CN111461123A - Color recognition instrument monitoring device - Google Patents
Color recognition instrument monitoring device Download PDFInfo
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- CN111461123A CN111461123A CN202010552836.8A CN202010552836A CN111461123A CN 111461123 A CN111461123 A CN 111461123A CN 202010552836 A CN202010552836 A CN 202010552836A CN 111461123 A CN111461123 A CN 111461123A
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
- G06V20/00—Scenes; Scene-specific elements
- G06V20/60—Type of objects
- G06V20/62—Text, e.g. of license plates, overlay texts or captions on TV images
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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
Abstract
Color discernment instrument monitoring device includes: the device comprises an imaging device, an imaging control unit, a data storage unit, a character recognition unit, a comparison unit, a control unit and a wireless signal sending unit; the imaging control unit controls the imaging device to alternately light up through the flash lamps with different colors to image the target instrument and store the images into the data storage unit, then the character recognition unit superposes two adjacent images to obtain a color value of which the overlapped part changes, the comparison unit obtains whether the numerical value in the target instrument changes or not and identifies a specific number, and finally the result is sent to the server through the wireless signal sending unit.
Description
Technical Field
The invention relates to the technical field of intelligent reading identification of instruments, in particular to a device for identifying an instrument through image analysis.
Background
At present, the instrument data acquisition work of many factories or communities is still finished by manual meter reading, such as boiler temperature, reservoir water level, air temperature and air pressure, resident water meter and electricity meters, a large amount of manpower is consumed by utilizing the manual meter reading mode, the problem of inaccurate acquired numerical value caused by errors of meter reading personnel still exists, the effect of real-time acquisition cannot be achieved, even the situations that a house owner cannot read the meter in the resident community, and how to realize intelligent remote real-time meter reading is a technical problem to be solved.
Disclosure of Invention
The present invention has been made in view of the above problems, and it is an object of the present invention to provide a color recognition instrument monitoring device that determines character information by recognizing color values.
Color discernment instrument monitoring device includes: the device comprises an imaging device, an imaging control unit, a data storage unit, a character recognition unit, a comparison unit, a control unit and a wireless signal sending unit.
The imaging device comprises a shell, a digital camera and two flash lamps with different colors, and the digital camera is used for periodically and continuously shooting the target instrument display window in a closed environment wrapped by the shell.
The two flash lamps with different colors are arranged on the digital camera and alternately lightened up in turn when the digital camera images every time, so that illumination is provided for the digital camera during imaging.
The imaging control unit controls a digital camera in the imaging device to periodically image a target instrument and receive imaged picture data, and simultaneously controls the two flash lamps to alternately light up when the digital camera images the target instrument, so that the pictures imaged in two adjacent front and back times are in two different colors.
The data storage unit is used for storing the image data sent by the imaging control unit and the character information identified by the character identification unit.
The character recognition unit includes: the device comprises an image processing unit, a color identification unit and an image superposition unit.
The image processing unit performs uniform processing such as smoothing, brightness reduction, denoising, reduction or expansion on the image stored in the data storage unit.
The color identification unit is used for identifying the image stored in the data storage unit.
The color recognition unit firstly judges whether the characters in the image are completely displayed or not, if the characters are incomplete, the data storage unit deletes the image, and the imaging device is controlled by the imaging control unit to image the target instrument display window again until the obtained characters are complete characters.
Then the image superposition unit extracts the current and previous images in the data storage unit to carry out positive film bottom superposition processing, and identifies the part of the CMYK color value deepening after the superposition of the two images.
The comparison unit compares the character information processed by the character recognition unit with a comparison template pre-stored in the data storage unit to obtain which two digits the character information of the character recognition unit is superposed, and then transmits the result to the wireless signal transmission unit and sends the result to the server through the wireless signal transmission unit.
The control unit is used for controlling the operations of the imaging control unit, the data storage unit, the character recognition unit, the comparison unit and the wireless signal sending unit.
Has the advantages that: the invention enables the front and back obtained images to obtain the presentation of two different colors by controlling the flash lamps with two colors, then carries out optimization processing and recognition on the images by the character recognition unit, when a complete character is recognized, two adjacent complete images are overlapped by the image overlapping unit, then the positions of a plurality of overlapped colors are recognized by the color recognition unit, thereby recognizing character information, and a comparison unit is utilized to compare whether the front and back groups of characters are the same or not, and the result is sent to a server by a wireless signal generation device.
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 diagram of a character recognition unit system according to the present invention.
FIG. 4 is a first schematic view of a color identification unit according to the present invention.
