2,315 research outputs found

    Computer mediated colour fidelity and communication

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    Developments in technology have meant that computercontrolled imaging devices are becoming more powerful and more affordable. Despite their increasing prevalence, computer-aided design and desktop publishing software has failed to keep pace, leading to disappointing colour reproduction across different devices. Although there has been a recent drive to incorporate colour management functionality into modern computer systems, in general this is limited in scope and fails to properly consider the way in which colours are perceived. Furthermore, differences in viewing conditions or representation severely impede the communication of colour between groups of users. The approach proposed here is to provide WYSIWYG colour across a range of imaging devices through a combination of existing device characterisation and colour appearance modeling techniques. In addition, to further facilitate colour communication, various common colour notation systems are defined by a series of mathematical mappings. This enables both the implementation of computer-based colour atlases (which have a number of practical advantages over physical specifiers) and also the interrelation of colour represented in hitherto incompatible notations. Together with the proposed solution, details are given of a computer system which has been implemented. The system was used by textile designers for a real task. Prior to undertaking this work, designers were interviewed in order to ascertain where colour played an important role in their work and where it was found to be a problem. A summary of the findings of these interviews together with a survey of existing approaches to the problems of colour fidelity and communication in colour computer systems are also given. As background to this work, the topics of colour science and colour imaging are introduced

    What You See Isn\u27t Always What You Get: An Evaluation of Color Differences Across Different Devices

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    The objective of this thesis was to examine color differences between different digital devices such as, phones, tablets, and monitors. New technology has always been the catalyst for growth and change within the printing industry. With gadgets like the iPhone and the iPad becoming increasingly more popular in the recent years, printers have yet another technological advancement to consider. Soft proofing strategies use color management technology that allows the client to view their proof on a monitor as a duplication of how the finished product will appear on a printed piece of paper. A possible problem can occur if clients are not using a calibrated monitor to view proofs.. Today\u27s generation is obsessed with new technology and more importantly convenience. As the printing industry continues to evolve it is critical to consider the devices that clients are using to view proofs and the possible color differences that exist between those devices. Within this thesis the following questions were the basis of the research: * Do color differences exist between the phones, tablets, and monitors? * If color differences are present, what is the Delta-E value compared to the standard? * Do specific colors produce higher Delta-E values? * Are certain brand devices more color accurate than others

    Optical Radiation Measurement

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    A case study in digitizing a photographic collection

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    This paper reviews the processes involved in the digitisation, display and storage of medium size collections of photographs using mid-range commercially available equipment. Guidelines for evaluating the performance of these digitisation processes based on aspects of image quality are provided. A collection of photographic slides, representing first-generation analogue reproductions of a photographic collection from the nineteenth century, is treated as a case study. Constraints on the final image quality and the implications of digital archiving are discussed. Full descriptions of device characterisation and calibration procedures are given and results from objective measurements carried out to assess the digitisation system are presented. The important issues of file format, physical storage and data migration are also addressed
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