CN115257198A - Thermal paper printing identification method and device and thermal printer - Google Patents
Thermal paper printing identification method and device and thermal printer Download PDFInfo
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- CN115257198A CN115257198A CN202210885820.8A CN202210885820A CN115257198A CN 115257198 A CN115257198 A CN 115257198A CN 202210885820 A CN202210885820 A CN 202210885820A CN 115257198 A CN115257198 A CN 115257198A
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- 238000007639 printing Methods 0.000 title claims abstract description 142
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- 238000001514 detection method Methods 0.000 claims description 19
- 238000012549 training Methods 0.000 claims description 8
- 238000007651 thermal printing Methods 0.000 abstract description 8
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- 238000005259 measurement Methods 0.000 description 7
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- 238000012795 verification Methods 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 3
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J11/00—Devices or arrangements of selective printing mechanisms, e.g. ink-jet printers or thermal printers, for supporting or handling copy material in sheet or web form
- B41J11/009—Detecting type of paper, e.g. by automatic reading of a code that is printed on a paper package or on a paper roll or by sensing the grade of translucency of the paper
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
- B41J2/315—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of heat to a heat sensitive printing or impression-transfer material
- B41J2/32—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of heat to a heat sensitive printing or impression-transfer material using thermal heads
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Abstract
The invention discloses a thermal paper printing identification method, a thermal paper printing identification device and a thermal printer, wherein the thermal paper printing identification method comprises the following steps: collecting an image of thermal paper to be printed; identifying the image of the thermal paper and acquiring the characteristic parameters of the thermal paper; searching standard thermal paper matched with the thermal paper in a thermal paper library according to the characteristic parameters of the thermal paper; the thermal paper library stores characteristic data of standard thermal paper with different specifications and models; when the standard thermal paper matched with the thermal paper is found, acquiring the printing parameters of the standard thermal paper; and performing printing setting according to the printing parameters so as to print the thermal paper. Through this application, but the printing of the thermal printing paper of compatible different specifications, the convenience and the precision of printing all obtain improving greatly.
Description
Technical Field
The invention relates to the field of printers, in particular to a method and a device for identifying printing of thermal paper and a thermal printer.
Background
At present, the handheld thermal printing head on the market basically adopts a reflection type or transmission type photoelectric pair scheme for paper detection, and whether the handheld thermal printing head is a reflection type or a transmission type, the handheld thermal printing head can be influenced by superposition of various factors such as structure, detection distance, sensor tolerance, mainboard matching resistance and the like, so that the problems of unstable effect, inconsistent performance of different batches and the like are caused, the consistency of hardware and the structure is generally managed and controlled with high strength, so that the stable effect can be achieved, the cost is high, the debugging difficulty is high, the compatibility of various types of paper is greatly limited, once new specifications of paper appear, the condition of non-support is easy to appear, and the technical limitation is large.
Disclosure of Invention
In order to solve the technical problem, the invention provides a thermal paper printing identification method and device and a thermal printer. Specifically, the technical scheme of the invention is as follows:
in a first aspect, the present application discloses a method for identifying a thermal paper print, comprising:
collecting an image of thermal paper to be printed;
identifying the image of the thermal paper and acquiring the characteristic parameters of the thermal paper;
searching standard thermal paper matched with the thermal paper in a thermal paper library according to the characteristic parameters of the thermal paper; the thermal paper library stores characteristic data of standard thermal paper with different specifications and models;
when standard thermal paper matched with the thermal paper is found, acquiring printing parameters of the standard thermal paper;
and performing printing setting according to the printing parameters so as to print the thermal paper.
In some embodiments, the method for identifying thermal paper printing further includes:
establishing a thermal paper library; the method specifically comprises the following steps:
collecting images of standard thermal sensitive paper with different specifications;
marking the standard thermal paper to obtain characteristic parameters of each standard thermal paper; the characteristic parameters comprise any one or more of paper type, paper size, gap, black mark position, color of preprinted content, position and size of the preprinted content;
determining corresponding printing parameters according to the characteristic parameters of the thermal paper;
and storing the characteristic parameters and the printing parameters of the standard thermal paper with different specifications into a thermal paper library.
In some embodiments, the thermal paper printing identification method further includes:
when the standard thermal paper type matched with the characteristic parameters is not found, judging that the thermal paper is a new thermal paper;
collecting an image of the new thermal paper;
identifying the image of the new thermal paper, and acquiring the characteristic parameters of the new thermal paper;
after the new thermal paper is put into a paper bin, paper feeding learning is carried out, the new thermal paper is detected through a photoelectric sensor, and the characteristic data of the new thermal paper is obtained;
comparing the characteristic parameters of the new thermal paper with the characteristic data of the new thermal paper;
when the comparison is consistent, taking the new thermal paper as new standard thermal paper, and determining the printing parameters of the new standard thermal paper according to the characteristic data of the new thermal paper;
and uploading the characteristic data and the printing parameters of the new standard thermal paper to the thermal paper library.
In some embodiments, an image of the thermal paper is identified, and a characteristic parameter of the thermal paper is acquired; the method specifically comprises the following steps:
identifying characteristic parameters of the thermal paper corresponding to the image of the thermal paper based on machine vision; the characteristic parameters include any one or more of a paper type, a paper size, a black mark position, a gap position, a color and a size of the preprinted content.
