Tahuri JPG Tuhinga o mua JPEG

Tahurihia Tō JPG Tuhinga o mua JPEG kōnae ngawari

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Tukuatu ana

Me pēhea te huri JPG Tuhinga o mua JPEG

Hipanga 1: Tukuatu tō JPG 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 JPEG kōnae

JPG Tuhinga o mua JPEG Ngā Pātai Auau mō te Tahuritanga

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

Whakaata atu i tōna JPG me te whakarerekētanga e hoatu ana i te whakarei ake o te āhua-āhua mō JPEG. Mō te kore ngaro JPEG (PNG, TIFF, BMP) ka tiakina ia pītaki; mō te ngaro JPEG (JPG, WebP) ka taea te whakarerekē i te take ā-hua i mua o te tāpiritanga. 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. 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.

E pupuri ana te JPEG i te raraunga EXIF mai i tōku JPG?

E whakawhirinaki ana, ā, i te wāhi e noho ai te ūnga ki te whakatakoto i a ia - te tauira kāmera, ngā whakaritenga whakakite, te tītara me ngā taururuku GPS katoa e whakawhiti ana. Ko GPS te āpure e whakaaro ana: mēnā ka whakaputaina te whakaahua, ka whakamahia te kōwhiringa metadata-strip kia kore ai e whakapāpāho i te wāhi i hoatu ai te whakaahua. 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 pupuri te tahuritanga o te tahuritanga JPG ki JPEG?

Ka ora te mārama ina PNG, WebP, TIFF, GIF, SVG rānei te JPEG. 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 JPEG i te wāhi o JPEG=JPG. He ōrite te paerewa o JPEG ki te JPG — ko te whakaroatanga-whā-whā te taketake, ā, ko te tohutoro-toru-whā anake nā te whakawhāititanga o te ingoa pūranga DOS 8.3.

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

Ka whakamātauria ngā tātai tae ICC whakatinana mai i te JPG, ā, ka hono anō ki te JPEG 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 JPG ki JPEG?

Ko te EXIF o te kāmera (ISO, shutter, lente, GPS coordinates) e tiakina mā te pūmau i te wā o JPG → JPEG 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 JPG ngā pūranga ki JPEG i tētahi wā?

He — ka tangohia e tātau he maha ngā pūranga JPG 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 JPG ki JPEG 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 JPEG tātau pūranga?

Ko te pūmau ko te 1:1 — e pupuri ana tōtou JPEG i ngā ahu pikitia o te pūtake JPG. 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 JPEG me te kore ngā ahanoa e kitea ana?

Mō JPG / WebP, ko te āhuatanga 75-85 e whiwhi ana i te JPEG 60-80% iti iho i te JPG me te kore rerekētanga mārama i te tawhiti tirohia noa iho. Mō te kore ngaro JPEG (PNG, TIFF), e tūmanako ana kia iti iho ngā pūtea — i te nuinga o te wā 5-30% mā te whakawhāititanga pai ake / LZW. 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.

He tūmataiti ahau JPG i te wā o te tahuritanga?

He — e whakaata ana ngā pūranga JPG 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 JPG ki te JPEG 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.

Why is my converted JPEG bigger or smaller than I expected?

Ko te JPG me te whakawhāititanga kaha o nāianei (JPG ngaro) ka tipu ina whakawaengatia anō ki te kore ngaro JPEG (PNG, TIFF). Ko te JPG kore ngaro ka whakaiti i te nuinga o te wā e haere ana ki JPG / WebP. E whakawhirinaki ana te ōwehenga ki ngā ihirangi whakaahua — he rerekē te whakawhāititanga o ngā whakaahua i te toi raina. 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. E tiritiri ana a JPEG i ia whakawhāititanga JPG — kāore he huamanu, he ngaronga whakatupuranga i te whakaoranga — me te āhua o te pūmanawa tāpiri e rerekē ana te āhua o ngā whakaroatanga e rua.

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.