2 research outputs found
Blood vessel enhancement via multi-dictionary and sparse coding: Application to retinal vessel enhancing
International audienceBlood vessel images can provide considerable information of many diseases, which are widely used by ophthalmologists for disease diagnosis and surgical planning. In this paper, we propose a novel method for the blood Vessel Enhancement via Multi-dictionary and Sparse Coding (VE-MSC). In the proposed method, two dictionaries are utilized to gain the vascular structures and details, including the Representation Dictionary (RD) generated from the original vascular images and the Enhancement Dictionary (ED) extracted from the corresponding label images. The sparse coding technology is utilized to represent the original target vessel image with RD. After that, the enhanced target vessel image can be reconstructed using the obtained sparse coefficients and ED. The proposed method has been evaluated for the retinal vessel enhancement on the DRIVE and STARE databases. Experimental results indicate that the proposed method can not only effectively improve the image contrast but also enhance the retinal vascular structures and details
Improved Flood Insights: Diffusion-Based SAR to EO Image Translation
Driven by rapid climate change, the frequency and intensity of flood events
are increasing. Electro-Optical (EO) satellite imagery is commonly utilized for
rapid response. However, its utilities in flood situations are hampered by
issues such as cloud cover and limitations during nighttime, making accurate
assessment of damage challenging. Several alternative flood detection
techniques utilizing Synthetic Aperture Radar (SAR) data have been proposed.
Despite the advantages of SAR over EO in the aforementioned situations, SAR
presents a distinct drawback: human analysts often struggle with data
interpretation. To tackle this issue, this paper introduces a novel framework,
Diffusion-Based SAR to EO Image Translation (DSE). The DSE framework converts
SAR images into EO images, thereby enhancing the interpretability of flood
insights for humans. Experimental results on the Sen1Floods11 and SEN12-FLOOD
datasets confirm that the DSE framework not only delivers enhanced visual
information but also improves performance across all tested flood segmentation
baselines.Comment: 10 pages, 6 figure