What is Input Device | Types of Input Devices | Computer Devices

Computer Education For all
18 Oct 201713:03

Summary

TLDR本视频课程介绍了计算机输入设备的种类和用途。主要讲解了键盘、鼠标、触摸屏、语音识别系统和数据扫描设备等功能和特点。键盘分为功能键、数字键和字母键,鼠标有多种类型如轨迹球、摇杆和激光鼠标。语音识别系统帮助残疾人通过语音输入数据,而数据扫描设备如图像扫描仪和光学字符识别(OCR)软件则将纸质文档转换为电子格式。此外,还介绍了条形码阅读器、磁墨字符识别(MICR)和电子卡读卡器等设备。

Takeaways

  • 📱 键盘是标准输入设备,具有约101至214个键,分为功能键、数字键和字母数字键。
  • 🔢 数字键区用于输入数字数据,可通过Num Lock键开启或关闭。
  • ⌨️ 键盘上的字母数字键用于输入字符和数字数据,具有QWERTY布局。
  • 🔑 特殊键包括页面上下移动、插入、删除等功能。
  • 🠹 屏幕导航键,如箭头键,用于在屏幕上移动光标。
  • 🖊️ 指点和绘图设备,如轨迹球、操纵杆、鼠标、光笔、触摸屏和数字化器。
  • 🖱️ 鼠标是常用的指点设备,有线和无线两种,轮鼠标可快速滚动页面。
  • 📱 触摸屏允许用户通过触摸屏幕直接输入数据。
  • 🔊 语音识别系统将人的语音转换为文本,对残疾人特别有帮助。
  • 📸 数据扫描设备,如图像扫描仪,将纸质文档转换为电子格式。
  • 🖨️ OCR软件将扫描的文档图像转换为可编辑的文本格式。

Q & A

  • 输入设备的主要作用是什么?

    -输入设备的主要作用是将数据和指令输入到计算机中。

  • 键盘设备通常有多少个键?

    -标准的键盘设备通常有101到214个键。

  • 键盘主要分为哪三个部分?

    -键盘主要分为功能键区、数字键区和字母及符号键区。

  • 功能键(F1到F12)有什么用途?

    -功能键是可编程的,用于执行特定的存储功能,例如F1键通常用于帮助选项。

  • 什么是点选设备?

    -点选设备是一种输入设备,帮助用户快速指向并选择屏幕上显示的图标。

  • 列举几种常见的点选设备。

    -常见的点选设备包括轨迹球、操纵杆、鼠标、光笔、触摸屏和数字化仪。

  • 触摸屏如何工作?

    -触摸屏允许用户通过直接触摸显示屏上的数据来输入,非常简单易用。

  • 语音识别系统的作用是什么?

    -语音识别系统允许人们通过语音输入数据到计算机,将人声转换为文本。

  • 图像扫描仪的主要用途是什么?

    -图像扫描仪将纸质文档转换为电子格式,并存储在计算机中,用于保存重要文档。

  • 光学字符识别(OCR)软件是如何工作的?

    -OCR软件首先创建文档的图像,然后将该图像转换为计算机可解释的ASCII文本。

  • 磁墨水字符识别(MICR)系统用于什么?

    -MICR系统用于读取磁性编码字符,通常用于银行支票的处理。

  • 机器视觉输入系统在工业设计中有什么应用?

    -机器视觉输入系统用于设计工业机器人,它能识别其镜头范围内的视觉图像。

Outlines

00:00

🖥️ 输入设备概述

本段落介绍了输入设备的目的和种类,包括键盘、语音识别系统、指点设备和数据扫描设备。键盘作为标准输入设备,具有多种键区,如功能键、数字键和字母键。此外,还讨论了指点设备如鼠标、轨迹球、光笔和手写板的功能,以及它们如何帮助用户与计算机交互。

05:02

🖱️ 鼠标及其他指点设备

这一部分详细介绍了不同类型的鼠标,包括有线鼠标、无线鼠标、滚轮鼠标和激光鼠标,以及它们的功能和使用场景。还提到了轻笔,这是一种用于绘图的指点设备。触摸屏和数字化设备也被讨论,它们允许用户直接在屏幕上输入数据或将图像转换为数字形式。

10:04

📄 数据扫描与识别技术

本段内容聚焦于数据扫描设备,如图像扫描仪和光学字符识别(OCR)技术,以及它们如何将纸质文档转换为电子格式。同时,介绍了光学标记阅读器(OMR)、条形码阅读器、磁性墨水字符识别(MICR)和电子卡读卡器的作用。最后,探讨了机器视觉输入系统在工业机器人设计中的应用。

