CNN

Cibiyar Sadarwar Jijiya ta Juyin Halitta

CNN ita ce gajarta Cibiyar Sadarwar Jijiya ta Juyin Halitta.

Mene ne Cibiyar Sadarwar Jijiya ta Juyin Halitta?

Wani nau'i na ƙirar ilmantarwa mai zurfi da aka fara amfani da shi don nazari da sarrafa bayanan gani, kamar hotuna da bidiyo. An ƙirƙira su don yin kwaikwayi hanyar tsarin bawo na gani na ɗan adam da kuma gane alamu a cikin abubuwan da ke gani. CNNs suna da tasiri musamman a ayyuka kamar rarraba hoto, gano abu, da rarrabuwa.

Tsarin gine-ginen CNN yawanci ya ƙunshi yadudduka da yawa, gami da:

  1. Layer shigarwa: Wannan Layer yana karɓar ɗanyen bayanan hoto, galibi ana wakilta azaman matrix na ƙimar pixel.
  2. Yadudduka na juyin juya hali: Waɗannan yadudduka suna yin aikin jujjuyawar, wanda ya haɗa da yin amfani da tacewa da yawa (wanda ake kira kernels) zuwa bayanan shigarwa. Masu tacewa suna taimakawa gano fasali kamar gefuna, laushi, da siffofi a cikin hoton. Fitowar Layer mai jujjuyawa saitin taswirori ne, waɗanda ke wakiltar abubuwan da aka gano a ma'auni da daidaitawa daban-daban.
  3. Yadukan kunnawa: Waɗannan yadudduka suna amfani da aikin kunnawa mara-daidaitacce, kamar Sashin Lantarki Mai Gyara (Rectified Linear Unit).ReLU), zuwa fitowar matakan juyin juya hali. Ayyukan kunnawa yana gabatar da rashin daidaituwa, yana barin CNN ta koyi hadadden tsari da dangantaka a cikin bayanai.
  4. Yadukan ruwa: Waɗannan yadudduka suna aiwatar da ayyukan rage ƙima, waɗanda ke taimakawa rage girman sararin samaniya da ƙirƙira ƙididdiga na taswirar fasalin yayin adana mahimman bayanai. Ayyukan hada-hadar gama-gari sun haɗa da max-pooling da matsakaita pooling.
  5. Cikakken haɗin yadudduka: Wadannan yadudduka suna haɗa kowane neuron a cikin Layer ɗaya zuwa kowane neuron a cikin Layer na gaba, wanda ke bawa CNN damar koyon manyan matakai da alaƙa. Layer na ƙarshe da aka haɗa cikakke yawanci yana biye da aikin kunnawa softmax, wanda ke samar da yuwuwar fitarwa ga kowane aji a cikin aikin rarrabuwa.
  6. Layer na fitarwa: Wannan Layer yana haifar da hasashen ƙarshe ko fitarwa na CNN, kamar lakabin aji a cikin aikin rarraba hoto.

Horar da CNN ya ƙunshi daidaita ma'aunin tacewa da son zuciya ta hanyar tsarin da ake kira backpropagation, wanda ke rage kuskure tsakanin abubuwan da aka annabta da ainihin alamun. Da zarar an horar da su, za a iya amfani da CNN don yin tsinkaya akan sababbin bayanan da ba a gani ba.

CNNs sun yi nasara a ayyuka daban-daban na hangen nesa na kwamfuta, gami da rarrabuwar hoto (misali, ImageNet), gano abu (misali, YOLO, Mai Saurin R-CNN), da ɓangaren ma’ana (misali, U-Net). Tasirin su a cikin sarrafa bayanan gani ya kuma sa su dace da wasu yankuna kamar sarrafa harshe na halitta da fahimtar magana, inda za a iya amfani da su don nazarin bayanan jeri.

  • Gajarta: CNN
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