole width that is scannable. This packing concludes the resolution and details which can be scanned. 

Scanners come in several types:  Drum Scanners, Flatbed Scanners, Hand Scanners and Video Scanners. Drum Scanners employs a rotating drum to scan loose paper sheets. Flatbed scanners have movable sensors to scan images situated on a flat glass tray.

These are the most costly kind of scanners.  Hand held Scanners are cheapest and most portable.  

They are convenient for many applications however are small in size and require good hand control for high quality scanning.  Video Scanners employ Video technology and Video cameras in place of Scanning technology.  Possibly they can give high resolutions, scanners in economical range give poor resolutions.

1973_SCANNERS.png

Figure: Scanners


Related Discussions:- Scanners

Mac address helps in which access control, MAC address helps in (A)  m...

MAC address helps in (A)  multimedia access control. (B)  media access control. (C)  mobile access control. (D) master access point control Ans: MAC addr

Constant voltage sources, Constant Voltage Sources An ideal constant v...

Constant Voltage Sources An ideal constant voltage source maintains a given voltage across its load regardless of the current drawn from it .Most 'every-day' power supplies a

What is meant by inter process communication, What is meant by inter proces...

What is meant by inter process communication? Inter process Communication: The OS give the means for cooperating processes to communicate with each other through an inter pro

Illustrate simple ALU organisation, Q. Illustrate Simple ALU Organisation? ...

Q. Illustrate Simple ALU Organisation? An ALU comprises circuits which perform data processing micro-operations. Though how are these ALU circuits used in conjunction of other

Explain the storage class static, Explain the Storage Class Static Th...

Explain the Storage Class Static The Storage Class Static : Static declarations have two important and distinct uses. The more elementary use is to allow a local variable to

System engineering hierarcy, develop system engineering hirarcy for public ...

develop system engineering hirarcy for public health care?

How to reduce the maximum quantization error, In successive-approximation A...

In successive-approximation A/D converter, offset voltage equal to 1/2 LSB is added to the D/A converter's output. This is done to ? Ans. It is done to reduce the maximum quantiz

display the contents of the file grade, a) Input names of students from th...

a) Input names of students from the user, terminated by "ZZZ", 0, 0, 0 and create a data file grades with records of the following form: Student (string), test1 (integer), test2 (i

What do you mean by drive cache, Q. What do you mean by Drive Cache? Di...

Q. What do you mean by Drive Cache? Disk cache may be a part of RAM sometimes known as soft disk cache which is used to speed up access time on a disk. In latest technologies s

Write a c++ program to explain three specific classes, Make a base class ca...

Make a base class called figure that store the dimensions of several geometrical objects and compute their areas. Explain a function set_dim( ),a standard member  function and show

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd