The research presented in this paper focuses on real-time image processing for visual servoing, i.e. the positioning of a x-y table by using a camera only instead of encoders. A camera image stream plus real-time image processing determines the position in the next iteration of the table controller. With a frame rate of 1000 fps, a maximum processing time of only 1 millisecond is allowed for each image of 80x80 pixels. This visual servoing task is performed on an OLED (Organic Light Emitting Diode) substrate that can be found in displays, with a typical size of 100 by 200 µm. The presented algorithm detects the center of an OLED well with sub-pixel accuracy (1 pixel equals 4 µm, sub-pixel accuracy reliable up to ±1 µm) and a computation time less than 1 millisecond. © 2009 Springer Berlin Heidelberg.
|Title of host publication||Proceedings of the 11th International Conference on Advanced Concepts for Intelligent Vision Systems(ACIVS 2009) 28 September - 2 October 2009, Bordeaux|
|Editors||J. Blanc-Talon, W. Philips, D. Popescu, P. Scheunders|
|Place of Publication||Berlin|
|Publication status||Published - 2009|
|Name||Lecture Notes in Computer Science|