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Data imbalance is a major problem that affects several machine learning (ML) algorithms. Such a problem is troublesome because most of the ML algorithms attempt to optimize a loss function that does not take into account the data imbalance.…

Image and Video Processing · Electrical Eng. & Systems 2020-05-19 Steve Tsham Mpinda Ataky , Jonathan de Matos , Alceu de S. Britto , Luiz E. S. Oliveira , Alessandro L. Koerich

Image-to-image translation is an ill-posed problem as unique one-to-one mapping may not exist between the source and target images. Learning-based methods proposed in this context often evaluate the performance on test data that is similar…

Image and Video Processing · Electrical Eng. & Systems 2021-10-08 Uddeshya Upadhyay , Viswanath P. Sudarshan , Suyash P. Awate

The CycleGAN framework allows for unsupervised image-to-image translation of unpaired data. In a scenario of surgical training on a physical surgical simulator, this method can be used to transform endoscopic images of phantoms into images…

Computer Vision and Pattern Recognition · Computer Science 2021-09-01 Lalith Sharan , Gabriele Romano , Sven Koehler , Halvar Kelm , Matthias Karck , Raffaele De Simone , Sandy Engelhardt

Traditional image similarity metrics are ineffective at evaluating the similarity between a real image of a scene and an artificially generated version of that viewpoint [6, 9, 13, 14]. Our research evaluates the effectiveness of a new,…

Computer Vision and Pattern Recognition · Computer Science 2025-06-17 Charith Wickrema , Sara Leary , Shivangi Sarkar , Mark Giglio , Eric Bianchi , Eliza Mace , Michael Twardowski

One of the major challenges in Minimally Invasive Surgery (MIS) such as laparoscopy is the lack of depth perception. In recent years, laparoscopic scene tracking and surface reconstruction has been a focus of investigation to provide rich…

Computer Vision and Pattern Recognition · Computer Science 2017-03-06 Long Chen , Wen Tang , Nigel W. John , Tao Ruan Wan , Jian Jun Zhang

Photo enhancement plays a crucial role in augmenting the visual aesthetics of a photograph. In recent years, photo enhancement methods have either focused on enhancement performance, producing powerful models that cannot be deployed on edge…

Computer Vision and Pattern Recognition · Computer Science 2025-11-11 Feng Zhang , Haoyou Deng , Zhiqiang Li , Lida Li , Bin Xu , Qingbo Lu , Zisheng Cao , Minchen Wei , Changxin Gao , Nong Sang , Xiang Bai

Purpose: We aim to enhance the image quality of point-of-care ultrasound (POCUS) devices using deep learning and a novel paired dataset of POCUS and high-end ultrasound images. Approach: We collected the first accurately paired dataset…

Image and Video Processing · Electrical Eng. & Systems 2026-05-12 Lennard M. van Karnenbeek , Hilde G. A. van der Pol , Mark Wijkhuizen , Eva Poelman , Caroline A. Drukker , Theo Ruers , Freija Geldof , Behdad Dashtbozorg

In Masked Image Modeling (MIM), two primary methods exist: Pixel MIM and Latent MIM, each utilizing different reconstruction targets, raw pixels and latent representations, respectively. Pixel MIM tends to capture low-level visual details…

Computer Vision and Pattern Recognition · Computer Science 2025-01-07 Junmyeong Lee , Eui Jun Hwang , Sukmin Cho , Jong C. Park

Structures matter in single image super resolution (SISR). Recent studies benefiting from generative adversarial network (GAN) have promoted the development of SISR by recovering photo-realistic images. However, there are always undesired…

Image and Video Processing · Electrical Eng. & Systems 2020-03-31 Cheng Ma , Yongming Rao , Yean Cheng , Ce Chen , Jiwen Lu , Jie Zhou

In recent years, generative adversarial networks (GANs) have gained tremendous popularity for potential applications in medical imaging, such as medical image synthesis, restoration, reconstruction, translation, as well as objective image…

