Interaktivno branje padavinskih grafov

Sušin, Nejc (author), Peer, Peter (mentor)

V tem delu je predstavljen interaktivni program, ki omogoča digitalizacijo padavinskih grafov. Program sprejme sliko optično prebranega papirnatega traku z narisanim grafom, rezultat pa so intenzitete padavin v izbranem časovnem intervalu. Temelji na avtomatskem postopku detekcije, ki mu lahko pomagamo s prilagajanjem parametrov ali pa zaznano krivuljo ročno popravimo. Med glavnimi metodami za popravljanje so označevanje območja, ki ga želimo izpustiti iz obravnave, dodajanje točk inverzije ter ročno risanje krivulje. S pomočjo interaktivnega programa je bilo obdelanih 58 padavinskih grafov, rezultati pa primerjani z uradnimi podatki z Agencije Republike Slovenije za okolje (ARSO). Interaktivnost dokazano omogoča obdelavo širšega spektra padavinskih grafov ter izboljša rezultate avtomatskega postopka.

• Language: Unknown
• Keywords: padavinski graf, računalniški vid, digitalizacija
• Work type: Bachelor thesis/paper
• Organization: FRI - Faculty of Computer and Information Science
• Year: 2015
• PID: 20.500.12556/RUL-72611
• COBISS.SI-ID: 1536556483
• Publication date in RUL: 29.09.2015

Secondary language

• Language: Unknown
• Title: Interactive reading of rainfall graphs

Abstract

An interactive program for the digitalization of rainfall charts is presented. A curve is extracted from a scanned picture of a paper strip and the intensity of rainfall is read at a given time interval. The program allows us to modify the parameters and manually correct the results of an automatic rainfall chart reading algorithm, upon which the interactive system is based. The main methods used to correct the readings are selecting an area to be excluded from further analysis, adding inversion points and manually drawing the curve. Using this interactive program, 58 rainfall charts were processed and the results were compared to those of the Environmental Agency of the Republic of Slovenia. We proved that the interactivity allows a wider spectrum of charts to be processed and gives more accurate results than the automatic procedure.

• Keywords: rainfall chart, computer vision, digitalization