Lecture on Input Devices

Slides:

Advertisements

Similar presentations

AQA INFO 1 SECTION 4 Selection & Use of Input devices and media tcowling 2009 from Mott, Leaming & Williams.

Advertisements

In put Devices and Media In order for a computer to do anything it must be told what to do.

devices... Inputs and Output Keyboard The commonest way to enter data into a computer. Each key is simply a switch, which when pressed, results in a.

Presented By Md. Habibul Islam Hamdu Deprtment Of Marketing Hamdard University Bangladesh.

INFORMATION TECHNOLOGY Data Capture and Input Methods.

HARDWARE INPUT DEVICES ITGS. Strand 3.1 Hardware Input Devices Keyboards Pointing devices: Mice Touch pads Reading tools: Optical mark recognition (OMR)

Fundamentals of Computer and programming in C Rohit Khokher.

Input to the Computer * Input * Keyboard * Pointing Devices

Lesson 4 Alternative Methods Of Input.

Ch CHAPTER Input & Output Irfan A. Ilyas Week15 – Lecture02.

BRETT GIPSON PRESENTS CHAPTER 5. DESCRIBE INPUT Input devices translate words, sounds, images and actions that people understand into symbols that the.

AUTOMATIC DATA CAPTURE  a term to describe technologies which aim to immediately identify data with 100 percent accuracy.

Complete the below… Input Complete the below… Processing Input Complete the below…

Input devices, processing and output devices Hardware Senior I.

Input Devices. Keyboard Keyboard is used to type text Application Application Word- Processing Word- Processing.

1 Introduction to Computers Day 2. 2 Input Devices Input devices are used to feed data and instructions to the computer systems.They consist of a range.

AS Level ICT Selection and use of input devices and input media: Capturing transaction data.

GCSE Information Technology Input Devices and Methods Objectives:  To understand what input devices are.  Identify their individual uses  Be able to.

Input devices are hardware components that enable users to interact with a computer. Without input devices, you would not be able to feed instructions.

Chapter 5 Input. What Is Input? What are the input devices? Input device is any hardware component used to enter data or instructions Data or instructions.

INPUT DEVICES. KEYBOARD Most common input device for a computer.

 Optical Scanners Optical Scanners  Scanners Scanners  Electronic Tablet/Pen Electronic Tablet/Pen  Digital Camera Digital Camera  Webcam Webcam.

LESSON 2 Input and Output Devices

Input, Chapter 4 ITSC 1401, Intro to Computers Instructor: Glenda H. Easter.

Excellence Publication Co. Ltd. Volume Volume 1.

AS Module 2 Information; Management and Management and Manipulation or what to do with data, how to do it, and……... ensure it provides useful information.

Input Devices Manual and Automatic By Laura and Gracie.

DATA COLLECTION METHODS CONTENT PAGE How data is collected via questionnaires. How data is collected via questionnaires. How data is collected with mark.

COMPUTER PARTS AND COMPONENTS INPUT DEVICES

Data Capture Understand the concept of data encoding. Describe methods of data capture and identify appropriate contexts for their.

 Data or instructions entered into memory of computer  Input device is any hardware component used to enter data or instructions 2.

Data Capture By Chris McBride. What is Data Capture ? There are a large variety of sources from which data can be acquired and and many devices that can.

Review of Data Capture. Input Devices What input devices are suitable for data entry? Keyboard Voice Bar Code MICR OMR Smart Cards / Magnetic Stripe cards.

Computers Storage and Input/Output Devices Input and Output Devices Input device – converts our commands and data into a form a computer can understand.

Slide 1 A Free sample background from © 2003 By Default! HANDLING DATA IN INFORMATION SYSTEM 19 July 2005 Tuesday Lower 6.

The Computer  an electronic data processor. Computer Systems  many systems have this structure.

Input Devices By Mrs. Gonzales. All the input, output and storage devices connected to and dependent on a computer for operation are called peripherals.

Describe direct data entry and associated devices, e. g

Section 2B. Objectives List two reasons why some people prefer alternative methods of input over a standard keyboard or mouse. List three categories of.

INPUT DEVICES. Keyboard & Mouse  Keyboard: Enter text and commands  Mouse: Point, Select & enter Commands.

