Kuv = rgb2gray(RGB) hloov cov duab tseeb xim RGB rau cov duab greyscale kuv . Lub rgb2gray muaj nuj nqi hloov RGB dluab rau grayscale los ntawm tshem tawm cov xim thiab saturation cov ntaub ntawv thaum tuav lub luminance. Yog tias koj muaj Parallel Computing Toolbox ™ ntsia, rgb2gray tuaj yeem ua qhov kev hloov pauv no ntawm GPU.
Yuav ua li cas hloov RGB rau greyscale?
1.1 RGB rau Greyscale
- Muaj ntau txoj hauv kev siv los hloov cov duab RGB rau cov duab grayscale xws li cov qauv nruab nrab thiab qhov hnyav.
- Greyscale = (R + G + B) / 3.
- Greyscale = R / 3 + G / 3 + B / 3.
- Greyscale = 0.299R + 0.587G + 0.114B.
- Y = 0.299R + 0.587G + 0.114B.
- U' = (BY) * 0.565.
- V'= (RY)*0.713.
Yuav ua li cas koj ua ib daim duab greyscale hauv Matlab?
I = mat2gray(A , [amin amax] ) converts matrix A rau grayscale duab kuv uas muaj nuj nqis nyob rau hauv ntau yam 0 (dub) rau 1 (dawb). amin thiab amax yog qhov tseem ceeb hauv A uas sib haum rau 0 thiab 1 hauv I. Cov nqi qis dua amin raug txiav rau 0, thiab cov nqi ntau dua amax raug txiav rau 1.
Vim li cas peb hloov RGB rau greyscale?
Cov lus teb tsis ntev los no. Vim tias nws yog ib txheej duab ntawm 0-255 thaum RGB muaj peb txheej txheej sib txawv. Yog li ntawd yog vim li cas peb nyiam grey nplai duab es tsis txhob RGB.
Kuv yuav hloov cov duab rau greyscale li cas?
Hloov daim duab rau grayscale los yog dub-thiab-dawb
- Txoj cai-nias daim duab uas koj xav hloov, thiab tom qab ntawd nyem Format Duab ntawm cov ntawv qhia zaub mov shortcut.
- Nyem rau daim duab tab.
- Nyob rau hauv cov duab tswj, nyob rau hauv cov xim daim ntawv teev, nyem Greyscale los yog dub thiab dawb.
Dab tsi yog qhov txawv ntawm RGB thiab greyscale duab?
RGB xim qhov chaw
Koj muaj 256 xim sib txawv ntawm liab, ntsuab thiab xiav (1 byte tuaj yeem khaws tus nqi ntawm 0 txog 255). Yog li koj muab cov xim no sib txawv hauv qhov sib txawv, thiab koj tau txais koj cov xim uas koj xav tau. … Lawv liab dawb huv. Thiab, cov channel yog cov duab grayscale (vim tias txhua channel muaj 1-byte rau txhua pixel).
Yuav ua li cas hloov RGB rau greyscale siv Opencv?
Raws li thawj lub tswv yim, qhov haujlwm no tau txais cov duab qub. Raws li cov tswv yim thib ob, nws tau txais cov xim qhov chaw hloov dua siab tshiab. Txij li thaum peb xav hloov peb cov duab qub los ntawm BGR xim qhov chaw rau grey, peb siv tus lej COLOR_BGR2GRAY. Tam sim no, los tso saib cov duab, peb tsuas yog yuav tsum hu rau imshow muaj nuj nqi ntawm cv2 module.
Greyscale xim hom yog dab tsi?
Greyscale yog hom xim, ua los ntawm 256 ntxoov grey. Cov 256 xim muaj xws li dub kiag li, dawb kiag li thiab 254 ntxoov grey nyob rau hauv-nruab nrab. Cov duab hauv hom greyscale muaj 8-ntsis cov ntaub ntawv hauv lawv. Cov duab thaij duab dub thiab dawb yog cov piv txwv feem ntau ntawm cov xim greyscale hom.
Daim duab greyscale Matlab yog dab tsi?
