Wavelet transform

• Block grouping from tree

• Modular pipe, where each module

  • receives 2 new lines
  • writes one low-pass row to output
  • writes high-pass line to buffer at pipe tail
  • discard two oldest scanlines

• Buffer size: 2MP output DWT + ɚLP input pels

• Example: full page 600 ppi: 33.6Msamples, while a 9/7-tap 5 stage requires only 255K samples

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