Subjective Evaluation of Image Impression Enhancement due to WCG and HDR

We investigated the psychological effects of UHDTV viewing. UHDTV not only increased the spatio-temporal resolution but also expanded the color gamut and dynamic range. Although the introduction of a wide color gamut (WCG) and high dynamic range (HDR) made it possible to express more faithful images, it is unknown how it contributes to the viewer's benefit. We verified the image impression enhancement effect due to the introduction of HDR and WCG through a subjective evaluation test. The results indicated that the two factors work additively for impression enhancement and HDR appears to be the dominant factor.

I. Introduction

4 K/8K ultra-high-definition television (UHDTV) broadcasting has been launched on various media around the world, and it has ushered in the era of ultrahigh quality video. UHDTV not only increases the spatio-temporal resolution, i.e., the number of pixels, but also expands the color gamut and dynamic range compared to HDTV.