Real-time measurement of interfacial tension by image processing

Hiroyasu Sakamoto, Akihiro Murao, Yoshiteru Hayami

    Research output: Contribution to journalArticlepeer-review

    40 Citations (Scopus)


    This paper describes a method for constructing a precision online real-time measuring system of the interfacial tension of fluids by analyzing images of the fluids' drop shape interface. The measurement is based on MMSE fitting of a solution curve of Young-Laplace ordinary differential equations onto an observed drop curve. The system showed higher accuracy and efficiency than previously reported ones because we have introduced in our system a new method of detecting drop shape with sub-pixel accuracy and a Levenber-Marquardt-Morrison method of nonlinear optimization. In addition, we have proposed a new method of evaluating curve fitting error. Our method presents an effectual and precise means of analyzing time dependent phenomena in various fluids' interfaces through observing interfacial tension.

    Original languageEnglish
    Pages (from-to)1643-1650
    Number of pages8
    JournalKyokai Joho Imeji Zasshi/Journal of the Institute of Image Information and Television Engineers
    Issue number10
    Publication statusPublished - Oct 2002

    All Science Journal Classification (ASJC) codes

    • Media Technology
    • Computer Science Applications
    • Electrical and Electronic Engineering


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