DocumentCode :
327705
Title :
Real-time monocular fixation control using the log-polar transformation and a confidence-based similarity measure
Author :
Ahrns, Ingo ; Neumann, Heiko
Author_Institution :
Res. & Technol., Daimler-Benz AG, Ulm, Germany
Volume :
1
fYear :
1998
fDate :
16-20 Aug 1998
Firstpage :
310
Abstract :
A new technique for the fixation task is proposed. The proposed technique is view-based and uses a gradient descent technique in order to maximize an intensity-based similarity measure between the reference image and the currently grabbed image during control time. A key constraint for the development of computational mechanisms is the achievement of real-time capability on low-cost hardware. We utilize the complex-logarithmic mapping of input images into log-polar space. In addition to a high compression rate this also supports better fixation performance using a space-variant image representation of the image. We further suggest a confidence based similarity measure to overcome the problem of distortions and partial occlusions during the movement of the camera which is the main problem of view-based approaches. We demonstrate the practicability of our method in a real world experiment which solves the fixation task at a frame rate of 16 Hz on an Intel P200 architecture without any special image processing hardware
Keywords :
active vision; closed loop systems; image representation; motion estimation; position control; real-time systems; active vision; closed loop systems; computer vision; confidence-based similarity; gradient descent method; image fixation; image representation; log-polar transformation; logarithmic mapping; monocular fixation control; position control; real-time systems; Cameras; Computer vision; Distortion measurement; Hardware; Image processing; Image representation; Motion estimation; Optical distortion; Target tracking; Time measurement;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Pattern Recognition, 1998. Proceedings. Fourteenth International Conference on
Conference_Location :
Brisbane, Qld.
ISSN :
1051-4651
Print_ISBN :
0-8186-8512-3
Type :
conf
DOI :
10.1109/ICPR.1998.711143
Filename :
711143
Link To Document :
بازگشت