FIG. 5 is a schematic diagram of an operation of the image registration unit according to the present invention.
FIG. 6 is a schematic diagram of a second operation mode of the color identification unit according to the present invention.
As shown in the figure: the system comprises an imaging device 1, a shell 11, a digital camera 12, a flash lamp I13, a flash lamp II 14, an imaging control unit 2, a data storage unit 3, a character recognition unit 4, an image processing unit 41, a color recognition unit 42, a reference line I421, a reference line II 422, an image superposition unit 43, a comparison unit 5, a control unit 6, a wireless signal sending unit 7, a server 8, a target instrument 9 and a display window 91.
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.
As shown in fig. 1, the color recognition meter monitoring apparatus 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, the image forming apparatus 1 includes: a housing 11, a digital camera 12, a first flash 13, and a second flash 14.
The display window 91 of the target instrument 9 is wrapped by the shell 11, so that the shell 11 and the target instrument 9 form a closed environment, on one hand, the display window 91 of the target instrument 9 is prevented from being influenced by external light, and on the other hand, sundries are prevented from being attached to the display window 91 of the target instrument 9.
The digital camera 12 is embedded on the housing 11, and a lens of the digital camera 12 extends into the housing 11 and faces the display window 91 of the target instrument 9.
The first flash 13 and the second flash 14 are disposed on the digital camera 12 and located in the housing 11, and the colors of the two lights are different, for example, red and green lights are used, the first flash 13 irradiates red light, and the second flash 14 irradiates green light, wherein the first flash 13 and the second flash 14 alternately light up during each imaging of the digital camera 12, so as to provide illumination for the digital camera 12 during imaging.
The imaging control unit 2 controls the digital camera 12 in the imaging device 1, so that the digital camera 12 periodically images the target meter 9 (for example, performs imaging at one minute intervals), and receives the imaged data, and the imaging control unit 2 controls the flash lamp one 13 and the flash lamp two 14 to be alternately turned on when the digital camera 12 images the target meter 9, so that the two different colors are obtained by the previous and subsequent imaging.
The color of the exterior and interior numerical values and the background color are generally two colors with large contrast difference, such as white characters on black or black characters on white, and are described below by white characters on black.
Because the background of the character is black and the character is white, the white reflection rate is far greater than black, and the red and green characters with different colors are respectively obtained after two-period imaging through the reflection of red light and green light.
The data storage unit 3 is configured to store image data sent from the imaging control unit 2, the image information including the reading display window 91 and characters, and also store character information recognized by the character recognition unit 4.
As shown in fig. 3, the character recognition unit 4 includes: an image processing unit 41, a color recognition unit 42, an image superimposition unit 43.
The image processing unit 41 performs smoothing processing on the image stored in the data storage unit 3, then reduces the image brightness, performs denoising on the light reflected by the character black background, and finally performs reduction or expansion processing on the image to delete the remaining noise part.
The color identifying unit 42 is used to identify the image stored in the data storage unit 3.
As shown in fig. 4, the color identification unit 42 adds a reference line one 421 to each of the upper and lower sides of the character in the image, and the two reference lines one 421 respectively form two color identification areas with the upper and lower frames of the display window 91. When the character is completely displayed between the two reference lines one 421, the color recognition unit 42 determines that the color read in the color recognition area is black, and determines that the character can be recognized, the image is sent to the image superposition unit 43; if the character is imaged while changing, for example, if the value of the target meter 9 is just changing from "1" to "2" while imaging, and the character in the image is partially displayed in the upper and lower two color recognition areas, the color recognition unit 42 recognizes other colors than black in the color recognition areas, and thus determines that the character is not completely displayed and accurate character recognition cannot be performed, the data storage unit 3 deletes the image.
The image superimposing unit 43 extracts the current and previous image characters in the data storage unit 3 to perform the superimposing process.
As shown in fig. 5, the color recognition unit 42 performs positive film lamination (checking the color information of the corresponding pixels, and combining the primary color with the mixed color, so that the result color is always a darker color) on the superimposed image characters, and since the color of the previous image character is different from the color of the character transmitted by the color recognition unit 42, the overlapped part of the two groups of characters shows deep red and CMYK color values greater than the red and green color values in the original image after the positive film lamination of the red and green; since the numerical value varies from "0" to "9", the number of superimposed results is limited.
As shown in fig. 6, the color recognition unit 42 divides the character into a plurality of regions uniformly by using a plurality of reference lines 422 in the horizontal and vertical directions, recognizes the magenta colors of the plurality of regions, and recognizes the combination information including two characters by the position where the magenta color appears in the plurality of regions.
