Seo Young Choi

Optimal projector configuration design for 300-Mpixel multi-projection 3D display

To achieve an immersive natural 3D experience on a large screen, a 300-Mpixel multi-projection 3D display that has a 100-inch screen and a 40° viewing angle has been developed. To increase the number of rays emanating from each pixel to 300 in the horizontal direction, three hundred projectors were used. The projector configuration is an important issue in generating a high-quality 3D image, the luminance characteristics were analyzed and the design was optimized to minimize the variation in the brightness of projected images. The rows of the projector arrays were repeatedly changed according to a predetermined row interval and the projectors were arranged in an equi-angular pitch toward the constant central point. As a result, we acquired very smooth motion parallax images without discontinuity. There is no limit of viewing distance, so natural 3D images can be viewed from 2 m to over 20 m.

Ultra-High-Definition Television (Rec. ITU-R BT.2020): A Generational Leap in the Evolution of Television [Standards in a Nutshell]

The International Telecommunication Union Radiocommunication Sector (ITU-R) published Recommendation (Rec.) BT.2020? Parameter Values for Ultra-High-Definition Television Systems for Production and International Programme Exchange? [1] in August 2012. The parameters for television (TV) systems are roughly equivalent to the image format, including pixel count, frame frequency, and colorimetry. These basic system parameters determine what kind of visual experiences the system can provide to the viewers in terms of possible field of view (FOV) size, quality of motion portrayal, and accuracy of color reproduction.

3D image quality index using SDP-based binocular perception model

A novel quality index for stereoscopic image pairs is proposed in this work. First, we introduce a parameter called the structural distortion parameter (SDP), which varies according to different distortion types. Then, we use the SDP as a control parameter in a binocular perception model, and apply it into three components of SSIM to obtain an overall quality index. In the proposed framework, the binocular model accommodates distortion types and distortion degrees and, therefore, offers robust quality assessment results for both symmetric and asymmetric distortions. It is shown by experimental results that the proposed index outperforms several existing 3D image quality index methods.

A New Wide-Gamut RGB Primary Set and Efficient Color Encoding Methods for Ultrahigh-Definition Television (UHDTV)

This paper introduces a new wide-gamut RGB primary set and a new color-encoding method that are developed for ultrahigh-definition television (UHDTV). The extended gamut RGB-primary set compared with the conventional CRT-centric gamut is proposed in favor of inclusion of real-world surface colors and in consideration of the current and prospective colorimetric characteristics of flat panel displays using which UHDTV programs will likely be reproduced. The new color encoding method is derived to enable luminance and chrominance information to be accurately separated, resulting in orthogonal video signals. The new luma and color-difference signals generated by the newly derived encoding scheme are demonstrated to have insignificant crosstalk. It is also shown that this fact can contribute to improving image quality after subsampling color-difference components and to increasing compression efficiency.