RESUMO
The very shallow marine basin of Puck Lagoon in the southern Baltic Sea, on the Northern coast of Poland, hosts valuable benthic habitats and cultural heritage sites. These include, among others, protected Zostera marina meadows, one of the Baltic's major medieval harbours, a ship graveyard, and likely other submerged features that are yet to be discovered. Prior to this project, no comprehensive high-resolution remote sensing data were available for this area. This article describes the first Digital Elevation Models (DEMs) derived from a combination of airborne bathymetric LiDAR, multibeam echosounder, airborne photogrammetry and satellite imagery. These datasets also include multibeam echosounder backscatter and LiDAR intensity, allowing determination of the character and properties of the seafloor. Combined, these datasets are a vital resource for assessing and understanding seafloor morphology, benthic habitats, cultural heritage, and submerged landscapes. Given the significance of Puck Lagoon's hydrographical, ecological, geological, and archaeological environs, the high-resolution bathymetry, acquired by our project, can provide the foundation for sustainable management and informed decision-making for this area of interest.
RESUMO
Contemporary technologies have positively affected everyday medical practice for the benefit of faster and more objective diagnoses. Image and video processing techniques have added potential to this effort, but still there is a long road ahead. In this paper a specially developed video processing methodology is described which determines the fetus velocity using B-mode ultrasonic video imaging. For that purpose, a semi-automated process using advanced computer vision and image processing tools is presented and evaluated. The results are presented with a detailed statistical analysis to verify the repeatability ad reliability of the method.
