Special Section on Image/Video Quality and System Performance

Evaluation of mobile phone camera benchmarking using objective camera speed and image quality metrics

[+] Author Affiliations
Veli-Tapani Peltoketo

University of Vaasa, Faculty of Technology, Wolffintie 34, Vaasa, 65200 Finland

Sofica Ltd., Kampusranta 9C, Seinajoki, 60320 Finland

J. Electron. Imaging. 23(6), 061102 (Jul 21, 2014). doi:10.1117/1.JEI.23.6.061102
History: Received March 24, 2014; Revised May 5, 2014; Accepted May 21, 2014
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Abstract.  When a mobile phone camera is tested and benchmarked, the significance of image quality metrics is widely acknowledged. There are also existing methods to evaluate the camera speed. However, the speed or rapidity metrics of the mobile phone’s camera system has not been used with the quality metrics even if the camera speed has become a more and more important camera performance feature. There are several tasks in this work. First, the most important image quality and speed-related metrics of a mobile phone’s camera system are collected from the standards and papers and, also, novel speed metrics are identified. Second, combinations of the quality and speed metrics are validated using mobile phones on the market. The measurements are done toward application programming interface of different operating systems. Finally, the results are evaluated and conclusions are made. The paper defines a solution to combine different image quality and speed metrics to a single benchmarking score. A proposal of the combined benchmarking metric is evaluated using measurements of 25 mobile phone cameras on the market. The paper is a continuation of a previous benchmarking work expanded with visual noise measurement and updates of the latest mobile phone versions.

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Citation

Veli-Tapani Peltoketo
"Evaluation of mobile phone camera benchmarking using objective camera speed and image quality metrics", J. Electron. Imaging. 23(6), 061102 (Jul 21, 2014). ; http://dx.doi.org/10.1117/1.JEI.23.6.061102


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