Real-Time Center Detection of an OLED Structure
نویسندگان
چکیده
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.
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