Real-time 3-D HDTV depth cue conflict optimization

Abstract

This paper presents a solution for inserting graphics in a 3D HDTV environment in real-time. It focuses the effort on optimizing the process of insertion in order to override depth cue conflicts between occlusion and stereoscopical disparity caused by the insertion, thus, providing a method to control the 3D QoE after the insertion. The authors propose an algorithm based on disparity estimation modified to meet the needs of this particular task. Based on Census transform disparity estimation, the introduction of reduced disparity maps and mode filters offers the possibility to increase the disparity range and achieve subjective visual improvements while keeping the amount of physical resources needed. Visual discomfort avoidance versus objective stereoscopical analysis performance is a key point of the study, because it enables the possibility of overriding heavy algorithms keeping the quality of experience at a high level. It is intended to add On Screen Displays, device or channel logos, advertising or even subtitles to a 3D HDTV workflow on a general hardware device, meaning that it can even fit on private electronic devices, not only on professional equipment.