5mage Resolution Ror Continuous-Tone Scans - PDF document

2. 5mage Resolution Ror Continuous-Tone Scans WontinuousAhony or BiAtonulS WontinuousAhony or BiAtonulS Dytyrmining Rysolution gyttings for BiAtonul gwuns 5. Charts, Graphs, and 9aps drypuring Whurts und Gruphs Antiwiputing thy Effywts of Ryduwing Imugy gizy hhyry ury syvyrul fuwtors to wonsidyr whyn uttympting to ryproduwy illustrutions in printyd booksB euulity of originul illustrutions is forymost, but wy ulso wonsidyr swunning rysolution, thy pupyr books will by printyd on, und printing pryssysB Fuilury to wonsidyr uny ony of thysy fuwtors wun lyud to problyms whyn books ury on pryss und to disuppointmynt with �nishyd booksB ho uvoid this, wy pry fyr to hundly swunning your photogruphs und illustrutionsB If this is not possibly, huvy u profyssionul gruphiw urts syrviwy buryuu swun your urt to spywi�wutions bylowB drints from digitul �lys, submittyd us urt to by swunnyd, ury not uwwyptublyB gwuns thut do not myyt thysy guidylinys muy by ryjywtydB hhy guidylinys syt forth in this dowumynt pyrtuin striwtly to bluwk und whity digitul urtB What 5s Digital Art? Digitul urt is uny imugy thut hus byyn wupturyd through swunning or digitul photogruphy, or thut hus byyn wryutyd using u softwury progrumB Types oR Digital Art: Scans and Computer-Based Drawings Scans gwuns (or bitmup �lys) ury imugys womposyd of pixyls—thy smullyst building blowks of bitmuppyd urtB hhy �gurys on thy right show two busiw typys of swunsB Figury EBE is u won tinuousAtony swun, und �gury EB2 is u biAtonul swunB continuous-tone scans 8-Nit In wontinuousAtony swuns, yuwh pixyl is ony of 25J shudys of gruy, runging from pury whity to solid bluwkB Bywuusy yuwh pixyl wun vury in tonulity, trunsitions from light to durk ury smooth und ryulistiw—us long us thy resolution is high ynoughB dhotogruphs und druwings with �ny trunsitions bytwyyn light und durk, suwh us �gury EBE , ury idyul wundidutys for wontinuousAtony Ni-tonal scans 1-Nit In biAtonul swuns, yuwh pixyl wun by only ony of two vuluys: EDD% bluwk or EDD% whityB Imugys thut luwk gruy vuluys, suwh us �gury EB2 , ury good wundidutys for biAtonul swunningB Computer-Based Drawings Whurts, timylinys, gruphs, und othyr quuntitutivy informu tion–busyd imugys ury oftyn wryutyd (us opposyd to bying swunnyd) using u vywtorAbusyd druwing uppliwutionB VywtorA busyd druwing uppliwutions build imugys by using muth ymutiwul formulus to dyswriby points, linys, und shupysB inliky swuns, whiwh dypynd on propyr rysolution for ryulis tiw ryndyring, vywtor gruphiws ury rysolution indypyndynt und wun by ynlurgyd to uny sizy without loss of quulityB gyy �gury EBG resolution The numNer oR pidels per unit oR measure to Rorm an image. 5n the Anited States, image resolution is calculated per inch, hence the aNNrebiation ppi. Digital Art 1. ;berbiew FigB EB2 FigB EBE FigB EBG tip on terminology Continuous-tone images are oR ten reRerred to as tphotographs.w 5n AdoNe Photoshop, the term Grayscale is used 9enu: 5mage Bi-tonal images are oRten reRerred to as tline artw or tmonochromew images. 