Browsing by Subject "visual pattern mining"

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    Automatic Landmark Placement for Large 3D Facial Image Dataset
    (IEEE, 2019-12) Wang, Jerry; Fang, Shiaofen; Fang, Meie; Wilson, Jeremy; Herrick, Noah; Walsh, Susan; Computer and Information Science, School of Science
    Facial landmark placement is a key step in many biomedical and biometrics applications. This paper presents a computational method that efficiently performs automatic 3D facial landmark placement based on training images containing manually placed anthropological facial landmarks. After 3D face registration by an iterative closest point (ICP) technique, a visual analytics approach is taken to generate local geometric patterns for individual landmark points. These individualized local geometric patterns are derived interactively by a user's initial visual pattern detection. They are used to guide the refinement process for landmark points projected from a template face to achieve accurate landmark placement. Compared to traditional methods, this technique is simple, robust, and does not require a large number of training samples (e.g. in machine learning based methods) or complex 3D image analysis procedures. This technique and the associated software tool are being used in a 3D biometrics project that aims to identify links between human facial phenotypes and their genetic association.