CN104715267A - Electric energy meter model detection system based on visual identification - Google Patents
Electric energy meter model detection system based on visual identification Download PDFInfo
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Abstract
The invention relates to an electric energy meter model detection system based on visual identification. The detection system comprises an image acquisition device, an image preprocessing device, a Freescale IMX6 processing device and a static storage device; the image acquisition device is used for photographing an electric energy meter to obtain the appearance image of the electric energy meter; the static storage device is used for prestoring various reference electric energy meter images; the image preprocessing device is connected with the image acquisition device, and used for preprocessing the appearance image of the electric energy meter to output a preprocessed appearance image; the Freescale IMX6 processing device is connected with the image preprocessing device and the static storage device, respectively, and used for identifying the electric energy meter model corresponding to the preprocessed appearance image based on the various reference electric energy meter images and outputting the identified electric energy meter model as a target electric energy meter model. According to the electric energy meter model detection system based on visual identification, accurate reference data can be provided for the power supply sector and important basis is provided for the supervision of the power supply sector on the electric energy meters.
Description
Technical field
The present invention relates to electric energy meter field, particularly relate to a kind of electric energy meter model detection system of view-based access control model identification.
Background technology
Electric energy meter can be classified as follows: by purposes: active electric energy meter, reactive energy-meter, maximum demand meter, standard electric energy meter, multi tariff time-sharing electric energy meter, prepayment meter (point coin-feed, magnetic card type, electric card type), loss electric energy meter, by principle of work: induction type (mechanical type), state type (electronic type), electromechanical (hybrid); By access power supply natures: alternating-current meter, direct current table; By structure: monoblock type, split type; By access phase line: single-phase, phase three-wire three, three-phase and four-line electric energy meter; By class of accuracy: common installing type electric energy meter (0.2S, 0.5S, 0.2.0.5.1.0,2.0 grades) and the accurate electric energy meter (0.01,0.05,0.2 grade) of portable type; By installing the mode of connection: direct access, indirectly access type.
Widely distributed due to electric energy meter numerous types, puzzlement is brought to the supervision of power supply department, when power supply department carries out remote meter reading or periodic maintenance to electric energy meter, the key message that first will obtain is the type of the electric energy meter of each position, just can carry out corresponding reading collection and customization maintenance service after determining electric energy meter type.To each installation site, type confirmation is carried out to dissimilar electric energy meter by arrangement personnel in prior art, this means too rely on manually, take time and effort, also there are some electronic recognition means, but existing electronic recognition means cannot ensure type identification precision in inclement weather.
Therefore, need a kind of new electric energy meter model detection system, while substituting loaded down with trivial details artificial cognition operation, also inclement weather especially haze weather interference that electric energy meter type identification is brought can be overcome, thus efficiently and in real time for power supply department provides important referential data, facilitate the management of power use and the plant maintenance of power supply department.
Summary of the invention
In order to solve the problem, the invention provides a kind of electric energy meter model detection system of view-based access control model identification, introduce high-precision acquisition technology, image recognition technology realizes the accurate identification to electric energy meter profile, introducing wireless communication technology realizes the high efficiency of transmission to electric energy meter type and position, on this basis, according to atmospheric attenuation model determination haze to the influence factor of image, mist elimination process is carried out to the electric energy meter outside drawing picture gathered under haze weather, obtain electric energy meter outside drawing picture clearly, thus to the unfavorable interference of electric energy meter type identification under minimizing inclement weather.
According to an aspect of the present invention, provide a kind of electric energy meter model detection system of view-based access control model identification, described detection system comprises image capture device, image-preprocessing device, Freescale IMX6 treatment facility and static storage device, described image capture device is used for electric energy meter shooting to obtain electric energy meter outside drawing picture, described static storage device has prestored all kinds of benchmark electric energy meter pattern, described image-preprocessing device is connected with described image capture device, pre-service is carried out to export pre-service outside drawing picture to described electric energy meter outside drawing picture, described Freescale IMX6 treatment facility is connected respectively with described image-preprocessing device and described static storage device, based on electric energy meter type corresponding to pre-service outside drawing picture described in all kinds of benchmark electric energy meter pattern identification to export as target electric energy meter type.
