@article{denzler1997active,
    type = {article},
    key = {denzler1997active},
    title = {Active Rays: Polar-transformed Active Contours for Real-Time Contour Tracking},
    author = {Joachim Denzler and Heinrich Niemann},
    journal = {Journal on Real-Time Imaging},
    year = {1997},
    note = {(to appear)},
    pages = {(to appear)},
    groups = {before2000},
    keywords = {Bild},
}