Takaddun PDF ba su da tabbas

A cikin yaƙi na yau da kullun don kiyaye kwamfutocinmu tsafta da aminci, barazanar da lahani sun ninka cikin saurin ban mamaki. Abubuwan da ba masu haɗari ba a yanzu sun zama kayan aikin da suka dace ga waɗanda ke haɓaka ɓarna software kuma suke neman riba ta haramtacciyar hanya. Ofayan waɗannan abubuwan shine takardu a tsarin PDF. Dangane da binciken da kamfanin yayi ScanSafe, kashi tamanin na raunin da aka gano bara ya shafi su Takardun PDF cewa ya ƙunshi lambar cutarwa.


Lokaci ne na riga-kafi mai sauƙi da ƙaramin sabuntawa. Manhajar software ta zama ƙazamar ƙazamar doka wacce ke girma da canzawa kowace rana, neman sabbin hanyoyi don tsallake tsarin tsaro, amfani da lahani, kuma daga ƙarshe ya isa ga kwamfutocin mu. Yanar gizo ta daɗe ta kasance farkon hanyar shigar da waɗannan kwari, don haka kariya mai ƙarfi dangane da riga-kafi da shinge yana da mahimmanci. Hanyar mafi rauni ya kasance mai amfani, amma wani lokacin software tana da lahani. Da takardu a tsarin PDF Yakamata su zama marasa cutarwa, amma saboda matsalar tsaro a cikin mai karanta tsoffin su, sun zama ɗayan kayan aikin zaɓaɓɓe ga masu ƙirƙirar malware. A cewar wani rahoto da kamfanin ya gabatar ScanSafe (Kamfanin Cisco), kashi tamanin na raunin da aka gano a lokacin 2009 suna da alaƙa da wasu Takaddun PDF wancan ya ƙunsa lambar cutarwa, neman amfani da wasu kurakuran tsaro da Adobe software (ƙari musamman, Mai karatu da Acrobat) yana wahala.

Adobe yayi ƙoƙari ya amsa waɗannan lahani da sauri tare da facin lokaci-lokaci, amma sakamakon yana da kyau. Kashi na farko na shekarar bara ya fara da kimanin kashi 56, ya tashi zuwa kashi sittin, sannan ya kai saba'in, kuma daga karshe zuwa kashi tamanin. Baya ga kurakurai a cikin kayan aikin Adobe, shahararrun shirye-shiryenta ne kuma ke jawo masu ɓarna. Amfani da PDF format yana da girma sosai, kuma masu amfani suna buƙatar mai karanta PDF a hannu. Yawancin shirye-shiryen da ke amfani da wannan tsarin suna sanya Adobe Reader a kan kwamfutar, kuma ganin tana buɗe fayilolin PDF ba tare da matsala ba, masu amfani suna amfani da shi ba tare da yin la’akari da madadin ba. Har yanzu, duk da yawan raunin da aka gano, hanyar don kare kanku ta kasance iri ɗaya: Ci gaba da Adobe Reader har zuwa yau (idan suna amfani da shi), musaki JavaScript a cikin sashin saitin sa, kar ayi amfani dashi ta hanyar hadewa tare da burauzar gidan yanar gizo, kuma duba sosai a kan asalin fayil ɗin PDF.

Alternatives

Babu kyau a yi la'akari da madadin a cikin masu karanta PDF. A kan dandamali na Windows, Foxit Reader yana daya daga cikin mafi bada shawarar, amma SumatraPDF Ya girma sosai a cikin 'yan kwanakin nan, kuma ya kasance kamar haske koyaushe.

PDF da Djvu

'DjVu', fasaha ce mai matse hoto hakan yana zuwa ne don bayar da amsar da ta dace da bukatun ci gaban yanar gizo don ƙunshin hotuna masu ƙuduri, hotuna, da kuma lambobin tattara bayanai gaba ɗaya.

