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A Guide To Color Separation

The transformation of photographic originals into realistic and compelling printed images is the most challenging test of digital publishing technology. In the past few years, however, the digital publishing industry has met this challenge with impressive results. Scanners, image processing software, halftoning processes, color calibration systems, and other tools have all been fine-tuned to the extent that, today, we can say that digital image processing and color separation methods can meet and surpass the quality possible with traditional analog techniques.

In the past few years, these tools have also moved from the shops of color professionals onto the desktops of graphic designers and digital artists, giving those craftspeople unprecedented control over--and unprecedented responsibility for--the quality of the final output. Designers striving for quality color reproduction can still benefit from the services of a professional prepress shop. But the designer must understand enough about the process to make wise judgments about what can and cannot be done in-house, and to communicate knowledgeably with outside color professionals about services that have been entrusted to them.

Successful reproduction of color images depends on a number of factors, starting with the characteristics of the original photograph. The scanning, color correction, halftoning, and printing processes each have their own effects on the outcome. This book provides a basic instruction to all these processes. Some of the required skills, such as digital editing and color correction, rely to a great extent on the experience and judgment of the person doing the job, and cannot be taught in a book like this one. Our goal here is to present enough fundamental information so that you can ask the right questions at each step in the digital prepress process. You may purchase this and other publications using our convenient online order form.

Table of Contents

2. Choosing an Original
3. Scanners
4. Resolution
6. Sharpening Filters
8. Color Systems
10. Color management and Calibration
12. Color Correction
14. Screening Technologies
16. Color Printing Technologies
18. Duotones, Tritones, and Quadtones
20. Bit Depth
21. File Formats
22. Dot Gain
23. UCR/GCR
24. Color Proofing Systems
25. Compression
26. Systems for Image Processing
27. Storing Image Files
28. Glossary/ Index



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