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Remote photoplethysmography (rPPG) is an innovative method for monitoring heart rate and vital signs by using a simple camera to record a person, as long as any part of their skin is visible. This low-cost, contactless approach helps in…

Computer Vision and Pattern Recognition · Computer Science 2025-10-08 Zahra Maleki , Amirhossein Akbari , Amirhossein Binesh , Babak Khalaj

Over recent years, increasingly complex approaches based on sophisticated convolutional neural network architectures have been slowly pushing performance on well-established benchmark datasets. In this paper, we take a step back to examine…

Image and Video Processing · Electrical Eng. & Systems 2021-12-22 Tariq M Khan , Antonio Robles-Kelly , Syed S. Naqvi

Retinal vessel segmentation is a crucial step in diagnosing and screening various diseases, including diabetes, ophthalmologic diseases, and cardiovascular diseases. In this paper, we propose an effective and efficient method for vessel…

Image and Video Processing · Electrical Eng. & Systems 2020-09-24 Zhun Fan , Jiajie Mo , Benzhang Qiu , Wenji Li , Guijie Zhu , Chong Li , Jianye Hu , Yibiao Rong , Xinjian Chen

Retinal template matching and registration is an important challenge in teleophthalmology with low-cost imaging devices. However, the images from such devices generally have a small field of view (FOV) and image quality degradations, making…

Image and Video Processing · Electrical Eng. & Systems 2018-11-30 Chen Gong , N. Benjamin Erichson , John P. Kelly , Laura Trutoiu , Brian T. Schowengerdt , Steven L. Brunton , Eric J. Seibel

Retinal Optical Coherence Tomography (OCT), a noninvasive cross-sectional scan of the eye with qualitative 3D visualization of the retinal anatomy is use to study the retinal structure and the presence of pathogens. The advent of the…

Image and Video Processing · Electrical Eng. & Systems 2023-02-28 Nchongmaje Ndipenoch , Alina Miron , Zidong Wang , Yongmin Li

Automated surface segmentation of retinal layer is important and challenging in analyzing optical coherence tomography (OCT). Recently, many deep learning based methods have been developed for this task and yield remarkable performance.…

Image and Video Processing · Electrical Eng. & Systems 2022-03-07 Hong Liu , Dong Wei , Donghuan Lu , Yuexiang Li , Kai Ma , Liansheng Wang , Yefeng Zheng

There are many Local texture features each very in way they implement and each of the Algorithm trying improve the performance. An attempt is made in this paper to represent a theoretically very simple and computationally effective approach…

Computer Vision and Pattern Recognition · Computer Science 2015-09-24 Abdullah Gubbi , Mohammed Fazle Azeem , Zahid Ansari

Many people are affected by diabetes around the world. This disease may have type 1 and 2. Diabetes brings with it several complications including diabetic retinopathy, which is a disease that if not treated correctly can lead to…

Image and Video Processing · Electrical Eng. & Systems 2020-01-17 Gilberto Luis De Conto Junior

Diabetic Retinopathy is the leading cause of blindness in the world. At least 90\% of new cases can be reduced with proper treatment and monitoring of the eyes. However, scanning the entire population of patients is a difficult endeavor.…

Computer Vision and Pattern Recognition · Computer Science 2018-12-04 Sudharshan Chandra Babu , Shishira R Maiya , Sivasankar Elango

Retinal vessel segmentation is an indispensable step for automatic detection of retinal diseases with fundoscopic images. Though many approaches have been proposed, existing methods tend to miss fine vessels or allow false positives at…

Computer Vision and Pattern Recognition · Computer Science 2017-07-03 Jaemin Son , Sang Jun Park , Kyu-Hwan Jung

The analysis of different image modalities is frequently performed in ophthalmology as it provides complementary information for the diagnosis and follow-up of relevant diseases, like hypertension or diabetes. This work presents a hybrid…

Computer Vision and Pattern Recognition · Computer Science 2018-04-04 Álvaro S. Hervella , José Rouco , Jorge Novo , Marcos Ortega

The histogram of oriented gradients (HOG) is a widely used feature descriptor in computer vision for the purpose of object detection. In the paper, a modified HOG descriptor is described, it uses a lookup table and the method of integral…

Computer Vision and Pattern Recognition · Computer Science 2017-03-21 Chunde Huang , Jiaxiang Huang

Medical image registration is vital for disease diagnosis and treatment with its ability to merge diverse information of images, which may be captured under different times, angles, or modalities. Although several surveys have reviewed the…

Computer Vision and Pattern Recognition · Computer Science 2024-03-26 Qiushi Nie , Xiaoqing Zhang , Yan Hu , Mingdao Gong , Jiang Liu

In order to estimate a registration model of eye fundus images made of an affinity and two radial distortions, we introduce an estimation criterion based on an error between the vessels. In [1], we estimated this model by minimising the…

Medical Physics · Physics 2019-07-22 Guillaume Noyel , R Thomas , S Iles , G Bhakta , A Crowder , D. Owens , P. Boyle

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

Medical image analysis has become a topic under the spotlight in recent years. There is a significant progress in medical image research concerning the usage of machine learning. However, there are still numerous questions and problems…

Image and Video Processing · Electrical Eng. & Systems 2018-05-16 Taha J. Alhindi , Shivam Kalra , Ka Hin Ng , Anika Afrin , Hamid R. Tizhoosh

Computer-generated holographic (CGH) displays show great potential and are emerging as the next-generation displays for augmented and virtual reality, and automotive heads-up displays. One of the critical problems harming the wide adoption…

Human-Computer Interaction · Computer Science 2021-08-16 Praneeth Chakravarthula , Zhan Zhang , Okan Tursun , Piotr Didyk , Qi Sun , Henry Fuchs

Retinal images provide early signs of diabetic retinopathy, glaucoma, and hypertension. These signs can be investigated based on microaneurysms or smaller vessels. The diagnostic biomarkers are the change of vessel widths and angles…

Computer Vision and Pattern Recognition · Computer Science 2016-05-24 Marta Favali , Samaneh Abbasi-Sureshjani , Bart ter Haar Romeny , Alessandro Sarti

Retinal image plays a crucial role in diagnosing various diseases, as retinal structures provide essential diagnostic information. However, effectively capturing structural features while integrating them with contextual information from…

Image and Video Processing · Electrical Eng. & Systems 2025-03-04 Xinwei Luo , Songlin Zhao , Yun Zong , Yong Chen , Gui-shuang Ying , Lifang He

In this paper, we propose an extraction method of HOG (histograms-of-oriented-gradients) features from encryption-then-compression (EtC) images for privacy-preserving machine learning, where EtC images are images encrypted by a block-based…

Computer Vision and Pattern Recognition · Computer Science 2019-04-30 Masaki Kitayama , Hitoshi Kiya
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