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CONTENTS 1. Introduction 1.1 Course Outline 1 1.2 Introduction ...

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Full Module Title: IMAGE QUALITY VERSION 2<br />

Short Module Title: IMAGE QUALITY<br />

Module Code: 2DPI616 Module Level: 6<br />

Academic Credit Weighting: 15 credits. Length: 1 semester<br />

Module Leader: Sophie Triantaphillidou extension: 4584 e-mail: triants@wmin.ac.uk<br />

School:<br />

Media, Art and Design.<br />

Department:<br />

Photographic and Digital Media<br />

Host <strong>Course</strong>:<br />

BSc(Hons) Photography and Digital Imaging<br />

Status:<br />

Option<br />

Pre-requisites:<br />

None.<br />

Co-requisites:<br />

None.<br />

Assessment:<br />

40% Written <strong>Course</strong>work<br />

60% Practical Work<br />

Summary of Module Content:<br />

The issue of image quality is examined in the context of analogue and digital imaging systems.<br />

Objective measurements of spatial and noise characteristics are explored. Image Quality metrics are<br />

introduced. Subjective/ psychophysical methods for measuring image quality are introduced.<br />

Module Aims:<br />

• To gain an understanding of issues relating to the measurement of image quality, distortion and<br />

fidelity in the evaluation of imaging systems and processes.<br />

• To explore noise measures such as variance, signal-to-noise and autocorrelation function.<br />

• To establish the application of Fourier theory to the measurement and analysis of spatial<br />

frequency response and noise power of imaging systems.<br />

• To introduce psychophysics and psychometric scaling for the subjective evaluation of image<br />

quality.<br />

• To develop an understanding of image quality metrics along with the interrelationships between<br />

perceived and measured image quality in the evaluation of imaging systems.<br />

• To gain an understanding of the influence of scene dependency in image quality judgements.<br />

• To provide students with self-directed and focused practical work, to allow them to gain<br />

experience in setting up and analysing objective and subjective experiments related to image<br />

quality.<br />

Learning Outcomes:<br />

The successful student will be able to:<br />

<strong>1.</strong> Demonstrate an understanding of the relationship between image distortion, fidelity and quality<br />

measurements.<br />

2. Demonstrate knowledge of image quality metrics in the determination of the performance of<br />

imaging systems.<br />

3. Evaluate image attributes such as sharpness and noise using objective evaluation measures such<br />

as modulation transfer functions and noise power spectra.<br />

4. Understand and use psychophysical methods and apply related statistical analysis for the<br />

evaluation of image quality.<br />

5. Understand the importance of image selection and experimental set-up in psychophysical<br />

investigations.<br />

Indicative syllabus content:<br />

Image Sharpness: Review of the Fourier transform, Measurement of the Modulation Transfer Function<br />

(MTF) in digital devices.<br />

Image Noise in digital systems: The measurement of Noise Power. Application of Noise-Power and<br />

MTFs: The transfer of noise power in imaging systems.<br />

DPI_Hbook 79 ©University of Westminster

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