Meter reading operation system for gas meter

Abstract

The invention relates to a meter reading operation system for a gas meter, and the system comprises a network imaging device which is used for carrying out the imaging of a working scene of the gas meter under the triggering of a network control command, so as to obtain and output a corresponding instant scene image; and the correction processing mechanism is used for determining the search range of a reference coding block used when inter-frame coding is integrally executed on the instant scene image according to the color component numerical value repetition degree of the imaging area corresponding to the surface of the gas meter. According to the method and the device, the imaging area corresponding to the surface of the gas meter can be obtained by adopting a targeted visual analysis mechanism, and the search range of the reference coding block which is positively associated with the imaging area and is used when inter-frame coding is integrally performed on the instant scene image is determined according to the color component numerical value repetition degree of the imaging area corresponding to the surface of the gas meter; therefore, the effect and the rate of the inter-frame coding of the imaging picture of the working scene of the gas meter used for executing remote meter reading are both considered.

Description

Technical Field

[0001] The invention relates to the field of gas meter reading, and in particular to a meter reading operating system for a gas meter. Background Art

[0002] The gas meter and the locomotive have the same principle, relying on the pressure of the gas to do work and push the roller counter to count. The specific processing mode is as follows: the cylinder and piston mechanism in the locomotive are greatly simplified, and the cylinder is replaced by a "bellows" and the piston is replaced by a "film". The so-called "bellows" is just an empty box made of metal. The box is made of two halves, with a soft and airtight film in the middle. The middle part of the film is sandwiched by a metal sheet, which is a hard and unbendable "hard core", but the surrounding film is very soft, so that the hard core can move left and right in the box.

[0003] In the prior art, the image processing mechanism mode of the imaging picture of the working scene of the gas meter is relatively fixed, without taking into account the differences between the various sub-pictures in the imaging picture, and directly uses the conventional image processing mode, which lacks specificity. For example, it is impossible to determine the search range of the reference coding block used when performing inter-frame coding on the entire instant scene image that is positively associated with it according to the numerical repeatability of the color component of the imaging area corresponding to the surface of the gas meter, resulting in the image processing mechanism of the imaging picture of the working scene of the gas meter being too rigid. Summary of the invention

[0004] In order to solve the technical problems in the prior art, the present invention provides a meter reading operation system for a gas meter, which uses a network imaging device arranged opposite to the gas meter to perform imaging actions on the working scene of the gas meter under the triggering of a network control command to obtain and output a corresponding instant scene image, and successively performs a piecewise linear grayscale transformation operation, an image content sharpening operation using a spatial differential method, and an adaptive filtering operation on the received instant scene image to obtain and output a third mapping image with better image quality, and performs surface recognition processing based on a standard contour of the gas meter surface on the third mapping image with better image quality to obtain an imaging area corresponding to the gas meter surface, wherein the standard contour of the gas meter surface is an image of the gas meter taken of its surface in the factory state and only includes the surface, and also analyzes the red component values, green component values, and blue component values ​​corresponding to each component pixel point of the imaging area corresponding to the gas meter surface, and calculates the arithmetic repeatability of the red component value, the green component value, and the blue component value. The average value is used as the numerical repetition of the color component of the imaging area corresponding to the gas meter surface, and the search range of the reference coding block used when performing inter-frame coding on the instant scene image as a whole and which is positively associated with the numerical repetition of the color component of the imaging area corresponding to the gas meter surface is determined according to the numerical repetition of the color component of the imaging area corresponding to the gas meter surface. When inter-frame coding is performed on the instant scene image as a whole, the image block at the same position as the current coding block of the instant scene image in the inter-frame coding reference frame of the instant scene image is used as the co-located image block of the current coding block. The search range of the reference coding block used when performing inter-frame coding on the instant scene image as a whole is determined to be a square search range centered on the co-located image block in the inter-frame coding reference frame, thereby selecting the search range of the reference coding block used for matching inter-frame coding according to the color distribution complexity of the key area in the gas meter working scene imaging picture, i.e., the surface imaging area. The higher the color distribution complexity of the surface imaging area, the wider the search range used, thereby taking into account the effect and rate of inter-frame coding of the gas meter working scene imaging picture used for remote meter reading.

