Sika Isithombe — Ithuluzi Lamahhala Ku-inthanethi

Kungani usika isithombe

Ukucofa kususa izingxenye zesithombe ongasidingi ukuze isihloko sigcwalise uhlaka. Kuyindlela esheshayo yokuqondisa umkhathi ogwegwile, ukusika ingemuva eliphazamisayo, ukulinganisa isithombe endaweni yebhanela elilungisiwe, noma ukudala isithonjana esiyisikwele kusuka esithombeni esibanzi. I-Crop Image ikunikeza ibhokisi lokukhetha elihudulekayo phezu kwesithombe futhi lithumela kuphela indawo ekhethiwe ngokulungiswa okuphelele kwe-pixel, ngakho-ke umphumela uhlala ucacile. Akukho okulayishwayo, ngakho-ke ngisho nezithombe-skrini ezibucayi nemibhalo kungasikwa ngokuphepha.

Indlela ukucofa kwesiphequluli okusebenza ngayo

Uma ulayisha isithombe ithuluzi lisidweba ku-canvas ye-HTML. Unxande wokukhetha owuhambisayo futhi owushintsha usayizi ufanisa eyodwa kuya kweyodwa kuma-pixel angempela, futhi uma uqinisekisa ukucofa ithuluzi likopisha lowo nxande kuphela ku-canvas entsha bese liwufaka ikhodi njengesithombe esingalandwa. Ngoba izibalo zenziwa kugridi ye-pixel yangempela esikhundleni sokubuka kuqala okukalwe, ukucofa kunembile ku-pixel. Akukho ukubuyisela kabusha indawo oyigcinayo, ngakho-ke ikhwalithi ngaphakathi kokukhetha iyafana nomthombo.

Ukukhetha isilinganiso esifanele

Amapulatifomu ahlukene alindele izimo ezahlukene. Isikwele esingu-1 kuya ku-1 sifanele izithombe zephrofayela namathayela omkhiqizo, i-16 kuya ku-9 ifanele izithonjana zevidiyo namaslayidi esethulo, i-4 kuya ku-5 yifomethi ende esebenza kahle kuma-feeds eselula, futhi i-1.91 kuya ku-1 ifana namakhadi okubuka kuqala isixhumanisi. Ukucofa kusilinganiso esiqondiwe ngaphambi kokulayisha kumisa ipulatifomu ukusika isithombe sakho endaweni engathandeki futhi kugcina isihloko esibalulekile sigxile.

Ubumfihlo nokuphepha

I-Crop Image icubungula isithombe sakho endaweni. Ifayela lifundwa kusiphequluli, liboniswe, futhi lisikwe kumemori, bese libuyiselwa kuwe njengokulanda. Akukho ikhophi ethunyelwa kuseva, egcinwe ku-database, noma eyabiwe. Le ndlela yendawo isho ukuthi ungacofa iskeni sepasipoti, isitatimende sasebhange, noma umklamo ongakhishiwe ngokuzethemba. Uma uvala ikhasi, yonke iminonjana yesithombe isuke kumemori.

Ukusekelwa kwesiphequluli nedivayisi

Ithuluzi lisebenza ku-Chrome, Firefox, Safari, naku-Edge kuwo wonke amadeskithophu neselula, ngaphandle kokufakwa okudingekayo. Ocingweni izibambo zokukhetha zinkulu ngokwanele ukuhudula ngomunwe, futhi ukuhlelwa kuhlala kusebenziseka kuze kufike kusikrini esibanzi esingu-375 pixel. Amafomethi ajwayelekile kuhlanganise ne-JPG, PNG, WebP, GIF, ne-BMP alayisha ngokuqondile, futhi amafayela afika ku-50 MB asika kahle.

Ukucofa vs. ukushintsha usayizi

Ukucofa nokushintsha usayizi kuxazulula izinkinga ezahlukene futhi kuvame ukusetshenziswa ndawonye. Ukucofa kushintsha ukuthi iyiphi ingxenye yesithombe eboniswayo ngokusika ama-pixel emaphethelweni, ngenkathi ukushintsha usayizi kushintsha ubukhulu obuphelele ngokukala wonke ama-pixel phezulu noma phansi. Uma isithombe sinosayizi olungile kodwa sibonisa ingemuva eliningi kakhulu, sicofe. Uma sihlakanywe kahle kodwa sikhulu kakhulu kuma-megapixel, shintsha usayizi waso. Inqubo evamile yokusebenza ukucofa kuqala ekubunjweni okufunayo, bese ushintsha usayizi womphumela kububanzi obuqondile obudingwa yiwebhusayithi noma umsebenzi wokuphrinta, ngakho-ke awukaze ukale kude imininingwane ongase uyigcine.

Amathiphu okucofa okuhlanzekile

Shiya isikhala esincane sokuphefumula eduze kwesihloko kunokusika kakhulu, ngoba amapulatifomu ngezinye izikhathi asika ama-pixel ambalwa lapho ebonisa isithombe. Sebenzisa umthetho wezingxenye ezintathu ngokubeka isihloko esikhulu singagxilile ukuze kube nokubunjwa okungokwemvelo. Lapho ucofa ubuso, gcina amehlo engxenyeni ephezulu yesithathu yohlaka. Qondanisa isilinganiso esiqondile nendawo oya kuyo ngaphambi kokuthi uthumele ukuze ipulatifomu ingaphinde icofe umsebenzi wakho, bese usondeza ukuze uhlole imiphetho ukuze kungabikho imininingwane ebalulekile esikwa emngceleni wokukhetha. Uma ulungiselela isithombe esifanayo ezindaweni eziningana, cofa ikhophi ehlukile yesimo ngasinye kunokusebenzisa kabusha ukucofa okukodwa, njengoba i-avatar eyisikwele nebhanela elibanzi kudinga ukuhlakanywa okuhlukile kakhulu ukuze kubukeke kahle kakhulu.

Indlela Yokusebenzisa Sika Isithombe

1. Vula ithuluzi lokusika isithombe bese wengeza isithombe sakho.
2. Hudula ibhokisi lokukhetha ukuze lihlanganise indawo ofuna ukuyigcina.
3. Shintsha usayizi wezibambo ukuze ulungise imiphetho kuze kufike ku-pixel.
4. Qinisekisa ukusika ukuze kuboniswe indawo ekhethiwe.
5. Landa isithombe esisikiwe ngefomethi yaso yoqobo.

Yenza isithombe sephrofayela esiyisikwele

Amathuluzi Ahlobene

• Shintsha Usayizi Wesithombe
• Cindezela Isithombe
• Zungezisa Isithombe
• Guqula Kube yi-Grayscale