The comparing unit 5 compares the character information of the character recognizing unit 4 with a comparison template (i.e. a set of results obtained by superimposing all adjacent digits) pre-stored in the data storage unit 3 to obtain which two digits the character information of the character recognizing unit 4 is superimposed on, so as to obtain whether the numerical value is changed or not, and then transmits the result to the wireless signal transmitting unit 7, and then the result is transmitted to the server 8 through the wireless signal transmitting unit 7.
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.
In an embodiment, the colors of the first flash lamp 13 and the second flash lamp 14 are two colors separated by 120 degrees to 180 degrees on the color circle, that is, the first flash lamp 13 and the second flash lamp 14 may also be lamps of other colors, preferably two colors with longer hue value distances, such as purple and yellow, blue and orange, and the like, and after the two colors are stacked on the front sheet, the two colors will generate a color with a larger difference from the color value before the stacking, so that the color identification unit 42 can identify the stacked part more easily.
The invention comprises the following working steps: s1: the imaging control unit 2 controls the digital camera 12 to image the display window 91, the first flash lamp 13 illuminates first during imaging, the digital camera 12 is controlled again to image the display window 91 by the imaging control unit 2 in the next period, and the second flash lamp 14 illuminates at the moment.
S2: the character recognition unit 4 processes the image in the data storage unit 3, firstly, the image processing unit 41 smoothes the image stored in the data storage unit 3, reduces the brightness of the image, reduces or enlarges the image, and then, the two reference lines one 421 of the color recognition unit 42 determine whether the characters in the image are complete, if so, the complete character image is transmitted to the data storage unit 3, and if not, the data storage unit 3 deletes the image.
S3: the image superimposing unit 43 extracts the nearest adjacent two images in the data storage unit 3 and performs positive film-stacking, and the portion where red and green overlap appears dark red. And identifying the directions of the dark red in the plurality of areas through the plurality of areas formed by the second reference lines 422, thereby identifying the information of the character.
S4: the comparison unit 5 compares the character information of the character recognition unit 4 with a comparison template pre-stored in the data storage unit 3 to obtain which two digits the character information of the character recognition unit 4 is superimposed on, transmits the result to the wireless signal transmission unit 7, and then transmits the result to the server 8 through the wireless signal transmission unit 7.
Claims (2)
1. Color discernment instrument monitoring device 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 method is characterized in that:
the imaging device (1) includes: the device comprises a shell (11), a digital camera (12), a first flash lamp (13) and a second flash lamp (14);
the digital camera (12) is embedded on the shell (11), and a lens of the digital camera (12) extends into the shell (11);
the first flash lamp (13) and the second flash lamp (14) are arranged on the digital camera (12) and are positioned in the shell (11), and the colors of the two flash lamps are different;
the imaging control unit (2) controls the digital camera (12) to periodically image and receive imaged data, and meanwhile, the imaging control unit (2) controls the flash lamp I (13) and the flash lamp II (14) to alternately light up when the digital camera (12) images;
the data storage unit (3) is used for storing the image data sent by the imaging control unit (2) and 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 an image superimposition unit (43);
the image processing unit (41) performs smoothing processing on the image stored in the data storage unit (3), reduces the image brightness, denoises the image background reflected light, and performs reduction or amplification processing on the image;
the color identification unit (42) adds a first reference line (421) to the upper side and the lower side of a character in the image respectively, the two first reference lines (421) and the upper frame and the lower frame of the display window (91) form two color identification areas respectively, and the data storage unit (3) receives the image if the color identification unit (42) identifies that only a single color exists in the two color identification areas; if there is a non-single color, the data storage unit (3) deletes the image;
the image superposition unit (43) extracts two continuous images in the data storage unit (3) to carry out positive film lamination, and identifies the graph with the highest color value through CMYK color values;
the color recognition unit (42) uniformly divides the characters into a plurality of areas by utilizing a plurality of horizontal and vertical reference lines II (422) for the image superposed by the image superposition unit (43);
the comparison unit (5) compares the image information of the character recognition unit (4) with a comparison template pre-stored in the data storage unit (3) to obtain whether the characters in the front image and the rear image are changed or not and change conditions, and transmits the result to the wireless signal sending unit (7);
the wireless signal transmitting unit (7) transmits the received comparison result to a server (8);
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 color identifying meter monitoring device of claim 1, wherein: the colors of the first flash lamp (13) and the second flash lamp (14) are two colors which are separated by 120-180 degrees on a hue circle.
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| CN202010552836.8A CN111461123B (en) | 2020-06-17 | 2020-06-17 | Color recognition instrument monitoring device |
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