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Character wheel image calibrating device and control method thereof

A technology of a verification device and a control method, which is applied in character recognition, character and pattern recognition, instruments, etc., can solve the problems of low recognition accuracy of the verification device, unrecognizable high-speed tachometer, poor robustness of the recognition algorithm, etc., to achieve improved recognition Accuracy, reduction in processing time, and reduction in data volume

Pending Publication Date: 2018-08-17
成都创智联云科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] a. The positioning point of the character wheel fluctuates greatly, the measurement accuracy is not high, and the measurement error is as high as 1% or more;
[0005] b. The maximum limit speed that can be recognized is low, and some high speed meters cannot be recognized;
[0006] c. The robustness of the recognition algorithm is poor, and the recognition accuracy of the verification device is low

Method used

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  • Character wheel image calibrating device and control method thereof
  • Character wheel image calibrating device and control method thereof
  • Character wheel image calibrating device and control method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] Such as figure 1 As shown, a character wheel image verification device includes a camera 50, a main board 10, an SD memory card 30, a display screen 20 and a pulse generation module 40, and the main board 10 is an embedded system integrating a CPU, a graphics card, a memory, a bus and a GPIO. Mainboard 10; the signal output end of the camera 50 is connected to the first signal input end of the mainboard 10, the first signal output end of the mainboard 10 is connected to the signal input end of the SD memory card 30, and the signal of the SD memory card 30 The output end is connected to the second signal input end of the main board 10; the second signal output end of the main board 10 is connected to the signal input end of the display screen 20, and the display screen 20 includes a UI interface module 201, and the signal output of the display screen 20 terminal is connected to the third signal input terminal of the mainboard 10 through the UI interface module 201; the t...

Embodiment 2

[0049] This embodiment is on the basis of embodiment 1, as figure 2 As shown, the mainboard 10 includes an image acquisition module 101, an image preprocessing module 102, an image recognition module 103 and a control module 104; wherein:

[0050] An image acquisition module 101, configured to acquire image information from the camera 50;

[0051] The image preprocessing module 102 is used to call the algorithm in the SD memory card 30 to preprocess the acquired image information;

[0052] Image recognition module 103, for extracting the feature code of the preprocessed image information, and comparing;

[0053] The control module 104 is used for receiving and sending commands, and controlling the pulse generating module 40 to send pulses.

[0054] Through the image acquisition module 101, the image preprocessing module 102 and the image recognition module 103, the processing of image information is realized, so that the processing time of each frame of image is shortened t...

Embodiment 3

[0056] This embodiment is the method of embodiment 1,

[0057] Such as image 3 As shown, a control method of a character wheel image verification device includes the following steps:

[0058] a. Obtain image information and process the image information;

[0059] b. Determine whether the character wheel has rolled over a circle, if so, control the pulse generating module 40 to send a pulse; otherwise, do not send a pulse.

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Abstract

The invention discloses a character wheel image calibrating device. The device comprises a camera, a main board, an SD memory card, a display screen and a pulse generation module, wherein a signal output end of the camera is connected with a signal input end of the main board, and the main board is in bidirectional signal transmission with the SD memory card; the main board is in bidirectional signal transmission with the display screen; and a signal output end of the main board is connected with a signal input end of the pulse generation module. The invention further discloses a control method of the character wheel image calibrating device, the method comprises the steps that image information is acquired and processed; and if it is determined that a character wheel rolls a circle, the pulse generation module is controlled to send pulses. The character wheel image calibrating device and the control method thereof have the advantages that accelerated optimization is carried out on a hardware, the measuring precision is greatly improved, so that the measuring error is reduced to below 0.1%, the problem that a high-rotation-speed meter cannot be identified, multi-feature extractionand recognition are adopted, the recognition accuracy is improved, and the product adaptation is increased.

Description

technical field [0001] The invention relates to the technical field of image verification, in particular to a character wheel image verification device and a control method thereof. Background technique [0002] The word wheel image verification device is a measurement verification device used in the measurement industry of various word wheel meters to measure the deviation of the displayed value of the word wheel meter. It obtains the dynamic image of the character wheel through the camera, and processes it through the machine vision recognition algorithm to calculate the rotation speed of the meter character wheel, convert it into the indicated value of the meter (such as flow rate), and compare it with the value generated by the standard device (such as a standard flow meter). Calculate the indication deviation of the instrument. Therefore, the requirements for recognition reliability and measurement accuracy of the word wheel image verification device are very high. ...

Claims

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Application Information

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IPC IPC(8): G06K9/34G06K9/62G06K9/40G06K9/00
CPCG06V10/94G06V10/30G06V10/267G06V2201/02G06V30/10G06F18/22Y02D10/00
Inventor 代大友
Owner 成都创智联云科技有限公司
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