[0005] According to the present invention, a meter reading operating system for a gas meter is provided, the system comprising: A network imaging device is arranged opposite to the gas meter and is used to perform an imaging action on the working scene of the gas meter under the triggering of a network control command, so as to obtain and output a corresponding instant scene image; A first mapping device, connected to the network imaging device, for performing a piecewise linear grayscale transformation operation on the received instant scene image to obtain and output a corresponding first mapping image; a second mapping device, connected to the first mapping device, and configured to perform an image content sharpening operation using a spatial differential method on the received first mapping image, so as to obtain and output a corresponding second mapping image; a third mapping device, connected to the second mapping device, and configured to perform an adaptive filtering operation on the received second mapping image to obtain and output a corresponding third mapping image; a target recognition mechanism connected to the third mapping device, and configured to perform surface recognition processing based on a standard profile of the gas meter surface on the received third mapping image, so as to obtain an imaging area corresponding to the gas meter surface; a numerical analysis mechanism connected to the target recognition mechanism, for analyzing the respective red component values, the respective green component values, and the respective blue component values ​​corresponding to the respective constituent pixel points of the imaging area corresponding to the gas meter surface, and taking the arithmetic mean of the red component value repeatability, the green component value repeatability, and the blue component value repeatability as the color component value repeatability of the imaging area corresponding to the gas meter surface; A correction processing mechanism, connected to the numerical analysis mechanism, for determining a search range of a reference coding block used when performing inter-frame coding on the entire instant scene image according to the numerical repetitiveness of the color components of the imaging area corresponding to the surface of the gas meter; Among them, determining the search range of the reference coding block used when performing inter-frame coding on the instant scene image as a whole according to the numerical repetition of the color component of the imaging area corresponding to the surface of the gas meter includes: when performing inter-frame coding on the instant scene image as a whole, taking the image block at the same position as the current coding block of the instant scene image in the inter-frame coding reference frame of the instant scene image as the co-located image block of the current coding block, and determining the search range of the reference coding block used when performing inter-frame coding on the instant scene image as a whole is a square search range centered on the co-located image block in the inter-frame coding reference frame; Among them, determining the search range of the reference coding block used when performing inter-frame coding on the instant scene image as a whole based on the numerical repeatability of the color components of the imaging area corresponding to the gas meter surface also includes: the determined search range of the reference coding block used when performing inter-frame coding on the instant scene image as a whole is positively correlated with the numerical repeatability of the color components of the imaging area corresponding to the gas meter surface.

[0006] It can be seen that the present invention has at least the following main inventive concepts: Firstly, a network imaging device is arranged opposite to the gas meter to perform an imaging action on the working scene of the gas meter under the triggering of a network control command, so as to obtain and output a corresponding instant scene image, and a piecewise linear grayscale transformation operation, an image content sharpening operation using a spatial domain differential method, and an adaptive filtering operation are successively performed on the received instant scene image, so as to obtain and output a third mapping image with better image quality; Secondly: performing surface recognition processing based on the standard contour of the gas meter surface on the third mapping image with better image quality to obtain an imaging area corresponding to the gas meter surface, wherein the standard contour of the gas meter surface is an image of the gas meter taken of its surface in the factory state and only includes the surface; Finally: analyze the red component values, green component values ​​and blue component values ​​corresponding to the various pixel points in the imaging area corresponding to the gas meter surface, and use the arithmetic mean of the red component value repetition, the green component value repetition and the blue component value repetition as the color component value repetition of the imaging area corresponding to the gas meter surface. According to the color component value repetition of the imaging area corresponding to the gas meter surface, determine the search range of the reference coding block used when performing inter-frame coding on the instant scene image as a whole that is positively associated with it, wherein when performing inter-frame coding on the instant scene image as a whole, the inter-frame coding reference frame of the instant scene image that is related to the instant scene image is used. The image block at the same position of the current coding block of the instant scene image is used as the co-located image block of the current coding block, and the search range of the reference coding block used when performing inter-frame coding on the instant scene image as a whole is determined to be a square search range centered on the co-located image block in the inter-frame coding reference frame, so that the search range of the reference coding block used for matching inter-frame coding is selected according to the color distribution complexity of the key area, i.e., the surface imaging area, in the imaging picture of the gas meter working scene. The higher the color distribution complexity of the surface imaging area, the wider the search range used, thereby taking into account the effect and rate of inter-frame coding of the imaging picture of the gas meter working scene used for remote meter reading. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] The embodiments of the present invention will be described below with reference to the accompanying drawings, wherein:

[0008] Figure 1 The figure is a structural block diagram of a meter reading operating system for a gas meter according to a primary embodiment of the present invention.

