txheej txheem ntawm halftone luam ntawv tau qhia hauv Is Nrias teb los ntawm Upendrakishore Ray ntawm U. Ray thiab Cov Tub.
Leej twg invented halftone printing?
William Henry Fox Talbot (British, 1800–1877) tau tsim thiab patented nws siv cov ntxaij lim dej hauv xyoo 1852. Talbot, Georg Meisenbach (German, 1841–1912), Frederic Ives (Asmeskas, 1856–1937), thiab Max Levy (Asmeskas, 1857–1926) tuaj yeem suav hais tias yog cov neeg txhawb nqa loj rau kev txhim kho cov txheej txheem luam ntawv halftone.
Leej twg qhia halftone dub?
Ib qho ntawm thawj qhov kev sim yog los ntawm William Leggo nrog nws cov leggotype thaum ua haujlwm rau Canadian Illustrated News. Thawj daim duab ib nrab yog ib daim duab ntawm Tub Vaj Ntxwv Arthur luam tawm thaum Lub Kaum Hli 30, 1869.
Hluas nkauj ua li cas?
txheej txheem Halftone, hauv kev luam ntawv, txheej txheem ntawm kev rhuav tshem cov duab rau hauv cov dotsthiaj li rov tsim dua cov suab nrov ntau ntawm cov duab lossis cov duab kos duab. Kev tawg feem ntau yog ua los ntawm ib qho screen ntxig rau ntawm lub phaj raug nthuav tawm.
Dab tsi yog ib qho duab ib nrab?
Kev txhais: Feem ntau cov duab, duab kos duab, lossis cov duab zoo sib xws uas luam tawm hauv phau ntawv, ntawv xov xwm thiab ntawv xov xwm tau luam tawm ua ib nrab. Nyob rau hauv ib nrab suab, lub suab nrov ntawm daim duab raug tsim tawm yog tawg mus rau hauv cov kab sib npaug sib npaug ntawm qhov sib txawv ntawm qhov sib txawv, luam tawm tsuas yog ib qho xim ntawm tus number case.
