A study on the relationship between depth map quality and stereoscopic image quality using upsampled depth maps - Emerging Trends in Image Processing, Computer Vision, and Pattern Recognition - page 121

CHAPTER 10
A study on the relationship
between depth map quality
and stereoscopic image
quality using upsampled
depth maps
Saeed Mahmoudpour; Manbae Kim, [e-mail] Department of Computer and Communications Engineering, Kang-
won National University, Chunchon, Gangwon, Republic of Korea
Abstract
Recent advances in 3D technology have made the need for reliable quality evaluation of synthesized vir-
tual views. Using RGB image and the corresponding depth map, a synthesized view can be construc-
ted. Depth map upsampling has gained much interest following the release of time-of-flight cameras.
As upsampling can yield artifacts on sharp edges like ringing artifacts and jagged edges near the depth
map boundaries, it will degrade the final reconstructed stereoscopic image quality. In this article, several
upsampling methods are applied to depth maps. Then, diverse full-reference and no-reference quality
assessment tools are utilized to measure the quality of depth maps obtained from selected upsampling
approaches. Furthermore, subjective test is performed to determine the quality of stereoscopic images
reconstructed from upsampled depth maps. Finally, the relation between subjective assessment and each
objective quality assessment is investigated using correlation coefficients. The evaluation results intro-
duce the objective quality assessment tools that can correctly render human judgement.
Keywords
Correlation
Depth map
Stereoscopic image
Subjective assessment
Upsampling