[0009] Figure 2 It is a structural block diagram of a meter reading operating system for a gas meter according to a secondary embodiment of the present invention.

[0010] Figure 3 The figure is a structural block diagram of a meter reading operating system for a gas meter according to another embodiment of the present invention. DETAILED DESCRIPTION

[0011] The following will describe in detail an embodiment of a meter reading operating system for a gas meter according to the present invention with reference to the accompanying drawings.

[0012] Figure 1 The structure block diagram of the meter reading operation system for a gas meter according to the primary embodiment of the present invention is shown, and the system includes: A network imaging device is arranged opposite to the gas meter and is used to perform an imaging action on the working scene of the gas meter under the triggering of a network control command, so as to obtain and output a corresponding instant scene image; For example, a network imaging device is arranged opposite to a gas meter and is used to perform an imaging action on a working scene of the gas meter under the triggering of a network control command to obtain and output a corresponding instant scene image, including: the network imaging device has a built-in network transmission interface; A first mapping device, connected to the network imaging device, for performing a piecewise linear grayscale transformation operation on the received instant scene image to obtain and output a corresponding first mapping image; a second mapping device, connected to the first mapping device, and configured to perform an image content sharpening operation using a spatial differential method on the received first mapping image, so as to obtain and output a corresponding second mapping image; a third mapping device, connected to the second mapping device, and configured to perform an adaptive filtering operation on the received second mapping image to obtain and output a corresponding third mapping image; a target recognition mechanism connected to the third mapping device, and configured to perform surface recognition processing based on a standard profile of the gas meter surface on the received third mapping image, so as to obtain an imaging area corresponding to the gas meter surface; a numerical analysis mechanism connected to the target recognition mechanism, for analyzing the respective red component values, the respective green component values, and the respective blue component values ​​corresponding to the respective constituent pixel points of the imaging area corresponding to the gas meter surface, and taking the arithmetic mean of the red component value repeatability, the green component value repeatability, and the blue component value repeatability as the color component value repeatability of the imaging area corresponding to the gas meter surface; A correction processing mechanism, connected to the numerical analysis mechanism, for determining a search range of a reference coding block used when performing inter-frame coding on the entire instant scene image according to the numerical repetitiveness of the color components of the imaging area corresponding to the surface of the gas meter; Among them, determining the search range of the reference coding block used when performing inter-frame coding on the instant scene image as a whole according to the numerical repetition of the color component of the imaging area corresponding to the surface of the gas meter includes: when performing inter-frame coding on the instant scene image as a whole, taking the image block at the same position as the current coding block of the instant scene image in the inter-frame coding reference frame of the instant scene image as the co-located image block of the current coding block, and determining the search range of the reference coding block used when performing inter-frame coding on the instant scene image as a whole is a square search range centered on the co-located image block in the inter-frame coding reference frame; Wherein, determining the search range of the reference coding block used when performing inter-frame coding on the instant scene image as a whole according to the numerical repetition of the color component of the imaging area corresponding to the surface of the gas meter further includes: the determined search range of the reference coding block used when performing inter-frame coding on the instant scene image as a whole is positively correlated with the numerical repetition of the color component of the imaging area corresponding to the surface of the gas meter; The step of analyzing the respective red component values, the respective green component values, and the respective blue component values ​​corresponding to the respective component pixel points of the imaging area corresponding to the gas meter surface, and taking the arithmetic mean of the red component value repeatability, the green component value repeatability, and the blue component value repeatability as the color component value repeatability of the imaging area corresponding to the gas meter surface includes: determining the red component value repeatability based on the respective red component values, determining the green component value repeatability based on the respective green component values, and determining the blue component value repeatability based on the respective blue component values; The received third mapping image is subjected to surface recognition processing based on the standard contour of the gas meter surface to obtain an imaging area corresponding to the gas meter surface, which includes: the standard contour of the gas meter surface is an image of the gas meter surface taken in the factory state and only including the surface; Among them, the network imaging device is arranged opposite to the gas meter, and is used to perform imaging actions on the working scene of the gas meter under the triggering of the network control command to obtain and output the corresponding instant scene image, including: the network imaging device includes a network transceiver interface and a photoelectric sensing component connected to the network transceiver interface.

