Okwenza Abathwebuli Bezithombe Bakudinga Ukukhathazeka Nge-Image Compresssion
Ukucindezeleka kuyinkinga enkulu uma kuziwa ezithombeni futhi kulula kakhulu ukuchitha isithombe esihle ngokucindezela kakhulu futhi kaningi. Kubalulekile ukuqonda ukucindezela ku-digital photography, ukuze ukwazi ukuyilawula ngokufanele ukuhlangabezana nezidingo zesithombe esithile.
Kuyini ukucindezelwa?
Ukucindezela kusetshenziselwa ukunciphisa usayizi kwanoma iyiphi ifayela kukhompyutha, kufaka phakathi amafayela wesithombe. Amafayela acindezelwe ukunciphisa usayizi wabo futhi enze kube lula ukwabelana kuwebhu. Nokho, uma kuziwa ezithombeni, ukucindezela akuyona into enhle ngaso sonke isikhathi.
Amafomethi efayela wezithombe ezihlukene kuma-cameras e- DSLR namakhompyutha asebenzisa amazinga ahlukene wokucindezela. Uma isithombe sicindezelekile (ekhamera noma kukhompyutha) kunolwazi oluncane efayeleni futhi imininingwane egciniwe yombala, ukuphambene nokubukhali kuncishisiwe.
Ngomumo wokuncintisana onjengelokho olutholakala kwifayela le-JPEG, uzokwazi ukulinganisa amafayela amaningi ememori khadi yekhamera, kodwa futhi uyigugu lokunikela. Abadwebi bezithombe ezithuthukile bazama ukugwema ukucindezelwa ngokudubula amafayela we-RAW, angenakho ukucindezelwa okusetshenziselwa wona. Noma kunjalo, ukuze uthole izithombe eziningi, ukucindezelwa okutholakala ku-JPEG akuyona into ephawulekayo yokushiya.
Ukuqaphela Ukucindezela
Umehluko ekufomeni kwe-compression kungenzeka ukuthi awubonakali esikrinini se- LCD yekhamera noma ngisho nokuqapha ikhompyutha. Kuzobonakala kakhulu lapho ushicilela isithombe futhi uzodlala indima enkulu uma uhlose ukuba leso sithombe sithuthukiswe. Ngisho nekhwalithi yokuphrinta kwe-8x10 ingathinteka ngokucindezelwa okuningi. Kodwa uma nje uhlanganyela isithombe emithonjeni yezokuxhumana, ukulahlekelwa kwekhwalithi ngokucindezela akufanele kuthinte wena ngokwanele ukuze kuvezwe.
I-Digital photography iye yathuthuka kakhulu eminyakeni yamuva. Abathwebuli bezithombe abaningi bafuna ikhamera yakamuva ngama-megapixels amaningi futhi bazoqhubeka bethuthukisa. Kodwa-ke, uma lo photographer ofanayo engakunaki ukucindezela kusukela ngesikhathi isithombe sithunjwa ngokuthunyelwa kwemishini nokugcina, khona-ke baye bamane bachitha ikhwalithi eyengeziwe abayikhokha.
Yeka ukuthi ukucindezelwa kwe-Digital kuyasebenza kanjani ngempela
Ukucindezela kwe-Digital kuyinkqubo emibili.
Okokuqala, inzwa yedijithali ikwazi ukuthatha ulwazi oluthe xaxa kunokuba iso lomuntu lingakwazi ukucubungula. Ngakho-ke, olunye lwalolu lwazi lungasuswa ngesikhathi sokucindezelwa ngaphandle kokuthi umbukeli aqaphele ngempela!
Okwesibili, indlela yokucindezela izobuka noma yikuphi izindawo ezinkulu zokuphindaphinda umbala, futhi izosusa ezinye zezindawo eziphindaphindiwe. Bese bazophinde babuyiselwe esithombeni uma ifayela landa.
Izinhlobo ezimbili zokucindezela isithombe
Kuwusizo ukuqonda izinhlobo ezimbili ezahlukene zokucindezela ukuze sikwazi ukuqonda umphumela abanayo kumafayela.
Ukucindezeleka okungapheli
Lokhu kufana nokudala ifayela le-ZIP kukhompyutha. Idatha icindezelekile ukuze ibe yincane, kodwa ayikho ikhwalithi elahlekile uma ifayela likhishwa futhi livuliwe ngobukhulu obugcwele. Kuzofana nesithombe sokuqala.
I-TIFF yifomethi yefayili evame ukusetshenziswa kakhulu esebenzisa ukucindezeleka okungalahleki.
Ukucindezeleka kwe-Lossy
Lolu hlobo lokucindezela lusebenza ngokulahla ukwaziswa kanye nenani lokucindezelwa elisetshenzisiwe kungenziwa ukhethwe ngumthwebuli wezithombe.
I-JPEG yifomethi yefayili evame ukusetshenziswa kakhulu ekucindezelweni kokulahleka, futhi ivumela abathwebuli bezithombe ukuba bagcine isikhala emakhadini ememori noma ukukhiqiza amafayela afanelekile ukuthumela i-e-mail noma ukuthumela inthanethi. Noma kunjalo, kufanele kuqashelwe ukuthi isikhathi ngasinye lapho uvula, shintsha, bese usindisa kabusha ifayela "elahlekile", imininingwane encane kakhulu ilahlekile.
Amathiphu Wokugwema Izinkinga Zokucindezela
Kunezinyathelo noma yiziphi izintandokazi ezingathatha ukuze zigweme ukulahlekelwa ikhwalithi yezithombe zazo ukuze zicindezeleke.
- Shoot ku-RAW uma ikhamera yakho ikuvumela ukuba. Uma usayizi wefayela nomthamo wesitoreji kuyinkinga kuwe, thola amakhadi abamba ulwazi oluthe xaxa. I-RAM manje ishibhile futhi iyithengeka kakhulu ukuthenga imemori khadi engu-16 noma engu-32 GB. Lokhu akusisona isizathu!
- Londoloza amafayela wakho wokusebenza futhi aqedile njenge-TIF. Uma usuguquliwe kusuka ku-RAW futhi usuthuthukise izithombe zakho, londoloza lezo zithombe zokugcina kwifomethi yefayili engalahleki nesitolo esilondekile. Sebenzisa kuphela i-JPG yokwabelana, kodwa njalo uma udinga ukusebenza kulelo fayela ukuze wenze izibuyekezo, buyela efonini elingalahleki.
- Yeka ukulondoloza amafayela we-JPG! Njengoba kushiwo ngenhla, njalo lapho uvula futhi uphinde ugcine ifayela lokucindezela elahlekile njengeJPGs, ulahlekelwa ikhwalithi yesithombe futhi ngaphambi kokuthi wazi, uzoshiywa ngesithombe se-mush.