WSQ

WSQ (Wavelet Scalar Quantization), also known as FBI Fingerprint Format, is a raster image file format used for storing images of fingerprints. It uses lossy wavelet compression, and supports only grayscale images.

Format
WSQ is similar to JPEG format, though it is not compatible with it.

Identification
Files begin with bytes, and end with.

Specifications

 * WSQ Specification v3 (1997-12-19)
 * WSQ Specification v3.1 (2010-10-04)

Links

 * FBI Fingerprint Format (from archive.org)
 * Wikipedia article