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An autostereoscopic display using multiple miniature projectors array was developed to realize a 3D display system with both high resolution and large number of views. It is found that image distortion of the projection lens, alignment between the projector and the screen, and image blending among tiled images are the three critical technologies in such a system. This paper presents the researches...
This paper proposes a novel method that uses temporal reference pictures to improve the quality of view synthesis prediction. Existing view synthesis prediction schemes generate image signals from just only inter-view reference pictures. However, there are many types of signal mismatch like illumination, color, and focus mismatch across views, and these mismatches decrease the prediction performance...
The Emergence of three dimensional (3D) video applications, based on Depth Image Based Rendering (DIBR) has brought about new dimensions to the video transmission problem, due to the need to transmit additional depth information to the receiver. Until the transmission problem of 3D video is adequately addressed, consumer applications based on 3D video will not gain much popularity. Exploiting the...
We reconstruct a spatially distributed three-dimensional (3D) wave field from a number of intensity observations, obtained in different sensor planes, parallel to the object plane. The proposed algorithm can be treated as a multiple plane iterative Gerchberg-Saxton algorithm [1]. It is obtained from the best linear estimate of the complex-valued object distribution derived for the complex-valued observations...
This paper proposes an iterative search strategy for joint motion and disparity estimation in order to eliminate the temporal and inter-view redundancies of multiview video. This iterative search strategy can work with an adaptive search range adjustment through a confidence measure of a loop constraint to obtain both motion and disparity vectors simultaneously with low complexity. Experimental results...
Stereo-correspondence algorithms often produce noisy and inaccurate depth estimates. We present a mechanism for improving depth maps by means of adaptive cross-trilateral median filtering (ACTMF). To preserve details in the depth map and simultaneously smooth depths in homogeneous areas the filter parameters are adapted to the local image structure. The influence of initial miss-matches is minimized...
This paper presents results on mixed resolution stereo video coding including inter view prediction. The objective tests show that coding one view of a stereo pair at a lower resolution outperforms coding of a low pass filtered view at base resolution. For both coding methods inter view prediction produces additional coding gains. Two different prediction approaches have been compared: One uses the...
In this paper, we propose an efficient scheme to automatically convert existing 2D videos to 3D ones. The proposed method extracts motion information from two consecutive frames to estimate depth map for each of them. In the method, we first develop a region-based Graph cut method to fast and accurately perform motion segmentation, which is robust to large interframe motions. Then, a depth assigning...
We propose a content-preserving stereo image editing technique by using stereo extension of seam carving. Seam carving is the process of deleting or duplicating connected paths, or seams, that consist of less important pixels in order to resize the image while preserving the image content as much as possible. The problem targeted in this paper is how to apply the seam carving method to a pair of stereo...
This paper proposes an efficient method for tracking a 3D surface model, which utilises an accurate neighbourhood motion prior to regularize the solution. Typical 3D motion trackers only estimate the local translations at each point on the surface model, which means that enforcing smooth motion between neighbouring surface points can be difficult when undergoing rigid body motion. This paper uses...
In this paper, we describe a system for smart surveillance using stereo images with applications to advanced video surveillance systems. The system utilizes two smart IP cameras to obtain the position and location of objects. In this case, the object target is human face. The position and location of the object are automatically extracted from two IP cameras and subsequently transmitted to an ACTi...
Despite the burgeoning advances in 3D video technologies, 3D video adaptation is still in its infancy. 3D video has a multidimensional nature. To support the growth of 3D adaptation technologies, key factors that characterise this nature should be thoroughly studied. Spatial resolution is one of the important factors characterising this nature. Thus, particularly the effect of different spatial resolutions...
In this paper, we present a new caption insertion method for three-dimensional (3D) broadcasting service. Caption insertion technique for broadcasting service is very important because the caption emphasizes significant information during a broadcasting program and can help the hearing impairment people. In recent years, some caption insertion method has been proposed for 3D broadcasting called next...
Due to the technological advancement of 3D video technologies and the availability of other supportive services such as high bandwidth communication links, introduction of immersive video services to the mass market is imminent. However, in order to provide better service to demanding customers, the transmission system parameters need to be changed “on the fly”. Measured 3D video quality at the receiver...
We present an optical setup which makes use of a Spatial Light Modulator (SLM) in order to electronically control the modification of the reference wave in Digital Lensless Fourier Holography. The SLM provides the advantage of avoiding any mechanical adjustments in order to adapt the reference wave to different object positions. A rule for the complex transmittance required to be generated by the...
Holographic display system that uses six phase-only spatial light modulators (SLMs) performs holographic reconstructions from the phase-hologram of a point cloud that is extracted from 3D object. The SLMs are tiled as a three by two matrix on a virtual planar surface. The alignment is successful and the display system generates large holographic reconstructions. The proposed system can be used either...
In this paper we address the disocclusion problem that occurs in Depth Image Based Rendering (DIBR). With a computed background model, the areas which were occluded by foreground objects can be filled with their true color values, in contrast to approximate values as in previous approaches. Our method avoids artifacts that occur with common approaches and can additionally reduce compression artifacts...
Multi-view video streaming over P2P network has emerged as a scalable solution for providing multi-view video service on Internet, as it utilizes users' bandwidth resource to reduce streaming server's bandwidth cost when delivering the dataintensive multi-view video. However, the view switching behavior in multi-view video introduces excessive dynamic to the system, which brings two performance issues...
In mixed-resolution (MR) stereoscopic video, one of the views has a lower resolution compared to the other one, hence providing means for improved compression. The underlying assumption in MR stereoscopic video is that the human visual system fuses the left and right views in such a way that the perceived image quality is close to that of the higher-resolution view. This paper describes a subjective...
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