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This paper proposes a novel fractional compensation approach for spatial scalable video coding. It simultaneously exploits inter layer correlation and intra layer correlation by learning-based mapping. Instead of using an enhancement layer reconstruction as an entire reference, a set of reference pairs are generated from high-frequency components of both base layer and enhancement layer reconstructions...
A kurtosis-based super-resolution image reconstruction algorithm is proposed in this paper. Firstly, we give the definition of the kurtosis image and analyze its two properties: (i) the kurtosis image is Gaussian noise invariant, and (ii) the absolute value of a kurtosis image becomes smaller as the the image gets smoother. Then we build a constrained absolute local kurtosis maximization function...
This paper presents a new directional image interpolator, aiming to increase image resolution with high perceptual quality and low computational complexity. In our method, missing pixels in a magnified image are generated through linear interpolation on certain fixed supports to facilitate fast implementation, while local directional features are imposed on the adaptive interpolation weights which...
Human eyes have different sensitivity to different frequency components of image signals, typically, low frequency components are relatively more crucial to the perceptual quality of images than high frequency components. Based on this observation, we propose a novel sampling scheme for compressive sensing framework by designing a weighting scheme for the sampling matrix. By adjusting the weighting...
In this paper, we introduce a novel way to represent an image sequence, which naturally exhibits the temporal persistence of the textures. Standardized representations have been thoroughly optimized, and getting significant improvements has become more and more difficult. As an alternative, Analysis-Synthesis (AS) coders have focused on the use of texture within a video coder. We introduce here a...
This paper proposes two entropy constrained color splitting algorithms through building a binary tree structure for a progressive transmission of palette images. At each step of color splitting, a representative color is split into two new representative colors to minimize the distortion incurred by the reconstructed image subject to an entropy constraint. Among the bit rates of interest, both of...
Long has it become a hot topic that reconstructing images of better visual quality from one or a serial of degraded ones. Although there are thousands of different restoration methods, in this paper, we focus on removing the ringing artifact caused by lossy video compression. Being a sort of restoration method, we choose the max-a-posterior (MAP) method to model this optimization problem. Quantification...
In this paper, we propose a novel face hallucination method to reconstruct a high-resolution face image from a lowresolution observation based on a set of high- and lowresolution local training image pairs. Instead of basing on probabilistic or manifold learning models, the proposed method synthesizes the high-resolution image patch using the same position image patches of training image pairs. A...
Target tracking based restrictively on acoustic and electromagnetic (EM) sensors may not provide adequate information regarding the mobile target. Hence, imaging sensors can be used to provide visual information. This paper develops an image-based tracking approach based on epipolar geometry and Kalman filtering. A corner detection technique is used to identify the prominent features in the frame...
In this paper a novel method for view independent human movement representation and recognition, exploiting the rich information contained in multi-view videos, is proposed. The binary masks of a multi-view posture image are first vectorized, concatenated and the view correspondence problem between train and test samples is solved using the circular shift invariance property of the discrete Fourier...
Most approaches to vehicle tracking have adopted a single calibrated camera for the task, which leads to an under-conditioned problem. We present a surveillance system for on-line vehicle tracking based on two cameras and structure from motion (SfM). Our surveillance system starts by tracking feature points. A novel matching scheme is proposed that allows a subset of feature points to be corresponded...
Though rate control is not normalized in any video coding standards, it plays an important role in video coding/communication area. Rate control algorithms aim to achieve perceivable video quality in video communication applications under some real-world constraints, such as bandwidth, delay, buffer sizes, etc. This paper presents a novel rate control mechanism for low delay video communication of...
This paper proposes a cooperative example-based face hallucination method using multiple references. The proposed method first uses clustering and residual prototype faces construction to improve the performance of hallucinating a single low-resolution (LR) face to obtain a high-resolution (HR) counterpart. In the case that multiple LR face images for a person are available, a unique feature of the...
This paper addresses the problem of complete and detailed 3D model reconstruction of objects filmed by multiple cameras under varying illumination. Firstly, initial normal maps are obtained to enhance the correspondence mapping. Then, the depth for every pixel is estimated by combining photometric constraint with occlusion robust photo-consistency. Finally, after filtering the point cloud, a Poisson...
We present a 3D object relighting technique for multiview-multi-lighting (MVML) image sets. Our relighting technique is a fusion of multi-view stereo (MVS) technique and image based relighting (IBL) technique. The MVML dataset consists of multiple camera view with each view filmed under multiple time-multiplex illumination modes. A multi-view 3D reconstruction algorithm is first applied using traditional...
The next-generation social communication medium, tele-immersion, is receiving increasing attention from both the research and industrial communities. It enables interaction between geographically distributed sites through realistic reconstruction of physical scenes in immersive spaces. While the previous research focused on real-world measurements of implemented tele-immersive systems, we take a model-based...
A method to extract views of different orientations of a vehicle captured using multi cameras on roadside is proposed. We expect the use of multi views would increase classification performance in tasks such as identifying vehicle types/makes. This paper does not discuss classification work in details; it accepts the concept that with more data obtained through multi camera views, the use of distinctive...
For the three-dimensional surface texture can display the texture information of the object better than the two-dimensional illumination and the view angles; it is widely used in virtual reality and computer games. Photometric Stereo, as one of the effective technologies for capture of three-dimensional surface texture information, has attracted wide attention. Uniform illumination is the essential...
Multimedia applications have played an increasingly important role in entertainment, security, remote sensing, monitoring and other civil and military applications. The traditional approach to multimedia acquisition, communication and consumption chain starts with high resolution content acquisition, followed by content processing, image and video compression and then delivery over wireless and wired...
The research effort at Microsoft research on multimodal collaboration and human-computer interaction aims at developing tools that allow people across geographically distributed sites to interact collaboratively with immersive experience. Our prototype systems consist of cameras, displays, speakers, microphones, computer controllable lights, and/or input devices such as touch sensitive surface, stylus,...
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