[0013] Figure 2 It is a structural block diagram of a meter reading operating system for a gas meter according to a secondary embodiment of the present invention.

[0014] Compared to Figure 1 , Figure 2 The meter reading operating system for a gas meter may also include: a voltage stabilizing actuator, disposed near the first mapping device, the second mapping device, the third mapping device and the target identification mechanism and connected to the first mapping device, the second mapping device, the third mapping device and the target identification mechanism respectively; Among them, the voltage stabilizing actuator is arranged near the first mapping device, the second mapping device, the third mapping device and the target identification mechanism and is respectively connected to the first mapping device, the second mapping device, the third mapping device and the target identification mechanism, including: the voltage stabilizing actuator is used to respectively perform the voltage stabilizing operations of the first mapping device, the second mapping device, the third mapping device and the target identification mechanism.

[0015] Figure 3The figure is a structural block diagram of a meter reading operating system for a gas meter according to another embodiment of the present invention.

[0016] Compared to Figure 1 , Figure 3 The meter reading operating system for a gas meter may also include: A wired communication mechanism is disposed near the first mapping device, the second mapping device, the third mapping device and the target identification mechanism and is connected to the first mapping device, the second mapping device, the third mapping device and the target identification mechanism respectively; Among them, the wired communication mechanism is arranged near the first mapping device, the second mapping device, the third mapping device and the target identification mechanism and is respectively connected to the first mapping device, the second mapping device, the third mapping device and the target identification mechanism, including: the wired communication mechanism is used to respectively realize the on-site configuration of the real-time working parameters of the first mapping device, the second mapping device, the third mapping device and the target identification mechanism.

[0017] Next, the specific structure of the meter reading operation system for a gas meter of the present invention will be further described.

[0018] In a meter reading operating system for a gas meter according to various embodiments of the present invention: A targeted adjustment mechanism is used to perform image data processing on the output data of the first mapping device, the second mapping device, the third mapping device and the target identification mechanism to obtain output processing data corresponding to the first mapping device, the second mapping device, the third mapping device and the target identification mechanism respectively.

[0019] In a meter reading operating system for a gas meter according to various embodiments of the present invention: Using a targeted adjustment mechanism to perform image data processing on the output data of the first mapping device, the second mapping device, the third mapping device and the target identification mechanism to obtain the output processing data corresponding to the first mapping device, the second mapping device, the third mapping device and the target identification mechanism respectively includes: performing adaptive filtering on the output data of the first mapping device, the second mapping device, the third mapping device and the target identification mechanism to obtain the output processing data corresponding to the first mapping device, the second mapping device, the third mapping device and the target identification mechanism respectively.

[0020] In a meter reading operating system for a gas meter according to various embodiments of the present invention: Using a targeted adjustment mechanism to perform image data processing on the output data of the first mapping device, the second mapping device, the third mapping device and the target identification mechanism to obtain the output processing data corresponding to the first mapping device, the second mapping device, the third mapping device and the target identification mechanism respectively includes: performing cubic polynomial interpolation on the output data of the first mapping device, the second mapping device, the third mapping device and the target identification mechanism to obtain the output processing data corresponding to the first mapping device, the second mapping device, the third mapping device and the target identification mechanism respectively.

[0021] In a meter reading operating system for a gas meter according to various embodiments of the present invention: Using a targeted adjustment mechanism to perform image data processing on the output data of the first mapping device, the second mapping device, the third mapping device and the target recognition mechanism to obtain the output processing data corresponding to the first mapping device, the second mapping device, the third mapping device and the target recognition mechanism respectively includes: performing vertical sharpening on the output data of the first mapping device, the second mapping device, the third mapping device and the target recognition mechanism to obtain the output processing data corresponding to the first mapping device, the second mapping device, the third mapping device and the target recognition mechanism respectively.

[0022] And in the meter reading operating system for a gas meter according to various embodiments of the present invention: Using a targeted adjustment mechanism to perform image data processing on the output data of the first mapping device, the second mapping device, the third mapping device and the target identification mechanism to obtain the output processing data corresponding to the first mapping device, the second mapping device, the third mapping device and the target identification mechanism respectively includes: performing morphological processing of first image dilation and then image erosion on the output data of the first mapping device, the second mapping device, the third mapping device and the target identification mechanism to obtain the output processing data corresponding to the first mapping device, the second mapping device, the third mapping device and the target identification mechanism respectively.

