{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,4,5]],"date-time":"2026-04-05T19:48:07Z","timestamp":1775418487740,"version":"3.50.1"},"reference-count":42,"publisher":"MDPI AG","issue":"1","license":[{"start":{"date-parts":[[2020,1,6]],"date-time":"2020-01-06T00:00:00Z","timestamp":1578268800000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100010198","name":"Ministerio de Econom\u00eda, Industria y Competitividad, Gobierno de Espa\u00f1a","doi-asserted-by":"publisher","award":["TEC2016-76021-C2-2-R"],"award-info":[{"award-number":["TEC2016-76021-C2-2-R"]}],"id":[{"id":"10.13039\/501100010198","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100003176","name":"Ministerio de Educaci\u00f3n, Cultura y Deporte","doi-asserted-by":"publisher","award":["CAS17-00216"],"award-info":[{"award-number":["CAS17-00216"]}],"id":[{"id":"10.13039\/501100003176","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Sensors"],"abstract":"<jats:p>The relationship between wood and its degree of humidity is one of the most important aspects of its use in construction and restoration. The wood presents a behavior similar to a sponge, therefore, moisture is related to its expansion and contraction. The nondestructive evaluation (NDE) of the amount of moisture in wood materials allows to define, e.g., the restoration procedures of buildings or artworks. In this work, an integrated study of two non-contact techniques is presented. Infrared thermography (IRT) was able to retrieve thermal parameters of the wood related to the amount of water added to the samples, while the interference pattern generated by speckles was used to quantify the expansion and contraction of wood that can be related to the amount of water. In twenty-seven wooded samples, a known quantity of water was added in a controlled manner. By applying advanced image processing to thermograms and specklegrams, it was possible to determine fundamental values controlling both the absorption of water and the main thermophysical parameters that link the samples. On the one hand, results here shown should be considered preliminary because the experimental values obtained by IRT need to be optimized for low water contents introduced into the samples. On the other hand, speckle interferometry by applying an innovative procedure provided robust results for both high and low water contents.<\/jats:p>","DOI":"10.3390\/s20010316","type":"journal-article","created":{"date-parts":[[2020,1,6]],"date-time":"2020-01-06T10:34:46Z","timestamp":1578306886000},"page":"316","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":21,"title":["Measuring the Water Content in Wood Using Step-Heating Thermography and Speckle Patterns-Preliminary Results"],"prefix":"10.3390","volume":"20","author":[{"given":"Francisco J.","family":"Madruga","sequence":"first","affiliation":[{"name":"Photonics Engineering Group, CIBER-BBN and IDIVAL, Universidad de Cantabria, Plaza de la Ciencia s\/n, 39005 Santander, Cantabria, Spain"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-9354-4650","authenticated-orcid":false,"given":"Stefano","family":"Sfarra","sequence":"additional","affiliation":[{"name":"Department of Industrial and Information Engineering and Economics (DIIIE), University of L\u2019Aquila, Piazzale E. Pontieri, no. 1, I-67100 L\u2019Aquila (AQ), Italy"}]},{"given":"Stefano","family":"Perilli","sequence":"additional","affiliation":[{"name":"Department of Industrial and Information Engineering and Economics (DIIIE), University of L\u2019Aquila, Piazzale E. Pontieri, no. 1, I-67100 L\u2019Aquila (AQ), Italy"}]},{"given":"Elena","family":"Pivar\u010diov\u00e1","sequence":"additional","affiliation":[{"name":"Faculty of Environmental and Technology Manufacturing, Technical University in Zvolen, Ul. T.G. Masaryka 2174\/24, 960 53 Zvolen, Slovakia"}]},{"given":"Jos\u00e9 M.","family":"L\u00f3pez-Higuera","sequence":"additional","affiliation":[{"name":"Photonics Engineering Group, CIBER-BBN and IDIVAL, Universidad de Cantabria, Plaza de la Ciencia s\/n, 39005 Santander, Cantabria, Spain"}]}],"member":"1968","published-online":{"date-parts":[[2020,1,6]]},"reference":[{"key":"ref_1","unstructured":"Madruga, F.J., Lombillo, I., Elices, J., Conde, O., Lia\u00f1o, C., Villegas, L.M., and Higuera, J.M.L. (2011, January 15\u201317). La termograf\u00eda infrarroja aplicada a la rehabilitaci\u00f3n del patrimonio: Experiencias pr\u00e1cticas en el Seminario Mayor de Comillas. 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