Types of user interfaces

12.3.1.4 define the advantages and disadvantages of a graphical user interface (GUI)

12.3.1.5 define the advantages and disadvantages of a command line interface (CLI)

12.3.1.6 define the advantages and disadvantages of natural-language and gesture-recognition user interfaces 

User interfaces

The user interface is the means of interaction between the user and the computer system.

Video "User interfaces"

Types of user interfaces:

  • Graphical User Interface (GUI),
  • Command Line Interface (CLI), 
  • Natural Language Interface (NLI)
  • Gesture Recognition Interface (GRI)

Graphical User Interface

When using a graphical interface, the user usually executes commands with graphical objects of the system (menus, icons, buttons, etc.) using the mouse pointer or touchpad for interaction.

Advantages Disadvantages
+ Easy to use for beginners - Uses a lot of memory and processing power
+ You do not have to learn complicated commands - Difficult to develop
+ Allows you to easily share information between programs using "cut and paste" or "drag and drop" - For advanced user, use is slower than command line interface
  - May be annoying for power users when simple tasks require a series of operations

Examples, Windows, MacOS, etc.

 

Command Line Interface

User interaction with the command line interface occurs by entering commands designed to perform specific operations.


When working with such interfaces, the user needs to know the set of commands that he can use to perform certain actions.
To work with this type of interface, a keyboard must be connected.
The use of the command line interface does not require large computer resources, since complex graphical objects are not used.

Advantages Disadvantages
+ Can run on simple hardware with limited resources. - Requires learning commands
+ Advanced users execute some commands faster than in the graphical interface - Some commands take longer to execute than other types of interfaces
+ Efficiently use on servers - No possibility of native understanding

Example: MS-DOS

Natural Language Interface

To interact with the interface of a natural language, words, phrases of the languages ​​of communication (English, Kazakh, Russian) are used, which are determined by the system as commands for execution.

Advantages Disadvantages
+ The user does not need to be trained on how to use the interface - The interface can only respond to programmed commands
Suitable for people with disabilities Very difficult in programming, so it is used when other types of interface are not suitable
Allows interaction at a distance The voice interface may need training as different users have different pronunciation.

Examples: Alisa, Siri, Alexa, Google Assistant or Cortana, etc

Gesture Recognition Interface

The gesture recognition interface includes the ability of the system to recognize hand gestures (movements) and even recognize emotions by face. In such systems, users can use simple gestures to control or interact with devices without physically touching them. Many approaches have been made using cameras and computer vision algorithms to interpret sign language.

Also Touch sensitive interface relates to GRI. They work by your finger touching the screen. The touching is detected and translated by the device into instructions. As well as tapping, the screen can sense swiping and pinching actions.

Advantages Disadvantages
It is an intuitive and natural way of interaction. Irrelevant objects with hand can mislead the recognition system.
Recognizes both static and dynamic hand movements. The performance of this system drops as the distance between user and camera increases.
Easily to be implemented in real-time systems. It still doesn’t produce an interface that can replace physical controllers.
It has minimal hardware requirements.  

Examples: Wii, Microsoft's Kinect, Android, iOS


Questions:


Exercises:

Ex. 1


Exam questions:

Why do some system administrators prefer to use Telnet (a CLI) instead of a GUI to control remote computers? (Marks: 2)
  • Answer. Sending text commands over the internet is very fast as very little data needs to be sent and received (1). Using a GUI would take up a lot of bandwidth (1). Additionally, some commands might be faster to perform using a CLI than a GUI (1).

 

Категория: System software | Добавил: bzfar77 (12.01.2021)
Просмотров: 98 | Теги: Gui, CLI, User interface, operating system, NLI, gli | Рейтинг: 5.0/1
Всего комментариев: 0
avatar