WSQ .NET SDK - Gray-scale Fingerprint Image Compression

.NET managed library .NET Compact Framework support (prerease available) Encoding WSQ images Decoding WSQ images   Get Trial Version   Get Free WSQ Viewer Quantasoft Imaging WSQ .NET Library - Single Developer License 200.00 EUR Buy Now Quantasoft Imaging WSQ .NET Library - Single Runtime License 20.00 EUR Buy Now Quantasoft Imaging WSQ .NET Library - Royalty Free Runtime License 2000.00 EUR Buy Now The Wavelet Scalar Quantization (WSQ) class of encoders involves a decomposition of the fingerprint image into a number of subbands, each of which represents information in a particular frequency band. The subband decomposition is achieved by a discrete wavelet transformation (DWT) of the fingerprint image. Each of the subbands is then quantized using values from a quantization table. No default values for quantization tables are given in this Specification. The quantized coefficients are then passed to a Huffman encoding procedure which compresses the data. Huffman table specifications must be provided to the encoder. Figure 1 shows the main procedures for WSQ encoding and decoding. The same tables specified for an encoder to use to compress a particular image must be provided to a decoder to reconstruct that image. Original Image   JPEG Compression (ratio 14.28)            Original Image   WSQ Compression (ratio 14.28)