5n AdoNe Photoshop, the term Bitmap is used 9enu: 5mage  9ode . Figury EBE: aigrunt aothyr by Dorothyu LungyB Wourtysy of thy iBgB Furm gywurity Administrution Wollyw tion, Librury of WongryssB Figury EB2: Druwing by RB Duly GuthriyB Rigure 2.1 Exumply of u propyrly swunnyd, gruyswuly photogruph ut GDDppiB hhis rysolution sytting is suitubly for highAquulity offsyt print produw Rigure 2.2 Exumply of u photogruph swunnyd ut 72ppi, ry sulting in un imugy thut uppyurs blurry or out of fowusB pidelation is unothyr phynomynon ussowiutyd with u lowArysolution swunB LowA rysolution syttings ury not suitubly for printB Rigure 2.3 Exumply of u lowArysolution swun to whiwh ryso lution hus byyn urti�wiully uddydB Determining Resolution Settings Ror Continuous-Tone Resolution Scans Sabe all scans in the T522 or EPS Rormat. Rysolution is u mujor fuwtor in dytyrmining thy quulity of ull swunsB Rysolution is thy numbyr of pixyls pyr unit of myusury (inwhys, in thy inityd gtutys, hynwy thy ubbryviution ppi) usyd to form un imugyB In gynyrul, photogruphiw swuns intyndyd for print usugy should by ut lyust GDDppi ut thy �nul sizy for ryproduwtionB Rysolution should by dytyrminyd ut thy swunning stugy busyd on thy quulitiys of thy originuting imugy: (E) whythyr it is wontinuousAtony or biAtonul und (2) thy sizy of thy originulB For furthyr guidunwy, syy thy tubly bylowB 2. 5mage Resolution Ror Continuous-Tone Scans Rysolution (ppi) gmullyr thun 5 x 7 L x ED Continuous-Tone or Bi-tonal? ho dytyrminy whythyr you should swun your originul urt in wontinuousAtony mody (LAbit) or in biAtonul mody (EAbit), wonsidyr thy following: 5R your original is a photograph or xne art drawing that contains multiple lebels oR gray tones, you should scan the original in continuous-tone mode 5R the original is a line drawing without gray tonalities, and consists oR only NlacW and white lines and shapes, you should scan the original in Ni-tonal mode FigB 2BG – gwunnyd ut 72ppi; with rysolution urti�wully in wryusyd to GDDppiB (Wompury thy wirwlyd uryus in thy �gurysB Noty thut thyry is littly improvymynt in dytuil in �gB 2BG uftyr (Noty thy pixylizyd ydgys und loss of dytuilsB) Digital Art pidelation A phenomenon in Nitmap images that results Rrom insuRxcient resolution or ober-en largement. 5ndibidual pidels Necome bisiNle, especially on the edges oR oNVects, creating a stair-stepped or Vagged looW. FigB BE – criginul sizy whurt byfory ryduwtion line rules Bounding rulys thut uppyur thin in thy ryduwyd imugy muy fudy und disuppyur whyn printydB ruly sizy should by no smullyr thun E pt in thy lurgy originulB hhy boldnyss of rulys thut ury too thiwk dutu wolumns udds unnywyssury ymphusisB hhy ruly sizy should by no lurgyr thun 2 pts in thy lurgy originulB Ronts Wolumn und row hyudings thut ury lygibly ut full sizy muy bywomy unryudubly whyn ryduwyd to �t in u bookB If you ury working with ovyr sizyd urt, ryduwy your printouts to thy width thut will by usyd in thy book to muky sury your typy is wlyurB isy ony font throughout thy �guryB If two dif fyrynt sizys ury utilizyd, thyy should vury from yuwh othyr only slightly (yBgB, ED pt und E2 pt, not ED pt und EL pt)B Font stylys should by usyd spuringlyB Gynyr ully, thyry is no ryuson to usy bold or ituliwB usy ull WAdg us this dywryusys ovyrull lygibilityB FigB B2 – Illygibly whurt uftyr ryduwtion tint bariations hint vuriutions thut ury not yusily distinguish ubly from yuwh othyr muy wonfusy thy ryudyrB ho uvoid idyntiwul wolumns or gruph points, usy Lygibility of thy uwwompunying whurt lygynds und kyys should ulso by won�rmydB Preparing Charts and Graphs: EdhiNit B Anticipating the ERRects oR Reducing 5mage Sife Digital Art