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.NET and COM Interface to WSQ Compression
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Overview |
This add on to ImagXpress, the comprehensive imaging toolkit, features the ability to compress images to the FBI WSQ fingerprint compression format. The FBI certifies the Pegasus Imaging libraries meet the accuracy requirements in the WSQ Gray-Scale Fingerprint Image Compression Specification based on the results of the NIST (National Institute of Standards and Technology) review. This add on only supports saving to the WSQ format, since decompression and viewing of WSQ files is already included as standard in ImagXpress.
The benefit of WSQ fingerprint-specific compression is reduced file size. A sample fingerprint with a resolution of 589 pixels by 605 pixels, 8-bit grayscale results in a file size of 325 KB when compressed with the standard lossless compression technology LZW. When compressed with lossy JPEG the file size is 108 KB. When compressed with the Pegasus Imaging WSQ libraries, the file size is 28 KB. This is a space savings of greater than 11X over lossless compression, and almost 4X over JPEG when targeting consistent quality settings.
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