CN111401381A - Digital monitoring system and monitoring method for slow door imaging recognition instrument - Google Patents
Digital monitoring system and monitoring method for slow door imaging recognition instrument Download PDFInfo
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- CN111401381A CN111401381A CN202010226255.5A CN202010226255A CN111401381A CN 111401381 A CN111401381 A CN 111401381A CN 202010226255 A CN202010226255 A CN 202010226255A CN 111401381 A CN111401381 A CN 111401381A
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- 238000003384 imaging method Methods 0.000 title claims abstract description 50
- 238000012544 monitoring process Methods 0.000 title claims abstract description 21
- 238000000034 method Methods 0.000 title claims description 17
- 238000013500 data storage Methods 0.000 claims abstract description 23
- 238000009499 grossing Methods 0.000 claims description 4
- 238000010586 diagram Methods 0.000 description 6
- 230000008054 signal transmission Effects 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 230000033001 locomotion Effects 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
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- 238000006243 chemical reaction Methods 0.000 description 1
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
- G06V30/00—Character recognition; Recognising digital ink; Document-oriented image-based pattern recognition
- G06V30/10—Character recognition
- G06V30/14—Image acquisition
- G06V30/148—Segmentation of character regions
- G06V30/153—Segmentation of character regions using recognition of characters or words
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
- G06V10/00—Arrangements for image or video recognition or understanding
- G06V10/10—Image acquisition
- G06V10/12—Details of acquisition arrangements; Constructional details thereof
- G06V10/14—Optical characteristics of the device performing the acquisition or on the illumination arrangements
- G06V10/141—Control of illumination
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
- G06V10/00—Arrangements for image or video recognition or understanding
- G06V10/20—Image preprocessing
- G06V10/30—Noise filtering
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
- G06V10/00—Arrangements for image or video recognition or understanding
- G06V10/40—Extraction of image or video features
- G06V10/56—Extraction of image or video features relating to colour
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/70—Circuitry for compensating brightness variation in the scene
- H04N23/73—Circuitry for compensating brightness variation in the scene by influencing the exposure time
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/70—Circuitry for compensating brightness variation in the scene
- H04N23/74—Circuitry for compensating brightness variation in the scene by influencing the scene brightness using illuminating means
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/80—Camera processing pipelines; Components thereof
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/18—Closed-circuit television [CCTV] systems, i.e. systems in which the video signal is not broadcast
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
- G06V2201/00—Indexing scheme relating to image or video recognition or understanding
- G06V2201/02—Recognising information on displays, dials, clocks
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
- G06V30/00—Character recognition; Recognising digital ink; Document-oriented image-based pattern recognition
- G06V30/10—Character recognition
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Abstract
The invention relates to the field of instrument and instrument identification and monitoring, in particular to a digital monitoring system of a slow door imaging identification instrument, which comprises an imaging device, an imaging control unit, a data storage unit, a character identification unit, a comparison unit, a control unit and a wireless signal sending unit, wherein the imaging device comprises a shell, a digital camera and an L ED lamp, and the shell covers an instrument measuring device to form a closed space with the shell and the instrument measuring device.
Description
Technical Field
The invention relates to the field of instrument and instrument identification and monitoring, in particular to a digital monitoring system and a monitoring method for a slow door imaging identification instrument.
Background
At present, old mechanical electric meters or water meters are still used in part of urban areas, and need personnel to read the accumulation meters in person, so that the problems that a large amount of manpower is needed, the labor expenditure is high, and factors such as absence of a master or refusal of meter reading due to errors of meter reading personnel exist. The old mechanical electric meter or water meter displays the reading through the rolling number of the display window, and the known solution is to image the display window periodically through an image recognition device and then recognize and read the captured image, thus completing the meter reading. However, in the imaging process, due to the rotation of the digital shaft, a part containing two characters is sometimes imaged, and in this case, the characters in the image are not recognized, so that the timeliness of data updating of the old mechanical electric meter or water meter is poor, and the data statistics cannot be well completed.
Disclosure of Invention
Accordingly, the present invention has been made in view of the above problems, and it is an object of the present invention to provide a digital monitoring system for a slow door imaging recognition instrument, which can accurately recognize character information by recognizing brightness.
