Gaussian lim Matlab yog dab tsi?
Gaussian lim Matlab yog dab tsi?

Video: Gaussian lim Matlab yog dab tsi?

Video: Gaussian lim Matlab yog dab tsi?
Video: The beauty of the Gaussian distribution (MATLAB) 2024, Kaum ib hlis
Anonim

Gaussian smoothing lim feem ntau yog siv los txo cov suab nrov. Nyeem ib daim duab rau hauv qhov chaw ua haujlwm. Gaussianfilters Feem ntau isotropic, uas yog, lawv muaj qhov sib txawv ntawm qhov sib txawv ntawm ob qhov ntev. Ib daim duab tuaj yeem lim los ntawm isotropic Gaussian lim los ntawm kev qhia tus nqi scalar rau sigma.

Ib yam li ib tug yuav nug, Gaussian lim ua dab tsi?

Cov Gaussian lim ib leeg yuav plooj npoo thiab txo qhov sib piv. Tus Median lim yog non-linear lim uas feem ntau yog siv los ua ib txoj hauv kev yooj yim los txo cov suab nrov hauv cov duab. Nws yog thov rau koob meej (tshaj Gaussian fornoise txo) yog tias nws tshem tawm suab nrov thaum khaws cov npoo sib npaug.

Ib tug kuj yuav nug, Gaussian plooj ua haujlwm li cas? Hauv cov duab ua haujlwm feem ntau hu ua kernels. Qhov no yog kom paub tseeb tias tsis muaj zog ntxiv lossis tshem tawm ntawm daim duab tom qab ua haujlwm. Tshwj xeeb, a Gaussiankernel (siv rau Gaussian plooj ) yog ib qho square array ofpixels qhov twg cov pixel qhov tseem ceeb sib raug rau cov txiaj ntsig ntawm ib qho Gaussian nkhaus (hauv 2D).

Kuj paub, dab tsi yog qhov lim hauv kev ua duab?

Lim ib Duab . Cov duab lim muaj txiaj ntsig zoo rau ntau daim ntawv thov, suav nrog smoothing, sharpening, tshem tawm suab nrov, thiab ntug nrhiav pom. A lim yog txhais los ntawm akernel, uas yog ib qho me me array siv rau txhua pixel thiab nws cov neeg nyob ze hauv ib qho duab.

Vim li cas cov lim lim nruab nrab zoo dua qhov lim nruab nrab?

Cov nruab nrab yog ib tug muaj zog dua nruab nrab tshaj tus txhais tau tias thiab yog li ib qho pixel tsis sawv cev hauv ib cheeb tsam yuav tsis cuam tshuam rau nruab nrab tus nqi tseem ceeb. Vim li no tus nruab nrab lim yog ntau zoo dua atpreserving ntse ntug tshaj tus txhais tau tias lim.

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