Mai Juyawa WebP zuwa PSD

Haske yana tsira idan aka tafi zuwa PNG, WebP, TIFF, GIF, ICO, PSD ko SVG. Canja zuwa JPG / JPEG / JFIF yana daidaita gidan rediyon alfa kan wani bango mai launin fari — idan kana buƙatar haske, ka yi niyya ga wani siffar haske-da-sannu maimakon PSD.

An karanta siffofin launin ICC da aka rufe daga wurin asali WebP kuma aka sake haɗa su zuwa fitarwa PSD inda siffar ke goyon baya (JPG, PNG, TIFF, WebP, PSD). Siffofin da ba su da goyon bayan siffar (GIF, BMP, ICO, SVG) suna komawa zuwa sRGB.

An kiyaye EXIF na kamara (ISO, shutter, lens, GPS) bisa diff yayin canja wurin WebP → PSD idan nau'ikan biyu suna goyon bayan metadata (JPG, TIFF, WebP, PSD). Yi amfani da zaɓin sirri don cire metadata kafin sauke idan kana so ka raba hotuna ba tare da wurin geolokaci ba.

Na'am — ka ja fayiloli WebP da yawa cikin yankin shigarwa kuma mu sanya su cikin jerin gwano a daidai. Masu amfani da kyauta suna samun 100MB ga kowace fayil; Premium ba ta da wani iyaka ga kowace fayil kuma tana tafiyar da wasu masu aiki a daidai, don haka wani bangare na hotuna 200 na iya kammalawa cikin minti biyu.

Domin canja format mai sauƙi muna tafiyar da irin libpng / libjpeg-turbo / libwebp / ImageMagick da mai sarrafa kwamfyutan tebur ke amfani da shi, tare da ingancin fitarwa mai kama da juna. bambancin shi ne cewa kayan aikin kwamfyutan tebur suna buɗe fayil ɗaya a lokaci; jpg.to yana karɓar baƙo kuma yana tafiyar da su a daidai.

Halin diff shine 1:1 — fitarwa PSD tana da daidaitattun girman piksel kamar yadda wurin asali WebP. fitarwa ICO ita ce mai dacewa (ta samar da wani stack mai matsaloli-da-da yawa: 16/32/48/64/128/256). Idan kana buƙatar sake girman kamar wani ɓangare na canja wurin, ka yi amfani da /resize/ bayan canja wurin.

Ga JPG / JPEG / WebP, inganci 75-85 na iya sa fayil ya fi 60-80% ƙaranci fiye da asali WebP ba tare da bambanci mai gani ba a tsayin gani na yau da kullum. Ga burin da ba a rasa ba (PNG, TIFF, BMP), ka yi tsammanin adadin da za a iya adana shi ya fi ƙaranci — a kan 5-30% ta hanyar ficewa / LZW mai kyau.

Na'am — an yi aiki da fayilolin WebP da aka tura a cikin masu aiki masu tsalle-tsalle kuma an share su cikin minti. Ba za mu karanta, adana, ko raba bayanan piksel ba. An yi takardar doka ta sirri da tagar tsarewa a /privacy/.

Na'am, don kyauta har zuwa 100MB. Premium na iya sarrafa manyan shigarwa (300MB+) da zurfin pixel daban-daban (16-bit PNG, 32-bit float TIFF, multi-layer PSD). Pipeline na fitar da layuka na pixel, don haka amfani da ƙwaƙwalwar ajiya yana daidaita da adadin layuka ba adadin pixels gaba ɗaya ba.

An yanke girman ta hanyar nau'ikan ƙuntata biyu, ba ta hanyar mai canja ba. Ka tuna cewa WebP na dauke da hanyar VP8 mai asara da kuma hanyar da ba ta da asara da kuma alfa mai cika, wanda ke nuna 25-35% a karkashin JPG mai daidaita ingancin gani, yayin da PSD shine Photoshop na asali - layuka, masks, layuka na daidaitawa da hanyoyi na haɗewa suna zama masu rai kuma masu iya gyarawa, wanda babu wani siffar hoton da za'a iya wakilta — don haka mai ƙuntata mai yawa WebP yakan ƘARA idan aka sake encode shi zuwa wani PSD mai rasa, kuma mai girma mai rasa WebP yakan yi ƙarancin girma da sauri a hanyar da ta sauya. Abin da ke cikin hoton yana da muhimmanci: hotuna da zane-zane na layin da aka yi ƙuntata daban-daban.

Na'am. Canjin shi ne canji na siffar fayil - hakkin mallakar abun ciki na hoton yana tare da kai (ko wanda ya mallake shi a kan tushen WebP). Ba mu ƙara wata alama ta ruwa ba, ba mu da wata takardar shaidar metadata, kuma ba mu yi zargin wata lasisi a kan fitarwa.