In some embodiments, identifying the image of the thermal paper, and acquiring the characteristic parameter of the thermal paper; the method specifically comprises the following steps:
inputting the image of the thermal paper into a pre-trained thermal paper identification model for identification; the thermal paper identification model is trained by adopting a preset number of thermal paper training samples with different specifications, and each training sample comprises an image of the thermal paper and label information for identifying characteristic parameters of the thermal paper;
and identifying and outputting the characteristic parameters of the thermal paper corresponding to the thermal paper image.
In a second aspect, the present application discloses a thermal paper print recognition apparatus comprising:
the image acquisition module is used for acquiring an image of the thermal paper to be printed;
the identification detection module is used for identifying the image of the thermal paper and acquiring the characteristic parameters of the thermal paper;
the searching and matching module is used for searching standard thermal paper matched with the thermal paper in a thermal paper library according to the characteristic parameters of the thermal paper; the thermal paper library stores characteristic data of standard thermal paper with different specifications and models;
the parameter acquisition module is used for acquiring the printing parameters of the standard thermal paper when the standard thermal paper matched with the thermal paper is found;
and the printing setting module is used for performing printing setting according to the printing parameters so as to print the thermal paper.
In some embodiments, the thermal paper print recognition device further includes:
the database establishing module is used for establishing a thermal paper library; the database establishing module specifically comprises:
the sample acquisition submodule is used for acquiring images of standard thermal sensitive paper with different specifications;
the label acquisition module is used for labeling the standard thermal paper to acquire characteristic parameters of each standard thermal paper; the characteristic parameters comprise any one or more of paper type, paper size, gap, black mark position, color of preprinted content, position and size of the preprinted content;
the parameter determining submodule is used for determining corresponding printing parameters according to the characteristic parameters of the thermal paper;
and the storage submodule is used for storing the characteristic parameters and the printing parameters of the standard thermal paper with different specifications to the thermal paper library.
In some embodiments, the thermal paper print recognition device further includes:
the judging module is used for judging that the thermal paper is a new thermal paper when the standard thermal paper type matched with the characteristic parameters is not found;
the image acquisition module is also used for acquiring the image of the new thermal paper;
the identification detection module is also used for identifying the image of the new thermal paper and acquiring the characteristic parameters of the new thermal paper;
the paper feeding learning module is used for carrying out paper feeding learning after the new thermal sensitive paper is placed in a paper bin, detecting the new thermal sensitive paper through a photoelectric sensor and acquiring the characteristic data of the new thermal sensitive paper;
the comparison operation module is used for comparing the characteristic parameters of the new thermal paper with the characteristic data of the new thermal paper; and when the comparison is consistent, the new thermal sensitive paper is used as new standard thermal sensitive paper,
the parameter acquisition module is also used for determining the printing parameters of the new standard thermal paper according to the characteristic data of the new thermal paper;
and the storage updating module is used for uploading the characteristic data and the printing parameters of the new standard thermal paper to the thermal paper library. And uploading to the thermal paper storage.
In some embodiments, the identification detection module specifically comprises:
the machine vision identification submodule identifies the characteristic parameters of the thermal paper corresponding to the image of the thermal paper based on machine vision; the characteristic parameters include any one or more of a paper size, a black mark position or gap position, a color and a size of the preprinted content.
In a third aspect, the application further discloses a thermal printer, wherein any one of the thermal paper printing identification devices is integrated in the thermal printer.
Compared with the prior art, the invention has at least one of the following beneficial effects:
1. the utility model provides a store the standard thermal paper of different specification models in the thermal paper storehouse, before changing printing paper, the image of the thermal paper of waiting to print is gathered to the accessible, and then the characteristic parameter of this thermal paper of waiting to print is detected out in the discernment, then go to match in the thermal paper storehouse according to this characteristic parameter, in case match the standard thermal paper that corresponds, then can acquire corresponding printing parameter, thereby call corresponding printing parameter and set up, so alright make the thermal printer can be compatible with the thermal printing paper of many specifications, the working property is greatly improved.
2. According to the scheme, when the corresponding standard thermal paper is not matched in the thermal paper library, the characteristic parameters of the new thermal paper can be learned in real time, and the characteristic parameters of the new thermal paper are updated in the thermal paper library after paper feeding verification, so that the subsequent thermal printing paper with the specification and model can be directly matched, and the corresponding printing parameters are called for printing setting. The updating scheme of the thermal paper library greatly improves the adaptability of the thermal printer, and the range of the compatible thermal paper is wider.
3. In the scheme of the application, machine vision is adopted to identify and detect the characteristic parameters of the thermal paper, and detection and identification of the target object, such as the size of the thermal paper, the positioning of the black mark position and the like, are realized through an AI algorithm built in the machine vision. The characteristic parameters of the thermal paper are identified and acquired based on machine vision, and the characteristic parameters are acquired without manual measurement, so that the labor cost is greatly reduced; and the accuracy and precision of the characteristic parameters acquired by the machine vision are higher.
Drawings
The above features, technical features, advantages and modes of realisation of the present invention will be further described in the following detailed description of preferred embodiments thereof, which is to be read in connection with the accompanying drawings.
