Kev pom kev nrig hauv cov ntawv luam tawm FM dot
Peb yog ib lub tuam txhab luam ntawv loj hauv Shenzhen Tuam Tshoj. Peb muaj cov phau ntawv luam tawm, phau ntawv xov xwm luam ntawv, phau ntawv luam ntawv, phau ntawv nyuaj, phau ntawv luam tawm, phau ntawv luam tawm, phau ntawv luam tawm, lub thawv ntim, daim qhia ntawv, txhua yam ntawm PVC, cov ntawv luam tawm, ntawv sau cia, hom tshwj xeeb ntawv xim luam tawm khoom, kev ua si cardand li ntawd.
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Txij thaum thawj zaug kuaj cov khoom kuaj FM lawm, ntau tshaj li lub caij nplooj ntoos hlav thiab caij nplooj zeeg caij nyoog dhau los lawm, thiab nws txoj kev loj hlob tsis tau hloov AM thiab hauv Internet raws li cov neeg muaj kev kwv yees, thiab daim ntawv thov, tshwj xeeb tshaj yog hauv cov chaw luam ntawv, tau qeeb los tsim. . Vim li cas ho muaj ntau, ob qho tib si ntawm cov txheej txheem thiab cov khoom siv, thiab cov laj thawj ntawm cov neeg nkag siab vim yog kev tshawb fawb tsis txaus. Lawm, muaj teeb meem nrog kev ntsuam xyuas lub tshuab fais fab FM xwb, xws li kev ntsuam xyuas FM, tab sis nws tsis tsim qhov dav hlau modulation. Lub moiré nyob rau hauv kev ntsuam xyuas hom, tab sis cov suab nrov (granularity) cuab kev dua. Qhov nrov qhov muag pom tau qhov twg los? Yuav ua li cas mus xyuas lub suab nrov nrov thiab yuav ua li cas los txo lub suab nrov kom lub FM duab duab tau tiag tiag tus yees duab. Qhov no yog ib qho teeb meem theoretical thiab technical uas yuav tsum tau kho kom sai.
FM cov qauv kev faib tawm thiab cov txiaj ntsim ntawm FM kuaj
Cov yam ntxwv ntawm yam ntxwv ntawm AM cov lus qhia yog: cov ntsiab lus tseem ceeb (cov ntsiab lus ntawm cov ntsiab lus) nyob rau hauv daim phiaj yog feeb meej raws li qee txoj cai; qhov chaw nrug ntawm cov dots yog qhov kawg thiab sib npaug; thiab cov theem teev yog sawv cev los ntawm qhov ntsuas me me (qhov cheeb tsam teev cheeb tsam). Lub cim qhov teeb meem (kis kis) ntawm qhov FM network teeb yog siv thiab muab faib rau hauv kab sib chaws; qhov kis ntawm cov dots randomly hloov; qhov loj ntawm qhov teev yog tsis hloov, thiab tus zaus (zauv) ntawm qhov teev tshwm hauv thaj chaw hauv thaj chaw nruab nrab yog sawv cev qib.
Yog vim li cas vim li cas cov kev ntsuam xyuas FM tau txais kev saib xyuas los ntawm txhua tus neeg thiab siv rau hauv ntau yam yog vim nws muaj ntau yam zoo, xws li tu tub tu kiv ntawm cov txheej thawj ntawm lub ntsej muag tseem ceeb thiab tsaus nti, uniform cov zauv ntawm txheej, tsis muaj moire. Nws tsis yog txwv los ntawm lub kaum sab xis ntawm cov teev, thiab qhov ntau ntawm kev tsim cov laus yuav nthuav dav dua. Txawm li cas los xij, FM screening technology kuj coj tau teeb meem rau kev luam ntawv thiab qhov zoo ntawm cov khoom luam tawm. Piv txwv, vim hais tias cov dots me me, cov dots yog yooj yim poob thaum luam ntawv, thiab cov tseev kom muaj rau daim hlau, kev luam ntawv thiab kev luam ntawv muaj ntau xav tau; Tus nqi ntau dua thiab txoj cai ntawm kev nthuav dav yog tshwj xeeb. Dua li, qhov muag pom tau los ntawm FM kuaj tau ua ib ntawm cov teeb meem tseem ceeb limiting cov kev nce qib thiab daim ntawv thov kev kuaj xyuas FM.
