I-NDVI (iNormalized Difference Vegetation Index) sisalathisi esisetyenziswa rhoqo ekulinganiseni nasekujongeni impilo kunye namandla ezityalo. Sibalwa kusetyenziswa imifanekiso yesathelayithi, elinganisa ubungakanani bokukhanya okubonakalayo nokukufutshane ne-infrared okubonakaliswa zizityalo. I-NDVI ibalwa kusetyenziswa ii-algorithms ezikhethekileyo ezisetyenziswa kwidatha efunyenwe kwimifanekiso yesathelayithi. Ezi algorithms ziqwalasela ubungakanani bokukhanya okubonakalayo nokukufutshane ne-infrared okuboniswa zizityalo, kwaye zisebenzisa olu lwazi ukuvelisa isalathisi esinokusetyenziswa ukuvavanya impilo kunye nemveliso yezityalo. Nangona kunjalo, ezinye iinkampani zithengisa iikhamera ze-NDVI okanye ii-sensors ezinokuncamathiselwa kwiidrone okanye kwezinye izithuthi zasemoyeni ukuze zibambe imifanekiso ye-NDVI enesisombululo esiphezulu. Ezi khamera zisebenzisa izihluzo ezikhethekileyo ukuze zibambe ukukhanya okubonakalayo nokukufutshane ne-infrared, okunokuthi emva koko kucutshungulwe kusetyenziswa ii-algorithms ze-NDVI ukuvelisa iimephu ezineenkcukacha zempilo kunye nemveliso yezityalo.
Iilensi ezisetyenziselwa iikhamera ze-NDVI okanye iisensa zihlala zifana neelensi ezisetyenziselwa iikhamera okanye iisensa eziqhelekileyo. Nangona kunjalo, zinokuba neempawu ezithile zokuphucula ukubanjwa kokukhanya okubonakalayo nokukufutshane ne-infrared. Umzekelo, ezinye iikhamera ze-NDVI zingasebenzisa iilensi ezine-coating ethile ukunciphisa ubungakanani bokukhanya okubonakalayo okufikelela kwisensa, ngelixa zonyusa ubungakanani bokukhanya okukufutshane ne-infrared. Oku kunokunceda ukuphucula ukuchaneka kokubalwa kwe-NDVI. Ukongeza, ezinye iikhamera ze-NDVI zingasebenzisa iilensi ezinobude obuthile be-focal okanye ubungakanani be-aperture ukuze ziphucule ukubanjwa kokukhanya kwi-spectrum ekufutshane ne-infrared, nto leyo ebalulekileyo ekulinganisweni kwe-NDVI ngokuchanekileyo. Ngokubanzi, ukukhethwa kwelensi yekhamera ye-NDVI okanye i-sensa kuya kuxhomekeka kwisicelo esithile kunye neemfuno, ezifana nesisombululo sendawo esifunekayo kunye nobubanzi be-spectral.
Iphelile kwisitokhwe
Ngaphambili: Iilensi zeekhamera zeStarlight Okulandelayo: Iilensi zokuQonda i-Iris