FIG. 1 is a flow chart of one embodiment of a thermal paper print identification method of the present application;
FIG. 2 is a flow chart of another embodiment of a thermal paper print identification method of the present application;
FIG. 3 is a block diagram of the structure of one embodiment of the thermal paper print recognition apparatus of the present application;
fig. 4 is a block diagram showing the structure of another embodiment of the thermal paper printing identification apparatus of the present application.
Detailed Description
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following description will be made with reference to the accompanying drawings. It is obvious that the drawings in the following description are only some examples of the invention, and that for a person skilled in the art, other drawings and embodiments can be derived from them without inventive effort.
For the sake of simplicity, only the parts relevant to the invention are schematically shown in the drawings, and they do not represent the actual structure as a product. Moreover, in the interest of brevity and understanding, only one of the components having the same structure or function is illustrated schematically or designated in some of the drawings. In this document, "one" means not only "only one" but also a case of "more than one".
It should be further understood that the term "and/or" as used in this specification and the appended claims refers to any and all possible combinations of one or more of the associated listed items and includes such combinations.
In this context, it is to be understood that, unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In addition, in the description of the present application, the terms "first", "second", and the like are used only for distinguishing the description, and are not intended to indicate or imply relative importance.
In one embodiment, referring to the accompanying drawings of the specification 1, the embodiment discloses a thermal paper printing identification method, which comprises the following steps:
s100, collecting an image of thermal paper to be printed;
specifically, before printing, the thermal paper to be printed can be scanned and shot through the camera, and a complete shot image of the thermal paper can be obtained for subsequent identification and detection.
S200, identifying the image of the thermal paper and acquiring the characteristic parameters of the thermal paper;
specifically, after the thermal paper image is acquired, the thermal paper image is subjected to identification processing, characteristic parameters of the thermal paper, such as the size, black mark position or gap position of the thermal paper, are acquired, and if pre-printed content exists, the pre-printed content and the size of the pre-printed content are further identified.
S300, searching whether standard thermal paper matched with the thermal paper exists in a thermal paper library according to the characteristic parameters of the thermal paper; if yes, go to step S400; the thermal paper library stores characteristic data of standard thermal paper with different specifications and models;
specifically, standard thermal paper with different specifications and models is stored in the thermal paper library, so that after the characteristic parameters of the thermal paper are obtained, the standard printing paper with characteristic data matched with the characteristic parameters of the thermal paper can be inquired and matched in the thermal paper library to see whether the standard printing paper with the characteristic data matched with the characteristic parameters of the thermal paper can be matched in the thermal paper library. The thermal paper library may be a local database or a cloud database, which is not limited in this embodiment.
S400, acquiring printing parameters of the standard thermal paper;
specifically, the thermal sensitive paper with different specifications and models corresponds to different printing parameters, and the corresponding relation can be stored in a thermal sensitive paper library in advance, so that the characteristic data and the printing parameters of the standard thermal sensitive paper are stored in the thermal sensitive paper library; if the corresponding standard thermal paper is matched in the thermal paper library, the printing parameters of the standard thermal paper can be further acquired. After the comparison is finished, corresponding detailed parameters (including the middle position of a gap, the stepping number of a motor and the like) are directly used, and the positioning precision in a heating point row is achieved. Of course, the correspondence between the thermal paper of different specifications and types and the printing parameters may also be integrated on the printing control end of the printer instead of being stored in the thermal paper library.
And S500, performing printing setting according to the printing parameters so as to print the thermal paper.
In this embodiment, standard thermal paper of different specifications and models is stored in the thermal paper storage, and basically, thermal paper of various specifications (such as thermal label paper and thermal black label paper) existing in the market can be covered therein. The standard thermal paper with different specifications and models has different characteristic data, and in addition, the specification and model of the thermal paper are different, and natural printing parameters are also different. The standard thermal paper with different specifications and models, the characteristic data and the printing parameters are stored in the thermal paper library, so that after the image of the thermal paper to be printed at present is identified, the image can be matched in the thermal paper library after the characteristic parameters are obtained, whether the image is the standard thermal paper existing in the thermal paper library is judged, and if the image is matched with the characteristic parameters, the printing parameters of the standard thermal paper can be directly called for printing setting. Through the thermal paper printing identification method, the thermal paper to be printed at present can be intelligently identified, so that the corresponding printing parameters are matched and called for setting, the thermal printer can be compatible with the thermal printing paper with multiple specifications, and the working performance is greatly improved.
The thermal paper warehouse in the embodiment can be constructed in advance, the thermal paper with a new specification appears in the later period, and the warehouse entry can be added to update the thermal paper warehouse. Specifically, a thermal paper library is established; the method specifically comprises the following steps:
s001, collecting images of standard thermal sensitive paper with different specifications;
s002, labeling the standard thermal sensitive paper to obtain characteristic parameters of each standard thermal sensitive paper; the characteristic parameters comprise any one or more of paper type, paper size, gap, black mark position, color of preprinted content, position and size of the preprinted content;
specifically, the standard thermal paper may be marked by transmitting a corresponding marking instruction after artificial measurement and judgment, or by obtaining relevant characteristic parameters through corresponding measurement by machine vision or a photoelectric sensing device on a thermal printer. The characteristic parameters of the standard thermal paper mainly refer to relevant printing parameters which can influence printing, such as the type of paper, whether the paper belongs to black mark thermal paper, label thermal paper and the like; the size of the paper; if the label paper is the label paper, gaps exist among the label paper, and the positioning of the gaps is involved; if the paper is the black mark thermal paper, the position of the black mark is positioned; if the thermal paper has preprinted content, the color, size, position and the like of the preprinted content are marked.