More specifically, in the electric energy meter model detection system of described view-based access control model identification, also comprise: positioning equipment, be connected with described Freescale IMX6 treatment facility, for locating in real time described detection system, and export current location data to described Freescale IMX6 treatment facility, Wireless Telecom Equipment, is connected with described Freescale IMX6 treatment facility, for described target electric energy meter type and described current location data being packed, is exported the packet of packing and obtaining by wireless communication link, SD card, is connected with described Freescale IMX6 treatment facility, for target electric energy meter type described in real-time storage and described current location data, power supply, comprise solar powered device, accumulator, change-over switch and electric pressure converter, described change-over switch is connected respectively with described solar powered device and described accumulator, determine whether be switched to described solar powered device to be powered by described solar powered device according to accumulator dump energy, described electric pressure converter is connected with described change-over switch, with the 5V voltage transitions will inputted by change-over switch for 3.3V voltage, LCDs, is connected with described Freescale IMX6 treatment facility, for showing described target electric energy meter type and described current location data in real time, mist elimination treatment facility, between described image-preprocessing device and described Freescale IMX6 treatment facility, for receiving described pre-service outside drawing picture, mist elimination process is carried out to obtain mist elimination outside drawing picture to described pre-service outside drawing picture, described mist elimination outside drawing picture is inputted described Freescale IMX6 treatment facility to carry out electric energy meter type identification to obtain target electric energy meter type, described mist elimination treatment facility comprises: haze Concentration Testing subset, is arranged in air, for detecting the haze concentration of electric energy meter position in real time, and removes intensity according to haze concentration determination haze, and described haze removes intensity value between 0 to 1, overall air light value obtains subset, is connected to obtain described pre-service outside drawing picture, calculates the gray-scale value of each pixel in described pre-service outside drawing picture, by the gray-scale value of pixel maximum for gray-scale value air light value as a whole with described image-preprocessing device, atmospheric scattering light value obtains subset, be connected respectively with described image-preprocessing device and described haze Concentration Testing subset, to each pixel of described pre-service outside drawing picture, extract its R, G, in B tri-Color Channel pixel value, minimum value is as target pixel value, use and keep the Gaussian filter EPGF (edge-preserving gaussian filter) at edge to carry out filtering process to obtain filtered target pixel value to described target pixel value, target pixel value is deducted filtered target pixel value to obtain object pixel difference, EPGF is used to carry out filtering process to obtain filtered target pixel value difference to object pixel difference, filtered target pixel value is deducted filtered target pixel value difference and remove reference value to obtain haze, haze is removed intensity and be multiplied by haze removal reference value to obtain haze removal threshold value, get haze and remove minimum value in threshold value and target pixel value as comparison reference, get the atmospheric scattering light value of the maximal value in comparison reference and 0 as each pixel, medium transmission rate obtains subset, obtain subset and described atmospheric scattering light value with described overall air light value to obtain subset and be connected respectively, the atmospheric scattering light value of each pixel is removed value divided by overall air light value to obtain, deducts 1 described except value is to obtain the medium transmission rate of each pixel, sharpening Image Acquisition subset, with described image-preprocessing device, described overall air light value obtains subset and is connected respectively with described medium transmission rate acquisition subset, the medium transmission rate of each pixel is deducted to obtain the first difference by 1, described first difference is multiplied by overall air light value to obtain product value, the pixel value of each pixel in described pre-service outside drawing picture is deducted described product value to obtain the second difference, by described second difference divided by the medium transmission rate of each pixel to obtain the sharpening pixel value of each pixel, in described pre-service outside drawing picture, the pixel value of each pixel comprises the R of each pixel in described pre-service outside drawing picture, G, B tri-Color Channel pixel value, correspondingly, the sharpening pixel value of each pixel obtained comprises the R of each pixel, G, B tri-Color Channel sharpening pixel value, the sharpening pixel value composition mist elimination outside drawing picture of all pixels, described Freescale IMX6 treatment facility is connected respectively with described mist elimination treatment facility and described static storage device, mated one by one with described all kinds of benchmark electric energy meter pattern by described mist elimination outside drawing picture, the type of output matching successful benchmark electric energy meter pattern exports as target electric energy meter type, wherein, each benchmark electric energy meter pattern of prestoring of described static storage device is for taking obtained image in advance to each benchmark electric energy meter profile, described image-preprocessing device also comprises contrast enhancement processing subset and wavelet filtering subset, described contrast enhancement processing subset is connected with described image capture device, for carrying out contrast enhancement processing to described electric energy meter outside drawing picture, obtain and strengthen electric energy meter outside drawing picture, described wavelet filtering subset is connected with described contrast enhancement processing subset, based on Haar wavelet filter, wavelet filtering process is carried out to described enhancing electric energy meter outside drawing picture, to obtain described pre-service outside drawing picture.
