I-Dithering isakaza ama-pixel ahlukahlukene ahlukahlukene emfanekisweni ukwenza kube sengathi sengathi kunemibala ephakathi emifanekiso enekhalenda elilinganiselwe lombala. Lokhu kuvame ukutholakala nehluzo ezifakwe kumakhasi wewebhu.Isistimu yakho yokusebenza izokwenza ngokuzenzakalelayo izithombe lapho izilungiselelo zakho zokubonisa zihlelwa kumbala angu-256 noma ngaphansi.
I-Dithering ivame ukusetshenziselwa ukunciphisa ukufaka amabhande kuma-GIF ngokuguquguquka kombala okuphothule. Isofthiwe enkulu inikeza izinketho ezikuvumela ukuthi ulawule ukubonakala kwamaphikseli ahlakazekile; Isibonelo, i-dithering ingaba iphethini eqinile, umsindo ongahleliwe, noma ukusabalalisa. Khumbula ukuthi ukuhamba kungakhuphula usayizi wefayela wesithombe, kodwa ezimweni eziningi, ukubukeka okuthuthukisiwe kuwufanelekile ukuhweba.
Indlela enhle yokuqonda ukuthi imisebenzi ehamba kanjani ukuvula isithombe esibalabala ku- Photoshop . Kusuka lapho khetha ifayela> Thumela> Gcina iWebhu (Ifa) . Uma iphaneli ivula ukhethe ithebhu engu-4-Up.Uzobona izinguqulo ezingu-4 zesithombe futhi enye ekhoneni elingenhla kwesokunxele yisithombe sokuqala. Kulesi simo, isithombe sayizi-1.23 mb ngobukhulu. Okuyisisekelo, le phaneli ikunika ukubuka kuqala kwemiphumela yokuhlelwa kwesithombe. Kunezinto ezimbalwa okufanele uziqaphele kule phaneli.
- Okokuqala yi- choice ye-palette ye-Adaptive . Lokho okukwenzayo ukudala ithebula lombala ngokwezifiso zemibala yesampula kusukela ku-spectrum enkulu kakhulu esithombeni . Isibonelo, isithombe esinemibala eluhlaza okwesibhakabhaka nokubomvu, njengomfanekiso, ikhiqiza itafula lombala elenziwe ngokuyinhloko ngemifino kanye ne-blues. Iningi izithombe zigxilisa imibala ezindaweni ezithile ze-spectrum.
- Ithebula Lemibala yilona into ebhekayo. Leli tafula liyaziwa ngokuthi i-Color Lookup Table noma i-CLUT. Okukwenzayo ukuthatha imibala yasekuqaleni esithombeni bese uyibuyisela emibhalweni ehlukene, ecacile ukuze wenze ukubukeka okuthile. Esikhathini sethu izigidi zezimila esithombeni sokuqala ziye zancipha zibe imibala engu-32 nge-grays, imifino kanye nama-reds amakhulu.
Khetha isithombe ekhoneni elingenhla elingakwesokudla, ukunciphisa inani lemibala ukuya ku-32 bese uphaqa isilayidi se-Dither ibe ngu-0%. Khetha Ukusabalalisa kusuka kwindlela ye-Dither pop. Qaphela ukuthi usayizi wefayela uye wehla ku 67 k kanti imbali eluhlaza ibonakala njengokugeza kombala. Le ndlela ikhiqiza iphethini elingahleliwe lamachashazi alingana nobukhulu obufanayo kodwa ehlukanisiwe noma aqhubeke ahlukane ukuze athole umthunzi "osondelene" ohambisana nesithombe sokuqala.
Khetha isithombe ekhoneni elingezansi elingakwesokunxele futhi ushintshe indlela yayo yokusabalalisa ku-Pattern . Into yokuqala yokuqaphela ukuthi usayizi wefayela usukhuphukele ku-111 1k. Lokhu kungenxa yokuthi i-Photoshop isebenza iphethini yesikwele se-halftone ukufanisa noma yimiphi imibala, hhayi etafuleni lombala. Iphethini iyabonakala kakhulu futhi uma uqhathanisa isithombe sokuxuba ngalokhu uzobona umbala obuningi nemininingwane yesithombe.
Khetha isithombe ekhoneni elingezansi elingakwesokudla bese usetha indlela yayo yokusabalalisa ukuze ushaye umsindo . Futhi kukhona usayizi wefayili ophawulweyo okhuphuka kanye nokwanda kombala nomininingwane yesithombe. Kwenzekani i-Photoshop isetshenziswe iphethini engahleliwe efana ne-Diffusion dither method, kodwa ngaphandle kokushiya iphethini kuwo wonke amaphikseli aseduze. Awekho ama-seams avela ngenqubo ye-Noise futhi inombolo yemibala e-Color Table yanda.
Mhlawumbe uke waphawula izikhathi zaleso sithombe ngasinye ekubukeni oku-4-Up. Ungabakhathaleli kakhulu ngoba zikhathi zokulanda futhi azivamile ukuthi, uma kunjalo, kunembile. I-pop-down eceleni kwesikhathi ikuvumela ukuthi ukhethe ukuhamba komkhawulokudonsa. Izinketho zivela ku-9600 bps (i-Bits Per Second noma Baud Rate) i-modal yokudayela ngokuya ngokushesha. Inkinga lapha awunawo ukulawula ukuthi umsebenzisi uthola kanjani isithombe .
Ngakho yikuphi indlela ye-Dither ongayikhetha? Yilapho ngiya khona futhi ngingaphenduli lo mbuzo. Uma kuziwa kulezo zincumo zizithoba, hhayi umgomo. Ukwenza ucingo lokugcina.