20.500.12556/DKUM-72617 Estimating the size of plants by using two parallel views Ocenjevanje velikosti rastlin s pomočjo dveh vzporednih pogledov This paper presents a method of estimating the size of plants by using two parallel views of the scene, taken by a common digital camera. The approach relays on the principle of similar triangles with the following constraints: the resolution of the camera is known; the object is always in parallel to the camera sensor and the intermediate distance between the two concessive images is available. The approach was first calibrated and tested using one artificial object in a controlled environment. After that real examples were taken from agriculture, where we measured the distance and the size of a vine plant, apple and pear tree. By comparing the calculated values to measured values, we concluded that the average absolute error in distance was 0.11 m or around 3.7 %, and the absolute error in high was 0.09 m or 4.6 %. V delu je opisana metoda za ocenjevanje velikosti rastlin s pomočjo dveh vzporednih pogledov na isto sceno, zajetih s pomočjo digitalne kamere. Postopek temelji na principu podobnih trikotnikov z naslednjimi omejitvami: znani so podatki o ločljivosti uporabljene kamere; opazovani predmet je vedno vzporeden s senzorjem kamere; znan je podatek o vmesni razdalji med dvema korakoma zajema podatkov. Prvi korak v delu opisuje umerjanje metode ob pomoči umetnega predmeta v nadzorovanih pogojih. Drugi korak pa opisuje uporabo postopka na realnih primerih iz področja kmetijstva, kjer je bila ocenjena velikost vinske trte, jablane in hruške. Ob primerjavi dobljenih podatkov z izmerjenimi je bilo ugotovljena absolutna napaka v razdalji do predmetov v velikosti 0,11 m, oz. 3,7 % glede na celotno oddaljenost, absolutna napaka v velikosti v obsegu 0,09 m oz. 4,6 %. digital image processing size digital camera pixels similar triangles digitalno procesiranje slik velikost digitalna kamera slikovni elementi podobni trikotniki true true true Angleški jezik Slovenski jezik Znanstveno delo 2018-10-10 12:34:43 2018-10-10 12:36:28 2022-08-01 22:54:33 2019-07-11 19:24:56 2017 0 0 str. 1-7 št. 1/2 Letn. 14 December 2017 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 1580-8432 77:58:004.9 116855808 4480044 10.1515/agricultura-2017-0012 1580-8432 URN:SI:UM:DK:Z2NKDIRL Agricultura_2017_Videc,_Rakun_Estimating_the_size_of_plants_by_using_two_parallel_views.pdf Agricultura_2017_Videc,_Rakun_Estimating_the_size_of_plants_by_using_two_parallel_views.pdf 1 48FFDE6106D7F1F35BFBD2042C37D72D 5b2e080d57980a82240a727c46e057507468eb2f4fd7d2c283ac532883274bb2 7571973b-7c10-11eb-bb7a-00155d0001ca 20.500.12556/dkum/dac96c92-22b7-4518-b8d7-507bf086e155 https://dk.um.si/Dokument.php?lang=slv&id=130861 http://content.sciendo.com/view/journals/agricultura/14/1-2/article-p1.xml 1 https://dk.um.si/Dokument.php?lang=slv&id=130860 Fakulteta za kmetijstvo in biosistemske vede Agricultura 0 0 0