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- ArticleDecember 2024
HiFi-123: Towards High-Fidelity One Image to 3D Content Generation
AbstractRecent advances in diffusion models have enabled 3D generation from a single image. However, current methods often produce suboptimal results for novel views, with blurred textures and deviations from the reference image, limiting their practical ...
- ArticleOctober 2022
ASpanFormer: Detector-Free Image Matching with Adaptive Span Transformer
- Hongkai Chen,
- Zixin Luo,
- Lei Zhou,
- Yurun Tian,
- Mingmin Zhen,
- Tian Fang,
- David McKinnon,
- Yanghai Tsin,
- Long Quan
AbstractGenerating robust and reliable correspondences across images is a fundamental task for a diversity of applications. To capture context at both global and local granularity, we propose ASpanFormer, a Transformer-based detector-free matcher that is ...
- ArticleOctober 2022
NeILF: Neural Incident Light Field for Physically-based Material Estimation
AbstractWe present a differentiable rendering framework for material and lighting estimation from multi-view images and a reconstructed geometry. In the framework, we represent scene lightings as the Neural Incident Light Field (NeILF) and material ...
- research-articleApril 2022
Partial Solidification Ejection Criteria for Injection Molding Production to Reduce Cycle Time
Robotics and Computer-Integrated Manufacturing (RCIM), Volume 74, Issue Chttps://doi.org/10.1016/j.rcim.2021.102263Highlights- continued a recently reported work suggesting to achieve a dedicate optimum in-mold cooling time by taking care of both quality and productivity criteria ...
Productivity is essential in the injection molding process, especially for plastic parts featuring thick walls. However, for this process, product elastic and plastic deformations after in-mold cooling impose severe constraints on ...
- research-articleJuly 2021
A Dual-Power Coordinated Control for Swing System of Hydraulic-Electric Hybrid Excavator
2021 IEEE/ASME International Conference on Advanced Intelligent Mechatronics (AIM)Pages 55–60https://doi.org/10.1109/AIM46487.2021.9517471To meet the requirements of the high-precision operation of intelligent excavator, a dual power source coordinated control strategy of hydraulic-electric hybrid swing system is proposed. In the process of rotation, the servo motor is used as the main ...
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- ArticleAugust 2020
Learning Discriminative Feature with CRF for Unsupervised Video Object Segmentation
AbstractIn this paper, we introduce a novel network, called discriminative feature network (DFNet), to address the unsupervised video object segmentation task. To capture the inherent correlation among video frames, we learn discriminative features (D-...
- ArticleAugust 2020
Self-Supervised Monocular 3D Face Reconstruction by Occlusion-Aware Multi-view Geometry Consistency
AbstractRecent learning-based approaches, in which models are trained by single-view images have shown promising results for monocular 3D face reconstruction, but they suffer from the ill-posed face pose and depth ambiguity issue. In contrast to previous ...
- ArticleAugust 2020
Stochastic Bundle Adjustment for Efficient and Scalable 3D Reconstruction
AbstractCurrent bundle adjustment solvers such as the Levenberg-Marquardt (LM) algorithm are limited by the bottleneck in solving the Reduced Camera System (RCS) whose dimension is proportional to the camera number. When the problem is scaled up, this ...
- research-articleSeptember 2019
Haar wavelet method for approximating the solution of a coupled system of fractional-order integral–differential equations
Mathematics and Computers in Simulation (MCSC), Volume 163, Issue CPages 80–89https://doi.org/10.1016/j.matcom.2019.02.010AbstractIn the current study, a numerical scheme based on the Haar wavelet is proposed to solve a coupled system of fractional-order integral–differential equations. The proposed method is to derive the operational matrix of fractional-order ...
- research-articleMay 2019
Beyond Photometric Loss for Self-Supervised Ego-Motion Estimation
2019 International Conference on Robotics and Automation (ICRA)Pages 6359–6365https://doi.org/10.1109/ICRA.2019.8793479Accurate relative pose is one of the key components in visual odometry (VO) and simultaneous localization and mapping (SLAM). Recently, the self-supervised learning framework that jointly optimizes the relative pose and target image depth has attracted ...
