Method and apparatus for monitoring an analog meter

Details Method and apparatus for monitoring an analog meter Method and apparatus for monitoring an analog meter

2005-01-18

2005-01-18

Mehta, Bhavesh M. (Department: 2625)

Image analysis

Pattern recognition

Feature extraction

C340S688000, C340S870020, C348S026000, C348S135000, C348S160000, C356S606000, C356S613000, C356S615000, C382S151000, C382S202000, C382S203000, C382S260000, C382S284000, C382S287000

Reexamination Certificate

active

06845177

ABSTRACT:
A method and apparatus for remote monitoring of an analog meter is set out which employs a Hough Transform on the edge points of the meter scale to obtain the center of the scale. The graduation marks and the needle are detected from the intensity profile along various radii. Thereby, the meter reading can be flexibly adopted to different meter scales during an easy training process. The method can be modified for oblique reading of the scale.

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Robert Sablatnig et al., “Machine Vision for Automatic Calibration of Analog Display Instruments”, SPIE (1995), pp. 356-366, vol. 2423, Austria.
Robert Sablatnig et al., “Automatic Reading of Analog Display Instruments”, IEEE (1994), pp. 794-797, 1051-4651/94, Austria.
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