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This paper presents the Harmonic Beltrami Signature Network (HBSN), a novel deep learning architecture for computing the Harmonic Beltrami Signature (HBS) from binary-like images. HBS is a shape representation that provides a one-to-one…

计算机视觉与模式识别 · 计算机科学 2026-03-04 Chenran Lin , Lok Ming Lui

There is a growing interest in shape analysis in recent years. We present a novel shape signature for 2D bounded simply-connected domains, named the Harmonic Beltrami signature (HBS). The proposed signature is based on the harmonic…

计算机视觉与模式识别 · 计算机科学 2021-10-26 Chenran Lin , Lok Ming Lui

Many genus-0 surface mapping tasks such as landmark alignment, feature matching, and image-driven registration, can be reduced (via an initial spherical conformal map) to optimizing a spherical self-homeomorphism with controlled distortion.…

图形学 · 计算机科学 2026-02-05 Zhehao Xu , Lok Ming Lui

In this work, we propose to resolve the issue existing in current deep learning based organ segmentation systems that they often produce results that do not capture the overall shape of the target organ and often lack smoothness. Since…

计算机视觉与模式识别 · 计算机科学 2019-12-10 Yuan Xue , Hui Tang , Zhi Qiao , Guanzhong Gong , Yong Yin , Zhen Qian , Chao Huang , Wei Fan , Xiaolei Huang

Automatic segmentation of anatomical landmarks from ultrasound (US) plays an important role in the management of preterm neonates with a very low birth weight due to the increased risk of developing intraventricular hemorrhage (IVH) or…

图像与视频处理 · 电气工程与系统科学 2019-12-19 Jeya Maria Jose V. , Rajeev Yasarla , Puyang Wang , Ilker Hacihaliloglu , Vishal M. Patel

Masked image modeling (MIM) with transformer backbones has recently been exploited as a powerful self-supervised pre-training technique. The existing MIM methods adopt the strategy to mask random patches of the image and reconstruct the…

计算机视觉与模式识别 · 计算机科学 2024-02-05 Zhaohu Xing , Lei Zhu , Lequan Yu , Zhiheng Xing , Liang Wan

In shape analysis, finding an optimal 1-1 correspondence between surfaces within a large class of admissible bijective mappings is of great importance. Such process is called surface registration. The difficulty lies in the fact that the…

最优化与控制 · 数学 2010-05-19 L. M. Lui , T. W. Wong , W. Zeng , X. F. Gu , P. M. Thompson , T. F. Chan , S. T. Yau

Automatic mammogram classification and mass segmentation play a critical role in a computer-aided mammogram screening system. In this work, we present a unified mammogram analysis framework for both whole-mammogram classification and…

计算机视觉与模式识别 · 计算机科学 2018-09-03 Rongzhao Zhang , Han Zhang , Albert C. S. Chung

Recent advancements in medical image segmentation techniques have achieved compelling results. However, most of the widely used approaches do not take into account any prior knowledge about the shape of the biomedical structures being…

图像与视频处理 · 电气工程与系统科学 2019-09-18 Zhou He , Siqi Bao , Albert Chung

Semi-supervised learning has attracted much attention in medical image segmentation due to challenges in acquiring pixel-wise image annotations, which is a crucial step for building high-performance deep learning methods. Most existing…

计算机视觉与模式识别 · 计算机科学 2020-10-22 Shuailin Li , Chuyu Zhang , Xuming He

Registration, which aims to find an optimal one-to-one correspondence between different data, is an important problem in various fields. This problem is especially challenging when large deformations occur. In this paper, we present a novel…

微分几何 · 数学 2013-10-08 Lam Ka Chun , Lok Ming Lui

This paper investigates an extremely challenging problem: barely-supervised volumetric medical image segmentation (BSS). A BSS training dataset consists of two parts: 1) a barely-annotated labeled set, where each labeled image contains only…

计算机视觉与模式识别 · 计算机科学 2024-09-05 Zhiqiang Shen , Peng Cao , Junming Su , Jinzhu Yang , Osmar R. Zaiane

Medical image segmentation has become an essential technique in clinical and research-oriented applications. Because manual segmentation methods are tedious, and fully automatic segmentation lacks the flexibility of human intervention or…

图像与视频处理 · 电气工程与系统科学 2019-04-24 Kevin Karsch , Qing He , Ye Duan

Deep learning-based brain tumor segmentation (BTS) models for multi-modal MRI images have seen significant advancements in recent years. However, a common problem in practice is the unavailability of some modalities due to varying scanning…

计算机视觉与模式识别 · 计算机科学 2024-06-17 Weide Liu , Jingwen Hou , Xiaoyang Zhong , Huijing Zhan , Jun Cheng , Yuming Fang , Guanghui Yue

We introduce a method for training neural networks to perform image or volume segmentation in which prior knowledge about the topology of the segmented object can be explicitly provided and then incorporated into the training process. By…

计算机视觉与模式识别 · 计算机科学 2020-09-21 James R. Clough , Nicholas Byrne , Ilkay Oksuz , Veronika A. Zimmer , Julia A. Schnabel , Andrew P. King

Image segmentation has been a very active research topic in image analysis area. Currently, most of the image segmentation algorithms are designed based on the idea that images are partitioned into a set of regions preserving homogeneous…

计算机视觉与模式识别 · 计算机科学 2015-03-17 Yu Su , Margaret H. Dunham

In this paper, we present a decision level fused local Morphological Pattern Spectrum(PS) and Local Binary Pattern (LBP) approach for an efficient shape representation and classification. This method makes use of Earth Movers Distance(EMD)…

计算机视觉与模式识别 · 计算机科学 2015-04-28 B. H. Shekar , Bharathi Pilar

We propose the Topology-Preserving Segmentation Network, a deformation-based model that can extract objects in an image while maintaining their topological properties. This network generates segmentation masks that have the same topology as…

计算机视觉与模式识别 · 计算机科学 2024-06-18 Han Zhang , Lok Ming Lui

Sub-cortical brain structure segmentation in Magnetic Resonance Images (MRI) has attracted the interest of the research community for a long time because morphological changes in these structures are related to different neurodegenerative…

计算机视觉与模式识别 · 计算机科学 2018-11-15 Kaisar Kushibar , Sergi Valverde , Sandra Gonzalez-Villa , Jose Bernal , Mariano Cabezas , Arnau Oliver , Xavier Llado

Convex Shapes (CS) are common priors for optic disc and cup segmentation in eye fundus images. It is important to design proper techniques to represent convex shapes. So far, it is still a problem to guarantee that the output objects from a…

计算机视觉与模式识别 · 计算机科学 2020-05-18 Jun Liu , Xue-Cheng Tai , Shousheng Luo
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