A platform for subjective image quality evaluation on mobile devices

From content creators, to content distributors and consumer electronics industry, image quality is an important consideration both from an engineering and artistic point of view. In recent years, with the shift towards mobile multimedia, it is becoming increasingly important to be able to assess the quality of images displayed on mobile devices. In this paper we present an iOS app that makes it easy to perform subjective image quality evaluation on mobile devices. The app implements two-alternative forced choice (2AFC) test methodology, and further reduces the cognitive load of subjects performing the test by providing an easy-to-use, natural interface using the mobile device's touch screen. A simple subjective experiment comparing two tone mapping operators for High Dynamic Range (HDR) images is performed to illustrate the effectiveness of the app.