
event camera

event camera, jyala neuromorphic camera, silicon retina kinwa dynamic vision sensor asehi mhanatat, haah eka imaging sensor aahe joou chamkatil sthanik badalanna pratisad deto. event camerey paramparik (frame) cameanpramane shuttercha vapar karoon pratima ghet naheet. tyaeivaji, event cameatyatil pratyek pixel swatantrapane aanee atulyakalikpane karya karate, jasjase chamak badalate tasatase badal nondavate aanee anyatha gup rahate.
karyatmak varnan.
event camera pixel heey chamak badalanna swatantrapane pratisad detat. pratyek pixel sandarbh chamak patali sanchayit karato aanee satat tyachi tulana sadhyachya chamak patalishi karato. jarr tejatil farak thresholdpeksha jaast asel tarr too pixel tyachi sandarbh patali punha seet karato aanee eka ghatana nirman karatoh eka swatantra packett jyamadhye pixel patta aanee timestamp asato. ghatananmadhye chamak badalanchi dhruviyata (vaadh kinwa ghat) kinwa prakashachya pataliche tatkal mojmap dekhil asoo shakate. asha prakare, ghatana camerey drushyachya prakashatil badalanmule udbhavananya ghatanancha eka atulyakalik pravah tayar karatat.event cameanmadhye microsecond temporal resolution, 120 dii. bii. dynamic rainz aanee frame cameianpeksha qamee under/overexposure aanee motion blur asate. yamule tyanna vastoo aanee cameachya halchalicha (optical pravah) adhik achookpane magova gheta yeto. teey dhusar-praman mahitee detat. suruvatila (2014), resolution 100 pixalparyant maryadit hote. nantarchi nond 2019 madhye 640x480 resolutionparyant pohochali. kaaran vaiyaktik pixel swatantrapane phayar karatat, event camerey neuromorphic computingsarkhya atulyakalik sanganakeey sanrachanesah ekikaranasathi yogya disatat. pixelche swatantrya yaa cameanna tyanchya palikade sarasari naan karata chamakdar aanee mand prakash asalelya bhaganchya drushyancha samna karnyas anumati dete.
prakar.
tatpurte contrast sensors (jase qee dii. vhee. ess. (dynamic vision sensor) kinwa ess. dii. vhee. ess. (sensitive-dii. vhee. ess.)) asha ghatana nirman karatat jyaa dhruviyata (tejat vaadh kinwa ghat) darshavtat, tarr tatpurte pratima sensors pratyek ghatanesah tatkal tivrata darshavtat. devismadhye (dynamic aanee active-pixel vision sensor) dynamic vision sensor (dvs) vyatirikt global shutter active pixel sensor (aps) asato joou samaan photosensor arrey samayik karato. asha prakare, tyat ghatananchya bajoone pratima chaukati tayar karanyachi kshamata aahe. anek ghatana cameanmadhye atiriktapane jadatviy mapan ekak (aay. emm. yuu.) asate.
retinomorphic sensors.
event sensorscha aanakhi eka varg mhanje tathakathit 'retinomorphic' sensors. samanyatah event sensorsche varnan karnyasathi retinomorphic haah shabd vaparla gela asala taree, 2020 madhye too maliketil pratirodhak aanee prakashsanvedanshil capacitorvar aadharit vishisht sensor designche naav mhanoon swikarla gela. heey capacitor saur urja sathavanyasathi vaparlya jaanarya photokepesitarpeksha vegale aahet aanee tyaeivaji prakashakhali capacitance badalanyasathi tyanchi rachana kelee aahe. capacitance badalalyavar teey kinchit charge/discharge karatat, parantu anyatha teey samatolat rahatat. jevha prakashsanvedanshil capacitor resisters maliket thewala jaato aanee sampoorn circuitmadhe input voltage lagoo kele jaate, tevha parinam eka sensor asato joou prakashachi tivrata badalate tevha voltage output karato, parantu anyatha hott nahee.
itar ghatana sanvedkanchya (samanyatah photodiode aanee itar kahee paripath ghatak) ulat, heey sanvedak swabhavikpane sanket tayar karatat. tyamule teey eka asey upkaran manale jaau shakate jeey itar ghatana cameanmadhil lahan paripathasarkhech parinam dete. retinomorphic sensorscha abhyas aataparyant keval sanshodhan vatavaranat keela gela aahe.
algoridam.
pratima punarbandhani.
ghatananmadhil pratimechya punarbandhanimadhye uchch gatishil shreni, uchch tatpurte resolution aanee qamee gatee aspashtatesah pratima aanee video tayar karanyachi kshamata aahe. tatpurte smoothing vaparoon pratimechi punarrachana sadhya kelee jaau shakate, udaa.jee. uchch-paas kinwa purak filter. paryayi paddhatinmadhye optimization aanee gradient andaj aanee tyanantar poison ekikaran yancha samavesh hoto.
avkashiy aakunchan.
sthanik ghatana-chalit convolution sankalpana 1999 madhye (dvsporvi) gruheet dharali gelee hotee, parantu nantar eu prakalp cavier darmyan (jyaa darmyan dvscha shodh lagla hota) ghatana-darr-ghatana eventchya samanvayat eka aniyantrit convolution curnell integrate-andd-phayar pixelchya shreneet prakshepit karoon samanyikrut kele gele. bahu-curnell event-chalit convolution vistar event-chalit sakhol convolutional neural networksathi parvanagi deto.
gatee shodhane aanee magova ghene.
event cameane pahilelya halana vastunche vibhajan aanee shodhane heey eka kshullak kaam vatoo shakate, kaaran teey chipwar asalelya sensardware kele jaate. tathapi, hii kaame katheen aahet, kaaran karyakramanmadhye qamee mahitee asate aanee tyat pott aanee rung yasarkhi upayukt drushya vaishishtye nasatat. halana cameala pahata hii kaame aanakhi aavhanatmak banatat, kaaran pratima pratalavar sarvatra ghatana ghadatat, jyaa halana vastoo aanee sthir drushyadvare tayar hotat (jyachi spasht gatee cameachya ahankar-gatimule prerit hote). yaa samasyeche nirakaran karnyachya alikadil kahee paddhatinmadhye gatee-nuksan bharpai models aanee paramparik clustering algoridamcha samavesh aahe.
sambhavya anuprayog.
sambhavya anuprayoganmadhye vastoo olakhane, swayatt vahane aanee yantramanav yancha samavesh hoto. amerikechya lashkarane infrared aanee itar event cameancha vichar keela aahe kaaran tyancha veej vapar qamee aahe aanee ushnata nirmiti qamee jhaali aahe.