[0023] In addition, in the meter reading operating system for gas meters, the search range of the reference coding block used when performing inter-frame coding on the instant scene image as a whole is positively correlated with the color component numerical repetition of the imaging area corresponding to the gas meter surface, including: the higher the color component numerical repetition of the imaging area corresponding to the gas meter surface, the wider the search range of the reference coding block used when performing inter-frame coding on the instant scene image as a whole.

[0024] The meter reading operating system for gas meters of the present invention can adopt a targeted visual analysis mechanism to obtain the imaging area corresponding to the surface of the gas meter, and determine the search range of the reference coding block used when performing inter-frame coding on the entire instant scene image that is positively associated with the imaging area according to the color component numerical repeatability of the imaging area corresponding to the surface of the gas meter, thereby taking into account the effect and rate of inter-frame coding of the imaging picture of the working scene of the gas meter used for remote meter reading, and solving the above-mentioned technical problems.

[0025] Although only exemplary embodiments of the present invention have been described in detail above, those skilled in the art will readily appreciate that many variations are possible in these exemplary embodiments without materially departing from the novel principles and advantages of the present invention. Accordingly, all such variations are intended to be included within the scope of the present invention as defined by the following claims. In the claims, means and function clauses are intended to include structures described herein as performing the recited functions, and include not only structural equivalents, but also equivalent structures.

Claims

1. A meter reading operating system for a gas meter, characterized in that: The system comprises: A network imaging device is arranged opposite to the gas meter and is used to perform an imaging action on the working scene of the gas meter under the triggering of a network control command, so as to obtain and output a corresponding instant scene image; A first mapping device, connected to the network imaging device, for performing a piecewise linear grayscale transformation operation on the received instant scene image to obtain and output a corresponding first mapping image; a second mapping device, connected to the first mapping device, and configured to perform an image content sharpening operation using a spatial differential method on the received first mapping image, so as to obtain and output a corresponding second mapping image; a third mapping device, connected to the second mapping device, and configured to perform an adaptive filtering operation on the received second mapping image to obtain and output a corresponding third mapping image; a target recognition mechanism connected to the third mapping device, and configured to perform surface recognition processing based on a standard profile of the gas meter surface on the received third mapping image, so as to obtain an imaging area corresponding to the gas meter surface; a numerical analysis mechanism connected to the target recognition mechanism, for analyzing the respective red component values, the respective green component values, and the respective blue component values ​​corresponding to the respective constituent pixel points of the imaging area corresponding to the gas meter surface, and taking the arithmetic mean of the red component value repeatability, the green component value repeatability, and the blue component value repeatability as the color component value repeatability of the imaging area corresponding to the gas meter surface; A correction processing mechanism is connected to the numerical analysis mechanism, and is used to determine the search range of the reference coding block used when inter-frame coding is performed on the entire instant scene image according to the numerical repetition of the color component of the imaging area corresponding to the gas meter surface, including: when inter-frame coding is performed on the entire instant scene image, the image block at the same position as the current coding block of the instant scene image in the inter-frame coding reference frame of the instant scene image is used as the co-located image block of the current coding block, and the search range of the reference coding block used when inter-frame coding is performed on the entire instant scene image is determined to be a square search range centered on the co-located image block in the inter-frame coding reference frame; and the search range of the reference coding block used when inter-frame coding is performed on the entire instant scene image is positively correlated with the numerical repetition of the color component of the imaging area corresponding to the gas meter surface.

2. The meter reading operating system for a gas meter according to claim 1, characterized in that: Analyzing the respective red component values, the respective green component values, and the respective blue component values ​​corresponding to the respective component pixel points of the imaging area corresponding to the gas meter surface, and taking the arithmetic mean of the red component value repeatability, the green component value repeatability, and the blue component value repeatability as the color component value repeatability of the imaging area corresponding to the gas meter surface, including: determining the red component value repeatability based on the respective red component values, determining the green component value repeatability based on the respective green component values, and determining the blue component value repeatability based on the respective blue component values; The received third mapping image is subjected to surface recognition processing based on the standard contour of the gas meter surface to obtain an imaging area corresponding to the gas meter surface, which includes: the standard contour of the gas meter surface is an image of the gas meter surface taken in the factory state and only including the surface; Among them, the network imaging device is arranged opposite to the gas meter, and is used to perform imaging actions on the working scene of the gas meter under the triggering of the network control command to obtain and output the corresponding instant scene image, including: the network imaging device includes a network transceiver interface and a photoelectric sensing component connected to the network transceiver interface.

