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Xante Accel-a-Writer 812 User Manual

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Download this manual See also: Troubleshooting Manual, Maintenance Manual
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
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Advanced Imaging 7-1

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Summary of Contents for Xante Accel-a-Writer 812

  • Page 1: Chapter 7 - Advanced Imaging

    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...
  • Page 2 Notes 7-2 Advanced Imagingbb ___________________________________...

  • Page 3: Levels Of Gray

    Introduction To take full advantage of your Accel-a-Writer 812’s high resolution and make your images look their best, it is important that you understand levels of gray, line screens, scanner resolutions, and their uses within specific applications. The first half of this chapter explains what levels of gray and line screens are and how to work with them to achieve the best possible quality of output.

  • Page 4: Line Screens

    Keep in mind that the higher the lines per inch, the tighter the screen on the image will be. To produce higher levels of gray without using a lower line screen, you must print at a higher dpi. An illustration of this would be to print the same image at the Accel-a-Writer 812’s 1200 x 1200 dpi with the same 75 line screen.

  • Page 5: Scanner Resolutions

    Scanner Resolutions Another way to insure high quality output for your images is to determine the optimum scanning resolution. Line Art Scanning For line art, the optimum scanning resolution would be at the same resolution as the output device, especially when reproduced at the same size.

  • Page 6: Gamma Corrections

    TIFF, PICT, EPS Formats After scanning the image, you need to decide the format in which to save it. The three most popular formats are TIFF (Tagged Image File Format), PICT (from Picture), and EPS (Encapsulated PostScript) files. If you use a scanning application such as Photoshop, make sure to choose the appropriate line screen under Page Setup before saving the image.
  • Page 7 For example, if a scanned image is too dark, you can use the printer’s front panel or use the software printer setup to select a new gamma setting to lighten and enhance the details. Gamma correction brings out details that can be lost when printing at higher line screens or when dark photos are scanned.
  • Page 8 Gamma 1 Gamma 2 Input Levels Input Levels Black White Black White Gamma 3 Gamma 4 Input Levels Input Levels Black White Black White Gamma 5 Gamma 6 Input Levels Input Levels Black White Black White Fig. 7.2 Gamma Corrections 1 through 6 7-8 Advanced Imagingbb ___________________________________...

  • Page 9: Enhanced Screening

    If you use gamma corrections in combination with XANTÉ’s new enhanced screening technology, you can further fine tune your output quality. See “Levels of Gray” earlier in this chapter and the next section, “Enhanced Screening,” for more details. Enhanced Screening XANTÉ’s enhanced screening allows you to select from the normal (default) or the enhanced screens defined by 145, 197, or 256 levels of gray using either the printer’s front panel or via software printer...

  • Page 10: Accurate Calibration Technology

    Click Options…. The Options window appears Select the desired screen. Click OK. The print dialog box reappears. Click Print. In a PC environment, use the following procedure to select the enhanced screens. Start your Windows application. Go to the Control Panel and select Printers. Click Setup….
  • Page 11 Working with X•ACT varies depending on if you are in a PC or Macintosh environment. Also, after you adjust the printer’s line length, you need to adjust the printer’s margin setting accordingly. Both adjustments can be done using XANTÉ’s Command Center. In a Macintosh environment, use the following procedure to calibrate line lengths and adjust the printer margins.
  • Page 12 Measure the horizontal line. If it is shorter or longer than the measurement shown underneath the horizontal scroll bar in figure 7.3, adjust the scroll bar until the measurement reads the exact length of your line. Measure the vertical line. If it is shorter 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.
  • Page 13 Click Set & Print. An alignment test page prints giving current printer settings at the bottom. Measure where the x and y axes cross. They should cross 1" up from the bottom and 1" over from the left side of the page. If the lines cross at the correct place, skip to step 15.
  • Page 14 Select X•ACT… from the Controller menu. The following screen appears. Fig. 7.5 The X•ACT Screen Select the media size you are using from the Paper menu (Fig. 7.5). Click Update/Print. A page prints with a horizontal and a vertical line on it. Measure the horizontal line.
  • Page 15 Select Align Paper… from the Controller menu. The following screen appears. Fig. 7.6 Align Printer Margins Click Print Test. An alignment test page prints giving current printer settings at the bottom. Measure where the x and y axes cross. They should cross 1" up from the bottom and 1"...

  • Page 16: Page Design

    Click Close when both axes are correct. Then, select Quit from the File menu to exit Command Center. Page Design Advanced imaging includes not only the mechanical side of printing, but also the elements of page design. Your Accel-a-Writer 812 with true Adobe PostScript takes care of most of the mechanical side, allowing you such freedom as scaling, rotating, and filling text and graphics.
  • Page 17 PostScript PostScript Sans Serif (Helvetica) Serif (Times Roman) Fig. 7.7 Serif and Sans Serif Typefaces Serif typefaces include extra flourishes such as the small circle at the top of the a or the small tails hanging down each end of the cross bar in the T in Times Roman (fig.

  • Page 18: Typeface Forms

    Serif Sans Serif Helvetica Courier Helvetica-Bold Courier-Bold Helvetica-BoldOblique Courier-BoldOblique Helvetica-Oblique Courier-Oblique ITC Bookman-Demi Helvetica-Narrow ITC Bookman-DemiItalic Helvetica-Narrow-Bold Helvetica-Narrow-BoldOblique ITC Bookman-Light Helvetica-Narrow-Oblique ITC Bookman-LightItalic NewCenturySchlbk-Bold ITC AvanteGarde-Book ITC AvanteGarde-BookOblique NewCenturySchlbk-BoldItalic NewCenturySchlbk-Italic ITC AvanteGarde-Demi ITC AvanteGarde-DemiOblique NewCenturySchlbk-Roman Palatino-Bold Palatino-BoldItalic Miscellaneous Palatino-Italic Symbol ( Palatino-Roman ZapfDingbats ( Times-Bold...

  • Page 19: Other Elements Of Design

    Bold, demi, medium, and light forms are created by varying the stroke weight (density) of character lines. For example, the following note has a bold italic introduction to draw attention, but the body text switches back to a medium weight (sometimes referred to as roman) format for easy readability.
  • Page 20 Pitch Pitch, sometimes referred to as cpi or characters per inch, indicates the 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 in height.

  • Page 21: Point Size And X-Height

    Point Size and x-Height Point size comes from an old typesetting term for a typeface’s height. This is measured from the top of highest ascender (the upward stroke on a character) to the lowest descender (the downward Ready stoke) within a character set (fig. 7.10). 6 Point 8 Point 10 Point...

  • Page 22: Page Design Tips

    Spacing Character spacing has two forms, monospacing and proportional spacing (fig. 7.11). Monospaced characters have equal spacing between each letter which is sometimes referred to as fixed spacing. An excellent example is the resident Courier typeface. Monospacing has a mechanical, block look and works extremely well for spreadsheets where multiple columns of numbers need to be aligned.
  • Page 23 • Always consider your audience first. For example, readers with visual problems or youngsters learning to read will respond better to larger point sizes. A conservative group of investors would be more impressed by a tradition typeface like Times Roman, while accountants may prefer Courier. •...
  • Page 24 7-24 Advanced Imagingbb ___________________________________...

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