S003, determining corresponding printing parameters according to the characteristic parameters of the thermal paper; thermal paper of different specifications and models has different corresponding printing parameters due to different paper sizes, different black mark positions or different gap positions, such as different motor step numbers, different printing positions and the like. According to the characteristic parameters of the thermal paper, the printing parameters are determined, and the positioning precision can be controlled to the width (+ -0.03125 mm) of a heating point row.
And S004, storing the characteristic parameters and the printing parameters of the standard thermal paper with different specifications into a thermal paper library.
Specifically, after the characteristic parameters and the printing parameters of the standard thermal paper with different specifications are obtained, the characteristic parameters and the printing parameters are finally stored in a thermal paper library, and during subsequent printing, as long as the corresponding standard thermal paper can be matched in the thermal paper library, the corresponding printing parameters can be directly called for setting so as to facilitate subsequent printing.
In the above embodiment, if the standard thermal paper matching the thermal paper to be printed can be found in the thermal paper library, the print parameters of the standard thermal paper can be directly called for print setting. However, if the thermal paper with the new specification is sold in the market, the thermal paper cannot be matched with the corresponding standard thermal paper in the thermal paper library, and the compatibility cannot be realized. In another embodiment of the present application, on the basis of any of the above embodiments, a processing manner that the identified thermal paper cannot be searched for and matched with the standard thermal paper in the thermal paper library is added, specifically, as shown in fig. 2, the embodiment includes:
s100, collecting an image of thermal paper to be printed;
s200, identifying the image of the thermal paper and acquiring the characteristic parameters of the thermal paper;
s300, searching whether standard thermal paper matched with the thermal paper exists in a thermal paper library according to the characteristic parameters of the thermal paper; if yes, go to step S400, otherwise go to step S600; the system comprises a thermal paper library, a database and a database, wherein the thermal paper library stores characteristic data of standard thermal paper with different specifications and models;
s400, when the standard thermal paper matched with the thermal paper is found, obtaining the printing parameters of the standard thermal paper;
s500, performing printing setting according to the printing parameters so as to print the thermal paper;
s600, judging that the thermal paper is a new thermal paper;
s601, collecting the image of the new thermal paper;
s602, identifying the image of the new thermal paper and acquiring the characteristic parameters of the new thermal paper;
s603, after the new thermal paper is put into a paper bin, paper feeding learning is carried out, the new thermal paper is detected through a photoelectric sensor, and the characteristic data of the new thermal paper is obtained;
s604, comparing the characteristic parameters of the new thermal paper with the characteristic data of the new thermal paper;
s605, when the comparison is consistent, taking the new thermal paper as new standard thermal paper, and determining the printing parameters of the new standard thermal paper according to the characteristic data of the new thermal paper;
and S606, uploading the characteristic data and the printing parameters of the new standard thermal paper to the thermal paper library.
In this embodiment, if the identified thermal paper cannot find the corresponding standard thermal paper in the thermal paper bank, the subsequent updating process of the thermal paper bank will be performed. Specifically, an image of the new thermal paper is collected first, the image of the new thermal paper is identified based on a machine vision algorithm, and characteristic parameters of the new thermal paper, such as the type, size, black mark position or gap position of label paper, size and position of pre-printed content, color, and the like, are obtained. According to the method, the thermal paper base can be updated at any time in the working process, if the matching object cannot be found in the thermal paper base due to the currently identified thermal paper, the learning process can be started, the characteristic parameters and the printing parameters of the new thermal paper are obtained, and therefore the thermal paper base is updated.
In addition, in this embodiment, a photoelectric sensor arranged on the thermal printer is further used to verify the characteristic parameters of the new thermal paper, for example, when the characteristic parameters of the new thermal paper acquired through machine vision are consistent with the characteristic data of the new thermal paper acquired during paper feeding learning, it can be determined that the characteristic parameters of the thermal paper are correct, and a subsequent database updating process can be directly entered. Compared with the single characteristic parameter obtained only by machine vision or photoelectric sensing equipment, the method has the advantages that the accuracy is obviously higher, and only the characteristic parameter obtained by the machine vision and the photoelectric sensing equipment which are mutually verified can be used as the characteristic parameter of the new thermal paper to be updated in the thermal paper library, so that the data accuracy in the thermal paper library is greatly improved.
Preferably, if the characteristic parameters of the new thermal paper are inconsistent with the characteristic data acquired by the photoelectric sensing detection, a prompt is initiated to prompt a user to manually check the characteristic parameters of the new thermal paper, so that the accuracy of updating the data stored in the thermal paper database is ensured.
In any of the above embodiments, regarding the step S200 of recognizing the image of the thermal paper, the characteristic parameters of the thermal paper are acquired; the characteristic parameters of the thermal paper in the image can be acquired by various implementation modes, for example, the existing image processing technology can be adopted. Specifically, for example, the characteristic parameters of the thermal paper are obtained through the calculation processing of the gray data of the image; for another example, when the image of the thermal paper to be printed is collected, a standard reference object can be placed, so that the standard reference object and the thermal paper can be identified through the image in the subsequent image processing, and the size data of the thermal paper can be calculated based on the actual size information and the pixel size information of the standard reference object and by combining the pixel size information of the thermal paper.
