I = rgb2gray(RGB) imasintha chithunzi cha truecolor RGB kukhala chithunzi cha grayscale I. Ntchito ya rgb2gray imatembenuza zithunzi za RGB kukhala zotuwa pochotsa chidziwitso ndi machulukitsidwe ndikusunga kuwala. Ngati muli ndi Parallel Computing Toolbox™, rgb2gray ikhoza kutembenuza pa GPU.
Kodi ndingasinthe bwanji RGB kukhala grayscale?
1.1 RGB mpaka Grayscale
- Pali njira zingapo zomwe zimagwiritsidwa ntchito nthawi zambiri zosinthira chithunzi cha RGB kukhala chithunzi cha grayscale monga njira yapakati ndi njira yolemetsa.
- Grayscale = (R + G + B) / 3.
- Grayscale = R / 3 + G / 3 + B / 3.
- Grayscale = 0.299R + 0.587G + 0.114B.
- Y = 0.299R + 0.587G + 0.114B.
- U'= (BY)*0.565.
- V'= (RY)*0.713.
Kodi mumapanga bwanji chithunzi cha grayscale ku Matlab?
I = mat2gray( A , [amin amax] ) amasintha matrix A kukhala chithunzi cha grayscale I chomwe chili ndi miyeso mumitundu 0 (yakuda) kukhala 1 (yoyera). amin ndi amax ndizofunika mu A zomwe zimagwirizana ndi 0 ndi 1 mu I. Miyezo yochepera amin imadulidwa ku 0, ndipo milingo yayikulu kuposa amax imadulidwa ku 1.
Chifukwa chiyani timasinthira RGB kukhala grayscale?
Yankho laposachedwa kwambiri. Chifukwa ndi chithunzi chosanjikiza chimodzi kuchokera ku 0-255 pomwe RGB ili ndi zithunzi zitatu zosiyana. Ndiye chifukwa chake timakonda chithunzi cha grey scale m'malo mwa RGB.
Kodi ndingasinthire bwanji chithunzi kukhala grayscale?
Sinthani chithunzi kukhala chotuwa kapena chakuda ndi choyera
- Dinani kumanja chithunzi chomwe mukufuna kusintha, kenako dinani Format Chithunzi pa menyu yachidule.
- Dinani chithunzi tabu.
- Pansi pazithunzi zowongolera, mumndandanda wamtundu, dinani Grayscale kapena Black and White.
Kodi pali kusiyana kotani pakati pa RGB ndi grayscale image?
Malo amtundu wa RGB
Muli ndi 256 mitundu yosiyanasiyana yofiira, yobiriwira ndi yabuluu (1 byte ikhoza kusunga mtengo kuchokera 0 mpaka 255). Chifukwa chake mumasakaniza mitundu iyi mosiyanasiyana, ndipo mumapeza mtundu womwe mukufuna. … Iwo ali ofiira koyera. Ndipo, matchanelo ndi chithunzi chotuwa (chifukwa njira iliyonse imakhala ndi 1-byte pa pixel iliyonse).
Kodi ndimasinthira bwanji RGB kukhala grayscale pogwiritsa ntchito Opencv?
Monga kulowetsa koyamba, ntchitoyi imalandira chithunzi choyambirira. Monga athandizira chachiwiri, izo amalandira mtundu danga kutembenuka kachidindo. Popeza tikufuna kusintha chithunzi chathu choyambirira kuchoka pamtundu wa BGR kukhala imvi, timagwiritsa ntchito khodi COLOR_BGR2GRAY. Tsopano, kuti tiwonetse zithunzizo, timangofunika kutchula ntchito ya imshow ya cv2 module.
Kodi mtundu wa grayscale ndi chiyani?
Grayscale ndi mtundu wamtundu, wopangidwa ndi mithunzi 256 ya imvi. Mitundu 256 iyi imaphatikizapo zakuda kwathunthu, zoyera kwathunthu ndi mithunzi 254 ya imvi pakati. Zithunzi za grayscale zili ndi chidziwitso cha 8-bit mkati mwake. Zithunzi zazithunzi zakuda ndi zoyera ndizo zitsanzo zofala kwambiri za mtundu wa grayscale.