Mindmap

Keywords

💡输入设备

输入设备是用于将数据和指令输入计算机的硬件。在视频中提到了多种输入设备,如键盘、鼠标、触摸屏等,它们各自有不同的功能和使用方法,是人机交互的重要组成部分。

💡键盘

键盘是计算机最常见的输入设备之一,类似于传统打字机,包含字母、数字和功能键等。用户通过键盘输入字符和数字,以及执行特定命令。

💡鼠标

鼠标是一种点选设备,允许用户通过移动屏幕上的指针来选择图标或执行命令。鼠标有多种类型,如有线鼠标、无线鼠标、带滚轮的鼠标和激光鼠标等。

💡触摸屏

触摸屏是一种允许用户直接通过触摸屏幕输入数据的技术。它简单易用,广泛应用于移动设备和一些计算机界面。

💡语音识别系统

语音识别系统能够将人的语音转换成文本,对于残疾人士特别有帮助。这种系统通过软件或设备先识别词汇,然后将其转换为文本或命令。

💡数据扫描设备

数据扫描设备用于将纸质文档转换为电子格式并存储在计算机中,以便长期保存和检索。常见的数据扫描设备包括平板扫描仪和手持扫描仪。

💡光学字符识别(OCR)

光学字符识别(OCR)是一种技术,通过扫描文档并使用OCR软件将图像转换成可编辑的文本格式。这对于将纸质文档数字化非常有用。

💡条形码阅读器

条形码阅读器是一种设备,通过读取商品上的条形码来识别价格或其他信息。它在零售业中非常常见,帮助商家快速获取商品信息。

💡磁墨水字符识别(MICR)

