Izici eziyisisekelo zesithwebuli somunwe ukuthola isithombe somunwe

Isithwebuli somunwe sithola isithombe somunwe nge-sensor yeminwe. Ngoba isithombe somunwe se-Fingerprint singokwabumfihlo somuntu siqu, uhlelo lokuqashelwa kweminwe oluzenzakalelayo ngokuvamile alugcini ngokuqondile isithombe somunwe. I-algorithm yokuqashelwa yeminwe ngokuvamile ikhipha futhi iqhathanisa izici zeminwe kusuka esithombeni somunwe. Siqukethe ama-ridges nezigodi. Ama-ridge abizwa nangokuthi imigqa, ehambelana nezingxenye eziphakanyisiwe zesikhumba somunwe, futhi ivele njengemigqa nge-grawral grayscale esithombeni somunwe. Izigodi zihambelana nezingxenye zemihlabe yesikhumba somunwe, ezihlanganiswe phakathi kwemivimbo emibili, i-greyscale yemigqa ehlukahlukene iyabonakala, futhi izici zeminwe zingahlukaniswa izici zomhlaba, izici zasendaweni nezici ezicashile.

1. Izici zomhlaba zihlanganisa
1. Iphethini eyisisekelo yokusanhlamvu: Iphethini eyisisekelo yokusanhlamvu imvamisa ihlukaniswe ngohlobo lwe-Left Skip, uhlobo lwe-Right Skip, uhlobo lwamabhakede, uhlobo lwe-arch kanye nohlobo lwe-arch olukhomba.
2. Indawo yemodi
Indawo yephethini yindawo esithombeni somunwe oqukethe izici ezijwayelekile, futhi uhlobo lwe-Fingerprint lungahlukaniswa endaweni yephethini.
3. Iphoyinti eliyisisekelo, iphuzu eliyisisekelo lisendaweni e-asymptotic maphakathi nephethini yeminwe, evame ukusetshenziswa njengephuzu lesethenjwa lapho lixoxa futhi liqhathanisa iminwe.
4. Iphuzu likanxantathu. I-Triangle Point yindawo ephakathi nendawo yendawo yephethini yoxantathu esithombeni somunwe. Imigqa emithathu yeminwe esondelene nephuzu yakha unxantathu wokulingana olinganiselwayo, futhi iphuzu likanxantathu lihlinzeka ngeminwe.
5. Inani lemigqa, njengesici sembulunga yonke, inani lemigqa ngokuvamile libhekisela enanini lemigqa yeminwe endaweni yamaphethini, kanti amanye ama-algorithms asebenzisa inani lemigqa phakathi kwamaphoyinti amabili njengesici somunwe, njengenombolo ye imigqa phakathi kwezindawo ezimbili.
2. Izici zendawo zifaka
1. Iphuzu lokugcina lomgwaqo liphela lapha.
2. Umgwaqo obanzi we-stripe endaweni ye-bifurcation uhlukaniswe ngemigwaqo emibili noma ngaphezulu kamugqa lapha.
3. I-Divergence Point Z6 Imigqa ehambisanayo ihlukaniswe lapha.
4. Iphuzu elingalodwa libanzi futhi umucu mfushane kakhulu, ukuze kube iphuzu.
5. Imivimbo emifushane nemichilo ebanzi imfushane kepha ayincane kangako.
6. Iphuzu lokukhala, umucu womgwaqo uhlukaniswe ngama-noodle bese wadalulwa masinyane waba munye, kwakhiwa indandatho encane ngale ndlela ibizwa ngokuthi yi-Ring Point.
7. Ibhuloho, lapho imigqa emibili ehambisanayo igcwele khona.
8. Isivinini lapho ukuqondiswa kwe-curvature yoshintsho lokuthungwa, ama-Endpoints namaphuzu yizici zeminwe ezisetshenziswa ngokukhonjwa kweminwe. Le ncwadi ibizwa ngokuthi ama-node. Izindawo zingachazwa ngamapharamitha afana nezixhumanisi, izinkomba, nezinhlobo.