JPG Kayan aiki

@ action JPG shi ne tsarin JPEG daga 1992, kuma bayan shekaru goma shi ne har yanzu format mafi yawan kamara da mafi yawan shafukan yanar gizo suna amfani da su ga hotuna.

Ya, kuma wannan shi ne abu guda da ya kamata a sani game da wannan sifar. Duk wani adana yana sake-run da mai ƙoɗar da ya rasa a kan wani hoton da ya wuce ta, don haka artifacts suna haɗawa - ana gani kamar an hanawa a kusa da rubutu da haske a kan gefen da ke da wuya bayan shekaru da dama. Ƙananan canje daga mai kula da ba da asara ba kuma fitarwa zuwa JPG sau ɗaya, a ƙarshe, fiye da buɗewa da sake adana fayil ɗin guda. JPG yana da asara: an canja hoton da DCT, an kwatanta shi, kuma an canza shi da entropiy-code, tare da wani maɓalli na ingancin da ke kula da adadin da aka manta.

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A wani wuri tsakanin 80 da 90 ga duk abin da mutum zai yi kallo a kai. A ƙasa da kusan 75 artifacts na fara nuna a kan fata, sama da duk wani yanki mai girma na flat; a sama da 95 fayil na girma cikin sauri yayin da kusan kowa zai iya ganin bambanci. Shirin ba wani abu ne na sifar ba, shi hukunci ne game da wannan fitarwa ta musamman - don haka zaɓa shi don inda fayil ɗin yake tafiya, kuma ka riƙe asali don lokacin da za ka buƙaci amsa daban.

Saboda JPG ba ta da wani sashe na alfa da za'a adana shi cikinta. Duk piksel dole ya zama launin ɗaure, don haka ɓoyayyen launi zai zama mai haɗewa da wani bango - fari bisa diff - lokacin da aka rubuta fayil. Babu abin da za'a iya dawo dashi bayan haka. Idan hoton ya kamata ya zauna a kan wata fuskar launin fata ko a kan hoto, canja zuwa wani siffar da ke adana ɓoyayyen launi. JPG ba shi da cece-kuce, yana kara lalacewa duk lokacin da aka sake adana shi, kuma yana samar da wani ɓangare mai gani a kan launin da aka yi da kuma rubutu mai haske.

Zai iya, wanda shi ne dalilin da ya sa fayiloli daga shirye-shiryen aikin bugawa a wasu lokutan suna nuna bambanci a kan fuskar kwamfyuta: an ƙayyade launuka cikin kashi na inki ga mai bugawa fiye da haske ga mai gani. Mafi yawan sifofin da ke fuskar yanar gizo sune kawai RGB, don haka wani canji ya kamata ya yi waƙa, kuma waƙa tana da kusanci - mai zafi da ruwan hoda da rawaya. Ga duk abin da ke tafiya zuwa mai bugawa, ka riƙe asali tare da abin da ka canja.

An yi amfani da shi a duk inda format na manufar ke goyon baya shi - nau'in kamara, haske, lokacin kamawa, da GPS coordinates idan na'urar ta riga

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Da wani asusu, na'am - ka saka su a cikin wani wuri tare kuma su kasance a cikin wani tsari kamar aikin daya ba tare da kula da su ba, tare da daidaitattun daidaitawa da aka yi amfani da su a cikin ƙungiya da sakamakon da aka mayar tare. Free conversions run a single file at a time (merge tools take two); a paid plan is what unlocks batch processing and the larger per-file limit, which is what makes converting a whole archive practical.

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