Instrument data reading method and system
A technology of instrument data and instrument, applied in the field of instrument data reading method and system, can solve the problem of low accuracy of instrument data and achieve the effect of ensuring accuracy
Active Publication Date: 2015-04-01
STATE GRID CHONGQING ELECTRIC POWER CO ELECTRIC POWER RES INST +2
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[0004] In view of this, the present invention provides a meter data reading method and system, which solves the problem that the existing data reading method based on Hough transform can only be applied to the scene with high image quality of the meter, while the reading based on the fitting pointer straight line The technical problem of low accuracy of instrument data obtained by the method
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[0042] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0043] At present, a variety of image-based instrument reading methods have been proposed at home and abroad. For example, Han Jiale et al. proposed an instrument data reading method based on the improved Hough transform. This method first uses an adaptive median filter algorithm to obtain a binary image, and then Use the improved Hough change to extract the readings of the straight line angle of the pointer; Fang Hua et al. proposed a reading recognition algor...
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The invention provides an instrument data reading method and a system. The method comprises the steps of acquiring a current data image of an instrument to be read, controlling the current data image to rotate in a first direction, acquiring current projection values of an instrument pointer in the current data current data in a vertical direction, selecting the maximum projection value from the obtained projection values, determining a position of the instrument pointer corresponding to the maximum projection value as a to-be-calculated position, after working out a first rotation angle required by the instrument pointer rotating to the to-be-calculated position, substituting the first rotation angle into a prestored first calculation formula, working out a first included angle between the instrument pointer and the to-be-calculated position, substituting the first included angle into a prestored corresponding relation between the included angle between the instrument pointer and the to-be-calculated position and an instrument scale, and calculating current instrument data of the instrument to be read. The method and system ensure precision of the obtained data under various conditions.
Description
technical field [0001] The present invention mainly relates to the technical field of data reading, and more specifically relates to a method and system for reading instrument data. Background technique [0002] At present, with the rapid development of image processing technology, it has been applied to instrument data reading, which solves the technical problems of slow speed and low accuracy of manual reading of instrument data. Specifically, after acquiring the image information of the meter, by extracting the feature information in the image information of the meter, and then using the pre-stored algorithm to process the feature, the display data of the meter can be obtained without manual participation, which greatly improves the reading efficiency of meter data . [0003] Based on the above ideas, in the prior art, commonly used instrument data reading methods include the data reading method based on Hough transform and the reading method based on the fitting pointer...
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IPC IPC(8): G06T3/60
CPCG06T3/602G06V2201/02G06F18/21G06T7/70G06T7/00G06T2207/20061
Inventor 宋伟伏进吴高林周庆张盈张文杰甘建峰王玉平张家齐胡海军梁海鹏
Owner STATE GRID CHONGQING ELECTRIC POWER CO ELECTRIC POWER RES INST