Kodi chithunzi cha grayscale Matlab ndi chiyani?
Chithunzi cha grayscale ndi matrix a data omwe mtengo wake umayimira kukula kwa pixel ya chithunzi chimodzi. Ngakhale zithunzi zotuwa sizisungidwa kawirikawiri ndi mapu amitundu, MATLAB amagwiritsa ntchito mapu amitundu kuti aziwonetsa. Mutha kupeza chithunzi cha grayscale mwachindunji kuchokera ku kamera yomwe imapeza chizindikiro chimodzi pa pixel iliyonse.
Kodi chithunzi cha RGB ndi chiyani?
Zithunzi za RGB
Chithunzi cha RGB, chomwe nthawi zina chimatchedwa chithunzi cha truecolor, chimasungidwa mu MATLAB monga mndandanda wa data wa m-by-n-by-3 womwe umatanthawuza zigawo zofiira, zobiriwira, ndi zabuluu pa pixel iliyonse. Zithunzi za RGB sizigwiritsa ntchito phale.
Kodi cholinga cha grayscale ndi chiyani?
Onse a iOS ndi Android amapereka mwayi wokhazikitsa foni yanu kuti ikhale yotuwa, zomwe zingathandize omwe ali ndi khungu komanso kulola opanga kuti azigwira ntchito mozindikira zomwe ogwiritsa ntchito omwe ali ndi vuto losawona akuwona. Kwa anthu omwe ali ndi mawonekedwe amtundu wathunthu, komabe, zimangopangitsa foni yanu kukhala yovuta.
Kodi grayscale imachepetsa kukula kwa fayilo?
Popeza ma tchanelo onse alipo, fayiloyo singakhale yocheperako. Chomwe chingachepetse, ndikupita ku Image->mode ndikusankha grayscale yomwe ingochepetsa mpaka ma pixel a 0-255 wakuda (kuyerekeza ndi R,G,B kapena C,M,Y,K) ).
Chifukwa chiyani timasinthira BGR kukhala RGB?
Sinthani BGR ndi RGB ndi OpenCV ntchito cvtColor()
COLOR_BGR2RGB , BGR imasinthidwa kukhala RGB. Ikasinthidwa kukhala RGB, imasungidwa ngati chithunzi cholondola ngakhale itasungidwa itasinthidwa kukhala PIL. Chinthu chazithunzi. Mukasinthidwa kukhala RGB ndikusungidwa ndi OpenCV imwrite() , chidzakhala chithunzi cholakwika.
Kodi ndingasinthire bwanji chithunzi kuchokera ku grayscale kukhala RGB?
Kutembenuka kwa grayscale kukhala RGB ndikosavuta. Ingogwiritsani ntchito R = G = B = imvi mtengo. Lingaliro loyambirira ndiloti mtundu (monga umawonedwa pa chowunikira malinga ndi RGB) ndi njira yowonjezera. Choncho kuwonjezera zofiira ku zobiriwira zobiriwira zimatulutsa chikasu.
Kodi Grayscale ndi yofanana ndi yakuda ndi yoyera?
Kwenikweni, “grayscale” ndi “zakuda ndi zoyera” ponena za kujambula zimatanthauza chimodzimodzi. Komabe, grayscale ndi mawu olondola kwambiri. Chithunzi chenicheni chakuda ndi choyera chikanakhala ndi mitundu iwiri-yakuda ndi yoyera. Zithunzi za Grayscale zimapangidwa kuchokera ku zakuda, zoyera, ndi mithunzi yonse ya imvi.
Kodi RGB ndi Grayscale ndi chiyani?
Grayscale ndi mitundu yosiyanasiyana ya imvi popanda mtundu wowoneka. … Pa pixel iliyonse mu chithunzi chofiira-chobiriwira-buluu (RGB) chotuwa, R = G = B. Kuwala kwa imvi kumayenderana mwachindunji ndi nambala yoimira milingo ya kuwala kwa mitundu yoyambirira.