Multi-modal retinal image registration between 2D Ultra-Widefield (UWF) and narrow-angle (NA) images has not been well-studied, since most existing methods mainly focus on NA image alignment. The stereographic projection model used in UWF imaging causes strong distortions in peripheral areas, which leads to inferior alignment quality. We propose a distortion correction method that remaps the UWF images based on estimated camera view points of NA images. In addition, we set up a CNN-based registration pipeline for UWF and NA images, which consists of the distortion correction method and three networks for vessel segmentation, feature detection and matching, and outlier rejection. Experimental results on our collected dataset shows the effectiveness of the proposed pipeline and the distortion correction method.
Download full-text PDF |
Source |
|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC9359414 | PMC |
| http://dx.doi.org/10.1109/EMBC46164.2021.9631084 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
An Open-Source Algorithm for Correcting Stress Wave Dispersion in Split-Hopkinson Pressure Bar Experiments.
Sensors (Basel)
January 2025
School of Mechanical, Aerospace & Civil Engineering, University of Sheffield, Sheffield S1 3JD, UK.
Stress wave dispersion can result in the loss or distortion of critical high-frequency data during high-strain-rate material tests or blast loading experiments. The purpose of this work is to demonstrate the benefits of correcting stress wave dispersion in split-Hopkinson pressure bar experiments under various testing situations. To do this, an innovative computational algorithm, SHPB_Processing.
View Article and Find Full Text PDFAuthor Correction: Twin-distortion modulated ultra-low coordination PtRuNi-O catalyst for enhanced hydrogen production from chemical wastewater.
Nat Commun
January 2025
School of Chemistry and Molecular Engineering, Nanjing Tech University, 211816, Nanjing, China.
Horizontal Distortion Correction of AFM Images Based on Automatic Labeling of Feature Graphics.
Microsc Res Tech
January 2025
School of Electrical & Control Engineering, Shenyang Jianzhu University, Shenyang, China.
The atomic force microscope (AFM) image will be inclined and bent due to the tilt angle between the probe and the sample surface. When the least squares fitting method is used to correct the horizontal distortion of the AFM image, the shape structure that is lower or higher than the sample base will affect the final fitting correction result. In view of the limitations of existing methods and the diversity of AFM images, an AFM image level distortion correction method based on automatic feature marking is proposed.
View Article and Find Full Text PDFUse of a virtual phantom to assess the capability of a treatment planning system to perform magnetic resonance image distortion correction.
Phys Eng Sci Med
January 2025
Physics Department, Instituto Zunino, Obispo Oro 423, X5000BFI, Córdoba, Argentina.
Article Synopsis
- Treatment Planning Systems (TPS) are evaluated for their effectiveness in correcting distortions in Magnetic Resonance (MR) images using a virtual phantom and Control Points (CPs).
- The study involved creating distorted MR images and applying TPS, with findings showing that distortion caused median deviations of 1.8 mm, which were reduced to 0.6 mm after correction.
- Structural Similarity Metric (SSIM) tests indicated significant improvements in image quality, with the TPS successfully reducing distortions to levels acceptable for radiosurgery.
Extended homogeneous field correction method based on oblique projection in OPM-MEG.
Neuroimage
January 2025
Key Laboratory of Ultra-Weak Magnetic Field Measurement Technology, Ministry of Education, School of Instrumentation and Optoelectronic Engineering, Beihang University, 100191, Beijing, China; Hangzhou Institute of Extremely-Weak Magnetic Field Major National Science and Technology Infrastructure, Hangzhou, 310051, China; State Key Laboratory of Traditional Chinese Medicine Syndrome/Health Construction Center, The Second Affiliated Hospital of Guangzhou University of Chinese Medicine, Guangzhou, 510120, China; Hefei National Laboratory, Hefei, 230088, China. Electronic address:
Article Synopsis
- OPM-MEG is a new non-invasive imaging technique that improves sensor flexibility but requires better noise suppression due to environmental factors.
- Existing methods like homogeneous field correction (HFC) and spatiotemporal extended HFC (teHFC) have limitations in dealing with complex noise.
- The proposed oblique projection method (opHFC) enhances noise suppression by accommodating non-orthogonal signal and noise subspaces, leading to improved signal quality in OPM-MEG applications.
Want AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!