Nokho, lo mbuzo unengqondo kodwa awunayo impendulo elula. Kunezici eziningi kakhulu ezingathinta imiphumela, njengokuncishiswa kwezimo zezulu ezahlukene, ukuzwela kwe-thermal detector, i-algorithm yokuthwebula izithombe, imisindo ye-dead-point kanye ne-back ground, kanye nomehluko wokushisa kwangemuva okuqondiwe. Isibonelo, i-cigarette butt ibonakala ngokucacile kunamaqabunga esihlahleni esisebangeni elifanayo noma ngabe incane kakhulu, ngenxa yomehluko wokushisa kwangemuva okuqondiwe.
Ibanga lokuthola liwumphumela wokuhlanganiswa kwezinto ezithinta umuntu kanye nezinto ezithinta umuntu. Lihlobene ne-psychology yokubona yombukeli, okuhlangenwe nakho kwakhe kanye nezinye izinto. Ukuze siphendule ngokuthi “ikhamera yokushisa ingabona kude kangakanani”, kumelwe sithole ukuthi kusho ukuthini kuqala. Isibonelo, ukuthola ithagethi, kuyilapho u-A ecabanga ukuthi angayibona kahle, u-B angase angakuboni. Ngakho-ke, kumele kube nendinganiso yokuhlola eqondene nombono kanye nehlanganisiwe.
Izindinganiso zikaJohnson
UJohnson waqhathanisa inkinga yokubona amehlo nama-line pair ngokusho kokuhlolwa. I-line pair ibanga elingaphansi kokukhanya okuhambisanayo kanye nemigqa emnyama emkhawulweni wobukhali bokubona bombukeli. I-line pair ilingana nama-pixel amabili. Izifundo eziningi zikhombisile ukuthi kungenzeka ukunquma ikhono lokubona ithagethi lesistimu yesithombe se-infrared thermal ngokusebenzisa ama-line pair ngaphandle kokucabangela uhlobo lwe-target kanye namaphutha esithombe.
Isithombe sethagethi ngayinye endizeni egxile sithatha amaphikseli ambalwa, angabalwa kusukela kusayizi, ibanga eliphakathi kwethagethi kanye nesithombe esishisayo, kanye nensimu yokubuka esheshayo (IFOV). Isilinganiso sosayizi wethagethi (d) nebanga (L) sibizwa ngokuthi i-aperture angle. Singahlukaniswa yi-IFOV ukuthola inani lamaphikseli ahlala esithombeni, okungukuthi, n = (D / L) / IFOV = (DF) / (LD). Kungabonakala ukuthi uma ubude be-focal bukhulu, amaphuzu aphezulu ahlala esithombeni esiqondisiwe. Ngokusho kwe-Johnson criterion, ibanga lokuthola lide kakhulu. Ngakolunye uhlangothi, uma ubude be-focal bukhulu, i-field angle incane, futhi izindleko zizoba phezulu.
Singabala ukuthi isithombe esithile sokushisa singabona kude kangakanani ngokusekelwe ezinqumweni ezincane ngokusho kwe-Johnson's Criteria yilezi:
Ukutholwa – into ikhona: 2 +1/-0.5 pixels
Ukuqashelwa – uhlobo lwento lungabonakala, umuntu uma kuqhathaniswa nemoto: amaphikseli angu-8 +1.6/-0.4
Ukuhlonza – into ethile ingabonakala, owesifazane vs. indoda, imoto ethile: amaphikseli angu-12.8 +3.2/-2.8
Lezi zilinganiso zinikeza amathuba angu-50% okuthi umbukeli ahlukanise into ezingeni elibekiwe.
Isikhathi sokuthunyelwe: Novemba-23-2021