Daim duab grayscale yog cov ntaub ntawv matrix uas nws qhov tseem ceeb sawv cev rau kev siv ntawm ib pixel duab. Thaum cov duab grayscale tsis tshua muaj kev cawmdim nrog daim ntawv qhia xim, MATLAB siv daim ntawv qhia xim los tso saib lawv. Koj tuaj yeem tau txais cov duab grayscale ncaj qha los ntawm lub koob yees duab uas tau txais ib lub teeb liab rau txhua pixel.
RGB duab yog dab tsi?
RGB Duab
Ib daim duab RGB, qee zaum hu ua cov duab tiag tiag, yog khaws cia hauv MATLAB raws li m-by-n-by-3 cov ntaub ntawv array uas txhais cov xim liab, ntsuab, thiab xiav xim rau txhua tus pixel. RGB cov duab tsis siv palette.
Lub hom phiaj ntawm greyscale yog dab tsi?
Ob leeg iOS thiab Android muab kev xaiv los teeb tsa koj lub xov tooj rau greyscale, ib yam dab tsi uas tuaj yeem pab cov neeg uas muaj xim tsis pom kev zoo li cia cov neeg tsim khoom yooj yim dua ua haujlwm nrog kev paub txog qhov lawv cov neeg siv tsis pom kev pom. Rau cov neeg uas pom cov xim tag nrho, txawm li cas los xij, nws tsuas yog ua rau koj lub xov tooj tsis txaus.
Puas yog greyscale txo cov ntaub ntawv loj?
Txij li tag nrho cov channel tam sim no, cov ntaub ntawv tsis zoo li yuav tau me dua. Dab tsi yuav ua rau nws me me, yog mus rau Duab-> hom thiab xaiv greyscale uas yuav txo nws tsuas yog rau pixels ntawm 0–255 tus nqi dub (vs. ib qho rau txhua tus R, G, B lossis C, M, Y, K ).
Vim li cas peb thiaj hloov BGR rau RGB?
Hloov BGR thiab RGB nrog OpenCV muaj nuj nqi cvtColor()
COLOR_BGR2RGB , BGR hloov dua siab tshiab rau RGB. Thaum hloov dua siab tshiab rau RGB, nws yuav tau txais kev cawmdim raws li cov duab raug txawm tias nws tau txais kev cawmdim tom qab hloov mus rau PIL. Duab khoom. Thaum hloov dua siab tshiab rau RGB thiab tau txais kev cawmdim nrog OpenCV imwrite(), nws yuav yog cov duab xim tsis raug.
Kuv yuav hloov cov duab los ntawm greyscale rau RGB li cas?
Kev hloov pauv ntawm greyscale rau RGB yog qhov yooj yim. Tsuas yog siv R = G = B = grey tus nqi. Lub tswv yim yooj yim yog cov xim (raws li saib ntawm lub monitor nyob rau hauv cov nqe lus ntawm RGB) yog ib tug additive system. Yog li ntxiv liab rau ntsuab yields daj.
Puas yog Greyscale tib yam li dub thiab dawb?
Nyob rau hauv qhov tseeb, "greyscale" thiab "dub thiab dawb" nyob rau hauv cov nqe lus ntawm kev yees duab txhais tau raws nraim tib yam. Txawm li cas los xij, greyscale yog ib lo lus tseeb dua. Daim duab dub thiab dawb tiag tiag yuav tsuas muaj ob xim-dub thiab dawb. Greyscale dluab yog tsim los ntawm dub, dawb, thiab tag nrho cov nplai ntawm ntxoov grey.
RGB thiab greyscale yog dab tsi?
Greyscale yog ntau qhov ntxoov ntxoo ntawm grey yam tsis muaj xim pom tseeb. … Rau txhua pixel nyob rau hauv ib tug liab-ntsuab-xiav (RGB) grayscale duab, R = G = B. Lub lightness ntawm lub grey yog ncaj qha proportional rau tus xov tooj uas sawv cev rau lub brightness theem ntawm cov thawj xim.