area–perimeter ratio

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• Published Subscription Original Research Special issue 1 May 2026

  Non-Contact Quantification of Swelling-Induced Deformation in Polymer Hydrogels Using Image Analysis

  By R. Arangasamy, C. Sridhathan, Mohandass G., B. Ram Priya, N.M.G. Kumar, D. Harika

  Abstract: Swelling of polymer hydrogels governs transport, mechanics, and functional performance in biomedical systems, yet it is often reported using bulk ratios that conceal spatially heterogeneous deformation and boundary-driven instabilities. This study presents a non-contact image-analysis framework to quantify swelling-induced deformation by tracking shape and boundary evolution from time-lapse imaging. The approach segments the hydrogel region, extracts a sub-pixel refined contour, and computes boundary displacement descriptors including mean and upper-percentile normal …

  Published in Journal of Polymer & Composites · Vol. 14, Issue 2, 2026 · pp. 1499–1509 Read article →