Kev pom kev nrig ntawm FM dot dluab
Lub sij hawm "suab nrov" los yog lub suab nrov, thaum xub thawj siv los piav tus cwj pwm suab ntawm lub xov tooj cua tsis muaj lub teeb liab. Ib yam li ntawd, nws tseem tuaj yeem piav qhia txog cov qauv kev kos thaum muaj qee qhov channel tsis muaj qhov teebmeem ntawm kev siv lub xovtooj hluav taws xob. Nyob rau hauv cov ntaub ntawv no, cov duab tso tawm ntawm lub vijtsam TV zoo ib yam li cov khoom ntawm lub emulsion, yog li lub suab nrov nrov siv tau los piav txog qhov gravity ntawm daim duab, thiab lub suab nrov theem ua ib qho kev ntsuas ntawm granularity. Vim lub plhaub ntawm daim ntawv thiab cov zoo li, qhov tsis sib haum ntawm qhov sib npaug ntawm qhov me me (qhov qhia me me ntawm cov duab me me) ntawm cov duab luam tawm, yog li ntawd cov duab luam muaj qee yam "roughness", uas yog, muaj ntau tshaj plaws. Qhov tsis-uniformity ntawm graininess los yog ntom (shading), uas yog qhov muag pom ntawm daim duab luam.
Lub nrig qhov muag pom (graininess) ntawm daim duab luam tsis yog tshwj xeeb rau cov duab FM duab, thiab cov lus pom zoo AM teev duab kuj tau tsim. Rau ib lub sijhawm ntev, rau cov duab AM, qhov nruab nrab ntawm kev mloog yog los tiv thaiv lub suab lus, thiab txo cov suab nrov dua, vim hais tias qhov muag pom ntawm AM duab yog me me. Lub suab nrov ntawm daim duab kos duab FM kuj yoojyim, thiab nws yog qhov cuabyeej thiab tsis tuaj yeem pomzoo. Lub suab nrov ntawm qhov duab Dot duab tau yooj yim nyob rau hauv lub siab qhov tseem ceeb thiab nruab nrab ntawm cov laus. Thaum txoj kev pabcuam ntawm qhov chaw khomob yog 20%, lub qhov muag ntawm cov tib neeg lub qhov muag mus rau qhov muag nrov nrov, tshwj xeeb tshaj yog nyob rau ntawm thaj chaw tiaj tus ntawm tib theem. Sib piv ob lub duab FM ntxiv nrog ntau lub suab nrov. Cov suab nrov tsawg dua yuav tsum muaj ntau dua, thaum duab ntxoov ntxoo yuav tsum rougher. Nws yog tsim nyog hais tias lub nrig txog kev pom tsis yog lub suab, tsis ua los ntawm kev cuam tshuam cov duab ntawm cov xim sib cais, thiab cov duab kos duab monochrome kuj tuaj yeem tsim suab nrov.
Ntsuas ntawm qhov ua rau suab nrov
Feem ntau, qhov muag pom ntawm FM dot luam duab yog loj dua AM duab duab. Thiab tib yam li kev ntsuam xyuas FM, cov ntsiab lus duab zoo li qub, lub suab nrov yog txawv. Txawm hais tias nws yog ua tau kom nce lub suab nrov ntawm daim duab duab thaum qhov kev luam duab-txheej txheem me me, qhov tseem ceeb tshaj uas cuam tshuam rau lub suab nrov yog obviously txoj kev ntsuam xyuas.
