Importance Coding in JPEG2000 Based on Importance Measures
Deng Jiaxian · Journal of Circuits and Systems · 2003
A method is proposed for using Image Importance Measure in the new international standard JPEG2000 for still image coding. The kernel algorithms in JPEG2000 are DWT and EBCOT. EBCOT is comprised of Tier1 encoder and Tier2 encoder. Tier2 is responsible for the organization of the code stream. According to specific requirement, the code-stream can be organized in different ways. As for the JPEG2000 standard, importance measure is a good choice. The importance measure is computed using the coefficients in the wavelet domain and the pixel values. Importance measure is then used to organize the code stream to the JPEG2000 format. Such encoded code stream can be decoded by means of JPEG2000 decoder.