Image and Video Processing · Electrical Eng. & Systems 2022-04-28 Varun A. Kelkar , Dimitrios S. Gotsis , Frank J. Brooks , Prabhat KC , Kyle J. Myers , Rongping Zeng , Mark A. Anastasio

Fusing a low-resolution hyperspectral image (HSI) and a high-resolution multispectral image (MSI) of the same scene leads to a super-resolution image (SRI), which is information rich spatially and spectrally. In this paper, we super-resolve…

Computer Vision and Pattern Recognition · Computer Science 2019-02-25 Chandrajit Bajaj , Tianming Wang

This paper addresses the single-image compressive sensing (CS) and reconstruction problem. We propose a scalable Laplacian pyramid reconstructive adversarial network (LAPRAN) that enables high-fidelity, flexible and fast CS images…

Computer Vision and Pattern Recognition · Computer Science 2018-11-06 Kai Xu , Zhikang Zhang , Fengbo Ren

The importance of Image quality assessment (IQA) is ever increasing due to the fast paced advances in imaging technology and computer vision. Among the numerous IQA methods, Structural SIMilarity (SSIM) index and its variants are better…

Image and Video Processing · Electrical Eng. & Systems 2022-12-06 X. Li , W. Armour

Medical imaging is an essential tool for diagnosing and treating diseases. However, lacking medical images can lead to inaccurate diagnoses and ineffective treatments. Generative models offer a promising solution for addressing medical…

Image and Video Processing · Electrical Eng. & Systems 2024-01-02 M. AbdulRazek , G. Khoriba , M. Belal

Despite their success, Segment Anything Models (SAMs) experience significant performance drops on severely degraded, low-quality images, limiting their effectiveness in real-world scenarios. To address this, we propose GleSAM, which…

Computer Vision and Pattern Recognition · Computer Science 2026-04-27 Guangqian Guo , Yong Guo , Xuehui Yu , Wenbo Li , Yaoxing Wang , Shan Gao

Medical image synthesis is a challenging task due to the scarcity of paired data. Several methods have applied CycleGAN to leverage unpaired data, but they often generate inaccurate mappings that shift the anatomy. This problem is further…

Image and Video Processing · Electrical Eng. & Systems 2023-08-02 Minh Hieu Phan , Zhibin Liao , Johan W. Verjans , Minh-Son To

Endoscopy is the most widely used imaging technique for the diagnosis of cancerous lesions in hollow organs. However, endoscopic images are often affected by illumination artefacts: image parts may be over- or underexposed according to the…

Image and Video Processing · Electrical Eng. & Systems 2024-10-28 Axel Garcia-Vega , Ricardo Espinosa , Luis Ramirez-Guzman , Thomas Bazin , Luis Falcon-Morales , Gilberto Ochoa-Ruiz , Dominique Lamarque , Christian Daul

Image-to-image translation is a new field in computer vision with multiple potential applications in the medical domain. However, for supervised image translation frameworks, co-registered datasets, paired in a pixel-wise sense, are…

Computer Vision and Pattern Recognition · Computer Science 2021-02-02 Karim Armanious , Chenming Jiang , Sherif Abdulatif , Thomas Küstner , Sergios Gatidis , Bin Yang

A spatially regularized Gaussian mixture model, LapGM, is proposed for the bias field correction and magnetic resonance normalization problem. The proposed spatial regularizer gives practitioners fine-tuned control between balancing bias…

Medical Physics · Physics 2022-09-29 Luciano Vinas , Arash A. Amini , Jade Fischer , Atchar Sudhyadhom

Recent years have witnessed a growing academic and industrial interest in deep learning (DL) for medical imaging. To perform well, DL models require very large labeled datasets. However, most medical imaging datasets are small, with a…

Computer Vision and Pattern Recognition · Computer Science 2025-03-04 Minh H. Vu , Lorenzo Tronchin , Tufve Nyholm , Tommy Löfstedt