磁墨水字符识别(MICR)是一种系统,用于读取磁性编码的字符,通常用于支票和其他金融文件的处理。

💡电子卡阅读器

电子卡阅读器用于读取智能卡,如银行卡、信用卡等。它通过读取卡片上的磁条信息来获取用户数据。

💡机器视觉输入系统

机器视觉输入系统是一种先进的输入设备,能够识别其镜头范围内的视觉图像,主要用于设计工业机器人等领域。

Highlights

描述了输入设备的目的,即输入数据和指令到计算机中。

区分了不同类型的输入设备,包括键盘设备、语音识别系统、指点设备和数据扫描设备。

详细介绍了键盘设备的组成部分,包括功能键、数字键、字母键和特殊键。

解释了指点设备如何帮助用户快速指向和选择屏幕上的图标。

列举了流行的指点设备,如轨迹球、操纵杆、鼠标、光笔、触摸屏和数字化仪。

描述了轨迹球和鼠标的工作原理及其在移动光标位置方面的应用。

介绍了光笔作为绘图工具的特点,以及它如何在屏幕上快速移动。

讨论了触摸屏的功能,允许用户直接通过触摸屏幕输入数据。

解释了语音识别设备如何将人声转换为文本,并对残疾人士特别有帮助。

介绍了数据扫描设备,如图像扫描仪和光学字符识别(OCR)软件。

说明了光学标记阅读器如何帮助评分客观题型的答题卡。

描述了条形码阅读器在商店中的应用,以及如何快速识别商品价格。

讨论了磁墨水字符识别(MICR)系统如何识别和处理印刷或手写的字符。

介绍了电子卡阅读器如何读取智能卡,例如信用卡或借记卡。

解释了机器视觉输入系统如何识别其镜头范围内的视觉图像,特别是在工业机器人设计中的应用。

Transcripts

play00:04

this program comprises unit three input

play00:08

devices after completion of this unit

play00:11

you will be able to describe the purpose

play00:13

of input devices distinguish between

play00:16

different input devices have knowledge

play00:19

about keyboard devices have knowledge

play00:22

about speech recognition system have

play00:25

knowledge about point and draw devices

play00:27

have knowledge about date scanning

play00:30

devices the input devices are used to

play00:33

enter data and instructions into the

play00:36

computer following are most widely used

play00:38

input devices keyboard device keyboard

play00:42

is a standard input device as readily

play00:45

available for us to feed the data a

play00:48

keyboard is similar to a conventional

play00:50

typewriter with about 101 214 keys as

play00:55

shown below a keyboard is divided into

play00:58

three major parts function keys numeric

play01:02

keys and phonetic numeric keys special

play01:05

case and screen navigation keys function

play01:08

keys function keys are twelve in number

play01:11

labeled as f1 to f12 function keys are

play01:15

programmable keys to perform a specific

play01:17

stored function for example f1 key is

play01:21

used for help option numeric keys

play01:24

numeric keypad is very important for

play01:27

entering numeric data a numeric keypad

play01:30

is switched on and switched off by

play01:33

pressing num lock key

play01:36

it is mostly situated on the right side

play01:39

of the keyboard

play01:41

0 to 9 and plus/minus stearic slash and

play01:46

enter keys are present in such a

play01:49

keyboard a numeric keypad can also be

play01:53

used for arrow keys and page up-and-down

play01:56

tasks as mentioned on the keys

play02:01

alphabetic and numeric keypad

play02:05

alphanumeric keypad has alphabetic keys

play02:08

and numeric keys this is a standard

play02:11

keypad and is similar to a typewriter

play02:15

these keys are used to type the

play02:18

character data as well as numeric data

play02:21

it has QWERTY keypad and is used to

play02:25

enter a-to-z alphabets both in upper and

play02:28

lowercase letters in the above keypad

play02:32

alphabetic Keys 0 to 9 and numeric keys

play02:36

are present and some symbols are printed

play02:39

and can be used by using the shift key

play02:42

special keys these are some keys

play02:46

situated between alphanumeric and

play02:49

numeric keypad and surround the

play02:52

alphanumeric keypad as well these are

play02:55

page up page down home and insert delete

play03:01

and tab caps lock shift ctrl alt Windows

play03:09

escape etc screen navigation keys these

play03:15

are called

play03:16

arrow keys situated between alphanumeric

play03:19

and numeric keypad

play03:20

these are for arrow keys like left right

play03:24

up and down arrow keys these are used to

play03:29

move cursor anywhere on the screen point

play03:32

and draw devices point and draw device

play03:37

is an input device which helps to

play03:39

rapidly point and select an icon to

play03:42

display on the screen some popular input

play03:46

devices are trackball joystick mouse

play03:51

light pen touchscreen and digitizer

play03:57

trackball trackball trackball works just

play04:02

like a mouse

play04:03

tragg ball contains only one ball

play04:05

instead of different buttons like left

play04:08

or right etc trackball uses this fall to

play04:12

move the cursor position from one

play04:15

location to the other

play04:16

trackball neither uses any such pad nor

play04:20

covers much space joystick joystick is a

play04:27

pointing device joystick is mostly used

play04:31

by children to play their games it

play04:33

consists of a handle which can be used

play04:36

to move the object position left-right

play04:39

and down joystick can also be attached

play04:44

with the television set it uses USB or

play04:48

special port supplied with sound card

play04:50

for connection mouse mouse is a pointing

play04:56

device a user can move pointer very

play04:59

rapidly on the screen with the help of

play05:01

mouse mouse controls the movements of

play05:05

the cursor positions there is variety of

play05:08

mouse available in the market for

play05:11

example real Mouse lays amongst wireless

play05:16

mouse etc wheel mouse wheel mouse

play05:21

contains left/right buttons and a wheel

play05:25

button at the middle wheel button is

play05:27

used to scroll the pages up and down

play05:30

very rapidly laser mouse laser mungs

play05:35

uses the laser beam for its movement

play05:37

laser mouse does not need any mouse pad

play05:41

laser mouse is automatically activated

play05:43

as it is attached with the computer

play05:47

light pen light pen is a pointing device

play05:52

which is used for making drawings light

play05:55

pen rapidly moves on the screen just

play05:58

like an ordinary pen but it works with

play06:01

electricity light pen does not need any

play06:04

alphabetic keys touchscreen touchscreen

play06:09

