Colour and appearance perceptions are very complex psychological phenomena. Written by one of the foremost authorities in the field, Principles of Colour and Appearance Measurement is a major two-volume work addressing the key topics required to understand the issues and manage colour effectively. The book addresses how objects appear to viewers, how viewers perceive colour, and the major types of instrumentation used to measure colour. Chapters detail the characteristics of light sources and object colour and appearance attributes. They encompass the complexities of human visual perception, including the various causes and types of colour blindness, and other unusual visual phenomena. The book also covers colour measurement instruments and methods, as well as fluorescence and whiteness. Principles of Colour Appearance and Measurement is a comprehensive resource for designers, colour technologists, colour quality inspectors, product developers, and anyone who uses colour in their work. - Addresses the key topics required to understand the issues of colour measure and management - Examines how viewers perceive colour and how objects appear to them - Reviews the major types of instrumentation used to measure colour

The measurement of colour is important in many commercial operations and professions, such as bleaching and colouration of textiles, applications of paints, dentistry and colouration of food products. This book will discuss colour measurement theories, the latest technological and scientific developments of measuring colour and the applications of colour measurement.Part one reviews the underlying theories, principles and methods of how to measure colour. It includes topics such as expressing colours numerically, camera based colour measurement, colour shade sorting and determining and improving the accuracy of colour measurement. Part two presents a selection of industrial applications illustrating the use of colour measurement in textiles, paint, teeth, hair and food.With its international range of contributors, Colour measurement: Principles, advances and industrial applications is beneficial to a variety of readers such as colour technologists, colour quality inspectors, product developers, dentists, cosmetologists and anyone who uses colour in their work. It will also be a valuable reference for academics and students studying design, fashion or colour related subjects. - Discusses colour measurement theories and the latest technological and scientific developments of measuring colour - Case studies illustrate camera based colour measurement and review visual and instrumental evaluation of whiteness and yellowness applications in industries including cosmetics and dentistry - Motivations for colour measurement are explored to answer questions raised as to why colours do not match and explain factors such as wet and dry fabric differences

2003 Paul Bunge Prize of the Hans R. Jenemann Foundation for the History of Scientific Instruments Judging the brightness and color of light has long been contentious. Alternately described as impossible and routine, it was beset by problems both technical and social. How trustworthy could such measurements be? Was the best standard of inten

Colour, Colour Measurement and Colour Change, the first new book in the expanded Science for Conservators series, explains the science of colour, colour measurement and colour change for conservators in a clear and comprehensible way, elucidating the topic for those with no scientific background. The book explains how and why we see colours and how colour and colour change can be measured, as well as clarifying why these would be done in a conservation context. It then examines the ways in which colour can change – such as darkening, yellowing, fading, blanching and patination – illustrating these in different types of cultural heritage materials, including metals, varnishes, plastics, textiles and paints. The final chapter explores how colour change can be reduced in different types of storage and display settings, and, in particular, what can be done to protect against damage by light, damp and pollutants. This book is an invaluable introduction to all aspects of the science of colour in conservation. It is suitable for students in undergraduate and postgraduate conservation programmes, as well as being a useful reference guide for practising conservators.

The classic authority on colour measurement now fully revised and updated with the latest CIE recommendations The measurement of colour is of major importance in many commercial applications, such as the textile, paint, and foodstuff industries; as well as having a significant role in the lighting, paper, printing, cosmetic, plastics, glass, chemical, photographic, television, transport, and communication industries. Building upon the success of earlier editions, the 4th edition of Measuring Colour has been updated throughout with new chapters on colour rendering by light sources; colorimetry with digital cameras; factors affecting the appearance of coloured objects, and details of new CIE colour appearance models. Key features: Presents colour measurement, not simply as a matter of instrumentation and engineering, but also involving the physiology and psychology of the human observer. Covers the principles of colour measurement rather than a guide to instruments. Provides the reader with the basic facts needed to measure colour. Describes and explains the interactions between how colour is affected by the type of lighting, by the nature of the objects illuminated, and by the properties of the colour vision of observers. Includes many worked examples, and a series of Appendices provides the numerical data needed in many colorimetric calculations. The addition of 4th edition co-author, Dr. Pointer, has facilitated the inclusion of extensive practical advice on measurement procedures and the latest CIE recommendations.

This collection of 23 contributions reviews the most common instruments for measuring food quality both on the processing line and in the laboratory. Each chapter describes an instrument's underlying principles with emphasis on aspects relevant to food applications, identifies the significance of the variables measured, and assesses the accuracy of the technique for specific food groups. The second edition adds eight chapters. Annotation copyrighted by Book News Inc., Portland, OR.

André Hoffmann, innovator, researcher and developer, pioneer in the field of optical technologies (photonics), systematically researched the tooth colour and its origin with highest precision (see publication in 2000). This book shows an excerpt of this systematic original research at human teeth and dental shade guides with high-precision measuring systems and high-precision positioning system in vitro. Due to his basic scientific research, he was able to quantify and isolate manifold factors influencing the colour of teeth. These include, for example, the light or measuring light and the type of light (illuminant) and illumination and colour temperature, the optical beam path of the light or the measuring geometry, the observation angle (2°, 10°), the size of the measuring surface, and measuring opening, the gloss, the liquid content (with scientific evidence of the relationship between liquid content and tooth colour), effect of drying, moisture and rehydration, the correlation between the liquid content and the gloss effect, the subjectivity of visual subjective shade matching, crown curvature, type of system (spectrophotometer, tristimulus colorimeter), measuring mode (contact or non-contact), system-object-relation, positioning, repeatability or reproducibility, lens shift, displacement between sample and measuring surface and further intra- and interindividual factors. In addition, subjective-visual determinations and objectified measurements were examined in subjective-objective comparisons using colour coordinates comparisons. All these influencing factors are investigated on moist, drying, drier (various specific dehydration and rehydration states) and dry teeth based on the brightness (L*), on colour measurement values, such as a*, b* (CIELAB), C*, h, (CIELCH), ΔE, on the metamerism index, on spectral values and curves, tabs of dental shade guides and on tooth colour spaces ... As part of this exploration, phenomena (e.g. changes and breaks in behaviour as well as highly individual developments in colour values, paradoxes between the values of subjective determination using shade guides and the values of objective measurements) were identified and insights into the very complex colour dynamics through dehydration and rehydration were shown (up to more than >8 days). The development of the individual colour measurement values was based on the liquid flow through the tooth and its tissues, in particular during drying and rehydration, and gave information about dynamics and the temporal extent of these processes. On the basis of this data, Hoffmann had developed several methods for research and practice, suggestions for feasible innovations, such as monitoring of dental treatment to protect against pulp damage based on drying, and reconstructing the colour of naturally moist teeth on those that have already dried, the identification of the living and the dead, human and animals via the "dental fingerprint" and a novel method of measuring the time of death for forensic medicine. He also described a time limit of drying up to which relatively natural, suitable colour values and shade matching results can be obtained and after which no colour determination should be carried out; and he established the rehydration time after the end of the drying or dental treatment, which must be waited in order to regain a natural tooth colour and to get correct values and results again. His findings also show that teeth are able to store information on, for example, the condition (liquid content, colour values) and the time within the drying and liquid re-absorption chronology. The author articulates a "dental chronometer" ("tooth clock"), "dental data store" ("tooth data store") and a "dental memory" ("tooth memory") and believes that significant progress in this field may include and could be achieved via a neural network for colour measurement apparatus. A book for anyone interested in the natural sciences.