Slow door imaging discernment instrument digital monitoring system, it includes: an image forming apparatus, an image forming control unit,
The device comprises a data storage unit, a character recognition unit, a comparison unit, a control unit and a wireless signal sending unit;
the image forming apparatus includes: a housing, a digital camera; the housing covers the meter measuring device, the number
The camera is a slow shutter shooting camera, the digital camera is installed on the shell, and the L ED lamp is installed on the shell;
the imaging control unit controls the digital camera to enable the digital camera to periodically image the display window;
the data storage unit is used for storing the image data sent by the camera control unit and storing character recognition
Character information of unit identification;
the character recognition unit includes: the device comprises an image processing unit, a color identification unit and a digital identification unit; the above-mentioned
The image processing unit firstly carries out smoothing processing on the image, then carries out gray processing on the image, and enables the image to only contain three color values of black, white and gray;
the number recognition unit recognizes the characters by adopting a template matching method;
the comparing unit stores the character information of the number recognition unit in the data storage unit
Comparing the historical character information, when the two groups of characters are different, transmitting the two groups of characters to a wireless signal generating device, sending headquarters through the wireless signal generating device, deleting the historical character information by a data storage unit, and storing new characters;
the control unit is used for controlling the imaging control unit, the data storage unit, the character recognition unit and the comparison unit
And operation of the element and wireless signal sending unit.
The digital camera image through the slow gate, can obtain the complete character when the character moves first and then images, thus has reduced the probability of appearing the incomplete character, and then the image processing unit makes a noise removal to the digital camera in the course of imaging the smear that the character takes place the motion and produces, obtain the historical complete character, the digital identification unit uses the template matching method to discern the character, and increase a numerical value to the historical character, discern the character accurately, and then pass the comparison unit, compare the successive character information, if two groups of character information are different, the wireless transmission is to the headquarter, thus avoid the character under the situation that can't be discerned, cause the data to be unable to be updated in time.
Drawings
FIG. 1 is a schematic diagram of the overall system of the present invention.
FIG. 2 is a schematic view of an image forming apparatus according to the present invention.
FIG. 3 is a schematic view of the measuring device of the cover instrument of the imaging device of the present invention.
Fig. 4 is a schematic diagram of the imaging device of the present invention after imaging.
FIG. 5 is a schematic diagram of a character recognition unit system according to the present invention.
FIG. 6 is a schematic diagram of the operation of the color identification unit according to the present invention.
As shown in the figure, the device comprises 1-an imaging device, 2-an imaging control unit, 3-a data storage unit, 4-a character recognition unit, 5-a comparison unit, 6-a control unit, 7-a wireless signal transmission unit, 8-a meter measuring device, 11-a shell, 12-a digital camera, 13-L ED lamps, 41-an image processing unit, 42-a color recognition unit, 43-a digital conversion unit, 81-a display window and 421-a recognition frame.
Detailed Description
The present invention is further illustrated in the following description with reference to specific embodiments and the accompanying drawings, wherein the details are set forth in order to provide a thorough understanding of the present invention, but it is apparent that the present invention can be embodied in many other forms different from the description herein, and it will be readily appreciated by those skilled in the art that the present invention can be embodied in many different forms without departing from the spirit and scope of the invention.
