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WSQ file - Compression

I received a sample with 1.000 fingerprints (WSQ files - 100 people with 10 fingerprints each) in WSQ format.

I know that WSQ is a compressed format. My question is: Is there a way to compress this again?

The compression algorithm should find patterns between fingerprints file.

Thanks a lot!

Solution

  • This is quite unlikely.

    The compression algorithm applied directly on SWQ files may find some repetitions in the file structure, most likely in the header. This will provide maybe a few % of gains, but no more.

    In any case, you can't be wrong with testing this hypothesis by using a simple compression program in "solid" mode, such as 7zip.