Digitizing of Analogue Data-Charts from Thermohygrographs

Uproszczony widok
dc.contributor.authorRadon, Jan
dc.date.accessioned2021-07-15T10:29:51Z
dc.date.available2021-07-15T10:29:51Z
dc.date.issued2017
dc.description.abstractA thermo-hygrograph is a chart recorder that measures and records both temperature and humidity in an analogue form. Converting the results into digital form is necessary to enhance evaluation of measurements archived on paper charts. Coordinate system of the charts is different than common Cartesian rectangular axis. Temperature and relative humidity axis are curved according to recorder pen holder ray. Different chart types, depending on particular thermohygrograph model, were used so far. In every case, however, the axis grid depicted in the background is geometrically precisely defined. So pattern recognition techniques could be used to find its location automatically. Temperature and relative humidity patterns can be retrieved automatically assuming that the color group of plotted lines is different than the background including the grid. Due to storing conditions, manual descriptions, discoloration and other factors, the plotted pattern cannot be unambiguously identified. Many randomly scattered pixels are interpreted as being part of a plotted line. Among additional measures, like excluding particular areas from analysis, manually removing and including points, a vector analysis of retrieved courses makes digitizing more effective.en_EN
dc.identifier.citationRadon, J. (2017). Digitizing of Analogue Data-Charts from Thermohygrographs. Journal of Applied Computer Science, 25(1), 49-60. https://doi.org/10.34658/jacs.2017.1.49-60
dc.identifier.doihttps://doi.org/10.34658/jacs.2017.1.49-60
dc.identifier.doi10.34658/jacs.2017.1.49-60
dc.identifier.issn1507-0360
dc.identifier.urihttp://hdl.handle.net/11652/3875
dc.identifier.urihttps://doi.org/10.34658/jacs.2017.1.49-60
dc.language.isoenen_EN
dc.page.numbers. 49-60
dc.publisherWydawnictwo Politechniki Łódzkiejpl_PL
dc.publisherLodz University of Technology Pressen_EN
dc.relation.ispartofJournal of Applied Computer Science, Vol. 25, No. 1, Wydawnictwo Politechniki Łódzkiej, Łódź 2017, ISSN 1507-0360.
dc.rightsFair use conditionen_EN
dc.rightsDla wszystkich w zakresie dozwolonego użytkupl_PL
dc.rights.licenseLUT Licenseen_EN
dc.rights.licenseLicencja PŁpl_PL
dc.subjectthermohygrograph charten_EN
dc.subjectdigitizingen_EN
dc.subjectsoftware algorithmen_EN
dc.subjectwykres termohigrograficznypl_PL
dc.subjectdigitalizacjapl_PL
dc.subjectalgorytm oprogramowaniapl_PL
dc.titleDigitizing of Analogue Data-Charts from Thermohygrographsen_EN
dc.typeArtykułpl_PL
dc.typeArticleen_EN

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2017, Tom 25 Nr 1