Module 1.2 Flashcards
1
Q
Input
A
- Provides inctructions to software
- Data that needs processing
2
Q
Types of image capture input
A
- Digital Camera
- Smartphone camera
- Top-end DSLR camera
3
Q
Digital Cameras
A
- DLSR: Cameras that have settings changeable lenses (Professional Camera)
- Point-and-shoot: Cameras that are designed fro quick use and do not have lenses or professional settings(Smartphone Camera)
4
Q
Advantages of Digital Cameras
A
- Can take multiple photos(limited to yor memory cards capacity)
- Photos can be viewed and deleted immediately
- Photo can be tranferred to another editing program easily because its already in digital format
5
Q
Disadvantages of digital cameras
A
There are no disadvantages, but they used to be:
* Low light
* Cost
* Quality
6
Q
Specifications that determine quality of digital cameras
A
- Resolution [dpi: dots per inch]: How many pixels make up the image (avg 10-30)
- Lense: The larger the lense, the better the quality
- Sensor: Larger sensors capture more light, even if a smaller one has the same amount of megapixels
- ISO: The sensitivity to light of the camera sensor. This is what determines the quality of low light photos
- Optical zoom: The closer you move towards the object, the clearer it gets (uses the cameras lense)
- Digital zoom: The closer you get, the blurrier and more pixelated it gets (the magnifying tool in editing software)
7
Q
Scanners
A
- An input device used to scan images to a computer
8
Q
Specifications that determine quality for scanners
A
- Resolution: The higher the dpi, the better the quality, but the image will aslo take up more space
- Colour depth: The amount of colours that can be represented by a pixel. Usually has 24bit colour. The higher the colour depth, the more space the image will take up.
9
Q
Advantages of scanners
A
- Many/large documents can be scanned and saved into one file
- Due to things being digital, they take up less office space
- No need for fax anymore
- Old documents can be shared with others ans stored for future generations
- Scanners like barcode and POS speed up work
- QR codes can direct people directly to websites instead of using an URL
10
Q
Disadvantages of Scanners
A
- Quality of scan is dependant on the original copy
- The scan can take long depending on what type it is
11
Q
Examples of data collection devices
A
- In hospitals to record heart rate, pressure, etc
- Used to record weather conditions
- Used by meters to record household water consumption
12
Q
Advantages of data collection devices
A
- Uses less man power
- Faster than human input
- Has less errors than human labour
- More accurate
13
Q
Disadvantages of data collection devices
A
- Could be an unnoticable error that will lead to incorrect infomation
- Could be expensive to install/upgrade/repair
- Not everything can be collected by sensors, so may need human intervention
14
Q
Output
A
- Provied user with feedback on what they were doing
- Give user with a more permanent copy of what was being processed
- Allow the transmission of data between computers/devices
15
Q
Display devices
A
- Show result of processing
- Allows user to make decisions by displaying options
16
Q
Advantages of display devices
A
- Allow interaction between the user and the computer
- Provides immediate feedback
- Displayed content is easily changed or updated
- Font size can be easily adjusted
17
Q
Disadvantages of display devices
A
- Not private
- Consumes the most amount of power
- Output is not permanent
- Difficult to share
- Most expensive part of computer to replace
- Can cause eye strain if very bright and headaches
18
Q
Types of output
A
- Sound
- Touch
- Visual
- Other(electrical transmissions)
19
Q
Specifications that determine quality for monitors
A
- Resolution: Number of pixels
- Response time: How quickly pixels change colour
- Aspect ratio: ratio between the length and width (16:10)
- Colour ratio: the amount of shades between the darkerst black and lightest white
- Lumens: How brigth the projected image is
- DVI and HDMI: Replaces VGA port because they provide quality due to their signlas being digital
20
Q
Drivers
A
- Allows your computer to communicate/connect to hardware and control it
21
Q
Plug-and-play
A
- When you plug something into your device it automatically and immediately gets ready to make use of that device
22
Q
Input/output for disabled people
Blind
A
- Braille keyboards
- Braille mouse
- Braille printer
- Large keyboard
23
Q
Input/output for disabled people
Deaf
A
- Flashing screens
- Vibrations
- On screen output