Of course, more advanced, machine vision can be adopted to identify the thermal paper image and acquire the characteristic parameters of the thermal paper. The method specifically comprises the following steps:
identifying characteristic parameters of the thermal paper corresponding to the image of the thermal paper based on machine vision; the characteristic parameters include paper size, black mark position or gap position, color and size of preprinted content.
Machine vision can realize quality analysis, for example, the specification of the thermal paper can be analyzed, namely the black label thermal paper or the label thermal paper; on the other hand, analysis of the amount can be achieved, such as visually detecting the size of the thermal paper in the image, the positioning of the black mark, the position of the gap between the label sheets, and the like.
In addition, the implementation of step S200 can also be implemented by using a neural network model in deep learning. Specifically, identifying an image of the thermal paper, and acquiring a characteristic parameter of the thermal paper; the method specifically comprises the following steps:
inputting the image of the thermal paper into a pre-trained thermal paper identification model for identification; the thermal paper identification model is trained by adopting a preset number of thermal paper training samples with different specifications, and each training sample comprises an image of the thermal paper and label information for identifying characteristic parameters of the thermal paper;
and identifying and outputting the characteristic parameters of the thermal paper corresponding to the thermal paper image.
In another embodiment of the present application, a cloud thermal paper library is first established, and thermal paper of various specifications and models, characteristic parameters thereof, and printing parameters thereof are stored in the paper library. Generally, a binocular camera of a thermal printer is used for shooting thermal paper to be printed, the full-view of the thermal paper is generally needed to be shot, then an AI algorithm is used for identifying an image of the thermal paper, and characteristic parameters of the thermal paper are obtained. On the other hand, paper feeding verification is performed through photoelectric sensing equipment (such as a photoelectric pair) on the thermal printer, the feature data of the thermal paper is also acquired, the feature data acquired through the photoelectric sensing equipment is compared with the feature parameters acquired through shooting of the camera for verification, and under the condition that the feature data and the feature parameters are consistent, the thermal paper and the feature parameters are stored in a thermal paper library at the cloud end. Of course, the captured thermal paper image may also be labeled by manual measurement or the like to obtain characteristic data (such as paper, gaps, black marks, and colors and sizes of preprinted content), and the characteristic parameters may be stored in the cloud as a comparison database.
In addition, the printing parameters of the thermal paper with different specifications and models are set differently, so that the printing parameters can be further determined according to the thermal paper with different specifications and models or the characteristic parameters of the thermal paper. Generally, a corresponding table can be set in advance, the corresponding table is integrated in a printing controller of the thermal printer, and printing parameters corresponding to the thermal paper with different specifications or types or characteristic parameters of the thermal paper can be stored in the cloud, so that the setting can be called subsequently.
In the normal use process, the rear camera of the handheld thermal printer is used for shooting and sampling paper before printing, and then characteristic parameters of the paper are identified and acquired, the characteristic parameters are uploaded and compared with the cloud thermal paper library, when the characteristic parameters are successfully compared and matched with the characteristic data of the standard thermal paper in the cloud thermal paper library, the learning of printing paper is considered to be completed, and the printing parameters corresponding to the paper are directly used for positioning and printing labels.
If the characteristic parameters acquired by the camera cannot be matched with the parameters of the cloud thermal paper base, for example, the specification and the size of the thermal paper acquired by the camera cannot be matched in the cloud thermal paper base, a new paper class is considered to be met, a new paper learning and importing process is carried out, and in the first step, the camera on the thermal printer is still used for analyzing and acquiring the characteristic parameters of the thermal paper; secondly, prompting a user to put paper into a paper bin for paper feeding learning, and obtaining characteristic data of the thermal paper in a photoelectric sensing detection mode; and thirdly, comparing the data acquired by the camera with the data acquired by the photoelectric pair, if the comparison is consistent, uploading the characteristic parameters of the thermal paper to a paper library to be used as standard thermal paper, and if the comparison is not consistent, prompting that the learning fails and considering that the paper cannot support.
The characteristic parameters of the thermal paper acquired through machine vision and the characteristic data of the thermal paper detected through photoelectric induction are compared and are consistent, and if all the parameters required to be compared are completely the same, the comparison is considered to be consistent. Preferably, the comparison difference of each parameter is smaller than a preset range due to measurement or identification errors, and the comparison is considered to be consistent. For example, if the set size error is 2mm, if the width of the thermal paper acquired by camera recognition is 80mm, and the width of the thermal paper acquired by photoelectric pair is 81mm during paper feeding learning, the difference is only 1mm, and the width parameters are determined to be consistent because the difference is within the allowable range of the size error. In addition, if the black mark position comparison is also within the error allowable range, the black mark position parameter comparison of the black mark position and the black mark position is judged to be consistent, if the characteristic parameters of the thermal paper only comprise the width and the black mark position, the two parameters are only required to be compared and consistent, and the final result of consistent comparison can be obtained. Similarly, the obtained characteristic parameters of the thermal paper to be identified are matched in a thermal paper library in a cloud end, and if the difference value between the characteristic parameters of the thermal paper to be identified and the characteristic data of the standard thermal paper is within an error allowable range, the characteristic parameters and the standard thermal paper are considered to be matched in a consistent manner.
