JPEG-2000

• ISO/IEC International Standard 15444: Information technology - JPEG-2000 Image Coding System

• based on wavelet coding in opposition to JPEG which was based on DCT coding:
  
  
  

  
  
  

  PP - pre-processing	WT - wavelet transform	CP - codeblock partition
  Q - quantization	EC - entropy coding	RA - rate allocation

  
  

• performs better than JPEG when very high compression ratio is needed and for images containing textual data but not intended to replace JPEG standard

• combines lossy and lossless coding in one scheme, so progressive transmission from very coarse up to original image is possible

• region of interests (more important parts of the image) can be defined