Mai Juyawa ICO zuwa JPG

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 JPG.

An karanta siffofin launin ICC da aka rufe daga wurin asali ICO kuma aka sake haɗa su zuwa fitarwa JPG 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 ICO → JPG 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 ICO 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 JPG tana da daidaitattun girman piksel kamar yadda wurin asali ICO. 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 ICO 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 ICO 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 ICO wani kwalba ne da ke da bitmaps masu kwance da dama a lokaci guda (16, 32, 48, 64, 128 da 256 px) don haka Windows da masu bincike na iya zaɓar girman da suke buƙata, yayin da JPG na adana bita 8 RGB ta hanyar DCT mai asara tare da 4:2:0 chromatography subsample ta hanyar diff, don haka rubutun rawaya mai kyau da gefen da ke da wuya su ne abubuwan farko da za'a yi wa laushi — don haka mai ƙuntata mai yawa ICO yakan ƘARA idan aka sake encode shi zuwa wani JPG mai rasa, kuma mai girma mai rasa ICO 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 ICO). 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.