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Studying the effect of optimizing image quality in salient regions at the expense of background content

[+] Author Affiliations
Hani Alers

Delft University of TechnologyMan-Machine Interaction, Delft 2628 CD, The Netherlands

Judith Redi

Delft University of TechnologyMan-Machine Interaction, Delft 2628 CD, The Netherlands

Hantao Liu

University of Hull, Department of Computer, Hull HU6 7RX, United Kingdom

Ingrid Heynderickx

Delft University of TechnologyMan-Machine Interaction, Delft 2628 CD, The Netherlands

Philips Research Laboratories, Group Visual Experiences, Eindhoven 5656 AA, The Netherlands

J. Electron. Imaging. 22(4), 043012 (Nov 06, 2013). doi:10.1117/1.JEI.22.4.043012
History: Received April 18, 2013; Revised September 28, 2013; Accepted October 15, 2013
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Abstract.  Manufacturers of commercial display devices continuously try to improve the perceived image quality of their products. By applying postprocessing techniques on the incoming signal, they aim to enhance the quality level perceived by the viewer. These postprocessing techniques are usually applied globally over the whole image but may cause side effects, the visibility and annoyance of which differ with local content characteristics. To better understand and utilize this, a three-phase experiment was conducted where observers were asked to score images that had different levels of quality in their regions of interest and in the background areas. The results show that the region of interest has a greater effect on the overall quality of the image than the background. This effect increases with the increasing quality difference between the two regions. Based on the subjective data we propose a model to predict the overall quality of images with different quality levels in different regions. This model, which is constructed on empirical bases, can help craft weighted objective metrics that can better approximate subjective quality scores.

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© 2013 SPIE and IS&T

Topics

Eye ; Image quality

Citation

Hani Alers ; Judith Redi ; Hantao Liu and Ingrid Heynderickx
"Studying the effect of optimizing image quality in salient regions at the expense of background content", J. Electron. Imaging. 22(4), 043012 (Nov 06, 2013). ; http://dx.doi.org/10.1117/1.JEI.22.4.043012


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