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Using image segmentation models to analyse high-resolution earth observation data: new tools to monitor disease risks in changing environments

pmid: 38764024
pmc: PMC11102859
Using image segmentation models to analyse high-resolution earth observation data: new tools to monitor disease risks in changing environments
Abstract Background In the near future, the incidence of mosquito-borne diseases may expand to new sites due to changes in temperature and rainfall patterns caused by climate change. Therefore, there is a need to use recent technological advances to improve vector surveillance methodologies. Unoccupied Aerial Vehicles (UAVs), often called drones, have been used to collect high-resolution imagery to map detailed information on mosquito habitats and direct control measures to specific areas. Supervised classification approaches have been largely used to automatically detect vector habitats. However, manual data labelling for model training limits their use for rapid responses. Open-source foundation models such as the Meta AI Segment Anything Model (SAM) can facilitate the manual digitalization of high-resolution images. This pre-trained model can assist in extracting features of interest in a diverse range of images. Here, we evaluated the performance of SAM through the Samgeo package, a Python-based wrapper for geospatial data, as it has not been applied to analyse remote sensing images for epidemiological studies. Results We tested the identification of two land cover classes of interest: water bodies and human settlements, using different UAV acquired imagery across five malaria-endemic areas in Africa, South America, and Southeast Asia. We employed manually placed point prompts and text prompts associated with specific classes of interest to guide the image segmentation and assessed the performance in the different geographic contexts. An average Dice coefficient value of 0.67 was obtained for buildings segmentation and 0.73 for water bodies using point prompts. Regarding the use of text prompts, the highest Dice coefficient value reached 0.72 for buildings and 0.70 for water bodies. Nevertheless, the performance was closely dependent on each object, landscape characteristics and selected words, resulting in varying performance. Conclusions Recent models such as SAM can potentially assist manual digitalization of imagery by vector control programs, quickly identifying key features when surveying an area of interest. However, accurate segmentation still requires user-provided manual prompts and corrections to obtain precise segmentation. Further evaluations are necessary, especially for applications in rural areas.
- University of Glasgow United Kingdom
- Institut du Cerveau France
- Universidad Peruana Cayetano Heredia Peru
- Sorbonne Paris Cité France
- French National Centre for Scientific Research France
Cartography, Artificial intelligence, Land cover, Geospatial analysis, UAV, Climate Change, Computer applications to medicine. Medical informatics, R858-859.7, Mosquito Vectors, FOS: Health sciences, Citizen science, Segment anything model, Segmentation, Health Sciences, Image Processing, Computer-Assisted, Humans, Animals, Global Impact of Arboviral Diseases, Remote sensing., Biology, Geography, Ecology, Python (programming language), Methodology, Public Health, Environmental and Occupational Health, Botany, Remote sensing, Computer science, Drone, Malaria, Operating system, Infectious Diseases, FOS: Biological sciences, Remote Sensing Technology, Land use, Geographic Information Systems, Medicine, Mosquito-borne diseases, Viral Hemorrhagic Fevers and Zoonotic Infections, Geographic information system
Cartography, Artificial intelligence, Land cover, Geospatial analysis, UAV, Climate Change, Computer applications to medicine. Medical informatics, R858-859.7, Mosquito Vectors, FOS: Health sciences, Citizen science, Segment anything model, Segmentation, Health Sciences, Image Processing, Computer-Assisted, Humans, Animals, Global Impact of Arboviral Diseases, Remote sensing., Biology, Geography, Ecology, Python (programming language), Methodology, Public Health, Environmental and Occupational Health, Botany, Remote sensing, Computer science, Drone, Malaria, Operating system, Infectious Diseases, FOS: Biological sciences, Remote Sensing Technology, Land use, Geographic Information Systems, Medicine, Mosquito-borne diseases, Viral Hemorrhagic Fevers and Zoonotic Infections, Geographic information system
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