Example one
As shown in fig. 1, the digital monitoring system for slow door imaging recognition instrument includes: the imaging device 1, the imaging control unit 2, the data storage unit 3, the character recognition unit 4, the comparison unit 5, the control unit 6, the wireless signal transmission unit 7;
as shown in fig. 2 to 3, the imaging apparatus 1 includes a housing 11, a digital camera 12, an L ED lamp 13;
the shell 11 covers the instrument measuring device 8, so that the shell 11 and the instrument measuring device 8 form a closed space to protect the instrument measuring device 8 from the influence of the external environment;
the digital camera 12 is mounted on the housing 11, the digital camera 12 images the display window 81 of the instrument measuring device 8, so as to obtain characters in the display window 81, wherein the digital camera 12 is a slow shutter shooting camera, and aims to reduce the probability that the characters move and display incomplete characters when the digital camera 12 images, for example, the character moving speed is "1" second, and the digital camera imaging time is "0.4" second, when the digital camera 12 images and the characters at the same time or the characters move first and then image, the completely displayed characters are obtained, the characters move during the imaging process of the digital camera 12, and the characters have smear;
as shown in fig. 4, in the diagram a, the digital camera 12 still performs imaging after the movement of the character is finished, so that the character in the image after the imaging is finished can be completely displayed, in the diagram b, because the character moves in the imaging process of the digital camera 12, when the character does not move, the character reflects light at a fixed position, the digital camera 12 continuously receives the light at the position, when the character moves, the stay time in different areas is short, the digital camera 12 receives less light in different areas, so that the brightness when the character does not move is higher than the brightness after the character moves, and the character continues to move after the imaging is finished, so that a smear is formed;
the L ED lamp 13 is installed on the shell 11, when the digital camera 12 images the instrument measuring device 9, the L ED lamp 13 is lighted to improve the brightness of the imaging;
the imaging control unit 2 controls the digital camera 12, so that the digital camera 12 periodically images the display window 91 (for example, performs imaging at an interval of one minute), and receives post-imaging data, and at the same time, the camera control unit 2 controls L on/off of the ED lamp 13;
the data storage unit 3 is used for storing the image data sent by the camera control unit 2 and storing the character information identified by the character identification unit 4;
as shown in fig. 5, the character recognition unit 4 includes: an image processing unit 41, a color recognition unit 42, a number recognition unit 43;
the image processing unit 41 firstly performs smoothing processing on the image, and then performs gray processing on the image, so that the image only contains three color values of black, white and gray, after the color identification unit 42 identifies the image, the image processing unit 41 determines whether to reduce the brightness of the image and performs reduction/expansion processing on the image;
as shown in fig. 6, the color recognition unit 42 selects the frame of the middle region of the display window 81 in the image through the recognition frame 421, the color recognition unit 42 recognizes whether gray color values other than black and white color values are included or not through RGB values, if not, the digital recognition unit 43 recognizes characters in the image, if so, the image processing unit 41 reduces the brightness of the image, denoises the smear with lower brightness, further removes noise in the image after the image is reduced/expanded, and after the digital recognition unit 43 recognizes the characters in the image, adds a numerical value to the recognized character information, thereby obtaining accurate character information;
the number recognition unit 43 recognizes the characters by a template matching method;
the comparing unit 5 compares the character information of the digital recognition unit 43 with the historical character information in the data storage unit 3, when two groups of characters are different, the two groups of characters are transmitted to the wireless signal generating device 7, then the two groups of characters are sent to the headquarter through the wireless signal generating device 7, and the data storage unit 3 deletes the historical character information and stores new characters;
the control unit 6 is used for controlling the operations of the imaging control unit 2, the data storage unit 3, the character recognition unit 4, the comparison unit 5 and the wireless signal transmission unit 7.
Preferably, as an implementation mode, the L ED lamp 13 has weak brightness, and since the digital camera 12 images through a slow shutter, the image is exposed excessively due to the strong brightness, so that the character recognition unit 4 cannot recognize the image.
Example two
The digital monitoring method of the slow door imaging recognition instrument adopts the digital monitoring system of the slow door imaging recognition instrument according to the embodiment one, and the specific monitoring method is as follows:
① the imaging control unit 2 controls the digital camera 12 to image the display window 91 slowly, and then sends the imaging data to the data storage unit 3 for storage;
② the image processing unit 41 firstly smoothes the image and then carries out gray processing on the image, so that the image only contains three color values of black, white and gray;
③ the color recognition unit 42 recognizes whether the image contains a gray color value by the recognition box 421, and if not, the number recognition unit 43 recognizes the character by the template matching method;
④ color recognition unit 42 recognizes the image contains gray value, image processing unit 41 reduces the image brightness, and de-noizes the shadow after the image is reduced/expanded, so as to obtain the complete character, digital recognition unit 43 recognizes the character by template matching method, and adds one digit value to the recognized character;
⑤ the comparing unit 5 compares the character information of the number identifying unit 43 with the historical character information in the data storage unit 3, when two groups of characters are different, the two groups of characters are transmitted to the wireless signal generating device 7, and then the wireless signal generating device 7 sends the headquarters, and deletes the historical character information in the previous data storage unit 5, and stores the new character information.
