Ka whakamahi a JPEG i te kōpeketanga ngaronga kua arotauhia mō ngā whakaahua, kia taurite ai te kounga me te rahi o te kōnae.
Ngā Whakamahinga Noa
Whakaahua mamati
Ngā whakaahua tukutuku me ngā whakaahua iti
Ngā āpitihanga whakaahua īmēra
JPEG Ngā Pātai Auau mō te Tahuritanga
He aha te JPEG?
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Ko te JPEG (Joint Photographic Experts Group) he paerewa kōpeketanga whakaahua mō ngā whakaahua mamati.
He mea kino ake te tiaki i tētahi JPEG i ia wā?
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He, ā, ko te mea kotahi e mōhiotia ana mō te āhua. Ka whakarewa anō e ia tiakitanga te whakawaenga ngaro i runga i tētahi whakaahua kua puta mai, kia āhua ai ngā ahanoa - e kitea ana hei ārai i te tuhituhi me ngā arorangi i runga i ngā taitapa mārō i muri i te tokomaha o ngā whakatupuranga. Ka whakakē i tētahi matua kore ngaro, ka whakawātea ki JPEG kotahi, i te mutunga, kaua e whakawātea i te whakatupuranga o te whakatupuranga, me te tiaki anō i te pūtahi. He ōrite te rerenga ira ki te.jpg: te whakawhāititanga whakangaromanga i runga i te DCT, i te nuinga o te wā me te 4:2:0 chromatic subsampling, i whakawhāititia ki roto i te JFIF, Exif rānei.
He aha te take i tuku ai e ia kāmera me te tātara ki a au he JPEG?
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Nā te mea ko te āhua o te mekameka katoa o te whakaahua i whakatū i ngā tekau tau i mua, ā, kāore he mea e tika ana te mōrearea o te pūnaha ki te kaimahi tātari. Ka whakamātauria te raraunga pūoko, ā, ka whakawaeheretia i roto i te kāmera anō, i tētahi tautuhinga āhuatanga i whakawāteatia i roto i te rārangi, ā, ko te mea e tū ana i runga i te kāri he whakaahua kua oti. Ko te take kāore te tahuri tuatahi o tētahi whakaahua i te wātea o te ngaronga e māharahara ana te tangata — kua puta kētia te wātea o te ngaronga, i roto i te kāmera. He ōrite te paerewa o JPEG ki te JPG me te JFIF — ko te whakaroatanga-whā-whā te taketake, ā, ko te tohutoro-toru-whā anake nā te whakawhāititanga o te ingoa pūranga DOS 8.3.
He ōrite te āhua o JPEG ki ōna whakaroatanga atu?
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He. Ko tēnei whakaroanga me te ingoa roa, poto rānei e kitea ana e koe i te taha o te whakaahua i tētahi āhua taketake, ā, ko tētahi mea e whakaako ana, e whakaako ana rānei i te rua. He hītori nga ingoa e rua: he tepe ingoa pūranga e waru ngā āhua mai i te wā DOS, he kaipāpāho e whakaingoa ana i tōna taupānga i te āhua o tōna pūranga, e rua rānei ngā papatono i whakaritea kētia. Ka whakaputa anō te tahuritanga i te hua ōrite, nō reira ka whakamahia te whakaroanga e tūmanako ana te pūmanawa i te taha o te taha.
He aha te whakaritenga āhuatanga me whakamahia e au ina tahuri ki JPEG?
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I tētahi wāhi i waenganui i te 80 me te 90 mō tētahi mea e tirohia ana e tētahi tangata. I raro i te 75 ka tīmata te whakaaturanga o ngā ahanoa ki te āhua o te kiri, te rangi me ētahi wāhi matatini nui; i runga ake i te 95 ka tere te tupu o te faila i te mea kāore pea e kitea e tētahi te rerekētanga. Kāore te whakaritenga i te āhuatanga o te whakaahua, he whakataunga mō tēnei whakawāteatanga motuhake — nō reira ka kōwhiria mō te wāhi e haere ai te faila, me te pupuri i te taketake mō te wā e whai ake nei e hiahiatia ana e koe tētahi urupare rerekē.
Ka taea e JPEG te pupuri i te tae CMYK mō te tātuhi?
