Francis Edward Mitchell. / Thesis (M.Phil.)--Chinese University of Hong Kong, 1995. / Includes bibliographical references (leaves 80-81 (2nd gp.)). / Acknowledgments --- p.iii / Summary --- p.iv / Introduction --- p.1 / Sharpness and contrast --- p.2 / Causes of unsharpness --- p.3 / Chapter i) --- Photographic unsharpness --- p.3 / Chapter ii) --- Movement unsharpness --- p.6 / Chapter iii) --- Geometric unsharpness --- p.8 / Chapter iv) --- Exposure unsharpness --- p.12 / Contrast factors --- p.15 / Chapter i) --- Subject/object contrast --- p.15 / Chapter ii) --- Radiation --- p.16 / Chapter iii) --- Film and screen --- p.18 / Chapter iv) --- Subjective --- p.20 / "How do we see ""Sharpness & Contrast"" ？" --- p.21 / Factors in perception --- p.26 / Chapter i) --- The individuals eyesight (and age) --- p.26 / Chapter ii) --- Light intensity --- p.26 / Chapter iii) --- Colour --- p.27 / Chapter iv) --- Pupil diameter --- p.27 / Chapter v) --- Size and shape of the object --- p.28 / Chapter vi) --- Eccentricity --- p.28 / Chapter vii) --- Edge enhancement --- p.29 / Chapter viii) --- Background luminance --- p.30 / Chapter ix) --- Maximising information retrieval from an image --- p.30 / Experiment I - Production of an image with controlled sharpness and contrast --- p.31 / Chapter i) --- Choice of film & cassette --- p.31 / Chapter ii) --- Prevention of movement unsharpness --- p.34 / Chapter iii) --- Prevention of parallax --- p.34 / Chapter iv) --- Control of penumbra --- p.35 / Chapter v) --- Verification of image unsharpness --- p.40 / Control of contrast --- p.46 / Radiography of test objects --- p.48 / Experiment II - Perception of sharpness at different contrast levels --- p.53 / Chapter i) --- Experiment --- p.53 / Chapter ii) --- "Viewing the data in terms of ""sharpness""" --- p.56 / Chapter iii) --- Viewing the data in terms of contrast levels --- p.61 / Analysis of data from an expanded group size (N=55) --- p.66 / Experiment III - Effect of room lighting conditions on the perception of sharpness --- p.69 / Overall conclusions --- p.78 / Bibliography --- p.79 / References --- p.80 / Appendix A (VBV calculation) --- p.82 / Appendix B (Line-pair test-tool) --- p.83 / Appendix C (Scattered radiation) --- p.85 / Photo-electric --- p.85 / Compton --- p.85 / Pair-production --- p.85 / Net result --- p.86 / Appendix D (Metal discs) --- p.87 / "Appendix E (OFD, magnification and penumbra)" --- p.88 / Appendix F (Processor developer temperature) --- p.90 / Appendix G (Viewing contrast-sharpness data) --- p.91 / Appendix H (Viewing conditions) --- p.92 / Appendix I (Comparison of data - light and dark viewing conditions) --- p.94 / Appendix J (Curix film & screens) --- p.97