Tahuri ICO Tuhinga o mua PNG

Kāore he raraunga pikitia, kāore. Ko ngā āhuahira e rua e rokiroki ana i te whakaahua me te kore whakawhāititanga ngaro, kia ōrite ai te whakaahua e puta mai ana ki te mea i whakaurua, ā, ka taea te tāruatanga i te wā kore e whakawāteatia. Ko te rerekētanga ko te rahi o te faila, ā, ko ngā āhuatanga haere - te hōhonu o te tae, ngā tātai whakawhāiti, ngā apa me te whakatangi e tautokona ana i waenganui i ngā āhuahira kore ngaro.

Ka ora te mārama ina PNG, WebP, TIFF, GIF, SVG rānei te PNG. 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 PNG. I hangaia a PNG i te tau kotahi mano e 1996 hei whakakapi kore whakawhiwhinga ki te GIF, ā, ka noho hei hanga whakaahua pātata kore ngaro o te Wīwī.

Ka whakamātauria ngā tātai tae ICC whakatinana mai i te pūtake ICO, ā, ka hono anō ki te huaputa PNG 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 ICO -> PNG 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 ICO 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 PNG ki te pūtake ICO. 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 PNG 60-80% iti iho i te ICO me te kore rerekētanga mārama i te tawhiti tirohia noa iho. Mō te PNG 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. 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.

He — e whakaata ana ngā pūranga ICO 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 ICO pūranga me te whakawhāiti kaha (JPG tino ngaro) ka tipu ina whakawaengatia anō ki tētahi PNG kore ngaro (PNG, TIFF), ā, he nui te whakawhāiti i te bitrate-high-lossless ICO 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). Kāore te ICO i te āhua o te whakaahua whānui: he tapawhā, he iti, ā, kāore he kaiwhakawhanake whakaahua e whakaaro ana ki a ia hei pūranga mahi ā-ranga tuatahi. He pūāhua whakaahua kino te PNG: ko te whakaahua i tiakina hei PNG, e rima ki te tekau ngā wā e nui ake ana i te whakaahua ōrite, pēnei i te JPG, i te WebP rānei.