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Advanced Imaging 7-1

Chapter 7 - Advanced
Imaging

Chapter Overview

Levels of Gray
Line Screens
Scanner Resolutions

Line Art Scanning
Halftone Scanning
TIFF, PICT, EPS Formats

Gamma Corrections
Enhanced Screening
Accurate Calibration Technology
Page Design

Typefaces and Fonts
Typeface Forms

Other Elements of Design

Orientation
Pitch
Point Size and x-Height
Spacing
Page Design Tips

Содержание Accel-a-Writer 812

Страница 1: ...of Gray Line Screens Scanner Resolutions Line Art Scanning Halftone Scanning TIFF PICT EPS Formats Gamma Corrections Enhanced Screening Accurate Calibration Technology Page Design Typefaces and Fonts...

Страница 2: ...7 2 Advanced Imagingbb ___________________________________ Notes...

Страница 3: ...page design with tips for adding finishing touches for a truly professional image Levels of Gray The resolution of a laser printer is measured in dots per inch dpi The resolutions on your Accel a Writ...

Страница 4: ...eens Knowing how many levels of gray you would like to achieve is one factor in determining the appropriate line screen to use Depending on the individual image quality some degree of experimentation...

Страница 5: ...olution of 2 times that of the line screen used if printing at 100 size For example if a line screen of 95 is used the scanner resolution should be set to 190 dpi 95 x 2 If that resolution cannot be s...

Страница 6: ...the formulas in the previous section Halftone Scanning Note Different versions of PageMaker may work differently See the application manual for details QuarkXPress only allows you to change the line s...

Страница 7: ...812 offers seven gamma settings 0 through 6 with 0 as the default Settings 0 through 5 progressively lighten the midrange values If you need a negative reverse image which is required by some printin...

Страница 8: ...Black White Input Levels Gamma 5 Black White 1 1 0 Output Levels Black White Input Levels Gamma 4 Black White 1 1 0 Output Levels Black White Input Levels Gamma 3 Black White 1 1 0 Output Levels Blac...

Страница 9: ...ault enhanced screen is setup under the MISC SCREEN menus If you use the software printer setup you can select the levels of gray and gamma settings simultaneously Gray level and line screen combinati...

Страница 10: ...he desired screen 6 Click OK 7 Click OK 8 Close the Control Panel window Accurate Calibration Technology XANT s Accurate Calibration Technology X ACT allows you easily to calibrate the printer s engin...

Страница 11: ...ustments can be done using XANT s Command Center In a Macintosh environment use the following procedure to calibrate line lengths and adjust the printer margins 1 Start Command Center by double clicki...

Страница 12: ...ter or longer than the measurement above the vertical scroll bar in figure 7 3 adjust the scroll bar until the measurement reads the exact length of your line 7 Click Update Print When the new page pr...

Страница 13: ...f the x axis is low move the x scroll bar right until you reach the desired number of units 13 Click Set Print An alignment page with new settings prints 14 Measure where the x and y axes cross If pos...

Страница 14: ...tal line If it is shorter or longer than the measurement to the right of the horizontal scroll bar fig 7 5 adjust that bar until the measurement reads the exact line length 8 Measure the vertical line...

Страница 15: ...m and 1 over from the left side of the page If the lines cross at the correct place skip to step 16 13 Use the x scroll bar to make x axis changes and the y scroll bar to make y axis changes fig 7 6 F...

Страница 16: ...pter deals with some of the language and elements used in desktop publishing page design Typefaces and Fonts Two very important terms to understand are typefaces and fonts These terms often are used i...

Страница 17: ...ch typeface category lends itself to particular areas of page design For example the small detailed lines on a serif typeface helps draw a reader s eye across a line of text This makes it well suited...

Страница 18: ...ue Palatino Bold Palatino BoldItalic Miscellaneous Palatino Italic Symbol Palatino Roman ZapfDingbats Times Bold Times BoldItalic Times Italic Times Roman ITC ZapfChancery MediumItalic Typeface Forms...

Страница 19: ...a cluttered appearance Other Elements of Design Other elements of design besides typeface forms include orientation pitch point size and spacing Orientation The terms portrait and landscape orientatio...

Страница 20: ...e number of characters which can fit horizontally within one inch For example your printer has the PCL typeface Courier 10 pitch 12 points Ten characters fit within an inch and the size is 12 points i...

Страница 21: ...ender the downward stoke within a character set fig 7 10 6Point 8 Point 10 Point 12 Point 14 Point 18 Point 24 Point 54 Point Ready 72 Point PostScript Ascender x Height Descender Fig 7 10 Point Sizes...

Страница 22: ...cters For example the letter l needs less space than a w Except for Courier the rest of your printer s resident PostScript typefaces are proportionally spaced Proportional spacing is more legible bett...

Страница 23: ...ext All capitalized text is much harder to read than mixed case text Vary paragraph lengths to help readers keep track of where they are on the page Keep most paragraphs to five lines or less to help...

Страница 24: ...7 24 Advanced Imagingbb ___________________________________...