More specifically, in the electric energy meter model detection system of described view-based access control model identification, described Freescale IMX6 treatment facility also carries out OCR identification to described mist elimination outside drawing picture, to obtain the current reading of described electric energy meter.
More specifically, in the electric energy meter model detection system of described view-based access control model identification, described image capture device comprises front cover glass, camera lens, filter and image-forming electron unit.
More specifically, in the electric energy meter model detection system of described view-based access control model identification, described haze Concentration Testing subset, described overall air light value obtain subset, described atmospheric scattering light value obtains subset, described medium transmission rate obtains subset and described sharpening Image Acquisition subset is integrated on one piece of surface-mounted integrated circuit, and adopt different fpga chips respectively to realize.
More specifically, in the electric energy meter model detection system of described view-based access control model identification, the type selecting of the fpga chip that described haze Concentration Testing subset, described overall air light value acquisition subset, described atmospheric scattering light value acquisition subset, described medium transmission rate acquisition subset and described sharpening Image Acquisition subset adopt is all the Artix-7 series of Xilinx company.
Accompanying drawing explanation
Below with reference to accompanying drawing, embodiment of the present invention are described, wherein:
Fig. 1 is an embodiment of the electric energy meter model detection system according to view-based access control model identification of the present invention.
Fig. 2 is the another embodiment of the electric energy meter model detection system according to view-based access control model identification of the present invention.
Embodiment
Below with reference to accompanying drawings the embodiment of the electric energy meter model detection system of view-based access control model identification of the present invention is described in detail.
Electric energy meter is used to the instrument measuring electric energy, and also known as watt-hour meter, energy meter, kilowatt-hour table, referring to the instrument measuring various electrical quantities, is the instrument being used for measuring section electric energy aggregate-value sometime specially.
The principle of work of electric energy meter is as follows: when electric energy meter access circuit-under-test, just have exchange current to flow through in current coil and potential winding, these two exchange current produce the magnetic flux of alternation respectively in their iron core; Alternating flux, through aluminium dish, induces eddy current in aluminium dish; Eddy current is subject to again the effect of power in magnetic field, thus makes aluminium dish obtain torque (initiatively moment) and rotate.The power of load consumption is larger, larger by the electric current of current coil, and the eddy current induced in aluminium dish is also larger, and the moment that aluminium dish is rotated is larger.Namely the size of torque follows the power of load consumption to be directly proportional.Power is larger, and torque is also larger, and aluminium dish rotates also faster.When aluminium dish rotates, be subject to again the effect of the braking moment that permanent magnet produces, braking moment is with initiatively moment direction is contrary; The size of braking moment is directly proportional to the rotating speed of aluminium dish, and aluminium dish rotates faster, and braking moment is also larger.When active moment and braking moment reach transient equilibrium, aluminium dish is by uniform rotation.The electric energy that load consumes is directly proportional to the revolution of aluminium dish.When aluminium dish rotates, drive counter, consumed electric energy is indicated.The simple procedure of electric energy meter work that Here it is.
Widely distributed due to electric energy meter numerous types, distributing position is complicated, and therefore existing artificial type detection mode and simple detection of electrons mode cannot meet efficient and high-precision double requirements simultaneously.For this reason, the present invention has built a kind of electric energy meter model detection system of view-based access control model identification, meet efficient requirement by image acquisition and image recognition technology, overcome the negative effect of electric energy meter reading being read under inclement weather by the process of mist elimination haze thus meet high-precision requirement.
Fig. 1 is an embodiment of the electric energy meter model detection system according to view-based access control model identification of the present invention, wherein, described detection system comprises image capture device 1, image-preprocessing device 2, Freescale IMX6 treatment facility 3, static storage device 4 and power supply 5, described image capture device 1 is for taking electric energy meter to obtain electric energy meter outside drawing picture, described static storage device 4 has prestored all kinds of benchmark electric energy meter pattern, described image-preprocessing device 2 is connected with described image capture device 1, pre-service is carried out to export pre-service outside drawing picture to described electric energy meter outside drawing picture, described Freescale IMX6 treatment facility 3 is connected respectively with described image-preprocessing device 2 and described static storage device 4, based on electric energy meter type corresponding to pre-service outside drawing picture described in all kinds of benchmark electric energy meter pattern identification to export as target electric energy meter type.
