Learning Objectives
Noureddine Tadjerout
108
Learning Objectives
Noureddine Tadjerout
109
3.2 Input and Output Devices
Keyboard – Input Device
Screen – Output Device
It is allows you to type
and input this
information for the
computer to understand.
It shows you the
information on the screen.
The output displays the
information.
Noureddine Tadjerout
110
Which are Inputs & which are Outputs?
Noureddine Tadjerout
111
3.2: Input Devices
Noureddine Tadjerout
112
3.2 Input and Output Devices
Watch the video for Input Devices
https://www.youtube.com/watch?v=rkhT6s5g0pE
Noureddine Tadjerout
113
3.2 Input and Output Devices
Watch the video for Input Devices
Noureddine Tadjerout
114
3.2 Input and Output Devices
Watch the video for Input Devices
Noureddine Tadjerout
115
3.2 Input and Output Devices
Noureddine Tadjerout
116
3.2 Input and Output Devices
Noureddine Tadjerout
117
3.2 Input and Output Devices
Noureddine Tadjerout
118
3.2 Input and Output Devices
Noureddine Tadjerout
119
3.2 Input and Output Devices
Noureddine Tadjerout
120
3.2 Input and Output Devices
28/11/2022
121
3.2 Input and Output Devices
Noureddine Tadjerout
122
3.2 Input and Output Devices
Noureddine Tadjerout
123
3.2 Input and Output Devices
Noureddine Tadjerout
124
3.2 Input and Output Devices
Noureddine Tadjerout
125
3.2 Input and Output Devices
Noureddine Tadjerout
126
3.2.1-Input Devices
2D scanners:
Application of 2D scanners at an airport
• 2D scanners are used at airports to read passports. They make use of OCR technology
• to produce digital images which represent the passport pages. Because of the
• OCR technology, these digital images can be manipulated in a number of ways.
For example: the OCR software is able to review these images, select the text part, and then automatically put the text
into the correct fields of an existing database. It is possible for the text to be stored in an ASCII format – it all depends on
how the data is to be used.
• At many airports the two-dimensional photograph in the passport is scanned and stored as a JPEG image. The
passenger’s face is also photographed using a digital camera (a 2D image is taken so it can be matched to the image
taken from the passport). The two digital images are compared using face recognition/detection software. Key parts of
the face are compared. Lets see the video below How does Facial Recognition works?
3.2.1-Input Devices
3D Scanners:
Existing3D scanning is an exciting new technology that has had a positive impact in both medical and
industrial fields.
Medical - Scanning the human body/ parts allows doctors to take a closer look an possible problems virtually
which can aid in giving a correct diagnosis
e.g. taking an MRI scan of your knee to look for a small tendon tear.
Industrial - Existing tools or parts can be scanned into digital format. Once scanned in the object can be
altered and tested using specialist 3D software.
3.2 Input and Output Devices
Noureddine Tadjerout
129
3.2 Input and Output Devices
Noureddine Tadjerout
130