Lub cim thiab qhov loj ntawm qhov muag pom ntawm FM duab kos tau tshwm sim los ntawm cov dotity density (pes tsawg tus ntaus pixels los yog number case dots ib cheeb tsam twg) hauv daim duab, tus nqi nruab nrab ntawm qhov nruab nrab cov ntawv hloov, thiab tus nqi nruab nrab ntawm qhov ntsuas suab hloov pauv. Thaum twg qhov kev hloov pauv ntawm qhov nruab nrab ntawm qhov nruab nrab thiab lub suab yog me, tsis muaj qhov pom kev nrig yog tsim los ntawm qhov ntom ntom; Thaum cov density loj loj rau ib qho twg, txawm hais tias qhov nruab nrab cov kab thiab cov pitch hloov pauv loj, tsis muaj suab nrov yog generated, vim hais tias qhov no Thaum lub sij hawm, qhov muag tib neeg tsis paub qhov tshwj xeeb me me qauv. Thaum tus nqi ntawm qhov density tsawg dua qhov tseem ceeb hauv lub xeev, thiab tus nqi nruab nrab ntawm qhov nruab nrab cov kab thiab cov pitch hloov tus nqi ntau tshaj qhov tseem ceeb hauv lub xeev, cov suab nrov pom tau los. Nyob rau hauv qhov no, thaum tus nqi hloov ntawm cov nplooj ntawv thiab lub suab me me, qhov dotity density yog me me rau cov suab paj nruag liab, thiab qhov ntom ceev yog loj rau xiav lub suab nrov. Raws li tus nqi ntawm kev hloov hauv cov ntawv nruab nrab thiab kis tau ntxiv mus ntxiv, dawb nrov nrov tshwm sim, uas yog qhov tseem ceeb heev. Txij li thaum tib neeg cov yeeb yam pom muaj cov ntxaij lim dej tsawg dhau, lawv tsis hnov cov suab xiav thiab tsis hnov li cas, thaum lub suab nrov dawb ua qhov muag.
Keeb xeeb, qhov loj ntawm lub FM network yog tib yam. Yuav ua li cas tau muaj kev hloov hauv qhov txoj kab uas hla lub dia? Lub ntsiab yog vim li cas cov random faib ntawm FM dots. Nyob rau hauv txoj kev ntsuam xyuas, cov lus qhia ntawm cov hauj lwm tsis yooj yim tuaj yeem yooj yim ua rau tsevneeg ntawm cov dots, uas ua rau qhov loj me thiab cov duab ntawm cov dots hloov, qhov kev ntsuas ntawm cov dots kuj hloov, thiab qhov kho qhov muag tawm ntawm cov dots hloov, ua rau FM qhov chaw tawm. Muaj qee cov kev sib raug zoo rau ib leeg, qee qhov sib cais, qee leej nyob sib ze, thiab qee qhov sib txawv, uas ua rau txoj kab nruab nrab thiab sib kis ntawm cov dots hloov, thiab ua rau suab nrov FM duab.
Txoj kev zoo los txo cov suab nrov
Cov yam ntxwv ntawm tus qauv ntawm FM qhov taw tes yog cov lus faib ntawm cov ntsiab lus hauv network. Nws tuaj yeem pom los ntawm cov saum toj no kev tshuaj xyuas tias cov lus faib tawm ntawm cov ntsiab lus hauv network yuav coj qhov muag pom kev, yog li qhov yuav txo tau cov suab nrov yuav tsum tau ua kom tiav rau hauv kev txo cov kev sib txuas ntawm cov ntaub ntawv thiab txo qhov sib txawv ntawm kev faib khoom nruab nrab ntawm cov dots. Tom qab xyoo dhau los ntawm kev tshawb fawb, Tuam Tshoj tau ua tiav cov txiaj ntsim tau zoo kom tsis txhob hnov qhov nrov ntawm cov duab FM network.