- research-articleJanuary 2019
Learning fully dense neural networks for image semantic segmentation
AAAI'19/IAAI'19/EAAI'19: Proceedings of the Thirty-Third AAAI Conference on Artificial Intelligence and Thirty-First Innovative Applications of Artificial Intelligence Conference and Ninth AAAI Symposium on Educational Advances in Artificial IntelligenceArticle No.: 1139, Pages 9283–9290https://doi.org/10.1609/aaai.v33i01.33019283Semantic segmentation is pixel-wise classification which retains critical spatial information. The "feature map reuse" has been commonly adopted in CNN based approaches to take advantage of feature maps in the early layers for the later spatial ...
- ArticleSeptember 2018
Learning and Matching Multi-View Descriptors for Registration of Point Clouds
AbstractCritical to the registration of point clouds is the establishment of a set of accurate correspondences between points in 3D space. The correspondence problem is generally addressed by the design of discriminative 3D local descriptors on the one ...
- ArticleSeptember 2018
GeoDesc: Learning Local Descriptors by Integrating Geometry Constraints
AbstractLearned local descriptors based on Convolutional Neural Networks (CNNs) have achieved significant improvements on patch-based benchmarks, whereas not having demonstrated strong generalization ability on recent benchmarks of image-based 3D ...
- ArticleSeptember 2018
MVSNet: Depth Inference for Unstructured Multi-view Stereo
AbstractWe present an end-to-end deep learning architecture for depth map inference from multi-view images. In the network, we first extract deep visual image features, and then build the 3D cost volume upon the reference camera frustum via the ...
- research-articleAugust 2017
Fast Descriptors and Correspondence Propagation for Robust Global Point Cloud Registration
IEEE Transactions on Image Processing (TIP), Volume 26, Issue 8Pages 3614–3623https://doi.org/10.1109/TIP.2017.2700727In this paper, we present a robust global approach for point cloud registration from uniformly sampled points. Based on eigenvalues and normals computed from multiple scales, we design fast descriptors to extract local structures of these points. The ...
- research-articleMay 2017
A novel data clustering algorithm based on modified gravitational search algorithm
Engineering Applications of Artificial Intelligence (EAAI), Volume 61, Issue CPages 1–7https://doi.org/10.1016/j.engappai.2016.11.003Data clustering is a popular analysis tool for data statistics in many fields such as pattern recognition, data mining, machine learning, image analysis, and bioinformatics. The aim of data clustering is to represent large datasets by a fewer number of ...
- research-articleJune 2016
Image-Based Building Regularization Using Structural Linear Features
IEEE Transactions on Visualization and Computer Graphics (ITVC), Volume 22, Issue 6Pages 1760–1772https://doi.org/10.1109/TVCG.2015.2461163Reconstructed building models using stereo-based methods inevitably suffer from noise, leading to the lack of regularity which is characterized by straightness of structural linear features and smoothness of homogeneous regions. We leverage the ...
- research-articleJanuary 2016
Object localization using positive features
Neurocomputing (NEUROC), Volume 171, Issue CPages 463–470https://doi.org/10.1016/j.neucom.2015.06.061Naive Bayes Nearest Neighbor classifier, despite its simplicity, has recently gained remarkable success in image classification. Inspired from such results, we originally introduce to model the discriminativity of features using the density estimation ...
- ArticleDecember 2015
Dual-Feature Warping-Based Motion Model Estimation
ICCV '15: Proceedings of the 2015 IEEE International Conference on Computer Vision (ICCV)Pages 4283–4291https://doi.org/10.1109/ICCV.2015.487To break down the geometry assumptions of traditional motion models (e.g., homography, affine), warping-based motion model recently becomes very popular and is adopted in many latest applications (e.g., image stitching, video stabilization). With high ...
- ArticleDecember 2015
Higher-Order CRF Structural Segmentation of 3D Reconstructed Surfaces
ICCV '15: Proceedings of the 2015 IEEE International Conference on Computer Vision (ICCV)Pages 2093–2101https://doi.org/10.1109/ICCV.2015.242In this paper, we propose a structural segmentation algorithm to partition multi-view stereo reconstructed surfaces of large-scale urban environments into structural segments. Each segment corresponds to a structural component describable by a surface ...