Camera shooting direct-reading meter reading instrument abnormal point eliminating method based on improved RANSAC
An abnormal point, normal technology, applied in the direction of instrument, character and pattern recognition, character recognition, etc., can solve problems such as low running speed and accuracy
Pending Publication Date: 2021-07-06
HUAXIA GENERAL PROCESSOR TECH INC +1
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[0005] The invention provides an improved RANSAC-based method for eliminating abnormal points of camera direct reading meter reading instruments, which is used to solve the problem of low running speed and low accuracy of conventional post-processing algorithms when removing a large number of abnormal points
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[0044] The preferred embodiments of the present invention will be described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described here are only used to illustrate and explain the present invention, and are not intended to limit the present invention.
[0045] The prior art most similar to the present invention is the traditional RANSAC-based outlier removal post-processing method. The principle of this method is: take all the identified digital points as a sample set, randomly select digital pairs in the sample set and connect them, count the number of digital points whose distance from the straight line is less than a certain threshold, and repeat this process until the number is not less than a certain threshold. Up to the value, all the number points that make up the number are normal numbers. For example, for a camera direct-reading meter reading instrument that handles 5-8 digit meters, the fixed value is oft...
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The invention relates to the field of intelligent meter reading of instruments, in particular to a camera shooting direct-reading meter reading instrument abnormal point eliminating method based on improved RANSAC. The method the following steps: step 1, inputting a digital point set S and algorithm parameters, and generating a digital pair index table P and a candidate index table P ', wherein the digital point set S is all digital points and coordinates thereof obtained by front-end image recognition, and comprises 5-8 normal digits and a plurality of abnormal digits which are wrongly recognized; step 2, searching whether the P contains residual to-be-selected number pairs or not; if yes, selecting a set of number pairs in sequence, solving the absolute value of the slope of the connecting line of the two points' 2jeemaa2 'k' 2jeemaa2 'and the distance g, and carrying out sequential execution; if not, skipping to the step 6; step 3, judging whether the'2jeemaa2 'k'2jeemaa2' >kThr or g>gThr; if not, executing in sequence; otherwise, deleting the number pair in the P, and skipping to the step 2; the application universality of the camera direct-reading meter reading instrument can be improved; the abnormal point elimination accuracy and stability can be improved, and the operation speed and stability can be improved.
Description
technical field [0001] The invention relates to the field of instrument intelligent meter reading, in particular to an improved RANSAC-based method for eliminating abnormal points of a camera direct-reading meter reading instrument. Background technique [0002] In recent years, with the increasing urbanization of the country, the people's demand for water, electricity, and gas has gradually increased, making the workload of meter reading and billing more and more, and it is becoming more and more difficult to meet the needs of the energy sector. The need for meter reading speed and accuracy. The emergence of camera direct reading meter reading instrument has greatly reduced the work intensity and operating cost of manual meter reading. While improving the real-time performance, accuracy and reliability of data acquisition, it can also complete the intelligent management of meters. The camera direct reading meter reading instrument collects data by taking pictures with an e...
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Login to View More IPC IPC(8): G06K9/32G06K9/62
CPCG06V20/62G06V10/757G06V2201/02G06V30/10G06F18/24
Inventor孙立娟潘云飞刘铁山
OwnerHUAXIA GENERAL PROCESSOR TECH INC