Tahuri PNG Tuhinga o mua JPG

Tahurihia Tō PNG Tuhinga o mua JPG kōnae ngawari

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Tukuatu ana

Me pēhea te huri PNG Tuhinga o mua JPG

Hipanga 1: Tukuatu tō PNG ngā kōnae mā te whakamahi i te pātene i runga ake nei, mā te tōia me te whakataka rānei.

Hipanga 2: Pāwhiritia te pātene 'Tahuri' hei tīmata i te tahuritanga.

Hipanga 3: Tikiake i tō mea kua tahurihia JPG kōnae

PNG Tuhinga o mua JPG Ngā Pātai Auau mō te Tahuritanga

He pēhea te tahuri i a PNG ki JPG me te kore e ngaro te āhuatanga whakaahua?

Whakaata atu i tōna PNG me te whakarerekētanga e hoatu ana i te whakarei ake o te āhua-āhua mō JPG. Mō te kore ngaro JPG (PNG, TIFF, BMP) ka tiakina ia pītaki; mō te ngaro JPG (JPG, WebP) ka taea te whakarerekē i te take ā-hua i mua o te tāpiritanga. Ka whakamahia e PNG te whakawhāititanga DEFLATE i runga i ngā raina tātari tātari, kia ora ai ia pikitia, tae atu ki tētahi kanikani ā-arawhiti 8-biti. He ngaro te JPG: ka hurihia te whakaahua ki tētahi DCT, he nui, he waehere entropi, me te kāwae āhuatanga e whakahaere ana i te nui e whakawāteatia ana.

Ka ora te mārama i te tahuritanga o PNG ki JPG?

Kāore — JPG kāore he kanikani Alpha, nā reira ka whakakotahitia ngā rohe mārama ki tētahi tae papamuri, mā, engari rawa ka hurihia e koe. Ko te mea tino mōrearea i tēnei tahuritanga: he tohu āhua mātao i runga i tētahi pātaka mā, ka tae mai ki tētahi kāwai mā i te taha. Ka whakaritea te tae mārō kia ōrite ki te wāhi e noho ai te whakaahua, ka kōwhiri rānei he ūnga e pupuri ana i te Alpha. Kāore he mārama a JPG, ka whakapeka anō i ia wā ka tiakina, ā, ka whakaputaina i te ātetetanga mārama i runga i te tae mārama me te kupu mārama.

He nui te āhuatanga ka ngaro ahau i te haere mai i te PNG ki te JPG?

I te āhuatanga 80-85 kāore e kitea te rerekētanga i te tawhiti tirohia noa iho, ā, ko te nuinga o te wā ka whakapeka te faila e 60-80%. Ko te ātete he huarahi kotahi: ko te tiaki i te JPG anō i te wā kotahi e whakakotahi ana i ngā ahanoa. Whakataki te PNG hei matua, ā, ka whakahōu anō te JPG mai i tēnei i te wā e hiahiatia ana e koe he rahi hōu. Ko PNG te kōwhiringa tika mō ngā whakaahua mata, ngā tohu, ngā toi raina me ētahi atu mea me ngā taitapa mārō, mārama rānei — kāore he whakawhāiti, kāore he tae.

Ka pupuri te tahuritanga o te tahuritanga PNG ki JPG?

Ka ora te mārama ina PNG, WebP, TIFF, GIF, SVG rānei te JPG. Ka whakarerekē te tahuri ki JPG i te kanikani ā-autōhiko ki tētahi papamuri mā. Mēnā e hiahiatia ana e koe te mārama i roto i te hua, ka ūngatia he mārama-mārama JPG i te wāhi o JPG=JPG. Ko JPG te paerewa JPEG mai i te tau kotahi mano e 1992, ā, i muri i ngā tekau tau e toru ko te āhua tonu o te nuinga o ngā kāmera me te nuinga o ngā whatunga e whakamahia ana mō ngā whakaahua.

Ka ora te āhua o tōku tātai tae (sRGB / Adobe RGB / CMYK) mai i te PNG ki te JPG?

Ka whakamātauria ngā tātai tae ICC whakatinana mai i te PNG, ā, ka hono anō ki te JPG i reira te āhua o te tātai e tautoko ana i a ia (JPG, PNG, TIFF, WebP). Ko ngā āhua kāore i te tautoko i te tātai e hoki ana ki te sRGB, e pupuri ana i ngā tae i runga i te nuinga o ngā whakaaturanga o nāianei.

