Image Quality of a Smartphone Display with Super-Resolution

Abstract

The smartphone market has been growing rapidly and various smartphone content services are provided. However, the lack of bandwidth for the mobile network limits the smartphone video services to real-time. Most of the videos for smartphones on the internet are low-bitrate and blurring. In our previous works, we proposed a new SR technology that uses nonlinear signal processing (NLSP) and we demonstrated its theoretical capability and image quality for 4K TV sets. We applied NLSP to a smartphone. However, the capability of the NLSP on the smartphone display has not been tested. A subjective assessment using best-worst method was performed to verify the performance of NLSP on the smartphone display. The assessment was conducted by comparing the image qualities of the smartphones with and without NLSP and different manufacturers' smartphones. Assessment data were statistically analyzed, and the assessment results proved that the image quality of the smartphone with NLSP is most superior in resolution.