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    Space-variant video compression and processing in digital holographic microscopy sensor networks with application to potable water monitoring


    Pitkäaho, Tomi and Pitkäkangas, Ville and Niemelä, Mikko and Rajput, Sudheesh K. and Nishchal, Naveen K. and Naughton, Thomas J. (2018) Space-variant video compression and processing in digital holographic microscopy sensor networks with application to potable water monitoring. Applied Optics, 57 (22). E190-E198. ISSN 1559-128X

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    Abstract

    Water-related diseases affect societies in all parts of the world. Online sensors are considered a solution to the problems associated with laboratory testing in potable water. One of the most active research areas of such online sensors has been within optics. Digital holographic microscopy (DHM) has the potential to rival state-of-the-art techniques such as advanced turbidity measurement. However, its use as an online sensor is limited by the large data requirements typical for digital holographic video. In this paper, we provide a solution that permits DHM to be applied to a whole class of online remote sensor networks, of which potable water analysis is one example. The designed sensors incorporate a novel space-variant quantization algorithm to preprocess each frame of a video sequence before transmission over a network. The system satisfies the generally accepted requirements of an online system: automated, near real-time, and operating in a real environment. To verify the effectiveness of the design, we implemented and evaluated it in an active potable water facility.

    Item Type: Article
    Keywords: Digital holography; Three-dimensional image processing; Three-dimensional microscopy;
    Academic Unit: Faculty of Science and Engineering > Computer Science
    Faculty of Science and Engineering > Research Institutes > Hamilton Institute
    Item ID: 12377
    Identification Number: https://doi.org/10.1364/AO.57.00E190
    Depositing User: Thomas Naughton
    Date Deposited: 07 Feb 2020 16:21
    Journal or Publication Title: Applied Optics
    Publisher: Optical Society of America
    Refereed: Yes
    URI:

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