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In this paper, an in-loop sample edge offset compensation (SEOC) framework is proposed for High Efficiency Video Coding (HEVC) based 3D video (3D-HEVC) coding. The framework targets at improving the reconstruction quality of the depth images, especially in edge areas. In a typical 3DV system, depth images are used for synthesizing the virtual views, therefore preserving high quality depth images,...
Spatiotemporal-encoding single-scan MRI method is relatively insensitive to field inhomogeneity compared to EPI method. Conjugate gradient (CG) method has been used to reconstruct super-resolved images from the original blurred ones based on coarse magnitude-calculation. In this article, a new de-convolution reconstruction method is proposed. Through removing the quadratic phase modulation from the...
Digital breast tomosynthesis is a novel breast cancer detection technique by allowing the reconstruction of arbitrary planes in the breast from a set of limited-angle projection images acquired at different view angles with a particular tube geometry setup. In this paper, filtered backprojection (FBP) was optimized as the reconstruction method with a parallel imaging breast tomosynthesis system. The...
In this paper, we present a novel statistical reconstruction method based on Compton noise suppression for Digital Breast Tomosynthesis. The physical modeling for X-ray's interaction with tissues was investigated. A Compton noise based statistical model with a conjugate prior was introduced. Results from our proposed method, Backprojection (BP) method, Simultaneous Algebraic Reconstruction Technique...
Matching images with large geometric and iconic changes (e.g. faces under different poses and facial expressions) is an open research problem in computer vision. There are two fundamental approaches to solve the correspondence problem in images: Feature-based matching and model-based matching. Feature-based matching relies on the assumption that features are stable across view-points and iconic changes,...
In the multiview video plus depth (MVD) representation for 3D video, a depth map sequence is coded for each view. In the decoding end, a view synthesis algorithm is used to generate virtual views from depth map sequences. Many of the known view synthesis algorithms introduce rendering artifacts especially at object boundaries. In this paper, a depth-level-adaptive view synthesis algorithm is presented...
In this study, a new video super-resolution (SR) reconstruction approach using a mobile search strategy and adaptive patch size is proposed. Based on the nonlocal-means (NLM) SR algorithm, the mobile strategy for search center and adaptive patch size are proposed to reduce the computational complexity and improve the visual quality, respectively. Based on the experimental results obtained in this...
In order to have an intuitive grasp of atrial fibrillation model using ECG mapping technique, we started from animals' CT images, extracted contours of torso surface and epicardium with Snake model, reconstructed three-dimensional models of torso surface and epicardium with triangular patches. Using interpolation based on Delaunay triangulation, signals (acquired from animal experiments) of normal...
A novel images fusion method based on bidimensional empirical mode decomposition (BEMD) is proposed, aiming at solving the fusion problem of multi-focus images. BEMD is a new form of fully two-dimensional multi-scale decomposition and has superior quality in extracting salient features in multi-focus images. This paper uses BEMD to decompose the source images into their components adaptively without...
Feedback-based error-resilient video coding relies on efficient transmission of feedback messages. The Audio-Visual Profile with Feedback (AVPF) for Real-time Transport Control Protocol (RTCP), i.e. RTP/AVPF, supports low-latency feedbacks. In this paper, a reference picture selection (RPS) method using RTP/AVPF-compliant feedback is proposed. A restriction period is first derived in the codec layer...
Scene reconstruction based on polyhedral solids is an important problem in computer vision. Generally speaking, an efficient representation is to use a line drawing which is regarded as a projection of the 3D object. In this paper, we consider a single line drawing whose face topology is already known and all the vertices are given in the 2D projection. To recover the possible 3D polyhedra which project...
A new method of vector interpolation in three-dimensional reconstruction of tissue Doppler echocardiography is developed and applied to the clinical research. Both the amplitude and direction information of functional parameters, such as velocity or acceleration, in tissue Doppler images is utilized to reconstruct dynamic three-dimensional vector field of myocardial tissue motion. The reconstructed...
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