Mai duba takardu DjVu

Samun wasu lokuta rabo matsawa na Sau 5 zuwa 10 mafi girma fiye da sauran hanyoyin ('jpeg' misali), kuma yin aiki a cikin yadudduka ya sa ya zama mafi kyau duka don haɓaka cikin ci gaban yanar gizo. An haɓaka ta AT & T tun daga 1996 (cikakkun bayanai na fasaha).

Saboda kyawawan halayensa waɗanda ke ba ta babban filin amfani, 'DjVu' shine tsarin bugawa wanda mai yiwuwa zai maye gurbin, a matsayin sabon mizani, sanannen 'PDF' ɗin mu.

Idan 'DjVu' yayi kyau ... yaya ban san shi ba ...?

Shin wuya ba da dalilin dalili na rashin watsa kyawawan zaɓuɓɓuka waɗanda ke cikin Free Software (a matsayin takwaransa ga mallakar software, ko -kadai-, a cikin yawancin zabin kyauta), saboda haka zaka iya barin tunanin ka ya zame daji ka zabi wanda ka fi so -Ta hanyar, har zuwa 'yan kwanaki da suka gabata shi ma da wuya na san shi, na ji sunansa amma ban tuna a wace mahallin ba ... -. Tun da wannan ba batun bane, kuma a taƙaice, bari mu ce akwai kyawawan kayan aiki masu kyau da yawa waɗanda ke da wahalar iya rufewa / sanin komai. Amma, idan kuna karanta wannan, da rashin fahimta Dangane da wannan, muna fatan an shawo kansa, ko kuma motsa ku-mafi ƙaran-don neman amsoshi mafi kyau.

Game da wasan kwaikwayon 'DjVu', zaku iya samun damar bayanan kwatancen wanda koyaushe shine mafi kyawun samun ingantaccen ra'ayi, zuwa wannan shine matakan daidaitawa don haka ke faranta masana kimiyyar kwamfuta. A gare ni, kawai ta hanyar nema da yawa rage girman fayilda kuma inganci dangane da tsarin PDF wanda aka kiyaye (ɗayan damar maye gurbin), ya riga ya zama aiki azaman zaɓi. Ari, idan kun karanta kwatancen kun riga kun san cewa ba kawai ƙimomin ana kiyaye su ba amma ya fi kyau ...

Amfani da DjVu

To, mun zo mafi kyawun bangare, kuma inda asirin ya bayyana: Yadda ake aiwatar da DjVu akan kwamfutocinmu! A nan abin takaici dole ne mu raba: masu amfani da kyauta / masu amfani a ƙarƙashin MS-Windows.

Idan kun kasance daga na farko, kuna amfani 'GNU / Linux', zaka iya zabar 'DjVuLibre' -GPL bambance-bambancen ga 'DjVu' format-, wanda yake tattarawa da girka ba kayan aikin da ake bukata kawai don aiki dashi ba, amma kuma abun toshewa ne don mai binciken. Yana da kyau a tuna cewa koyaushe kuna yin la'akari da abubuwanda kuka rarraba (wasu suna iya samun dama akan shafin saukarwa), kuma idan baku iya samun su ba to zazzage lambar tushe (yayin kallon abubuwan dogaro bai cika yawa ba).

Ko da kawai kana so ka samu shiga zuwa wannan nau'in fayil ɗin, ku ma ku girka kunshin da ya gabata, tunda tana da mai kallo (da ɗan Spartan amma yana aiki sosai), kuma shine wanda ke ba da damar toshe-kayan aikin mai bincike.

Ga masu amfani MS-Windows, mafi sauki zabin shine shigar da toshe-a don bawa 'DjVu' karatu a burauzar, don haka samun damar karanta wannan nau'in fayiloli (*). (I mana MAC OS X shima yana da sigar sa).

Idan kuna son ƙirƙirar da su ko ƙaura wasu hanyoyin, akwai wasu kayan aikin akan gidan yanar gizon hukuma, amma ban sami damar kimanta su ba. (Comments tare da kwarewarku maraba ne.)

