A low-cost tracking method based on magnetic marker for capsule endoscope

Author(s):  
Xiaona Wang ◽  
M.Q.-H. Meng ◽  
Yawen Chan
2005 ◽  
Vol 02 (02) ◽  
pp. 113-121 ◽  
Author(s):  
XIAONA WANG ◽  
MAX Q.-H. MENG

This paper introduces a position and orientation tracking method, which has the potential to be used in capsule endoscope localization. This tracking method is based on the strength of the magnetic field generated by a magnetic marker in the space. Levenberg–Marquardt optimization algorithm is used for calculation of the parameters of the magnetic marker. The experiment results showed that when the axes of all sensors are all in one direction, the tracking results rely much on the orientation of the dipole. When the magnetic dipole is in sensor's axial direction, the tracking error is within 4 mm in a space of 60×60×100 mm enclosed by 8 hall sensors; the system is real time and quite robust. But the trackable scope becomes much smaller when the dipole has an arbitrary orientation. The reason is analyzed theoretically.


2007 ◽  
Vol 65 (5) ◽  
pp. AB347
Author(s):  
Jason A. Dominitz ◽  
Richard S. Johnston ◽  
C. David Melville ◽  
Michael B. Kimmey ◽  
Eric J. Seibel
Keyword(s):  
Low Cost ◽  

Author(s):  
Ahmed Hossam EL-Din ◽  
S.S Mekhamer ◽  
Hadi M.El-Helw

This paper shows a Comparison between Conventional Method [P&O] and particle swarm optimization [PSO] Based on MPPT Algorithms for Photovoltaic Systems under uniform irradiance and temperature. The main idea is to show that PSO method has a very high tracking speed and has the ability to track MPP under different environmental conditions in addition to an easy hardware implementation using a low-cost microcontroller. MATLAB simulations are carried out under very challenging conditions, namely irradiance and temperature, which reflect a change in the load [KW]. The proposed PSO tracking method Results will be compared with conventional method called [P&O] through MATLAB/SIMULINK.


Author(s):  
Timothy Garrett ◽  
Saverio Debernardis ◽  
Rafael Radkowski ◽  
Carl K. Chang ◽  
Michele Fiorentino ◽  
...  

Augmented reality (AR) applications rely on robust and efficient methods for tracking. Tracking methods use a computer-internal representation of the object to track, which can be either sparse or dense representations. Sparse representations use only a limited set of feature points to represent an object to track, whereas dense representations almost mimic the shape of an object. While algorithms performed on sparse representations are faster, dense representations can distinguish multiple objects. The research presented in this paper investigates the feasibility of a dense tracking method for rigid object tracking, which incorporates the both object identification and object tracking steps. We adopted a tracking method that has been developed for the Microsoft Kinect to support single object tracking. The paper describes this method and presents the results. We also compared two different methods for mesh reconstruction in this algorithm. Since meshes are more informative when identifying a rigid object, this comparison indicates which algorithm shows the best performance for this task and guides our future research efforts.


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