2.4 Images

Question 1

What are some different ways you can store images?

Answer 1

• BMP
• JPG
• GIF
• PNG
• TIFF
• SVG
• AI
• PS

Question 2

Give some bitmap image formats

Answer 2

• BMP
• JPG
• GIF
• PNG
• TIFF

Question 3

Give some vector image formats

Answer 3

• SVG

Question 4

Give some editing formats

Answer 4

• AI

- PS

Question 5

What are Bitmap images made up of?

Answer 5

Picture Element (pixels)

Question 6

What is a pixel?

Answer 6

The smallest identifiable area of an image

Question 7

What is each pixel assigned?

Answer 7

A colour which is represented by a binary value

Question 8

How can a pixel’s colour be changed?

Answer 8

Changing the value

Question 9

What is image resolution?

Answer 9

The concentration of pixels within a specific area

Question 10

What is the area in resolution?

Answer 10

The amount of pixels in the width and height of an image

Question 11

What is the typical screen resolution?

Answer 11

72 PPI (Pixels Per Inch)

Question 12

What is the typical print quality resolution?

Answer 12

300 DPI (Dots Per Inch)

Question 13

What resolutions do modern smartphones have?

Answer 13

300+ PPI

Question 14

What does more bits per pixel mean?

Answer 14

More colour combinations

Question 15

What is the formulae that dictates the amount of combinations of colours

Answer 15

2^n where n is the amount of bits

Question 16

How does the number of colours and size of the image affect file size?

Answer 16

They both increase the file size

Question 17

What are PBM monochrome images

Answer 17

Image dimensions and colours are represented in a matrix like bit pattern

Question 18

What is each pixel made up of on a screen?

Answer 18

RGB values

Question 19

Why is hexadecimal used instead of binary for RGB values?

Answer 19

They use numerical values and hex as they are easier for people to read and remember which can reduce errors

Question 20

What is the range of values that can be stored in RGB?

Answer 20

0-255

Question 21

If the range of values that can be stored in RGB is 25, how many bits would you need to store that colour?

Answer 21

8

Question 22

How many bits are required to store the whole pixel with RGB values?

Answer 22

3*8 bits = 24 bits (16.8 million colours)

Question 23

In 32-bit colour, what are the last 8 bits for?

Answer 23

Given to a transparency channel (to allow a background to show through)

Question 24

What is bit depth?

Answer 24

Bit depth is the number of bits available for each sample . The higher the bit depth, the higher the quality of the audio.

Question 25

Why can there be a file difference size of the file from the normal image and when it is stored?

Answer 25

Meta data

Question 26

What is metadata?

Answer 26

Data about data

Question 27

What can be stored in metadata of an image?

Answer 27

Colour depth
Resolution
Date created
Author