He aha mo te metadata EXIF ina tahuri PNG ki JPG?

Ko te EXIF o te kāmera (ISO, shutter, lente, GPS coordinates) e tiakina mā te pūmau i te wā o PNG → JPG ina tautokona e ngā āhuahira e rua ngā metadata. Ka whakamahia te kōwhiringa whaiaro hei whakakore i ngā metadata i mua i te whakataki mēnā e hiahiatia ana kia tiritiri ngā whakaahua me te kore tauwāhi.

Ka taea e au te tahuri-whakahaere i te maha o ngā PNG ngā pūranga ki JPG i tētahi wā?

He — ka tangohia e tātau he maha ngā pūranga PNG ki te rohe tāurunga, ā, ka whakatūtautau i a rātou i te taha kotahi. Ka whiwhi ngā kaiwhakamaori wātea ki te 100 MB ia pūranga; Kāore he kōpaka i ia pūranga, ā, ka haere tonu ngā kaimahi ōrite, nō reira ka oti te 200-pihi i raro i te rua minu.

He pēhea te ōrite o PNG ki JPG ki Photoshop / GIMP mō te mahi ōrite?

Mō te tahuri ā-tūturu o te āhua, ka whakahaeretia e tātau te pūtautau ōrite libpng / libjpeg-turbo / libwebp / ImageMagick e whakamahia ana e te kaiwhakawhanake papatono, me te āhuatanga pūtea ōrite. Ko te rerekētanga ko te whakahaere rōpū whakarara — ka whakatuwheratia e ngā taupānga papatono tētahi rārangi i tētahi wā; ka whakaaetia e tātau tētahi rōpū.

He aha te rongoā o te JPG tātau pūranga?

Ko te pūmau ko te 1:1 — e pupuri ana tōtou JPG i ngā ahu pikitia o te pūtake PNG. Mēnā e hiahiatia ana e koe te whakarea hei wāhanga o te tahuritanga, ka whakamahia /resize-image/ i muri i te tahuritanga, ka whakapā atu rānei ki te utauta /image-resize/.

He iti rawa te JPG me te kore ngā ahanoa e kitea ana?

Mō JPG / WebP, ko te āhuatanga 75-85 e whiwhi ana i te JPG 60-80% iti iho i te PNG me te kore rerekētanga mārama i te tawhiti tirohia noa iho. Mō te kore ngaro JPG (PNG, TIFF), e tūmanako ana kia iti iho ngā pūtea — i te nuinga o te wā 5-30% mā te whakawhāititanga pai ake / LZW. E whakawhāiti ana te JPG i ngā whakaahua māori, ā, ka taea te whakamātau i ia pūrere, te kaiwhaiwāhi me te tātari i te tīariari.

He tūmataiti ahau PNG i te wā o te tahuritanga?

He — e whakaata ana ngā pūranga PNG i whakarewaina i roto i ngā kaimahi motuhake, ā, ka tangohia i roto i ngā minu. Kāore anō tātau ki te whakaako, ki te penapena roa, ki te tiritiri rānei i te raraunga pūtau. Ko te matapihi tūturu e tuhituhi ana i /privacy/.

He mahi te PNG ki te JPG whakarerekē mō ngā whakaahua nui rawa (50MP+)?

He mea tika mō te wāteatanga tae atu ki te 100 MB. Ka whakahaeretia e te utu ngā tāuru nui ake (300 MB+) me ngā hōhonutanga pūtauira-pōtuhi (16-bit PNG, 32-bit float TIFF). Ka rere te pūtauira i ngā rārangi kia tauinetia ai te pūmahara me te tatau rārangi, ehara i te tatau pūtauira katoa.

PNG

Ka tautokohia e ngā kōnae PNG te māramatanga, ā, ka whakamahia te kōpeketanga kore-ngaro, he mea tino pai mō ngā whakairoiro, ngā waitohu, me ngā hopu mata.

JPG

Ka whakamahi ngā kōnae JPG i te kōpeketanga ngaronga kua arotauhia mō ngā whakaahua, kia iti ai ngā rahi kōnae me te pupuri tonu i te kounga tirohanga.