In the embodiment, the thermal paper library at the cloud is used as a reference for comparing the characteristic parameters of the thermal paper, and after comparison is completed, the printing parameters (including the gap middle position, the motor step number and the like) of the paper library are directly used, so that the positioning accuracy in a heating point row is realized.
In addition, in the embodiment, a camera is used for shooting, and the judgment and the collection of the paper characteristic parameters are carried out by a visual algorithm. And a traditional photoelectric tube learning scheme is adopted as a second-order learning scheme and is matched with a visual algorithm for verification, so that dynamic paper library updating is realized. By adopting the scheme of the embodiment, the requirements of labels and black label paper of all specifications on the market can be basically met, and even the paper for thermal printing which does not appear on the market can be printed in a compatible way.
Based on the same technical concept, another embodiment of the present application discloses a thermal paper printing identification apparatus, which may be a separate device, and of course, preferably, the thermal paper printing identification apparatus may be integrated in a thermal printer. As shown in fig. 3, the thermal paper printing identification apparatus of the present embodiment includes:
the image acquisition module 10 is used for acquiring an image of the thermal paper to be printed;
specifically, for example, a rear camera is installed on a thermal printer, so that when printing paper is replaced, shooting and scanning are performed to acquire image data of thermal paper to be printed. Of course, the camera may not be disposed on the thermal printer, and if the thermal paper printing identification device is formed as an independent device, the camera is disposed on the independent device.
The identification detection module 20 is used for identifying the image of the thermal paper and acquiring the characteristic parameters of the thermal paper;
specifically, after the image of the thermal paper is acquired, the image is further subjected to recognition detection processing to acquire characteristic parameters of the thermal paper, such as the width of the thermal paper, the position of a black mark, and if the thermal paper is a label thermal paper, the position of a gap between the front and rear label paper (gap positioning) is involved. The identification acquisition of the characteristic parameters can be acquired by using the existing image processing technology or machine vision.
The searching and matching module 30 is used for searching standard thermal paper matched with the thermal paper in a thermal paper library according to the characteristic parameters of the thermal paper; the thermal paper library stores characteristic data of standard thermal paper with different specifications and models;
specifically, after the characteristic parameters of the thermal paper are obtained, the matching search is carried out in the thermal paper library only, and the standard thermal paper which is consistent with the characteristic parameters is found. The thermal paper library is a database, and standard thermal paper with different specifications and models, characteristic data thereof and corresponding printing parameters are stored in the thermal paper library. The database can be arranged locally or in a cloud. Because the characteristic data of the thermal paper with different specifications and models is stored in the thermal paper library, the searching and matching can be carried out only according to the characteristic parameters of the thermal paper to be printed. The matching rule can be preset, for example, if the error between the characteristic parameter of the thermal paper to be printed and the characteristic data of a certain thermal paper in the thermal paper library is within an allowable range, the matching of the characteristic parameter and the thermal paper can be regarded as successful, and in addition, because the characteristic parameter may include a plurality of parameters, such as a size parameter, a black mark position parameter and the like, whether the matching is successful or not can be comprehensively judged according to the matching condition of each specific characteristic parameter, for example, the matching is successful only if each specific characteristic parameter of the thermal paper matches with a standard thermal paper in the thermal paper library.
The parameter obtaining module 40 is used for obtaining the printing parameters of the standard thermal paper when the standard thermal paper matched with the thermal paper is found;
specifically, different thermal paper corresponds to different printing parameters, and the corresponding relationship can be set in advance, for example, the printing parameters corresponding to each standard thermal paper are preset in advance, and subsequently, when printing is performed, as long as the thermal paper to be printed is matched with the standard thermal paper, the printing parameters of the standard thermal paper can be directly called for printing. The preset corresponding relation between each standard thermal paper and the printing parameters can be stored in a thermal paper library, and can also be directly integrated at the printing control end of the thermal printer, so that the printing control end is convenient to directly call during printing.
And the printing setting module 50 is used for performing printing setting according to the printing parameters so as to print the thermal paper.
The thermal paper printing identification device of the embodiment can be compatible with thermal paper of various specifications, and the technical problem of poor compatibility of the existing thermal printer is solved. The thermal paper library can store the characteristic data of various types of thermal paper on the market, so that the printing of various types of thermal paper on the market can be compatible, the thermal paper with different specifications and models can be printed, the printing parameters can be correspondingly set, the corresponding printing parameters can be more suitable for the current thermal paper, and the printing positioning precision and the printing quality can be improved.
In another embodiment of the present application, based on the above embodiment of the apparatus, as shown in fig. 4, the thermal paper printing identification apparatus further includes:
a database establishing module 60 for establishing a thermal paper library; the database building module specifically comprises:
the sample acquisition submodule 61 is used for acquiring images of standard thermal sensitive paper with different specifications;
a label obtaining module 62, configured to label the standard thermal paper to obtain characteristic parameters of each standard thermal paper; the characteristic parameters comprise paper type, paper size, gap or black mark position;
and the storage submodule 63 is used for storing the characteristic parameters and the printing parameters of the standard thermal paper with different specifications into a thermal paper library.
