Intersection point feature extraction based digital identification method

A feature extraction and recognition method technology, applied in the field of digital recognition, can solve the problem of difficult to reflect the fine structure features of the pattern, and achieve the effect of ensuring anti-interference, ensuring recognition accuracy, and reducing the amount of calculation.

Inactive Publication Date: 2016-05-11
CHINA ELECTRIC POWER RES INST +1
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Problems solved by technology

The template matching method defines a standard pattern for each pattern class. This method is suitable for the recognition of printed numbers; the statistical decision-making method is formed on the basis of probability theory and mathematical statistics. It has strong anti-interference ability, but it is difficult to reflect The fine structure characteristics of the pattern; the neural network method needs to form a decision-making area through its own learning mechanism, the characteristics of the network are determined by the characteristics of the topological structure neurons, and use the state information to train the information of different states one by one to obtain a certain mapping, but this method relies too much on Selection of eigenvectors

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  • Intersection point feature extraction based digital identification method
  • Intersection point feature extraction based digital identification method
  • Intersection point feature extraction based digital identification method

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[0037] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0038] The digital character recognition in the seven-segment digital display instrument is to automatically recognize the digital content in the picture by using digital image processing, pattern recognition and other methods. The identification process of the seven-segment digital display instrument is as follows: figure 1 As shown, it includes five parts: video signal acquisition, image preprocessing, digital area location and segmentation, feature extraction and digital recognition.

[0039] Step 1: Image preprocessing. The preprocessing process includes grayscale, median filter and binarization. Grayscale adopts the weighted average of the RGB three components to obtain a more reasonable grayscale image; the median filter makes the surrounding pixel values ​​​​close to the real value, thereby eliminating isolated noise points; the maximum between-class...

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Abstract

The invention provides an intersection point feature extraction based digital identification method. The method comprises the following steps: (1) image preprocessing; (2) character zone positioning; (3) character segmentation; (4) intersection point feature extraction; and (5) character identification. According to the method, a noise zone is prevented from being misjudged to be a digit, so that the digital identification accuracy is improved; and under the condition of ensuring the identification precision and the anti-jamming property, the calculation amount is greatly reduced, the method has a relatively high application value for identifying a digital instrument in a power grid, and an instrument digital real-time identification system with a relatively good effect is realized. The method has the advantage that normalization and refinement processing does not need to be carried out in the processing method.

Description

technical field [0001] The invention relates to a digital recognition method, in particular to a digital recognition method based on intersection feature extraction. Background technique [0002] The seven-segment digital display instrument has many advantages such as easy reading, no need to estimate, high accuracy, adjustable mode and parameters, etc., and is widely used in various industries such as machinery, chemical industry, medicine, electronics, and finance. Due to the influence of the harsh environment in the power industry, manual operation is extremely dangerous, which is not conducive to artificially recording instrument data. The use of digital image processing technology and recognition technology can realize the automatic recognition of digital display instruments, which can not only improve work efficiency and ensure the accuracy rate, but also eliminate the danger of manual on-site operation. Very important practical value. [0003] For digital character ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06K9/46G06K9/40G06K9/54
CPCG06V10/30G06V10/20G06V10/44G06V2201/02G06V30/10
Inventor 张庚李丹
Owner CHINA ELECTRIC POWER RES INST
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