This paper describes a method that can be used to track the single moving object automatically in multiple scenes. After preprocessing of the original image sequence, which is sampled from the video camera, the optical flow of the moving object in multiple scenes will be calculated rapidly with the improved algorithm. The moving object region can be extracted completely through several processing of the optical flow field such as region-connection, region- merging, and region-clustering methods. Then, the results of these processing can be used to measure the speed and direction of the moving object quantitatively, and can be used to output the control signal to drive the tracker for tracking the fast-moving object.14
For navigating inside the patient's body, the physician needs to know exactly the 3D position of endoscope probe. We develop a new approach to determine the 3D position of endoscope inside the body using harmless magnetic field, and the pose of endoscope tip by attached a 3D magnetic sensor to endoscope. The experience of this research can be conducted for solving the positioning problem of endoscope inside the patient's body.
The research on how to determine the 3D position of endoscope by using magnetic field has been conducted for solving the positioning problem of endoscope inside the patient's body by using harmless magnetic field. We develop a new approach to determine the position of endoscope inside the body using magnetic field, and the pose of endoscope tip by attached a 3D magnetic sensor to endoscope.
In order to reduce the X-ray dose in the endoscopic examination and theory, we are developing an inside-body navigation system which can give and visualize the direct 3D position of the tip and trace of the endoscope instead of the conventional 2D X-ray fluoroscopy. In this paper, we describe a method of identifying 3D position and direction of ultrasound scanning probe inserted into inside of the body, which gives endoscopic images. We use marker transducers placed on surface of the body, which transmit pulses synchronized to the ultrasound scanner. The method of measuring position (direction and distance between scanning probe inside of body and transducer outside of body) of marker on the scanned image itself obtained with ultrasound endoscope by using adaptive threshold and robust algorithm is described. Further, we give some results of confirmation experiments, and discuss them.
Access to the requested content is limited to institutions that have purchased or subscribe to SPIE eBooks.
You are receiving this notice because your organization may not have SPIE eBooks access.*
*Shibboleth/Open Athens users─please
sign in
to access your institution's subscriptions.
To obtain this item, you may purchase the complete book in print or electronic format on
SPIE.org.
INSTITUTIONAL Select your institution to access the SPIE Digital Library.
PERSONAL Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.