Then, with reference to Fig. 2, the another embodiment of the electric energy meter model detection system of view-based access control model identification of the present invention is described.With Fig. 1 unlike, in the embodiment of Fig. 2, add the mist elimination treatment facility 6 between described image-preprocessing device 2 and described Freescale IMX6 treatment facility 3.Continue to carry out structure to the system of Fig. 2 to be described as follows.
Described detection system also comprises: positioning equipment, is connected with described Freescale IMX6 treatment facility 3, for locating in real time described detection system, and exports current location data to described Freescale IMX6 treatment facility 3;
Described detection system also comprises: Wireless Telecom Equipment, is connected with described Freescale IMX6 treatment facility 3, for described target electric energy meter type and described current location data being packed, is exported the packet of packing and obtaining by wireless communication link;
Described detection system also comprises: SD card, is connected, for target electric energy meter type described in real-time storage and described current location data with described Freescale IMX6 treatment facility 3;
Described power supply 5, comprise solar powered device, accumulator, change-over switch and electric pressure converter, described change-over switch is connected respectively with described solar powered device and described accumulator, determine whether be switched to described solar powered device to be powered by described solar powered device according to accumulator dump energy, described electric pressure converter is connected with described change-over switch, with the 5V voltage transitions will inputted by change-over switch for 3.3V voltage;
Described detection system also comprises: LCDs, is connected with described Freescale IMX6 treatment facility 3, for showing described target electric energy meter type and described current location data in real time;
Described mist elimination treatment facility 6, between described image-preprocessing device 2 and described Freescale IMX6 treatment facility 3, for receiving described pre-service outside drawing picture, mist elimination process is carried out to obtain mist elimination outside drawing picture to described pre-service outside drawing picture, described mist elimination outside drawing picture is inputted described Freescale IMX6 treatment facility 3 to carry out electric energy meter type identification to obtain target electric energy meter type;
Described mist elimination treatment facility 6 comprises further:
Haze Concentration Testing subset, is arranged in air, for detecting the haze concentration of electric energy meter position in real time, and removes intensity according to haze concentration determination haze, and described haze removes intensity value between 0 to 1;
Overall air light value obtains subset, is connected to obtain described pre-service outside drawing picture, calculates the gray-scale value of each pixel in described pre-service outside drawing picture, by the gray-scale value of pixel maximum for gray-scale value air light value as a whole with described image-preprocessing device 2;
Atmospheric scattering light value obtains subset, be connected respectively with described image-preprocessing device 2 and described haze Concentration Testing subset, to each pixel of described pre-service outside drawing picture, extract its R, G, in B tri-Color Channel pixel value, minimum value is as target pixel value, use and keep the Gaussian filter EPGF (edge-preserving gaussian filter) at edge to carry out filtering process to obtain filtered target pixel value to described target pixel value, target pixel value is deducted filtered target pixel value to obtain object pixel difference, EPGF is used to carry out filtering process to obtain filtered target pixel value difference to object pixel difference, filtered target pixel value is deducted filtered target pixel value difference and remove reference value to obtain haze, haze is removed intensity and be multiplied by haze removal reference value to obtain haze removal threshold value, get haze and remove minimum value in threshold value and target pixel value as comparison reference, get the atmospheric scattering light value of the maximal value in comparison reference and 0 as each pixel,
Medium transmission rate obtains subset, obtain subset and described atmospheric scattering light value with described overall air light value to obtain subset and be connected respectively, the atmospheric scattering light value of each pixel is removed value divided by overall air light value to obtain, deducts 1 described except value is to obtain the medium transmission rate of each pixel;
Sharpening Image Acquisition subset, with described image-preprocessing device 2, described overall air light value obtains subset and is connected respectively with described medium transmission rate acquisition subset, the medium transmission rate of each pixel is deducted to obtain the first difference by 1, described first difference is multiplied by overall air light value to obtain product value, the pixel value of each pixel in described pre-service outside drawing picture is deducted described product value to obtain the second difference, by described second difference divided by the medium transmission rate of each pixel to obtain the sharpening pixel value of each pixel, in described pre-service outside drawing picture, the pixel value of each pixel comprises the R of each pixel in described pre-service outside drawing picture, G, B tri-Color Channel pixel value, correspondingly, the sharpening pixel value of each pixel obtained comprises the R of each pixel, G, B tri-Color Channel sharpening pixel value, the sharpening pixel value composition mist elimination outside drawing picture of all pixels,
Described Freescale IMX6 treatment facility 3 is connected respectively with described mist elimination treatment facility 6 and described static storage device 4, mated one by one with described all kinds of benchmark electric energy meter pattern by described mist elimination outside drawing picture, the type of output matching successful benchmark electric energy meter pattern exports as target electric energy meter type;
Wherein, each benchmark electric energy meter pattern of prestoring of described static storage device 4 is for taking obtained image in advance to each benchmark electric energy meter profile; Described image-preprocessing device 2 also comprises contrast enhancement processing subset and wavelet filtering subset, described contrast enhancement processing subset is connected with described image capture device 1, for carrying out contrast enhancement processing to described electric energy meter outside drawing picture, obtain and strengthen electric energy meter outside drawing picture, described wavelet filtering subset is connected with described contrast enhancement processing subset, based on Haar wavelet filter, wavelet filtering process is carried out to described enhancing electric energy meter outside drawing picture, to obtain described pre-service outside drawing picture.
