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

What is event-based simulator, Event-based Simulator Digital  Logic  S...

Event-based Simulator Digital  Logic  Simulation  method  sacrifices  performance  for  rich  functionality:  each active signal  is  calculated  for  every  device  it  propa

Illustrate about object oriented development, Illustrate about object orien...

Illustrate about object oriented development object oriented development is not direct way of system development as in this approach a holistic view of application domain is co

Can you define a field without a data element, Can you define a field witho...

Can you define a field without a data element? Yes.  If you require specifying no data element and thus no domain for a field, you can enter data type and field length and a sh

What is data hazard, What is data hazard? Any condition that causes the...

What is data hazard? Any condition that causes the pipeline to stall is known as a hazard. A data hazard is any condition in which either the source or destination operands of

What is ordered directive, Q. What is Ordered directive? This directive...

Q. What is Ordered directive? This directive is used in combination with for and parallel for directives to cause an iteration to be executed in order that it would have been h

Determine the implementation of jit inventory system, Discuss in detail the...

Discuss in detail the features, benefits and implementation of JIT inventory system. JIT - Just in Time inventory systems - meaning, origin, need for JIT, benefits, Use of JIT

What is ternary association, What is ternary association Associations c...

What is ternary association Associations can be binary, ternary, or have higher order. In use, the vast majority of it is binary or ternary associations. Except a ternary assoc

How do we bind keys to menus for shortcuts in gimp, Make ensure that "Use d...

Make ensure that "Use dynamic keyboard shortcuts" option in "Interface" tab of Preferences dialog is enabled, then go to the menu selection you are interested in. Keeping it select

Digital forensic investigation, (a) Name five important activities invol...

(a) Name five important activities involved in a digital forensic investigation. (b) Briefly describe the three types of data that a forensic examiner has to work with. Whic

menu-driven program, Write a menu-driven program to change a time in secon...

Write a menu-driven program to change a time in seconds to other units (minutes, hours, etc.).  The main script will loop to continue until the user chooses to exit.  Every time in

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