enables the user to touch the data

play06:12

directly by using fingers within the

play06:15

display area

play06:17

that screen is very simple and easy to

play06:20

use currently it is also used in mobile

play06:23

phones digitizer digitizer is used to

play06:29

convert maps pictures and drawings into

play06:32

a digital form to store in the computer

play06:35

system a digitizer consists of a

play06:38

digitizing tablet and a stylus pen

play06:43

digitizing tablet is a flat surface on

play06:46

which stylus or a pen is moved to draw

play06:49

shapes pictures or maps etc speech

play06:54

recognition device speech recognition

play06:57

allows a person to input data to the

play07:00

computer through speech speech

play07:03

recognition device converts the human

play07:06

voice into text

play07:07

this device is specially helpful for

play07:11

disabled people speech recognition has

play07:14

the capability to first recognize words

play07:17

with the help of software or a device

play07:20

and then convert it into text or command

play07:24

types of speech recognition system

play07:27

single word speech recognition system

play07:31

these systems recognize only single

play07:34

words like hello yes/no at one time

play07:40

continuous type of word speech

play07:42

recognition system this type of speech

play07:46

recognition system recognizes more than

play07:49

one word or a complete sentence for

play07:52

example hello how are you at one time

play07:58

uses of speech recognition system speech

play08:02

recognition systems are specially

play08:04

helpful for disabled people who cannot

play08:07

write it helps people who feel

play08:11

comfortable in speech rather than

play08:14

writing it facilitates a user in a

play08:17

situation where he or she is unable to

play08:20

edit or review a long text it also helps

play08:24

the user who is quite busy and doesn't

play08:27

want to type the data due to shortage of

play08:30

time

play08:31

data scanning devices image scanner an

play08:35

image scanner translates the printed

play08:38

documents into an electronic format and

play08:40

stores them into the computer important

play08:44

documents can be preserved in an

play08:46

electronic form by using image scanner

play08:49

for later use image scanners are further

play08:52

classified into the following two types

play08:55

flatbed scanner flatbed scanner is like

play08:59

a photocopier machine with a glass sheet

play09:02

flatbed scanners are also called desktop

play09:06

scanners in a flatbed scanner the paper

play09:10

is placed on a glass sheet and a light

play09:13

source is moved horizontally from one

play09:16

line to other line the process is

play09:18

repeated until all the lines are

play09:20

completed handheld scanners handheld

play09:25

scanners work much like a flatbed

play09:27

scanner but it works manually by the

play09:30

user itself for scanning the documents

play09:33

or products the scanner is dragged

play09:35

slowly with its light on handheld

play09:39

scanners are mostly used in shops to

play09:42

scan the price of products optical

play09:46

character recognition optical character

play09:49

recognition is also called optical

play09:52

character reader optical character

play09:55

readers use a software called OCR

play09:58

software OCR software the scanner first

play10:03

creates an image of the document and

play10:06

then the OCR software converts that

play10:08

image into a SC to text computer

play10:13

interprets the ASC two texts as letters

play10:16

numbers and special characters om our

play10:22

optical mark reader optical mark reader

play10:26

has the capability to recognize the pre

play10:29

mentioned marks either of a pen or a

play10:32

pencil optical mark reader is

play10:36

specifically helpful for making

play10:39

objective type questions the student

play10:42

mark the answer sheet by filling or

play10:45

turning a circle oval shaped or square

play10:48

this printed answer sheet is fed into

play10:52

the computer and the grading is done by

play10:54

using optical mark reader me see our

play10:59

barcode reader it is normally used in

play11:03

shops glossary stores etc this device

play11:08

contains the photoelectric cells that

play11:11

read barcodes consisting of lines having

play11:14

different thickness barcode reader helps

play11:17

shopkeepers to analyze the price of an

play11:20

item immediately m.i.c are magnetic ink

play11:26

character recognition m.i.c are is used

play11:30

to read the magnetically encoded

play11:32

characters m IC r is the system that

play11:36

provides a full alphanumeric recognition

play11:39

of printed or handwritten characters by

play11:42

simply scanning the form a user scans

play11:45

the data through a scanner which is

play11:48

recognized by an engine of the OCR

play11:50

system the m IC r converts the images

play11:54

into machine readable characters

play11:57

electronic card reader EC our electronic

play12:02

card reader is used to scan ecards smart

play12:06

cards like Visa card bank credit cards

play12:09

etc an electronic card reader reads the

play12:13

memory card of the ATM or debit card or

play12:16

Visa card etc the memory card is in the

play12:20

form of a black strip which is wiped

play12:22

through an electronic card reader

play12:24

machine vision input system vision input

play12:29

system is one of the latest input

play12:31

devices that recognize the vision image

play12:35

which appears in the range of its lens

play12:38

these are specially used to design

play12:41

industrial robots

play12:50

you

Rate This

5.0 / 5 (0 votes)

Étiquettes Connexes
输入设备键盘功能语音识别点选绘图数据扫描图像扫描条形码光学字符磁墨字符电子卡读
Besoin d'un résumé en anglais ?