Perceived Image Contrast and Observer Preference I. The Effects of Lightness, Chroma, and Sharpness Manipulations on Contrast Perception

Calabria, Anthony; Fairchild, Mark D.

doi:10.2352/j.imagingsci.technol.2003.47.6.art00006

Cited by 22 publications

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Color preference of aged observers compared to young observers

Beke

Kutas

Kwak

et al. 2008

Color Research & Application

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In modern society, elderly people tend to become enthusiastic users of displays. These displays are optimized for the visual properties of young adults ignoring the specific attributes of the vision of the elderly though the existence of differences is evident. It is true, however, that most of the investigations follow a bottomup paradigm (changes of optical density, neural changes, etc.), and their results are too ambiguous to be taken into account directly in display optimization for the elderly, partly because there is a long-term adaptation, which apparently recompensates for some of the changes in the human visual system. Preference is a high-level psychological factor having a very important impact on the acceptability of color displays. The present article follows a top-down methodology to investigate these age-related differences directly. The first part concentrates on functionalities of the human visual system: white point preference, chroma perception, unique, and preferred hues. Results confirm the long-term compensation theory for the elderly observers along with the chromatic content decrease of perceived colors. The second part investigates preference differences in case of photorealistic images in terms of global and local contrast, white point, average chroma, and the effect of several image color manipulation techniques. Results indicate significant differences between young and aged observers' color image preference, some of which can be explained with neuro-physiological changes, others may be attributed to cultural implications.

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Color preference of aged observers compared to young observers

Beke

Kutas

Kwak

et al. 2008

Color Research & Application

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Eye Movements on Assessing Perceptual Image Quality

Tsai

Guan

Tsai

2016

Human Aspects of IT for the Aged Population. Design for Aging

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Evaluation of HDR tone mapping methods using essential perceptual attributes

adík

Wimmer

Neumann

et al. 2008

Computers & Graphics

164

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The problem of reproducing high dynamic range images on devices with restricted dynamic range has gained a lot of interest in the computer graphics community. There exist various approaches to this issue, which span several research areas including computer graphics, image processing, color vision, physiological aspects, etc. These approaches assume a thorough knowledge of both the objective and subjective attributes of an image. However, no comprehensive overview and analysis of such attributes has been published so far.In this contribution, we present an overview about the effects of basic image attributes in HDR tone mapping. Furthermore, we propose a scheme of relationships between these attributes, leading to the definition of an overall image quality measure. We present results of subjective psychophysical experiments that we have performed to prove the proposed relationship scheme. Moreover, we also present an evaluation of existing tone mapping methods (operators) with regard to these attributes. Finally, the execution of with-reference and without a real reference perceptual experiments gave us the opportunity to relate the obtained subjective results.Our effort is not just useful to get into the tone mapping field or when implementing a tone mapping method, but it also sets the stage for well-founded quality comparisons between tone mapping methods. By providing good definitions of the different attributes, user-driven or fully automatic comparisons are made possible.

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Perceived Image Contrast and Observer Preference I. The Effects of Lightness, Chroma, and Sharpness Manipulations on Contrast Perception

Cited by 22 publications

References 0 publications

Color preference of aged observers compared to young observers

Color preference of aged observers compared to young observers

Eye Movements on Assessing Perceptual Image Quality

Evaluation of HDR tone mapping methods using essential perceptual attributes

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