Q1.2 - Binary to Pictures
1. Draw these pictures. Each one is 4 across and 7 down.
They have two colours. 1=black, 0=white. Use the first four numbers to colour
in the first row, use the second four numbers to colour in the second row and
so on.
Picture 1: 1110100110011110100110011110
Picture 2: 0110100110010011100110010110
Picture 3: 0110100110011111100110011001
Picture 4: 0110100110001110100110010110
2. Draw these pictures. Each one is 7 across and 9 down. They have 3 colours.
00 = white, 01=yellow, 11=green. On these pictures, you need to read two numbers
for every one square. As before, once you finish a row, move on to the next
one.
Picture 1: 00010001000100000101010101000001010101010000000101010000
1100001100001111110011001111111100110011110011111111110000001111110000
Picture 2: 00000000000000000000010000000000011101000000011111110100
0111111111110101111101111101011111011111010111110111110101010101010101
Picture 3: 11000001000011000001110100000001110111010001110100011101
1101000000011101110100011101000111011101000000011101000011000001000011
3. What does this binary picture draw?
header information: 2 colours. 1=green, 0=blue. 11 bits
across. 15 bits down. not compressed.
000001000000000111000000001110000
100001000011100111001111010001011
011000001100010000010000100000100
001000001000011000110000011111000
011101011100110010011001000010010
4. What does this binary picture draw?
header
information: 2 colours. first number is white, second is black and so on alternating
for the row. 10 bits across. 14 bits down.
8,2
6,2,1,1
9,1
2,1,2,1,3,1
2,4,2,1,1
1,1,1,1,1,2,1,1,1
2,4,3,1
3,2,1,4
2,8
2,8
2,5,1,2
2,2,1,2,2,1
2,1,3,1,1,2
1,2,2,2,3
5. What does this binary picture draw?
header
information: 2 colours. first number is red, second is white and so on alternating
for the row. 8 bits across. 9 bits down.
32324212221122211611611222103230323
6.
An image
in 24-bit colour takes 6 MB of memory.
(a) Calculate the size of the same image if it is held in 8-bit colour.
(b) Calculate the length of time taken to transmit the 24-bit image at a speed
of 6 kilobytes per second.
7. Assume that a video system stores colors as 6-bit integer values. State
the number of different color values that can be stored in this system.[1 mark]
8. A satellite transmits data at 64 Kilobits per second. Calculate the approximate
total storage requirements for storing 1 hour of data, and state the answer
as a number of Megabytes.
9. The colour of a pixel can be stored as a 16-bit integer.
(a) State how many different colours can be represented in a 16-bit integer
field.
(b) State whether this storage system for colour values is digital or analog.
(c) Outline one advantage and one disadvantage of using 32-bits per-pixel to
store colours instead of 16-bits per-pixel.