RT Journal Article
JF IEEE Transactions on Pattern Analysis & Machine Intelligence
YR 1996
VO 18
IS
SP 1
TI An Active Testing Model for Tracking Roads in Satellite Images
A1 Bruno Jedynak,
A1 Donald Geman,
K1 Decision tree
K1 model-based tracking
K1 active testing
K1 roads
K1 SPOT images.
AB <p><b>Abstract</b>—We present a new approach for tracking roads from satellite images, and thereby illustrate a general computational strategy ("active testing") for tracking 1D structures and other recognition tasks in computer vision. Our approach is related to recent work in active vision on "where to look next" and motivated by the "divide-and-conquer" strategy of parlor games such as "Twenty Questions." We choose "tests" (matched filters for short road segments) one at a time in order to remove as much uncertainty as possible about the "true hypothesis" (road position) given the results of the previous tests. The tests are chosen <it>on-line</it> based on a statistical model for the joint distribution of tests and hypotheses. The problem of minimizing uncertainty (measured by entropy) is formulated in simple and explicit analytical terms. To execute this entropy testing rule we then alternate between data collection and optimization: At each iteration new image data are examined and a new entropy minimization problem is solved (exactly), resulting in a new image location to inspect, and so forth. We report experiments using panchromatic SPOT satellite imagery with a ground resolution of ten meters: Given a starting point and starting direction, we are able to rapidly track highways in southern France over distances on the order of one hundred kilometers without manual intervention.</p>
PB IEEE Computer Society, [URL:http://www.computer.org]
SN 0162-8828
LA English
DO 10.1109/34.476006
LK http://doi.ieeecomputersociety.org/10.1109/34.476006