Desktop PublishingCarnegie-Mellon University

Spring 2001

• Dave WattersonArt Director, GATF

• wttrsn@aol.com

• dwatterson@gatf.org

Welcome to Desktop Jeopardy!

• 3 teams

• 2 questions to each team

• Each question worth 10 points

• If that team misses you have the opportunity to steal

1. The basic colors that are used in color process

printing are __________ _________ __________

__________

2. Your monitor uses the _____________ color model

3. The combination of red, green and blue colors on screen can produce more

than _____________ million colors.

4. The file size of a 72 dpi file that is increased to 144 dpi will be ________

times the size of the original.

5. For printed material to display natural looking

halftones it is recommended that the

image dpi is ______

times the line screen used in

the printing method.

6. In QuarkXPress the tool needed to edit elements within a selected text or

picture box is the __________ tool.

File Format Overview

Raster vs. Vector

• All computer images come in either Vector or Bitmap formats

• Each has it’s own advantages and disadvantages

Raster or Bitmapped Images

• Image defined pixel by pixel and its resolution is fixed

• They are called resolution dependent

Vector/Illustration Images

• A vector or object-oriented image is a mathematical equation where each object is defined by points connected by paths.

• They are resolution independent

Vector-Based Applications

• Adobe Illustrator

• Macromedia Freehand

• CorelDraw

• These images can be save in a variety of formats so that they can be used and displayed in other in other types of programs

Resolution Independent

• They retain their characteristic shapes at different sizes and output resolutions

File Formats for Web

• GIF (.gif)

• JPEG (.jpg)

TIFF files in QuarkXPress

• Image Control: One-bit (black& White) and grayscale images can be assigned a color in Xpress. A grayscale TIFF can also be edited with contrast and halftone commands in the Style menu

TIFF files in QuarkXPress

• File Size and Compression: Typically uncompressed TIFFs are about 20% smaller than EPS files. A TIFF can be saved with non-lossy LZW compression to make their file sizes smaller.

TIFF files in QuarkXPress

• Onscreen Display: Xpress generates a low-resolution proxy to preview an imported TIFF. The quality of this preview depends on preset preferences.

TIFF files in QuarkXPress

• Cropping: If you crop a TIFF inside Xpress, the printer processes only the viewable data

TIFF files in QuarkXPress

• Downsampling: QuarkXPress will downsample all TIFFs to two times the halftone screen frequency

EPS files in QuarkXPress

• An EPS file can be a bitmap/raster or an object-oriented/vector graphic depending on which program was used to generate the EPS.

EPS files in QuarkXPress

• Image Control: An EPS graphic has already been converted to PostScript Which means that this is a locked file

EPS files in QuarkXPress

• File Size and Compression: An EPS file is typically 20% larger than an uncompressed TIFF file

EPS files in QuarkXPress

• Onscreen Display: The preview is built into the structure of the PostScript. The speed of the display is dependant upon the preview option chosen when creating the EPS file

EPS files in QuarkXPress

• Cropping and Downsampling: Xpress always sends everything to the printer. This can significantly increase the printing time.

Contacting me

• I don’t have an office on campus and really work all day

• Please e-mail me and I will set up a meeting time as quickly as possible

Thanks for your attention!

Now let’s head over to the lab

(CFA Room 318)