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Ka taea, nā reira ko ngā pūranga mai i ngā rerenga mahi tātuhi i ētahi wā e āhua āhua kē ana i runga i te mātakina: ko ngā tae e tautuhia ana i roto i ngā ōrautanga pepa mō te tātuhi, kaua i te mārama mō te mātakina. Ko te nuinga o ngā āhuahira tīwae ko te RGB anake, nō reira me whakamāoritia tētahi tahuritanga, ā, ko te whakamāoritanga e tata ana ki te - te tino whakangāwaritanga o te cyan me te kararehe. Mō ētahi mea e haere ana ki tētahi tātuhi, ka pupuri i te taketake i te taha o te mea e tahuri ana.
He mea hira rānei he toru tekau tau te JPEG?
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Ko te pakeketanga anake ehara i te raruraru — he maha ngā āhuahira mai i taua wā e pai tonu ana, i te mea kua tekau tau te whakatinana i a rātou. Ko te mea e hiahiatia ana ko te wā: he pūranga iti, he pūkaha iti, kāore he whatunga, me ngā āhuatanga kāore e hiahiatia ana e tētahi. Ki te āhua tonu o ēnei whakaaro, he pai te āhuahira. Ki te kore rātau, ko te take ki te tahuri.
Ka tiakina te raraunga pūwhitiwhiti me te tauwāhi i te wā e tahuri ana au i tētahi JPEG?
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Ka mau i runga i te wāhi e tautoko ana te āhuahira ūnga i a ia — te tauira kāmera, te whakaata, te wā whakataki, me ngā taururuku GPS mēnā i whakatakitia e te pūrere. Ko te mea whakamutunga e hiahiatia ana kia whakaarotia i mua i te whakaputanga: ka taea e tētahi whakaahua i te wātea o te pūrongo te mau i te tauwāhi tika i tangohia ai. Ka whakawātea te metadata i te wā o te tahuritanga ina haere te whakaahua ki tētahi wāhi tūmatanui.
Ka taea e au te whakamahi i te JPEG hāngai ki tētahi pouwāhi whatunga?
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He — ko ia kaitiaki o nāianei e whakawātea ana i te āhua taketake, nō reira kāore e hiahiatia he tārua whakarerekē, ā, kāore he tahuritanga i te wā o te whakaputanga. Ko te pātai e toe ana he taumaha ake i te tautoko: ko te whakaahua ōrite i roto i tētahi āhua tīpae o nāianei he toru o te rahi i te āhuatanga āhua ōrite, e tika ana kia mahi i tētahi mea e puta ana i runga ake i te whiri. Ko te JPEG te whakaroatanga e manakohia ana e te nuinga o ngā kāmera, ngā karaehe me ngā pūmanawa taketake Unix, ā, e mōhiotia ana i te ao whānui.
Ka taea e au te whakahōu te whakaroa i te wāhi i te whakarerekētanga o JPEG?
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Tata tonu ki te kore, ā, e mōhio ana te take: he tohu te whakaroatanga, i te wā e hanga ana ngā paerewa i roto mō tētahi hanga tauwhāiti. Ka whakaputaina e te whakahōutanga he faila ko te ingoa e whakapuakina ana he mea kāore i te tuku i ōna ihirangi, ā, ko te mea e whakatuwheratia ai, ka whakakāhore rānei i te faila, ka pāpāho rānei. Ko te whakawāteatanga whāiti kotahi ko ngā hanga e rua e tino ōrite ana i raro i ngā ingoa rerekē — ā, ahakoa he haumaru ake te whakaroanga tika i te whakahōutanga.
Ka taea e au te tahuri i tētahi pūrākau katoa o ngā pūranga JPEG i roto i tētahi neke?
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Me tētahi kāwanatanga, ā, — ka whakawātea rātau i te katoa, ā, ka whakawāteatia hei mahi kotahi, kaua e whakahaeretia tētahi i tētahi wā, me ngā whakaritenga ōrite e hoatu ana i te rōpū, ā, ka hoki ngā hua tahi. Ko ngā tahuritanga wātea e whakahaere ana i tētahi pūranga kotahi i tētahi wā (e rua ngā utauta whakakotahi); Ko te kaupapa utu te mea e whakawātea ai i te tukanga rōpū me te tepe nui ake i ia pūranga, e whakarerekē ana i tētahi pūranga katoa.
He aha te huarahi pai ki te tukatuka JPEG ngā kōnae?
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Tukuna noa tō kōnae mā te whakamahi i tā mātou atanga tōia-me-taka, pāwhiritia rānei hei tirotiro. Tīpakohia te hōputu putanga e hiahiatia ana e koe, kātahi ka pāwhiri Tahuri. Ka rite tō kōnae kua tahurihia hei tango i roto i ngā hēkona.