In this embodiment, the standard thermal paper is labeled, which may be an artificial measurement label, or a characteristic parameter of the thermal paper is obtained through machine vision, then the standard thermal paper is subjected to paper feeding learning, characteristic data of the standard thermal paper is obtained through detection of a photoelectric sensing device on a printer, and finally whether the characteristic parameter of the standard thermal paper is consistent with the characteristic data is compared, and if so, labeling is performed according to the characteristic parameter of the standard thermal paper. The characteristic parameters of the standard thermal paper mainly refer to relevant printing parameters which can influence printing, such as the type of paper, whether the paper belongs to black mark thermal paper, label thermal paper and the like; the size of the paper; if the label paper is the label paper, gaps exist among the label paper, and the positioning of the gaps is involved; if the paper is the black mark thermal paper, the position of the black mark is positioned; if the thermal paper has preprinted content, the color, size, position and the like of the preprinted content are marked.
The thermal paper library stores characteristic parameters of standard thermal paper with different specifications and models, and preferably stores printing parameters of the standard thermal paper. The correspondence of the printing parameters to the standard thermal paper can be obtained in advance by a plurality of printing measurements.
In another embodiment of the apparatus of the present application, as shown in fig. 4, in addition to any one of the above embodiments of the apparatus, the thermal paper printing identification apparatus further includes:
a judging module 70, configured to, when a standard thermal paper type matching the characteristic parameter is not found, judge that the thermal paper is a new thermal paper;
the image acquisition module 10 is further configured to acquire an image of the new thermal paper;
the identification detection module 20 is further configured to identify the image of the new thermal paper and obtain a characteristic parameter of the new thermal paper;
a paper advance learning module 80, configured to perform paper advance learning after the new thermal paper is placed in the paper bin, detect the new thermal paper through a photoelectric sensor, and acquire feature data of the new thermal paper;
a comparison operation module 90, configured to compare the characteristic parameter of the new thermal paper with the characteristic data of the new thermal paper; and when the comparison is consistent, the new thermal sensitive paper is used as new standard thermal sensitive paper,
the parameter obtaining module 40 is further configured to determine a printing parameter of the new standard thermal paper according to the characteristic data of the new thermal paper;
and the storage updating module 100 is used for uploading the characteristic data and the printing parameters of the new standard thermal paper to the thermal paper library. And uploading to the thermal paper storage.
The device for printing and identifying the thermal sensitive paper can update the thermal sensitive paper library in time, and particularly, if the standard thermal sensitive paper matched with the thermal sensitive paper is not found, the characteristic parameters of the thermal sensitive paper are obtained in real time, and are reduced under the condition of passing verification and uploaded to the thermal sensitive paper library, and the thermal sensitive paper library is updated in time, so that the compatibility of the thermal printer is enhanced, the device can be compatible with the existing thermal sensitive printing paper with various specifications commonly on the market, and the thermal sensitive printing paper coming out of the market can also be learned and updated in the thermal sensitive paper library in time so as to accurately print in the subsequent process.
Of course, in another embodiment of the present application, the thermal paper library does not need to be updated, and when a piece of thermal paper that cannot be matched is encountered, the printing parameters of the thermal paper may be generated in real time based on the currently acquired characteristic parameters of the thermal paper according to a preset rule.
The recognition detection module in any of the above embodiments can be implemented in various ways, such as various existing image processing recognition technologies. It can also be implemented using machine vision or deep learning neural network models. For example, the identification detection module specifically includes:
the machine vision identification submodule identifies the characteristic parameters of the thermal paper corresponding to the image of the thermal paper based on machine vision; the characteristic parameters comprise paper size, black mark position or gap position, and color and size of preprinted content.
For another example, the identification detection module specifically includes:
the input sub-module is used for inputting the image of the thermal paper into a pre-trained thermal paper identification model for identification; the thermal paper identification model is trained by adopting a preset number of thermal paper training samples with different specifications, and each training sample comprises an image of the thermal paper and label information for identifying characteristic parameters of the thermal paper;
and the identification output submodule is used for identifying and outputting the characteristic parameters of the thermal paper corresponding to the thermal paper image.
In another embodiment of the present application, a thermal printer is disclosed, in which the thermal paper printing identification device according to any one of the above embodiments is integrated.
The thermal printer of this application is integrated with the thermal paper of this application and prints recognition device to the thermal paper that can compatible various different specifications prints, and the precision and the location of printing all are very accurate.
In addition, it is to be noted that the apparatus embodiments of the present application correspond to the method embodiments, and the technical details of the method embodiments of the present application are also applicable to the apparatus embodiments of the present application, and are not repeated herein for reducing the repetition.
It should be noted that the above embodiments can be freely combined as necessary. The foregoing is only a preferred embodiment of the present invention, and it should be noted that it is obvious to those skilled in the art that various modifications and improvements can be made without departing from the principle of the present invention, and these modifications and improvements should also be considered as the protection scope of the present invention.
Claims (10)
1. A thermal paper printing identification method is characterized by comprising the following steps:
collecting an image of thermal paper to be printed;
identifying the image of the thermal paper and acquiring the characteristic parameters of the thermal paper;
searching standard thermal paper matched with the thermal paper in a thermal paper library according to the characteristic parameters of the thermal paper; the thermal paper library stores characteristic data of standard thermal paper with different specifications and models;
when the standard thermal paper matched with the thermal paper is found, acquiring the printing parameters of the standard thermal paper;
and performing printing setting according to the printing parameters so as to print the thermal paper.