Wherein, alternatively, described Freescale IMX6 treatment facility 3 also carries out OCR identification to described mist elimination outside drawing picture, to obtain the current reading of described electric energy meter, described image capture device 1 comprises front cover glass, camera lens, filter and image-forming electron unit, described haze Concentration Testing subset, described overall air light value obtains subset, described atmospheric scattering light value obtains subset, described medium transmission rate obtains subset and described sharpening Image Acquisition subset is integrated on one piece of surface-mounted integrated circuit, and adopt different fpga chips respectively to realize, described haze Concentration Testing subset, described overall air light value obtains subset, described atmospheric scattering light value obtains subset, the type selecting of the fpga chip that described medium transmission rate acquisition subset and described sharpening Image Acquisition subset adopt is all the Artix-7 series of Xilinx company.
In addition, haze image can realize the mist elimination haze of image by a series of images treatment facility, to obtain the image of sharpening, improves the visibility of image.These image processing equipments perform different image processing functions respectively, based on the principle that haze is formed, reach the effect removing haze.The sharpening process of haze image all has great using value for dual-use field, and military domain comprises military and national defense, remote sensing navigation etc., and civil area comprises road monitoring, target following and automatic Pilot etc.
The process that haze image is formed can be described by atmospheric attenuation process, relation between haze image and real image and sharpening image can be stated by the medium transmission rate of overall air light value and each pixel, namely when known haze image, according to the medium transmission rate of overall air light value with each pixel, sharpening image can be solved.
There are some effective and through verifying means in the solving of medium transmission rate for overall air light value and each pixel, such as, for the medium transmission rate of each pixel, need the atmospheric scattering light value obtaining overall air light value and each pixel, and the atmospheric scattering light value of each pixel can obtain carrying out the Gaussian smoothing filter at twice maintenance edge to the pixel value of each pixel in haze image, therebetween, the intensity of haze removal is adjustable; And the acquisition pattern of overall air light value has two kinds, a kind of mode is, black channel by obtaining haze image (namely makes the black channel value of some pixels very low in haze image, black channel is R, G, one in B tri-Color Channel), in haze image, obtain by finding the maximum pixel of gray-scale value in multiple pixels that searching black channel pixel value is bigger than normal, be about to the gray-scale value air light value as a whole of that search out, that gray-scale value is maximum pixel, participate in the sharpening process of each pixel in haze image; In addition, overall air light value is also by obtaining with under type: the gray-scale value calculating each pixel in haze image, by the gray-scale value of pixel maximum for gray-scale value air light value as a whole.
Relation between concrete haze image and real image and sharpening image, and the relation between parameters can see above content.
By the discussion to haze image formation basic theory, build the relation between haze image and sharpening image, by this relation of multiple Parametric Representation, subsequently by the multiple parameter values that obtain and haze image and the higher image of reducible acquisition sharpness, some statistical means and empirical means have been used in acquisition due to parameter, therefore the image that described sharpness is higher can not be equal to real image completely, but there is the mist elimination haze effect of certain degree, for the every field operation under haze weather provides effective guarantee.
