| Feature distance |
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| How to define the
difference between two features f1, f2? |
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| • | Simple approach
is SSD(f1, f2) |
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| – | sum of square
differences between entries of the two descriptors |
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| – | can give good
scores to very ambiguous (bad) matches |
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| f1 |
| f2 |
| I1 |
| I2 |