Question Constellation Sign up for free AQA · GCSE · Computer Science · Higher
Binary colour-code mapping
Figure 2 shows four bitmap images.
Figure 3 shows how Image D can be represented as binary data.
| 01 | 01 | 01 | 01 | 01 | 01 | 01 | 01 |
| 01 | 00 | 00 | 00 | 00 | 00 | 00 | 01 |
| 01 | 00 | 10 | 10 | 10 | 10 | 00 | 01 |
| 01 | 00 | 00 | 00 | 00 | 00 | 00 | 01 |
| 01 | 01 | 01 | 01 | 01 | 01 | 01 | 01 |
Complete the table to show the binary representation of each colour in Image D.
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Marking points
- 1 Completes all three colour mappings correctly: White 00, Black 01 and Grey 10.
Full-mark answer
White = 00; Black = 01; Grey = 10.
Why this answer loses marks
I assigned codes from memory without checking the image grid.
The code-to-colour mapping must be inferred from the supplied image and data grid, and every row must agree.