April
1999 QUESTION 4 Total Marks: 20 Marks |
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| (a) | The difference between low and high level
vision is in the kind of knowledge they use. Describe high and low level vision with regards to the kind of knowledge used.
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[4] |
| (b) | Extracting information from an image is a
complex task. Even a task like determining if a point is within an object, which is simple
to human, is not easily achieved by computers. Ray-intersection is a technique that can
achieve this. Briefly describe this technique.
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[4] |
| (c) | Briefly describe how patterns can be
recognised using feature analysis.
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[4] |
| (d) | One way of performing pattern recognition is by using template matching. Using appropriate diagrams and examples, describe two problems of this approach. | [8] |