Claims (5)
1. Slow door imaging discernment instrument digital monitoring system, it includes: the device comprises an imaging device (1), an imaging control unit (2), a data storage unit (3), a character recognition unit (4), a comparison unit (5), a control unit (6) and a wireless signal sending unit (7);
the imaging device (1) comprises a shell (11) and a digital camera (12), wherein the shell (11) covers an instrument measuring device (8), the digital camera (12) is a slow shutter shooting camera, the digital camera (12) is installed on the shell (11), and the L ED lamp (13) is installed on the shell (11);
the imaging control unit (2) controls the digital camera (12) to enable the digital camera (12) to periodically image the display window (91);
the data storage unit (3) is used for storing the image data sent by the camera control unit (2) and storing the character information identified by the character identification unit (4);
the character recognition unit (4) includes: an image processing unit (41), a color recognition unit (42), and a number recognition unit (43); the image processing unit (41) firstly carries out smoothing processing on the image, then carries out gray processing on the image, and enables the image to only contain three color values of black, white and gray, and after the color identification unit (42) identifies the image, the image processing unit (41) determines whether the image brightness is reduced or not and carries out reduction/expansion processing on the image;
the number recognition unit (43) recognizes the characters by adopting a template matching method;
the comparing unit (5) compares the character information of the digital recognition unit (43) with the historical character information in the data storage unit (3), when two groups of characters are different, the two groups of characters are transmitted to the wireless signal generating device (7), then the headquarters are sent through the wireless signal generating device (7), and the data storage unit (3) deletes the historical character information and stores new characters;
the control unit (6) is used for controlling the operations of the imaging control unit (2), the data storage unit (3), the character recognition unit (4), the comparison unit (5) and the wireless signal sending unit (7).
2. The digital monitoring system of slow door imaging recognition instrument of claim 1, wherein said imaging device further comprises L ED lamp (13), said L ED lamp (13) being mounted on the housing (11).
3. The slow door imaging identification meter digital monitoring system of claim 2, wherein said L ED lights (13) are of low intensity.
4. The digital monitoring system of the slow door imaging recognition instrument of claim 3, wherein the imaging control unit (2) controls L ED lamps to be turned on and off.
5. The slow door imaging identification instrument digital monitoring system according to any one of claims 1-4, characterized in that the monitoring method of the system is as follows:
① the control unit (2) controls the digital camera (12) to image the display window (91) slowly, and then sends the imaging data to the data storage unit (3) for storage;
② an image processing unit (41) firstly carries out smoothing processing on the image, and then carries out gray processing on the image, so that the image only comprises three color values of black, white and gray;
an ③ color recognition unit (42) recognizes whether the image contains a gray color value or not through a recognition frame (421), and if not, a number recognition unit (43) recognizes the character through a template matching method;
④ color recognition unit (42) recognizes the image contains gray value, image processing unit (41) reduces the image brightness, and de-noizes the shadow after the image is reduced/expanded, thus obtaining the complete character, digital recognition unit (43) recognizes the character by template matching method, and adds a digit value to the recognized character;
⑤ the comparing unit (5) compares the character information of the number identifying unit (43) with the historical character information in the data storage unit (3), when two groups of characters are different, the two groups of characters are transmitted to the wireless signal generating device (7), the wireless signal generating device (7) sends the headquarters, and the historical character information in the previous data storage unit (5) is deleted, and the new character information is stored.
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| CN202010226255.5A CN111401381A (en) | 2020-03-27 | 2020-03-27 | Digital monitoring system and monitoring method for slow door imaging recognition instrument |
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| CN202010226255.5A CN111401381A (en) | 2020-03-27 | 2020-03-27 | Digital monitoring system and monitoring method for slow door imaging recognition instrument |
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| CN111935464A (en) * | 2020-10-19 | 2020-11-13 | 南京擅水科技有限公司 | Brightness recognition instrument monitoring device and method |
| CN112016549A (en) * | 2020-10-19 | 2020-12-01 | 南昌冠东科技有限公司 | Instrument and meter discernment monitoring device |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111935464A (en) * | 2020-10-19 | 2020-11-13 | 南京擅水科技有限公司 | Brightness recognition instrument monitoring device and method |
| CN112016549A (en) * | 2020-10-19 | 2020-12-01 | 南昌冠东科技有限公司 | Instrument and meter discernment monitoring device |
| CN111935464B (en) * | 2020-10-19 | 2021-03-12 | 太仓市昊博技术服务有限公司 | Brightness recognition instrument monitoring device and method |
| CN112016549B (en) * | 2020-10-19 | 2021-07-30 | 北京京仪北方仪器仪表有限公司 | Instrument and meter discernment monitoring device |
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Application publication date: 20200710 |