“Image Resolution Conversion Method Using Spatial Scalability”

Takaaki Ishikawa, Hiroshi Watanabe

    Research output: Contribution to journalArticlepeer-review


    Recently, the importance of SNR and spatial scalability in image coding has been increased. JPEG 2000 has advanced SNR and spatial scalability functions. However, the spatial scalability of JPEG 2000 is limited to the cases where decimated resolutions are 1/22 of the source image resolution. Therefore, Digital-Cinema resolution cannot be converted to SDTV or QVGA size image by decoding the JPEG 2000 bitstream directly. We propose a resolution conversion method using spatial scalability, which combines LL sub-band with a decimation filter. Experimental results confirm an improvement in PSNR of 1-2 dB as compared to conventional resolution conversion methods.

    Original languageEnglish
    Pages (from-to)548-557
    Number of pages10
    JournalJournal of the Institute of Image Electronics Engineers of Japan
    Issue number5
    Publication statusPublished - 2005 Jan 1


    • Digital Cinema
    • JPEG 2000
    • Resolution conversion
    • Spatial scalability

    ASJC Scopus subject areas

    • Computer Science (miscellaneous)
    • Electrical and Electronic Engineering


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