In addition, FPGA (Field-Programmable Gate Array), i.e. field programmable gate array, he is the product further developed on the basis of the programming devices such as PAL, GAL, CPLD.He occurs as a kind of semi-custom circuit in special IC (ASIC) field, has both solved the deficiency of custom circuit, overcomes again the shortcoming that original programming device gate circuit number is limited.
With the circuit design that hardware description language (Verilog or VHDL) completes, can through simple comprehensive and layout, being burned onto fast on FPGA and testing, is the technology main flow of modern IC designs checking.These can be edited element and can be used to realize some basic logic gates (such as AND, OR, XOR, NOT) or more more complex combination function such as demoder or mathematical equation.
Inside most FPGA, in these editable elements, also comprise memory cell such as trigger (Flip-flop) or other more complete block of memory.System designer can be coupled together the logical block of FPGA inside by editable connection as required, just looks like that a breadboard has been placed in a chip.One dispatch from the factory after the logical block of finished product FPGA can change according to deviser with being connected, so FPGA can complete required logic function.
Adopt the electric energy meter model detection system of view-based access control model identification of the present invention, for existing electric energy meter identification system or too rely on artificial or automaticity is not high and technical matters that is that be disturbed under foggy days, the automatical and efficient identification to electric energy meter type is realized by multiple image acquisition targetedly or image processing section, meanwhile, the interference that under overcoming foggy days, electric energy meter type identification brought of the use of high-precision mist elimination equipment.
Be understandable that, although the present invention with preferred embodiment disclose as above, but above-described embodiment and be not used to limit the present invention.For any those of ordinary skill in the art, do not departing under technical solution of the present invention ambit, the technology contents of above-mentioned announcement all can be utilized to make many possible variations and modification to technical solution of the present invention, or be revised as the Equivalent embodiments of equivalent variations.Therefore, every content not departing from technical solution of the present invention, according to technical spirit of the present invention to any simple modification made for any of the above embodiments, equivalent variations and modification, all still belongs in the scope of technical solution of the present invention protection.
Claims (6)
1. the electric energy meter model detection system of a view-based access control model identification, it is characterized in that, described detection system comprises image capture device, image-preprocessing device, Freescale IMX6 treatment facility and static storage device, described image capture device is used for electric energy meter shooting to obtain electric energy meter outside drawing picture, described static storage device has prestored all kinds of benchmark electric energy meter pattern, described image-preprocessing device is connected with described image capture device, pre-service is carried out to export pre-service outside drawing picture to described electric energy meter outside drawing picture, described Freescale IMX6 treatment facility is connected respectively with described image-preprocessing device and described static storage device, based on electric energy meter type corresponding to pre-service outside drawing picture described in all kinds of benchmark electric energy meter pattern identification to export as target electric energy meter type.
2. the electric energy meter model detection system of view-based access control model identification as claimed in claim 1, it is characterized in that, described detection system also comprises:
Positioning equipment, is connected with described Freescale IMX6 treatment facility, for locating in real time described detection system, and exports current location data to described Freescale IMX6 treatment facility;
Wireless Telecom Equipment, is connected with described Freescale IMX6 treatment facility, for described target electric energy meter type and described current location data being packed, is exported the packet of packing and obtaining by wireless communication link;
SD card, is connected with described Freescale IMX6 treatment facility, for target electric energy meter type described in real-time storage and described current location data;
Power supply, comprise solar powered device, accumulator, change-over switch and electric pressure converter, described change-over switch is connected respectively with described solar powered device and described accumulator, determine whether be switched to described solar powered device to be powered by described solar powered device according to accumulator dump energy, described electric pressure converter is connected with described change-over switch, with the 5V voltage transitions will inputted by change-over switch for 3.3V voltage;
LCDs, is connected with described Freescale IMX6 treatment facility, for showing described target electric energy meter type and described current location data in real time;
Mist elimination treatment facility, between described image-preprocessing device and described Freescale IMX6 treatment facility, for receiving described pre-service outside drawing picture, mist elimination process is carried out to obtain mist elimination outside drawing picture to described pre-service outside drawing picture, described mist elimination outside drawing picture is inputted described Freescale IMX6 treatment facility to carry out electric energy meter type identification to obtain target electric energy meter type;
Described mist elimination treatment facility comprises:
