Essays about: "Active contours"

Showing result 1 - 5 of 8 essays containing the words Active contours.

  1. 1. Skyline Delineation for Localization in Occluded Environments : Improved Skyline Delineation using Environmental Context from Deep Learning-based Semantic Segmentation

    University essay from KTH/Skolan för elektroteknik och datavetenskap (EECS)

    Author : Kyle William Coble; [2023]
    Keywords : Skyline delineation; Skyline detection; Semantic segmentation; Terrain based navigation; Digital elevation models; Uncrewed surface vessel; Planetary exploration robots; Horisont avgränsning; Horisont upptäckt; Semantisk segmentering; Terrängbaserad navigering; Digitala höjdmodeller; Obemannat ytfartyg; Planetariska utforskningsrobotar;

    Abstract : This thesis addresses the problem of improving the delineation of skylines, also referred to as skyline detection, in occluded and challenging environments where existing skyline delineation methods may struggle or fail. Delineated skylines can be used in monocular camera localization methods by comparing delineated skylines to digital elevation model data to estimate a position based on known terrain. READ MORE

  3. 2. Segmentation of White Blood Cells Using Deep Learning

    University essay from Lunds universitet/Matematik LTH

    Author : Sophia Grimmeiss Grahm; Desiré Nilsson; [2019]
    Keywords : Technology and Engineering;

    Abstract : The white blood cell count and differential is an important part of diagnosing a number of medical conditions. Instead of doing this by manual microscopy, CellaVision’s technology has automated the process of finding and classifying white blood cells. To support a diagnosis it is desired that the system can produce cytoplasm-to-nucleus-ratio. READ MORE

  4. 3. Segmentation of high frequency 3D ultrasound images for skin disease characterization

    University essay from KTH/Teknisk informationsvetenskap

    Author : Adrien Anxionnat; [2017]
    Keywords : level-set segmentation; active contours; optimization; statistical modeling; Blitz ;

    Abstract : This work is rooted in a need for dermatologists to explore skin characteristicsin depth. The inuence of skin disease such as acne in dermal tissues is stilla complex task to assess. Among the possibilities, high frequency ultrasoundimaging is a paradigm shift to probe and characterizes upper and deep dermis. READ MORE

  5. 4. Automatic Segmentation of Tissues in CT Images of the Pelvic Region

    University essay from Linköpings universitet/Institutionen för medicinsk teknik; Linköpings universitet/Tekniska högskolan

    Author : Martin Kardell; [2014]
    Keywords : Image segmentation; Computed tomography; Pelvic region; Prostate; Thresholding; Region growing; Atlas segmentation; Deformable models;

    Abstract : In brachytherapy, radiation therapy is performed by placing the radiation source into or very close to the tumour. When calculating the absorbed dose, water is often used as the radiation transport and dose scoring medium for soft tissues and this leads to inaccuracies. READ MORE

  6. 5. Vessel segmentation for time resolved phase contrast MRI

    University essay from Lunds universitet/Matematik LTH

    Author : Sebastian Bidhult; [2013]
    Keywords : Medical image analysis; Active contours; Euler Lagrange equations; Expectation Maximization algorithm.; Mathematics and Statistics;

    Abstract : Quantication of cardiovascular flow and blood volumes are useful tools in diagnosing cardiovascular disease such as congenital heart defects and different kinds of valve leakage. Medical imaging techniques enables non-invasive analysis of anatomy and physiology. READ MORE