[2021] INFS4205/7205 Advanced Techniques for High Dimensional Data - Final Exam - Q8 Similarity Search
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QUESTION 8
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Given an image database that supports colour-based similarity search.
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(1) [2 marks] Describe a method to extract colour features from an image so that the image can be represented with a high-dimensional vector.
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(2) [3 marks] Define a distance function that can be used to compare the colour features extracted, and describe the steps of the image retrieval process.
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(3) [2 marks] In terms of the definitions of precision and recall, how can we achieve high recall? At what cost?
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