Možnost izboljšanja napovedi pridelka jabolk z analizo slike z dodatnim vzorčenjem

Švagan, Vanja

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Title:	Možnost izboljšanja napovedi pridelka jabolk z analizo slike z dodatnim vzorčenjem
Authors:	ID Švagan, Vanja (Author) ID Stajnko, Denis (Mentor) More about this mentor...
Files:	UNI_Svagan_Vanja_2011.pdf (4,99 MB) MD5: 400E305134AC9C2EE417775DEFB5CEFB PID: 20.500.12556/dkum/a0354911-00d4-4375-ae56-d52021a4f649
Language:	Slovenian
Work type:	Undergraduate thesis
Organization:	FKBV - Faculty of Agriculture and Life Sciences
Abstract:	Zgodnja in natančna napoved pridelka jabolk je izjemnega pomena za organizacijo obiranja, pripravo hladilniškega prostora, odbire sadja za daljše skladiščenje in določanje prodajnih cen in poti, saj je jablana najpomembnejša sadna vrsta v Sloveniji. Leta 2009 smo na širšem sadjarskem območju Slovenije z intenzivno pridelavo jabolk izvajali poskus, v katerega so bile vključene glavne slovenske sorte jabolk: ´Braeburn´, ´Elstar´, ´Fuji´, ´Gala´, ´Idared´, ´Jonagold´ in ´Zlati delišes´. Želeli smo preveriti možnost povečanja natančnosti napovedi pridelka jabolk po metodi analize slik, v katero smo poleg prvega, rednega vzorčenja v juliju dodatno vključili še septembra. Pri izvajanju meritev smo uporabili dlančnik ASUS 565 z vgrajenim GPS sprejemnikom, ki nas je pripeljal do željenega nasada in kamero za fotografiranje dreves. Po zaključenem delu na terenu, smo s pomočjo računalniške analize slike v laboratoriju napovedali pričakovani pridelek. Dobljeni rezultati po sortah so pokazali, da je julijska napoved v povprečju podcenila pridelek za 7 %, septembrska pa ga je nasprotno precenila le še za 2 %. Septembrska napoved je pri 13 pridelovalcih od 21 v povprečju precenila pridelke le za 4 %, medtem ko ga je julijska napoved v povprečju podcenila za 9 %. Rezultati po pridelovalnih območjih so pokazali, da se je septembrska napoved v primerjavi z julijsko izboljšala na pridelovalnih območjih Slovenske gorice, Posavje in Osrednja Slovenija, saj je bila septembrska napoved v povprečju precenjena le za 6 % v primerjavi z julijsko, ki je v povprečju podcenjena za 9 %. Dobljeni rezultati so vzpodbudni, saj nam je uspelo z dodatnim vzorčenjem v septembru pri nekaterih napovedih zmanjšati razliko med napovedanim in tehtanim pridelkom pod 5 %. Kljub temu je še nekaj odstopanj, ki jih pripisujemo specifičnosti posameznih lokacij in jih z univerzalnim pristopom ni možno popolnoma opisati in zajeti v algoritem za napoved.
Keywords:	jabolka / dlančnik / GPS / vizualizacija / napoved pridelka
Place of publishing:	Maribor
Year of publishing:	2011
PID:	20.500.12556/DKUM-18084
NUK URN:	URN:SI:UM:DK:IFK6OAIZ
Publication date in DKUM:	03.05.2011
Views:	2566
Downloads:	188
Metadata:
Categories:	FKBV
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Secondary language

Language:	English
Title:	The possible apple yield forecast improvement with the image analysis with additional sampling
Abstract:	An early and exact apple yield forecast has an exceptional meaning for organization of picking, preparation of cooling rooms, selecting the fruit for longer warehouse residence and for defining selling prices and ways, because the apple tree is the most important fruit in Slovenia. In 2009 we did the experiment on the broad fruit growing area in Slovenia, which had an intensive apple harvest. The test included the main varieties of apples such as ´Braeburn´, ´Elstar´, ´Fuji´, ´Gala´, ´Idared´, ´Jonagold´ and ´Golden Delicious´. We wanted to examine the possibility of increase precision of apple yield forecast with the image analysis method in which besides samplings in July and additional one in September was included. During the examination we used a camera to capture photos of the trees and a personal digital assistant ASUS P565 with GPS receiver, which brought us to a wanted plantation. After completed fieldwork we forecasted the expected yield with the help of computer image analysis in the laboratory. The varieties results have shown that the forecast in July has undervaluated the yield for 7 % but has even overvaluated it for 2 % in September. The September forecast has on average overvaluated the yield only for 4 % by 13 producers out of 21, meanwhile the July forecast has undervaluated it for 9 %. The gained results on the harvesting areas have shown that the forecast in September in comparison to the forecast in July has improved in Slovenske gorice, Posavje, and in central Slovenia. The forecast for September was on average overvaluated only for 6 % in comparison to the forecast in July, which is on average undervaluated for 9 %. The gained results are promising because with the additional sampling in September we have managed to reduce the difference under 5 % between the forecast of the yield and the actual weight of the yield. In spite of all there are still some deviations which are attributed to some specific areas and cannot be described and captured to the forecast with the universal algorithm.
Keywords:	apples / personal digital assistant / GPS / visualization / yield forecast

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