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Problems in differentiable rendering often involve optimizing scene parameters that cause motion in image space. The gradients for such parameters tend to be sparse, leading to poor convergence. While existing methods address this sparsity…

Graphics · Computer Science 2025-03-31 Ishit Mehta , Manmohan Chandraker , Ravi Ramamoorthi

Segmentation of organs or lesions from medical images plays an essential role in many clinical applications such as diagnosis and treatment planning. Though Convolutional Neural Networks (CNN) have achieved the state-of-the-art performance…

Computer Vision and Pattern Recognition · Computer Science 2021-05-27 Xiangde Luo , Guotai Wang , Tao Song , Jingyang Zhang , Michael Aertsen , Jan Deprest , Sebastien Ourselin , Tom Vercauteren , Shaoting Zhang

We present a spectrally accurate embedded boundary method for solving linear, inhomogeneous, elliptic partial differential equations (PDE) in general smooth geometries, focusing in this manuscript on the Poisson, modified Helmholtz, and…

Numerical Analysis · Mathematics 2022-09-28 David B. Stein

Edges of an image are considered a crucial type of information. These can be extracted by applying edge detectors with different methodology. Edge detection is a vital step in computer vision tasks, because it is an essential issue for…

Computer Vision and Pattern Recognition · Computer Science 2016-08-10 Osvaldo Pereira , Esley Torre , Yasel Garcés , Roberto Rodríguez

Depth estimation from a single image is an important task that can be applied to various fields in computer vision, and has grown rapidly with the development of convolutional neural networks. In this paper, we propose a novel structure and…

Computer Vision and Pattern Recognition · Computer Science 2022-11-01 Doyeon Kim , Woonghyun Ka , Pyungwhan Ahn , Donggyu Joo , Sehwan Chun , Junmo Kim

Getting precise aspects of road through segmentation from remote sensing imagery is useful for many real-world applications such as autonomous vehicles, urban development and planning, and achieving sustainable development goals. Roads are…

Computer Vision and Pattern Recognition · Computer Science 2023-09-28 Javed Iqbal , Aliza Masood , Waqas Sultani , Mohsen Ali

Interactive segmentation reduces the annotation time of medical images and allows annotators to iteratively refine labels with corrective interactions, such as clicks. While existing interactive models transform clicks into user guidance…

Computer Vision and Pattern Recognition · Computer Science 2023-11-27 Zdravko Marinov , Rainer Stiefelhagen , Jens Kleesiek

The performance of the state-of-the-art image segmentation methods heavily relies on the high-quality annotations, which are not easily affordable, particularly for medical data. To alleviate this limitation, in this study, we propose a…

Machine Learning · Statistics 2019-08-20 Aliasghar Mortazi , Naji Khosravan , Drew A. Torigian , Sila Kurugol , Ulas Bagci

In this paper, we propose a novel medical image segmentation using iterative deep learning framework. We have combined an iterative learning approach and an encoder-decoder network to improve segmentation results, which enables to precisely…

Computer Vision and Pattern Recognition · Computer Science 2017-08-14 Jung Uk Kim , Hak Gu Kim , Yong Man Ro

This paper presents a comprehensive evaluation framework for image segmentation algorithms, encompassing naive methods, machine learning approaches, and deep learning techniques. We begin by introducing the fundamental concepts and…

Computer Vision and Pattern Recognition · Computer Science 2025-04-08 Tatiana Merkulova , Bharani Jayakumar

Diffusion Probabilistic Methods are employed for state-of-the-art image generation. In this work, we present a method for extending such models for performing image segmentation. The method learns end-to-end, without relying on a…

Computer Vision and Pattern Recognition · Computer Science 2022-09-08 Tomer Amit , Tal Shaharbany , Eliya Nachmani , Lior Wolf

Let $F$ be a lower semicontinuous, 1-homogeneous positive function defined on $\mathbf{R}^n$. We provide a characterization of absolutely continuous paths that minimize the anisotropic $F$-length between two points. The characterization is…

Classical Analysis and ODEs · Mathematics 2025-09-10 Pietro Aldrigo

In this paper, we investigate a non-iterative imaging algorithm based on the topological derivative in order to retrieve the shape of penetrable electromagnetic inclusions when their dielectric permittivity and/or magnetic permeability…

Mathematical Physics · Physics 2013-05-14 Won-Kwang Park

Integrated Gradients (IG), a widely used axiomatic path-based attribution method, assigns importance scores to input features by integrating model gradients along a straight path from a baseline to the input. While effective in some cases,…

Machine Learning · Computer Science 2026-02-27 Sina Salek , Joseph Enguehard

Image segmentation is the problem of partitioning an image into different subsets, where each subset may have a different characterization in terms of color, intensity, texture, and/or other features. Segmentation is a fundamental component…

Computer Vision and Pattern Recognition · Computer Science 2015-11-03 M. Abdelsamea

Image segmentation is an important task in the domain of computer vision and medical imaging. In natural and medical images, intensity inhomogeneity, i.e. the varying image intensity, occurs often and it poses considerable challenges for…

Image and Video Processing · Electrical Eng. & Systems 2019-04-04 Raymond Chan , Hongfei Yang , Tieyong Zeng

The space mapping technique is used to efficiently solve complex optimization problems. It combines the accuracy of fine model simulations with the speed of coarse model optimizations to approximate the solution of the fine model…

Optimization and Control · Mathematics 2025-10-14 Sebastian Blauth

Due to low tissue contrast, irregular object appearance, and unpredictable location variation, segmenting the objects from different medical imaging modalities (e.g., CT, MR) is considered as an important yet challenging task. In this…

Computer Vision and Pattern Recognition · Computer Science 2018-05-10 Jinquan Sun , Yinghuan Shi , Yang Gao , Lei Wang , Luping Zhou , Wanqi Yang , Dinggang Shen

The increasing availability of digital 3D environments, whether through image-based 3D reconstruction, generation, or scans obtained by robots, is driving innovation across various applications. These come with a significant demand for 3D…

Computer Vision and Pattern Recognition · Computer Science 2025-04-16 Andrea Simonelli , Norman Müller , Peter Kontschieder

A novel locally statistical active contour model (ACM) for image segmentation in the presence of intensity inhomogeneity is presented in this paper. The inhomogeneous objects are modeled as Gaussian distributions of different means and…

Computer Vision and Pattern Recognition · Computer Science 2013-05-31 Kaihua Zhang , Lei Zhang , Kin-Man Lam , David Zhang
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