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This work addresses the problem of designing a visual servo controller for a multirotor vehicle, with the end goal of tracking a moving spherical target with unknown radius. To address this problem, we first transform two bearing…

Systems and Control · Electrical Eng. & Systems 2025-10-16 Marcelo Jacinto , Rita Cunha

Optical Coherence Tomography Angiography (OCTA) is a non-invasive imaging technique that provides high-resolution cross-sectional images of the retina, which are useful for diagnosing and monitoring various retinal diseases. However, manual…

Image and Video Processing · Electrical Eng. & Systems 2023-11-07 Can Koz , Onat Dalmaz , Mertay Dayanc

Retinal vessel segmentation is of great interest for diagnosis of retinal vascular diseases. To further improve the performance of vessel segmentation, we propose IterNet, a new model based on UNet, with the ability to find obscured details…

Image and Video Processing · Electrical Eng. & Systems 2019-12-13 Liangzhi Li , Manisha Verma , Yuta Nakashima , Hajime Nagahara , Ryo Kawasaki

The segmentation of the retinal vasculature from eye fundus images represents one of the most fundamental tasks in retinal image analysis. Over recent years, increasingly complex approaches based on sophisticated Convolutional Neural…

Image and Video Processing · Electrical Eng. & Systems 2020-09-07 Adrian Galdran , André Anjos , José Dolz , Hadi Chakor , Hervé Lombaert , Ismail Ben Ayed

Blood vessel segmentation and -tracing are essential tasks in many medical imaging applications. Although numerous methods exist, the prevailing segment-then-fix paradigm is fundamentally limited regarding its suitability for modeling the…

Computer Vision and Pattern Recognition · Computer Science 2026-05-04 Rajalakshmi Palaniappan , Christoph Karg , Nemesio Navarro-Arambula , Peter Hirsch , Kristin Kraeker , Lisa Mais , Dagmar Kainmueller

Segmenting the retinal vasculature entails a trade-off between how much of the overall vascular structure we identify vs. how precisely we segment individual vessels. In particular, state-of-the-art methods tend to under-segment faint…

Computer Vision and Pattern Recognition · Computer Science 2019-03-28 Aashis Khanal , Rolando Estrada

Demographic studies suggest that changes in the retinal vasculature geometry, especially in vessel width, are associated with the incidence or progression of eye-related or systemic diseases. To date, the main information source for width…

Computer Vision and Pattern Recognition · Computer Science 2018-10-16 Fatmatulzehra Uslu , Anil Anthony Bharath

The enhancement and detection of elongated structures in noisy image data is relevant for many biomedical imaging applications. To handle complex crossing structures in 2D images, 2D orientation scores $U: \mathbb{R} ^ 2\times S ^ 1…

Computer Vision and Pattern Recognition · Computer Science 2017-11-28 M. H. J. Janssen , A. J. E. M. Janssen , E. J. Bekkers , J. Olivan Bescos , R. Duits

Retinal vessel information is helpful in retinal disease screening and diagnosis. Retinal vessel segmentation provides useful information about vessels and can be used by physicians during intraocular surgery and retinal diagnostic…

Computer Vision and Pattern Recognition · Computer Science 2018-02-23 M. Hajabdollahi , R. Esfandiarpoor , S. M. R. Soroushmehr , N. Karimi , S. Samavi , K. Najarian

Developing a robust object tracker is a challenging task due to factors such as occlusion, motion blur, fast motion, illumination variations, rotation, background clutter, low resolution and deformation across the frames. In the literature,…

Computer Vision and Pattern Recognition · Computer Science 2024-06-17 Sandeep Singh Sengar

Systemic diseases such as diabetes, hypertension, atherosclerosis are among the leading causes of annual human mortality rate. It is suggested that retinal and conjunctival vascular tortuosity is a potential biomarker for such systemic…

Image and Video Processing · Electrical Eng. & Systems 2021-01-05 Ashwin De Silva , Malsha V. Perera , Navodini Wijethilake , Saroj Jayasinghe , Nuwan D. Nanayakkara , Anjula De Silva

Inner Retinal neurons are a most essential part of the retina and they are supplied with blood via retinal vessels. This paper primarily focuses on the segmentation of retinal vessels using a triple preprocessing approach. DRIVE database…

Image and Video Processing · Electrical Eng. & Systems 2022-09-26 Mahendra Kumar Gourisaria , Vinayak Singh , Manoj Sahni

Eye tracking is an important tool with a wide range of applications in Virtual, Augmented, and Mixed Reality (VR/AR/MR) technologies. State-of-the-art eye tracking methods are either reflection-based and track reflections of sparse point…

Computer Vision and Pattern Recognition · Computer Science 2023-03-10 Tianfu Wang , Jiazhang Wang , Oliver Cossairt , Florian Willomitzer

With the advance of fluorescence imaging technologies, recently cell biologists are able to record the movement of protein vesicles within a living cell. Automatic tracking of the movements of these vesicles become key for qualitative…

Quantitative Methods · Quantitative Biology 2015-06-09 Min Xu

Image processing techniques provide important assistance to physicians and relieve their workload in different tasks. In particular, identifying objects of interest such as lesions and anatomical structures from the image is a challenging…

Medical Physics · Physics 2020-05-20 Meysam Tavakoli , Mahdieh Nazar

Methods for automated retinal vessel segmentation play an important role in the treatment and diagnosis of many eye and systemic diseases. With the fast development of deep learning methods, more and more retinal vessel segmentation methods…

Image and Video Processing · Electrical Eng. & Systems 2023-06-13 Gorana Gojić , Ognjen Kundačina , Dragiša Mišković , Dinu Dragan

In ophthalmological imaging, multiple imaging systems, such as color fundus, infrared, fluorescein angiography, optical coherence tomography (OCT) or OCT angiography, are often involved to make a diagnosis of retinal disease. Multi-modal…

Computer Vision and Pattern Recognition · Computer Science 2022-07-22 Aline Sindel , Bettina Hohberger , Andreas Maier , Vincent Christlein

Retinal imaging has emerged as a promising method of addressing this challenge, taking advantage of the unique structure of the retina. The retina is an embryonic extension of the central nervous system, providing a direct in vivo window…

Computer Vision and Pattern Recognition · Computer Science 2024-09-24 Syed Javed , Tariq M. Khan , Abdul Qayyum , Arcot Sowmya , Imran Razzak

Accurate cerebrovascular segmentation from Magnetic Resonance Angiography (MRA) and Computed Tomography Angiography (CTA) is of great significance in diagnosis and treatment of cerebrovascular pathology. Due to the complexity and topology…

Image and Video Processing · Electrical Eng. & Systems 2024-11-22 Zhanqiang Guo , Yao Luan , Jianjiang Feng , Wangsheng Lu , Yin Yin , Guangming Yang , Jie Zhou

Accurate retinal vessel segmentation is a challenging problem in color fundus image analysis. An automatic retinal vessel segmentation system can effectively facilitate clinical diagnosis and ophthalmological research. Technically, this…

Image and Video Processing · Electrical Eng. & Systems 2021-03-26 Muyi Sun , Guanhong Zhang