Haze Concentration Testing subset, is arranged in air, for detecting the haze concentration of electric energy meter position in real time, and removes intensity according to haze concentration determination haze, and described haze removes intensity value between 0 to 1;
Overall air light value obtains subset, is connected to obtain described pre-service outside drawing picture, calculates the gray-scale value of each pixel in described pre-service outside drawing picture, by the gray-scale value of pixel maximum for gray-scale value air light value as a whole with described image-preprocessing device;
Atmospheric scattering light value obtains subset, be connected respectively with described image-preprocessing device and described haze Concentration Testing subset, to each pixel of described pre-service outside drawing picture, extract its R, G, in B tri-Color Channel pixel value, minimum value is as target pixel value, use and keep the Gaussian filter EPGF at edge to carry out filtering process to obtain filtered target pixel value to described target pixel value, target pixel value is deducted filtered target pixel value to obtain object pixel difference, EPGF is used to carry out filtering process to obtain filtered target pixel value difference to object pixel difference, filtered target pixel value is deducted filtered target pixel value difference and remove reference value to obtain haze, haze is removed intensity and be multiplied by haze removal reference value to obtain haze removal threshold value, get haze and remove minimum value in threshold value and target pixel value as comparison reference, get the atmospheric scattering light value of the maximal value in comparison reference and 0 as each pixel,
Medium transmission rate obtains subset, obtain subset and described atmospheric scattering light value with described overall air light value to obtain subset and be connected respectively, the atmospheric scattering light value of each pixel is removed value divided by overall air light value to obtain, deducts 1 described except value is to obtain the medium transmission rate of each pixel;
Sharpening Image Acquisition subset, with described image-preprocessing device, described overall air light value obtains subset and is connected respectively with described medium transmission rate acquisition subset, the medium transmission rate of each pixel is deducted to obtain the first difference by 1, described first difference is multiplied by overall air light value to obtain product value, the pixel value of each pixel in described pre-service outside drawing picture is deducted described product value to obtain the second difference, by described second difference divided by the medium transmission rate of each pixel to obtain the sharpening pixel value of each pixel, in described pre-service outside drawing picture, the pixel value of each pixel comprises the R of each pixel in described pre-service outside drawing picture, G, B tri-Color Channel pixel value, correspondingly, the sharpening pixel value of each pixel obtained comprises the R of each pixel, G, B tri-Color Channel sharpening pixel value, the sharpening pixel value composition mist elimination outside drawing picture of all pixels,
Described Freescale IMX6 treatment facility is connected respectively with described mist elimination treatment facility and described static storage device, mated one by one with described all kinds of benchmark electric energy meter pattern by described mist elimination outside drawing picture, the type of output matching successful benchmark electric energy meter pattern exports as target electric energy meter type;
Wherein, each benchmark electric energy meter pattern of prestoring of described static storage device is for taking obtained image in advance to each benchmark electric energy meter profile;
Wherein, described image-preprocessing device also comprises contrast enhancement processing subset and wavelet filtering subset, described contrast enhancement processing subset is connected with described image capture device, for carrying out contrast enhancement processing to described electric energy meter outside drawing picture, obtain and strengthen electric energy meter outside drawing picture, described wavelet filtering subset is connected with described contrast enhancement processing subset, based on Haar wavelet filter, wavelet filtering process is carried out to described enhancing electric energy meter outside drawing picture, to obtain described pre-service outside drawing picture.
3. the electric energy meter model detection system of view-based access control model identification as claimed in claim 2, is characterized in that:
Described Freescale IMX6 treatment facility also carries out OCR identification to described mist elimination outside drawing picture, to obtain the current reading of described electric energy meter.
4. the electric energy meter model detection system of view-based access control model identification as claimed in claim 2, is characterized in that:
Described image capture device comprises front cover glass, camera lens, filter and image-forming electron unit.
5. the electric energy meter model detection system of view-based access control model identification as claimed in claim 2, is characterized in that:
Described haze Concentration Testing subset, described overall air light value obtain subset, described atmospheric scattering light value obtains subset, described medium transmission rate obtains subset and described sharpening Image Acquisition subset is integrated on one piece of surface-mounted integrated circuit, and adopt different fpga chips respectively to realize.
6. the electric energy meter model detection system of view-based access control model identification as claimed in claim 5, is characterized in that:
The type selecting of the fpga chip that described haze Concentration Testing subset, described overall air light value acquisition subset, described atmospheric scattering light value acquisition subset, described medium transmission rate acquisition subset and described sharpening Image Acquisition subset adopt is all the Artix-7 series of Xilinx company.
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