WSQ 文件 - 压缩
我收到了 WSQ 格式的包含 1.000 个指纹的样本(WSQ 文件 - 100 个人,每个人有 10 个指纹)。
我知道WSQ是一种压缩格式。我的问题是:有没有办法再次压缩它?
压缩算法应该找到指纹文件之间的模式。
多谢!
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!
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这是不太可能的。
直接应用于 SWQ 文件的压缩算法可能会在文件结构中发现一些重复,最有可能在标头中。这可能会带来百分之几的收益,但不会更多。
无论如何,通过使用“solid”模式下的简单压缩程序(例如 7zip)来测试这个假设是不会出错的。
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.
是的,NBIS 包中提供了 WSQ 编码器(和解码器)的参考实现:
http://www.nist.gov/itl/iad/ig/nbis.cfm
Yes, a reference implementation of a WSQ encoder (and decoder) is provided in the NBIS package:
http://www.nist.gov/itl/iad/ig/nbis.cfm