Tahuri BMP Tuhinga o mua 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 BMP hei matua, ā, ka whakahōu anō te JPG mai i tēnei i te wā e hiahiatia ana e koe he rahi hōu. Kāore e hiahiatia ana e te BMP tētahi puna whakakōrero, nā reira ka noho tonu te hanga whakawhitinga haumaru mō ngā pūnaha whakawātea me ngā utauta Windows o mua.

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, ka kōwhiria he ūnga mārama-mārama i te 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 whakamātauria ngā tātai tae ICC whakatinana mai i te pūtake BMP, ā, ka hono anō ki te huaputa JPG i reira ka tautokona e te hanga (JPG, PNG, TIFF, WebP). Ko ngā hanga kāore i te tautoko i te tātai e hoki ana ki te sRGB me tētahi hipanga whakamātautau.

E pupuritia ana te EXIF o te kāmera (ISO, shutter, lens, GPS) mā te pūmau i te wā o BMP -> JPG ina tautokona e ngā āhua rua ngā metadata. Ka whakamahia te whakarerekē ā-whakaaro hei whakawātea i ngā metadata i mua i te whakataki mēnā e hiahia ana kia tiritiri i ngā whakaahua me te kore tauwāhi, pūrere-kitenga rānei.

He — ka tangohia he maha ngā pūranga BMP ki te rohe tāpiritanga, ā, ka whakatū i te raupapa. Ka whakaaetia e te taumata wātea 100 MB ia pūranga; Kāore he kōpaka-whakahaere, ā, ka haere tonu ngā kaimahi whakawhāiti ake, nō reira ko te 200-pihi te whakamutu i raro i ngā minu e rua.

Mō te tahuri ā-whakahaere, ka whakarewaina e tātau te pūtautau pūrākau pū

Ko te whanonga pūmau ko te 1:1 — he ōrite ngā ahu o ngā pikitia o tōtou huaputa JPG ki te pūtake BMP. Mēnā e hiahiatia ana e koe te whakarea hei wāhanga o te tahuritanga, ka whakamahia /resize-image/ i muri, ka whakapāpāho rānei i ngā mahi me te utauta /image-pipeline/.

Mō JPG / WebP, ko te āhuatanga 75-85 e hua ana i tētahi JPG 60-80% iti iho i te BMP me te kore rerekētanga mārama i te tawhiti tirohia noa iho. Mō te JPG kore ngaro (PNG, TIFF), e tūmanako ana ki ngā pūtea iti iho — i te nuinga o te wā 5-30% mā te whakawhāititanga pai ake / LZW i te pūtake. 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 — e whakaata ana ngā pūranga BMP i whakarewaina i roto i ngā kaimahi motuhake, ā, ka tangohia i roto i ngā minu. Kāore anō tātau kia pānui, ki te penapena, ki te tiritiri rānei i te raraunga pūwhiti. Kua tuhituhitia te matapihi tūturu i te /privacy/.

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, HEIF 10-bit). Ka rere te pūtauira i ngā rārangi pūtauira kia tauinetia ai te pūmahara me te tatau rārangi, ehara i te tatau pūtauira katoa.

Ko te BMP pūranga me te whakawhāiti kaha (JPG tino ngaro) ka tipu ina whakawaengatia anō ki tētahi JPG kore ngaro (PNG, TIFF), ā, he nui te whakawhāiti i te bitrate-high-lossless BMP ina haere ki JPG/WebP. E whakawhirinaki ana te ōwehenga ki ngā ihirangi whakaahua (he rerekē te whakawhāiti i ngā whakaahua mai i te toi raina, i ngā whakaahua rānei). He tino nui te BMP — tata ki te 36 MB te nui o te whakaahua 12-megapikē — ā, kāore he kaiwhaiwhai e whakaaro ana ki a ia hei āhua o te Wīwī. 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.