The Collaborative Evaluation Method of Coded Picture Quality Using the Internet

Seiichiro Hangai, Takayuki Hamamoto, Hidetaka Takano

Research output: Contribution to journalArticle


In order to avoid tiresome and tedious evaluation of coded pictures, collaborative subjective evaluation method using Internet is newly proposed. Except for observation conditions, evaluating environment including evaluation time, picture presentation sequence and evaluation word is matched with that of ITU-R recommendation. Experiments open to the students in our university was continued for 4 months on the Internet to get 100 voluntary testers. According to experimental result using 14 coded pictures, the order of pictures sorted by the collaborative MOS agreed with that by the MOS of the ITU-R recommendation when 60 voluntary testers collaborated. It was also found that we could predict the MOS of the ITU-R recommendation from the collaborative MOS wilh 80 voluntary testers or more.

Original languageEnglish
Pages (from-to)743-746
Number of pages4
JournalKyokai Joho Imeji Zasshi/Journal of the Institute of Image Information and Television Engineers
Issue number5
Publication statusPublished - 1 Jan 2000



  • Image quality
  • Internet
  • MOS
  • WSNR

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