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Consider using different edit distances (cyclic and rotational variant to counter translation for location aware hashes) #29

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KilianB opened this issue Jan 30, 2019 · 1 comment
Open

Consider using different edit distances (cyclic and rotational variant to counter translation for location aware hashes) #29

KilianB opened this issue Jan 30, 2019 · 1 comment
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enhancement New feature or request

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@KilianB
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KilianB commented Jan 30, 2019

Most of the non frequency based hashes encode a subset of the image into a single bit (the hash maps 1 bit of information to specific location).
For motion tracking we use sliding windows to compare hashes. The hamming distance might be off due to simply being translated a bit. Try to find a new edit distance accounting for bigger swaps in the binary string.

Maybe:

  1. naive levenshtein distance
  2. N-Grams (https://www.researchgate.net/publication/237107253_Using_q-grams_in_a_DBMS_for_Approximate_String_Processing) ?
  3. cosine similarity
  4. https://ieeexplore.ieee.org/document/4708948 Edit distance with block swapping
@KilianB KilianB added the enhancement New feature or request label Jan 30, 2019
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KilianB commented Jan 30, 2019

http://www.academia.edu/4400094/A_Better_Edit_Distance_Measure_Allowing_for_Block_Swaps

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