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 computer motherboard, If you open your computers case, the motherbo...

If you open your computers case, the motherboard is the flat, rectangular piece of circuit board to which the whole thing seems to connect to for one reason or one another. It'

What are desirable features of an electronic market place, What are the des...

What are the desirable features of an Electronic Market Place? Features of an Electronic Market Place: 1. Its electronic and business center is not a physical building qu

Explain about wide area network, Q. Explain about Wide Area Network? Wi...

Q. Explain about Wide Area Network? Wide Area Network (WAN) usually refers to a network, which covers a large geographical area as well as use communications subnets (circuits)

Speed up - metrics for performance evaluation, Q. Speed Up - metrics for pe...

Q. Speed Up - metrics for performance evaluation? Speed up is ratio of time needed to execute a given program employing a specific algorithm on a machine with single processor

Show the format text in document window, Q. Show the format text in Documen...

Q. Show the format text in Document window? You can format text in Document window by setting properties in Property inspector. First, select the text you want to format and th

What are the basic components of dialog program, What are the basic compone...

What are the basic components of dialog program? Screens (Dynpros) Every dialog in an SAP system is controlled by dynpros. A dynpros having of a screen And its flow log

What is computer to computer communication, Computer to computer communicat...

Computer to computer communication is: (A)  Simplex                                   (B)  Duplex (C)  Half Duplex                             (D)  Both Duplex and Half D

What is layer, What is layer? A layered system is ordered set of virtua...

What is layer? A layered system is ordered set of virtual worlds. Every build-in terms of one's below it and providing the execution basis for one above it. The objects in ever

What do you mean by consumer behavior, What do you mean by consumer behavio...

What do you mean by consumer behavior? Explain the factors influencing consumer behavior? Factors Influencing Consumer Choice: Consumer choice or decision behaviour refers to t

the bias and standard error , A random variable (X) is modelled as an expo...

A random variable (X) is modelled as an exponentially distributed with mean 30 units. Simulate N = 50 samples from this distribution, and every sample must have m = 20 simulated va

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