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Special vehicle instrument type identification and calibration method based on image characteristics

A special vehicle and type recognition technology, which is applied in character and pattern recognition, instruments, computer parts, etc., can solve problems such as uneven instrument scales, pointer fixed points, and difficulties in automatic identification of instrument scales.

Inactive Publication Date: 2013-04-10
63963 TROOP OF THE PLA +1
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  • Claims
  • Application Information

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Problems solved by technology

Special vehicle gauges are quite different from industrial gauges. Firstly, the fixed point of the pointer of special vehicle gauges is often not the center point of the gauge disc. Secondly, the scales of very large special vehicle gauges are often uneven. Automatic recognition poses great difficulties

Method used

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  • Special vehicle instrument type identification and calibration method based on image characteristics
  • Special vehicle instrument type identification and calibration method based on image characteristics
  • Special vehicle instrument type identification and calibration method based on image characteristics

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Embodiment Construction

[0056] The specific implementation of the present invention will be further described below in conjunction with the figures.

[0057] The overall flow chart of the implementation of the present invention is as follows figure 1 As shown, the process is as follows: After using the image acquisition system and equipment to obtain a real-time video image of a special vehicle instrument, the video data is transmitted to the computer, and the computer automatically recognizes the single instrument image. First extract the disk of the instrument image, and then normalize the instrument image according to the radius of the disk. After normalization, extract the color feature and Gabor texture feature respectively, and compare these two features with the feature template in the training sample. Carry out pattern matching, then get the meter classification result, and finally combine the two recognition results to get the meter type.

[0058] The acquisition feature template of the tr...

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Abstract

The invention provides a special vehicle instrument type identification and calibration method based on image characteristics, and belongs to the field of image processing and mode identification. The method includes the steps of firstly collecting several special vehicle instrument images according to each type of several special vehicle instruments, and reserving representative images as training samples through manual judgment, secondly carrying out normalization to quality of the images through an image preprocessing method according to each training sample, then extracting a disk of the instrument images and carrying out the size normalization to the instrument images according to radius of the disk, thirdly respectively extracting color features and Gabor texture features of the special vehicle instrument images after the normalization, and finally aiming at all training samples, and building models for each type of instruments through respectively using of the color features and the Gabor texture features as vector quantities. After the feature models of the training samples of each type of instruments are built, with regards to the collected real-time images, the method can also be used to carry out image preprocessing and image quality normalization, respectively carries out mode match aiming at the feature templates of each type of instrument training samples with the two features, and obtains instrument classifying results through a nearest neighbour rule.

Description

technical field [0001] The invention belongs to the field of image processing and pattern recognition, and is mainly aimed at the images of various types of special vehicle meters, automatically recognizes the types of special vehicle meters, and combines the previous calibration of various types of meters to provide pointer fixed points and The location of the gauge scale. Background technique [0002] Automatic detection technology is widely used in the production of special vehicle instruments, for example, when special vehicle instruments need to be automatically tested. For a long time, the calibration and measurement of special vehicle instruments have generally adopted manual reading methods. Although manual detection is accurate, it is very inconvenient. The employees who perform instrument verification need to manually check the pointer readings, compare with the standard source digital data, calculate the error, and save the results. When the pointer rotates quic...

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Application Information

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IPC IPC(8): G06K9/00G06K9/46G06K9/62
Inventor 张伏龙白真龙王涛郭迎春张华李广峰赵玉林张昌俊
Owner 63963 TROOP OF THE PLA
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