2. The method for identifying a thermal paper print as claimed in claim 1, further comprising:
establishing a thermal paper library; the method specifically comprises the following steps:
collecting images of standard thermal sensitive paper with different specifications;
marking the standard thermal paper to obtain characteristic parameters of each standard thermal paper; the characteristic parameters comprise any one or more of paper type, paper size, gap, black mark position, color of preprinted content, position and size of the preprinted content;
determining corresponding printing parameters according to the characteristic parameters of the thermal paper;
and storing the characteristic parameters and the printing parameters of the standard thermal paper with different specifications into a thermal paper library.
3. The method for identifying a thermal paper print as claimed in claim 1, further comprising:
when the standard thermal paper type matched with the characteristic parameters is not found, judging that the thermal paper is a new thermal paper;
collecting an image of the new thermal paper;
identifying the image of the new thermal paper, and acquiring the characteristic parameters of the new thermal paper;
after the new thermal paper is put into a paper bin, paper feeding learning is carried out, the new thermal paper is detected through a photoelectric sensor, and the characteristic data of the new thermal paper is obtained;
comparing the characteristic parameters of the new thermal paper with the characteristic data of the new thermal paper;
when the comparison is consistent, taking the new thermal paper as new standard thermal paper, and determining the printing parameters of the new standard thermal paper according to the characteristic data of the new thermal paper;
and uploading the characteristic data and the printing parameters of the new standard thermal sensitive paper to the thermal sensitive paper library.
4. The method for identifying the printing of the thermal paper as claimed in claim 1, characterized in that the image of the thermal paper is identified, and the characteristic parameters of the thermal paper are obtained; the method specifically comprises the following steps:
identifying characteristic parameters of the thermal paper corresponding to the image of the thermal paper based on machine vision; the characteristic parameters include any one or more of a paper type, a paper size, a black mark position, a gap position, a color and a size of the preprinted content.
5. The method for identifying the printing of the thermal paper as claimed in claim 1, wherein the image of the thermal paper is identified, and the characteristic parameters of the thermal paper are acquired; the method specifically comprises the following steps:
inputting the image of the thermal paper into a pre-trained thermal paper identification model for identification; the thermal paper identification model is trained by adopting a preset number of thermal paper training samples with different specifications, and each training sample comprises an image of the thermal paper and label information for identifying characteristic parameters of the thermal paper;
and identifying and outputting the characteristic parameters of the thermal paper corresponding to the thermal paper image.
6. A thermal paper print recognition device, comprising:
the image acquisition module is used for acquiring an image of the thermal paper to be printed;
the identification detection module is used for identifying the image of the thermal paper and acquiring the characteristic parameters of the thermal paper;
the searching and matching module is used for searching standard thermal paper matched with the thermal paper in a thermal paper library according to the characteristic parameters of the thermal paper; the thermal paper library stores characteristic data of standard thermal paper with different specifications and models;
the parameter acquisition module is used for acquiring the printing parameters of the standard thermal paper when the standard thermal paper matched with the thermal paper is found;
and the printing setting module is used for performing printing setting according to the printing parameters so as to print the thermal paper.
7. A thermal paper print recognition apparatus as recited in claim 6, further comprising:
the database establishing module is used for establishing a thermal paper library; the database establishing module specifically comprises:
the sample acquisition submodule is used for acquiring images of standard thermal sensitive paper with different specifications;
the marking acquisition submodule is used for marking the standard thermal paper and acquiring the characteristic parameters of each standard thermal paper; the characteristic parameters comprise any one or more of paper type, paper size, gap, black mark position, color of preprinted content, position and size of the preprinted content;
the parameter determining submodule is used for determining corresponding printing parameters according to the characteristic parameters of the thermal paper;
and the storage submodule is used for storing the characteristic parameters and the printing parameters of the standard thermal paper with different specifications into a thermal paper library.
8. The thermal paper print recognition apparatus according to claim 6 or 7, further comprising:
the judging module is used for judging that the thermal paper is a new thermal paper when the standard thermal paper type matched with the characteristic parameters is not found;
the image acquisition module is also used for acquiring the image of the new thermal paper;
the identification detection module is also used for identifying the image of the new thermal paper and acquiring the characteristic parameters of the new thermal paper;
the paper feeding learning module is used for carrying out paper feeding learning after the new thermal sensitive paper is placed in a paper bin, detecting the new thermal sensitive paper through a photoelectric sensor and acquiring the characteristic data of the new thermal sensitive paper;
the comparison operation module is used for comparing the characteristic parameters of the new thermal paper with the characteristic data of the new thermal paper; and when the comparison is consistent, the new thermal sensitive paper is used as new standard thermal sensitive paper,
the parameter acquisition module is also used for determining the printing parameters of the new standard thermal paper according to the characteristic data of the new thermal paper;
and the storage updating module is used for uploading the characteristic data and the printing parameters of the new standard thermal paper to the thermal paper library.
9. The device for printing and identifying the thermal paper as claimed in claim 6, wherein the identification detection module specifically comprises:
the machine vision identification submodule identifies the characteristic parameters of the thermal paper corresponding to the image of the thermal paper based on machine vision; the characteristic parameter includes any one or more of a paper type, a paper size, a black mark position, a gap position, a color and a size of the preprinted content.
10. A thermal printer having integrated therein a thermal paper print recognition device according to any one of claims 6 to 9.
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