3. The meter reading operating system for a gas meter according to claim 2, characterized in that: The system further comprises: a voltage stabilizing actuator, disposed near the first mapping device, the second mapping device, the third mapping device and the target identification mechanism and connected to the first mapping device, the second mapping device, the third mapping device and the target identification mechanism respectively; Among them, the voltage stabilizing actuator is arranged near the first mapping device, the second mapping device, the third mapping device and the target identification mechanism and is respectively connected to the first mapping device, the second mapping device, the third mapping device and the target identification mechanism, including: the voltage stabilizing actuator is used to respectively perform the voltage stabilizing operations of the first mapping device, the second mapping device, the third mapping device and the target identification mechanism.

4. The meter reading operating system for a gas meter according to claim 2, characterized in that: The system further comprises: A wired communication mechanism is disposed near the first mapping device, the second mapping device, the third mapping device and the target identification mechanism and is connected to the first mapping device, the second mapping device, the third mapping device and the target identification mechanism respectively; Among them, the wired communication mechanism is arranged near the first mapping device, the second mapping device, the third mapping device and the target identification mechanism and is respectively connected to the first mapping device, the second mapping device, the third mapping device and the target identification mechanism, including: the wired communication mechanism is used to respectively realize the on-site configuration of the real-time working parameters of the first mapping device, the second mapping device, the third mapping device and the target identification mechanism.

5. The meter reading operating system for a gas meter according to any one of claims 2 to 4, characterized in that: A targeted adjustment mechanism is used to perform image data processing on the output data of the first mapping device, the second mapping device, the third mapping device and the target identification mechanism to obtain output processing data corresponding to the first mapping device, the second mapping device, the third mapping device and the target identification mechanism respectively.

6. The meter reading operating system for a gas meter according to claim 5, characterized in that: Using a targeted adjustment mechanism to perform image data processing on the output data of the first mapping device, the second mapping device, the third mapping device and the target identification mechanism to obtain the output processing data corresponding to the first mapping device, the second mapping device, the third mapping device and the target identification mechanism respectively includes: performing adaptive filtering on the output data of the first mapping device, the second mapping device, the third mapping device and the target identification mechanism to obtain the output processing data corresponding to the first mapping device, the second mapping device, the third mapping device and the target identification mechanism respectively.

7. The meter reading operating system for a gas meter according to claim 5, characterized in that: Using a targeted adjustment mechanism to perform image data processing on the output data of the first mapping device, the second mapping device, the third mapping device and the target identification mechanism to obtain the output processing data corresponding to the first mapping device, the second mapping device, the third mapping device and the target identification mechanism respectively includes: performing cubic polynomial interpolation on the output data of the first mapping device, the second mapping device, the third mapping device and the target identification mechanism to obtain the output processing data corresponding to the first mapping device, the second mapping device, the third mapping device and the target identification mechanism respectively.

8. The meter reading operating system for a gas meter according to claim 5, characterized in that: Using a targeted adjustment mechanism to perform image data processing on the output data of the first mapping device, the second mapping device, the third mapping device and the target recognition mechanism to obtain the output processing data corresponding to the first mapping device, the second mapping device, the third mapping device and the target recognition mechanism respectively includes: performing vertical sharpening on the output data of the first mapping device, the second mapping device, the third mapping device and the target recognition mechanism to obtain the output processing data corresponding to the first mapping device, the second mapping device, the third mapping device and the target recognition mechanism respectively.

9. The meter reading operating system for a gas meter according to claim 5, characterized in that: Using a targeted adjustment mechanism to perform image data processing on the output data of the first mapping device, the second mapping device, the third mapping device and the target identification mechanism to obtain the output processing data corresponding to the first mapping device, the second mapping device, the third mapping device and the target identification mechanism respectively includes: performing morphological processing of first image dilation and then image erosion on the output data of the first mapping device, the second mapping device, the third mapping device and the target identification mechanism to obtain the output processing data corresponding to the first mapping device, the second mapping device, the third mapping device and the target identification mechanism respectively.

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