Psychometric Scaling: A Toolkit for Imaging Systems Development by Peter G. Engeldrum
201 pages, hardcover, Imcotek Press, ISBN 0967870607. List price $94.95 includes CD-ROM with MathCad®, V7.0, work sheets!
Image Quality: Seldom a "Front-Burner"
The market is not kind to products that do not perform properly. Although one may debate which aspect of an imaging product's performance is most important, virtually every list of performance attributes will include image quality. In spite of how important image quality is to a product's success, researching image quality and establishing image quality targets is seldom given "front-burner" attention.
Humans as Measurement Tools
One reason, of course, is that image quality cannot be directly measured the way other performance aspects such as imaging speed or compression ratios or MTF can be measured. To obtain print and image quality appraisals, one must rely on human observers-using methodologies and theoretical concepts that are foreign to many "hard-science" product developers and R & D staffers.
We Don't See Dots Per Inch or Magapixels
The crux of the problem is that, while we may know, for instance, an imaging system's addressability, customers do not see dots per inch or megapixels. They see sharpness, jaggedness, or some other related "ness." Psychometric Scaling: A Toolkit for Imaging Systems Development shows how to include human observers in image quality appraisal studies, and put image and print quality evaluation programs on solid theoretical and methodological underpinnings.
Fully Worked Examples Included on CD-ROM
Psychometric Scaling: A Toolkit for Imaging Systems Development is supported by sixteen fully worked MathCad® worksheets that demonstrate the techniques with real data. Readers can use the MathCad exercises as models for creating their own scaling studies, or can plug their own study data into the work sheets to generate their own scales.
Compete Against the Giants with the Tools
In addition to identifying the theoretical foundation for image quality scaling studies and leading product development professionals through step-by-step applications of the theory, Psychometric Scaling: A Toolkit for Imaging Systems Development provides a model for integrating scaling study findings into the product design process in a meaningful way. The mechanism for linking human input to the product development process is Imcotek's Image Quality Circle, a development process in use by some of the most successful companies in the imaging industry. The Image Quality Circle is a process or framework which helps to understand, specify, and manage the quality performance of imaging systems.
The Author-Peter G. Engeldrum is an internationally renowned consultant and educator in the fields of image quality and color science. Engeldrum was adjunct faculty in the Center for Imaging Science at the Rochester Institute of Technology, where he also received BS and MS degrees.
Chapter 1 Image Quality and Psychometric Scaling
Chapter 2 The Image Quality Circle
Chapter 3 The Process of Scaling and Some Practical Hints
Chapter 4 Measurement Scales
Chapter 5 Thresholds and Just Noticeable Differences
Chapter 6 Ordinal Scaling
Chapter 7 Direct Interval Scaling
Chapter 8 Indirect Interval Scaling-Case V and Paired Comparison
Chapter 9 Indirect Interval Scaling-Generalization of Thurstone-CaseV
Chapter 10 Indirect Interval Scales-Category Scaling Methods
Chapter 11 Ratio Scaling
Chapter 12 Selecting the Best Method
Plus CD-ROM with sixteen MathCad® sheets for generating scales from your data.
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