Method for accurately recognizing liquid level by template matching

A template matching and accurate technology, applied in the field of liquid level recognition, can solve the problems of unsatisfactory accuracy and speed, and achieve the effect of high accuracy and fast speed

Active Publication Date: 2017-05-10
ELECTRIC POWER SCI RES INST OF GUIZHOU POWER GRID CO LTD +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a method for accurately identifying the liquid level using template matching to solve the technical problems of the liquid level detection in the substation, such as the accuracy and speed that cannot be satisfied by the traditional measurement method

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  • Method for accurately recognizing liquid level by template matching
  • Method for accurately recognizing liquid level by template matching
  • Method for accurately recognizing liquid level by template matching

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Embodiment Construction

[0039] A method for accurately identifying liquid levels using template matching, comprising:

[0040] Step 1. Take an image of the standard liquid level gauge and establish a standard template for the liquid level gauge;

[0041] The method for establishing the standard template of the liquid level gauge in step 1 is as follows: the image of the standard liquid level gauge is processed in gray scale to obtain the standard template of the liquid level gauge.

[0042] Take a typical image of the liquid level gauge. The standard template image is required to contain the image of the liquid level gauge. The image has high definition and the characteristics of the liquid level gauge are obvious. The size of the standard template image should not be too large or too small.

[0043] Step 2. Take an image containing a liquid level gauge in the substation, and use the method of principal component analysis to obtain the best projected grayscale image of the liquid level gauge;

[004...

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Abstract

The invention discloses a method for accurately recognizing a liquid level by template matching. The method comprises the following steps that step 1, a standard liquid level meter image is taken and a liquid level meter standard template is established; step 2, an image containing a liquid level meter is taken, an optimum projection gray level diagram of the liquid level meter is obtained by principal component analysis; step 3, the liquid level meter standard template is matched with the optimum projection gray level diagram of the liquid level meter; step 4, a liquid level meter image after matching is extracted; step 5, the scale position of the liquid level meter image after matching is recognized, the highest and lowest points of liquid level meter scales are read out, and the scale reading is determined by the proportion relation; the method for accurately recognizing the liquid level by template matching solves the technical problem in traditional measurement methods that the accuracy and speed are not satisfied in liquid level detection in substations.

Description

technical field [0001] The invention belongs to the liquid level identification technology, in particular to a method for accurately identifying the liquid level by template matching. Background technique [0002] Liquid level detection involves various fields such as scientific research, life, and industrial production. Various liquid level measurement devices have different characteristics according to the use environment and performance requirements. Some applications have high requirements for the measurement accuracy of liquid level measurement methods and devices, and some applications require continuous operation in certain harsh environments. ability. [0003] There are many technologies and products used in liquid level monitoring in the prior art, and there are more than ten kinds of traditional liquid level sensors classified according to the measurement technology and method of use. In recent years, many scientific research units at home and abroad are still de...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01F23/00G06T7/00G06T7/33
CPCG01F23/00G06T7/0004
Inventor 徐长宝高吉普杨华罗显跃辛明勇张历鲁彩江孟令雯林呈辉
Owner ELECTRIC POWER SCI RES INST OF GUIZHOU POWER GRID CO LTD
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