Kamar yadda na fada a baya, A cikin Free Software akwai zaɓuɓɓuka da yawa ... kuma je zuwa "gefen" fasali da sababbin fasahohi, aiwatar da su a cikin a "Mentari" na kowa ne ... To, idan kuna amfani - Gnome, watakila kun riga kun a 'DjVu' mai karatu: 'rashin lafiya' Daga cikin halayensa kuma yana bayarda azaman sifa kasancewa mai karanta djvu. Idan kana cikin muhalli KDE, kuma idan ba kwa son jira har 'KDE-4', abin da ke sama zai taimake ka. In ba haka ba, 'okular' an kira shi don zama manajan takardu na duniya don KDE, kuma wannan yana buƙatar yanayin da ya gabata, shine zaɓi.

Aƙarshe, babu ƙarancin mahimmanci shine yiwuwar masu goyon baya a 'djvuzone.org' suna ba da damar amfani da mai canza takaddun kan layi: 'Duk2DjVu'

Kamar yadda kuka gani, babu yawa "Na fasaha" cewa zan iya yin sharhi na musamman ... idan kuna da waɗannan damuwa koyaushe kuna iya koyaushe juya zuwa tushe. Abu ne kawai don ba da ra'ayi game da wannan fasahar matsewar hoto wanda saboda halayensa zai ci nasara (tambayar ita ce: Yaya akayi har yanzu bakayi hakan ba…?) Free Software.

Amma ... har yanzu yin ...

Kodayake wannan tsarin yana da kayan aikin kyauta, akwai bambanci a cikin masu ba da bayanai da masu dikodi: duk da cewa suna da kyau kuma suna da kyau, mafi kyawun kododin ana cinikinsu tare da keɓaɓɓun ayyuka bisa ga wannan fasahar, ta kamfanin 'LizardTech Inc.', kuma yana ga nau'in lasisi -wadda ya sa basu dace ba- cewa karshen ba sa cikin 'Tsakar Gida '. Musamman game da direban GhostScript 'GSDjVu', wanda ke aiki a matsayin mai dacewa da 'DjVuDigital' (PostScript da PDF zuwa DjVu mai canza takardu). AT&T shine wanda ya haɓaka direban, amma ya ba da lasisi mai wuyar fahimta a ƙarƙashin 'Common License License V1.0' (CPL), wanda yake yi rashin jituwa dangane da sake rarrabawa a karkashin 'GPL' (lasisin sauran dakin 'DjVuLibre').
Kuna iya tuntuɓar '&ungiyar lasisin mallakar kadarorin ilimi ta' AT&T '(licensing@att.com), ban da yi musu godiya don samar da lambar, kuna neman su sake ta a ƙarƙashin' GPL '(ko ta dace), don ya dace da rarrabawa . Ana iya samun jayayya tare da cikakken bayani a 'djvulibre.djvuzone.org'.

Ta hanyar ƙarshe

Akwai kyakkyawan maye gurbin tsarin 'PDF', ko dai saboda dalilai na falsafa wajen amfani da Free Software da Technologies; ko-ba tare da ƙari ba-, don aiwatarwa kawai kuma ba tare da asarar inganci ba, gabaɗaya samun sa: tsarin da ya dace shine 'DjVu'.

Aiwatar da shi abu ne mai sauƙi, kasancewar zaɓi zaɓi mai sauƙi, mai karanta fayil wanda ya riga ya haɗa da damar yin amfani da waɗannan tsarukan ('evince', a cikin Gnome, misali), ko shigar da ƙaramin kayan aiki idan abin da kuke so shine aiki tare da / a kanta, kuma a gare su babu wani abu mafi kyau 'DjVuLibre'. Idan kuna buƙatar kulawa ko ƙaura da bayanan sirri, zaku iya zaɓar mai canza layi kamar su 'Duk2DjVu'.


Abubuwan da ke cikin labarin suna bin ka'idodinmu na ka'idojin edita. Don yin rahoton kuskure danna a nan.

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