Topic 2 Input devices. Topic 2 Input devices Are used to get raw data into the computer so that it can be processed Include common input devices such.

The Big Picture Things to think about What different ways are there to collect information automatically? What are the advantages and disadvantages of.

QSREALM.BLOGSPOT.COM Input Output Devices. QSREALM.BLOGSPOT.COM Input – Output Devices Also known as Peripheral Devices. These surround a computer’s CPU.

Memory Random Access Memory (RAM) and Read Only Memory (ROM)

Hardware.  Know that there are lots of different input devices  Understand why each type of input device is suitable for a different purpose  Be able.

Input devices Device that accepts data and instructions from the outside world Keyboard Mouse Trackball Joystick Light pen Touch Screen Scanner Bar code.

Standard Input Devices

Lesson 4 Alternative Methods Of Input.

A device tat transfers data from the outside world into a computer

Chp 4: Input and Output Devices

Alternative Methods Of Input

DATA COLLECTION Data Collection Data Verification and Validation.

Standard Methods of Input.

LECTURE Course Name: Computer Application

Selection and Use of Input Devices and Input Media High Volume Devices

INTRODUCTION TASK PROCESS RESOURCES ACTIVITIES CONCLUSION

Chapter 5 - Input.

Lesson 4 Alternative Methods Of Input.

Inputting Data In Other Ways

Introduction to Computers

INFORMATION & COMMUNCATIONS TECHNOLOGY …

What is Input "Any data or instruction that is entered into a computer is called input". This data or instruction can come directly from end user or.

Lesson 4 Alternative Methods Of Input.

Introduction to Computers

Presentation transcript:

Lecture on Input Devices www.AssignmentPoint.com

Topics Keyboard OCR Mouse Scanner or digitizer Touch screen Video digitizer Light pen MICR Joysticks Digital camera Trackball Voice or Speech input system Bar code reader OMR

Uses for which OCR is Suitable OCR is used in billing (e.g. gas and electricity bills, insurance premium renewals) and giro-forms. Billing often involves a turn-around document. For example, electricity bills are prepared in OC by the computer, sent out to customers who return them with payment checques. The documents are then re-entered via the OC reader into the computer system as evidence of payment. Note that no transcription is needed.

Advantages of OCR Key-entry is eliminated and data is captured in machine-readable form at the earliest opportunity. This should increase throughput and reduce costs and input errors. Characters can be read by people. Document design is less complicated and cumbersome than for OMR forms. Printing for OCR must meet high standards, and this is expensive. OCR is economical only when a large number of documents are to be processed. Only certain types of printed or handwritten characters are recognized. Document readers are relatively expensive. Only certain fonts are acceptable. The reject rate depends on the quality of the document, e.g. smudges, damaged forms, torn forms, etc. A high standard of printing is needed. Hand-printed characters can cause high rejection rates. Document design must still follow a rigid format.

Situations where OMR is used The data to be input is simple; The volume of data is large enough to justify designing documents; Turn around documents are used; Preparation equipment would be expensive or impractical.

Some examples of uses for where OMR are suitable Multiple-choice examinations, aptitude tests; Insurance premium collection; Market research questionnaires - consumer research; In supermarkets for stock reordering; Traffic surveys; Payroll data entry.

Advantages of OMR Sensitivity can be altered to allow for different surfaces and pencils and inks. Has a better recognition rate than OCR. Can be prepared where data originates, without machines. Errors are easily corrected.

Disadvantages of OMR Mark readers are relatively slow. Verification of marked data is difficult. Document may be difficult to understand and fill in or impractical to design. The document reader will have to be reprogrammed for each new document design.

Uses of bar codes On labels on shelves - used for stocktaking, e.g. in factory stores. Printed on shop goods - see supermarket example. In libraries - for book and borrower identification.

Advantages The characters are easily recognizable to the human being. There is high accuracy in reading the characters by the input device. The input devices are reasonable in cost. MICR coding is flexible since documents of varying sizes, thickness and widths can be used without hampering the processing capability of the reading or sorting equipment.

Digital Camera A digital camera (or digicam) is a camera that takes video or still photographs, or both, digitally by recording images via an electronic image sensor. Many compact digital still cameras can record sound and moving video as well as still photographs.