April 2000
CO230 : COGNITIVE SCIENCE

QUESTION 4

Total Marks: 15 Marks

• Question 1
• Question 2
• Question 3
• Question 5
• Cover Page

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SUGGESTED SOLUTIONS
for Question 4

(a)Briefly describe the three stages of comutational vision: image acquisition ,low level vision and high level vision .[3 marks ]

(b)High and low level vision can be compared to each other in the four areas of purpose , evaluation ,knowledge and processing mode .For three of these areas,distinguish between high and low level vision.[3 marks ]

(c)Two common techniques of pattern recognition are template matching and feature analysis.For each of the following applications,state which of the two techniques is more appropriate,and justify your answers.
(i)Recognition of cheque numbers [3 marks ]
(ii)Recognition of characters in magazine articles [3 marks ]
(d)Describe how the letter Z can be recognised using feature extraction and spatial relations.[3marks ]