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Quick start:

Encode thesmpte.pnmPNM picture file intoencoded.dwt:

./encode smpte.pnm encoded.dwt

Decodeencoded.dwt back to the original picture filedecoded.pnm:

./decode encoded.dwt decoded.pnm

View thedecoded.pnm picture file infeh:

feh decoded.pnm

Allocate a maximum of65536 bytes of space for compression. If necessary, the encoder will discard quality bytes to ensure the output stays below65536 bytes:

./encode smpte.pnm encoded.dwt 65536

• Run-length encodings
  by Solomon W. Golomb - 1966
• Image coding using wavelet transform
  by M. Antonini, M. Barlaud, P. Mathieu and I. Daubechies - 1992
• Factoring wavelet transforms into lifting steps
  by Ingrid Daubechies and Wim Sweldens - 1996
• Wavelet transforms that map integers to integers
  by A. R. Calderbank, I. Daubechies, W. Sweldens, and B.-L. Yeo - 1996