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

Determine in brief about laptop computers, Laptop computers Laptop comp...

Laptop computers Laptop computers have the obvious advantage over desk-top computers (PCs) in that they are fully portable. This is of specific value if a user wishes to do wor

Estimate the circuit switched network, a) Total available bandwidth = 1 Mbp...

a) Total available bandwidth = 1 Mbps = 1000 Kbps Each user requires send data at the rate of = 500 kbps As it is circuit switched network we have to dedicate the bandwidth So the

What are the static and dynamic hazards in logic circuits, If for a short p...

If for a short period of time circuits goes to some dissimilar logic level then it is assumed to have then it is known as static hazard e.g. If the final logic value of output of a

Applications of microprogramming - computer architecture, Applications of M...

Applications of Microprogramming: Microprogramming application:: emulation o   Use of a micro program on 1 machine to execute programs initially written to run on ano

Defining data definition, Defining Types of Data ? The subsequent forma...

Defining Types of Data ? The subsequent format is used for defining data definition:  Format for data definition:  {Name}  Name -   a program references the data

Editor - tools necessary for assembly language programming, Q. Editor - Too...

Q. Editor - Tools necessary for assembly language programming? The editor is a program which allows the user to enter and modify as well as store a group of instructions or tex

What are rdram, What are RDRAM? RDRAM are Rambus DRAM. Rambus needs spe...

What are RDRAM? RDRAM are Rambus DRAM. Rambus needs specially designed memory chips. These chips use cell arrays based on the standard DRAM technology. Multiple banks of cell a

Fail-first - artificial intelligence, Fail-first - artificial intelligence:...

Fail-first - artificial intelligence: Alternatively one such dynamic ordering procedure is known like "fail-first forward checking". In fact the idea is to take advantage of i

Basic operational concepts of a computer, Basic Operational Concepts of a C...

Basic Operational Concepts of a Computer: Most of computer operations are executed in the ALU (arithmetic and logic unit) of a processor. For an example: to add 2 numb

Solution of multi-layer ann with sigmoid units, Solution of multi-layer ann...

Solution of multi-layer ann with sigmoid units: Assume here that we input the values 10, 30, 20 with the three input units and from top to bottom. So after then the weighted s

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