Computer Graphics: launi zurfin

Don kwanan wata fasaha da kuma kayan aiki da damar yin haka mai haske da kuma m image cewa shi zai kasance ma fi kyau fiye da ya real samfur. A ingancin da daukar kwayar cutar image dogara da dalilai da dama: da yawan Megapixels, image size, image size da sauransu. Wadannan sun hada da wani dukiya - da launi zurfin. Mene ne shi, da kuma yadda za a samar da da kuma lissafi?

Overview

Launi zurfin - matsakaicin yawan inuwõyinta suna kusa, launi da cewa zai iya kawai dauke da hoton. Wannan yawa da aka auna a ragowa (yawan binary ragowa da cewa sanin da launi da kuma dafa na kowane pixel a wani raster graphics image). Alal misali, daya pixel, da launi zurfin ne daidai da 1 bit iya xaukar biyu dabi'u: da fari da baki. Kuma da mafi muhimmancin zai zama launi zurfi, da image za a iya bambanta, hada da wani jam'i na launuka da tabarau. Ita ce kuma ke da alhakin image aminci. A nan, duk abin da yake wannan hanya: mafi girma, mafi alhẽri. Kamar yadda wani misali, GIF format hoto tare da wani launi zurfin 8 ragowa, zai dauke da 256 da launuka, yayin da JPEG format image tare da zurfin 24 ragowa zai hada da miliyan 16 launuka.

A bit na RGB da CMYK

Yawanci, duk da image data tsare-tsaren da launi zurfin 8 ragowa da daya tashar (launi). Amma a cikin hoto na iya zama ba, kuma mahara launi tashoshi. Sa'an nan riga jawo RGB uku tasha da za a yi zurfin 24 ragowa (3h8). Zurfin CMYK launi images iya zama har zuwa 32 ragowa (4x8).

Amma duk da haka kadan

A launi zurfin - da yawan inuwõyinta suna kusa guda launi, wanda na'urar a cikin lamba tare da hotuna, za a iya haihuwa ko haifar. Wannan siga ne ke da alhakin m miƙa mulki na inuwõyinta suna kusa, a cikin hotuna. All dijital images sauya ta hanyar wadanda kuma zeros. Zero - black, Unit - White. Adana da kuma kiyaye su ba, a cikin memory aka auna a bytes. Daya byte ƙunshi 8 ragowa, wanda aka denoted da kuma launi zurfin. Domin dijital kyamarori, akwai wani definition na matrix ne zurfin launi. Wannan sigar nuna alama cewa kayyade har zuwa abin da cikakken da kuma zurfin image cikin sharuddan inuwõwi da launuka iya nuna wani kamara, kuma mafi musamman ta matrix. Saboda da darajar da wannan siga, da hotuna ne ƙato da kuma m.

yarda

The mahada tsakanin launi zurfin da image quality ne ta ƙuduri. Alal misali, 32-bit image da wani ƙuduri na 800x600 ne muhimmanci mafi muni fiye da irin wannan 1440x900. Lalle ne, a karo na biyu idan shi da hannu a yawa ya fi girma yawan pixels. Wannan shi ne quite sauki su sa ka nasu. All kana bukatar ka yi - shi ne don zuwa PC a cikin "Image gyara" da kuma kokarin consistently rage ko kara allon ƙuduri. A wannan tsari, za ka fili tabbatar nawa da ƙuduri rinjayar ingancin da daukar kwayar cutar images. Ko da ta yaya yawa launuka hada da wani musamman image, shi za a iyakance zuwa iyakar darajar wanda yake iya goyon bayan mai saka idanu. Kamar yadda wani misali ba za mu iya yi duba da 16 bit launi zurfin da image da 32 ragowa. Wannan hoton a duba zai nuna irin wannan 16 bit launi zurfin.