CN107408289A - Print inspection method and use its printing inspection apparatus and printing inspection apparatus main body - Google Patents
Print inspection method and use its printing inspection apparatus and printing inspection apparatus main body Download PDFInfo
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- CN107408289A CN107408289A CN201680015365.9A CN201680015365A CN107408289A CN 107408289 A CN107408289 A CN 107408289A CN 201680015365 A CN201680015365 A CN 201680015365A CN 107408289 A CN107408289 A CN 107408289A
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T1/00—General purpose image data processing
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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
- B41J2203/00—Embodiments of or processes related to the control of the printing process
- B41J2203/01—Inspecting a printed medium or a medium to be printed using a sensing device
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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
- B41J3/00—Typewriters or selective printing or marking mechanisms characterised by the purpose for which they are constructed
- B41J3/407—Typewriters or selective printing or marking mechanisms characterised by the purpose for which they are constructed for marking on special material
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- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Image Processing (AREA)
- Image Analysis (AREA)
- Investigating Materials By The Use Of Optical Means Adapted For Particular Applications (AREA)
Abstract
It is an object of the invention to, a kind of character string for being arranged with multiple dot patterns is provided, even if when distance and the distance between the consecutive points in 1 character of intercharacter are essentially identical or than the distance between consecutive points in 1 character in short-term, each character, the print inspection method and device of the comparison check for line character of going forward side by side can also be sheared from character string.In order to solve the above problems, form the shearing of each character of character string by shooting process and image zooming-out treatment process, wherein, the shooting of the identification object carried out during the printing for the dot pattern that shooting process often carries out 1 character amount to printed article, image zooming-out treatment process is for captured image in process is shot, the character that obtaining needs to judge press quality will be printed before shooting image and corresponding character it is just printed after shooting image difference, be thus extracted as turning into the printing image of the character of check object.
Description
Technical field
The present invention relates to a kind of print inspection method and its device, more particularly to being suitable for reading by camera
Character, the symbol of food, the production date on pharmaceutical packing container, production numbering etc. are printed on by ink-jet printer etc.
(following, symbol is also contained in character, referred to as " charactor "), and differentiate the inspection method for printing whether good print character
And its device.
Background technology
It is legally obligated that day moon production year, shelf-life, product batch number etc. are carried out on food, pharmaceutical packing container
Display, realize this point is the printing equipments such as ink-jet printer.Printing equipment be arranged on conveying production line (including packaging
Production line) on, printed to conveying the packing container come one by one.By the print inspection of the printing of reading packing container
Device judges whether correctly to have carried out the printing based on printing equipment.
As the background technology of the printing inspection apparatus, there are Japanese Unexamined Patent Publication 2003-168119 publications (patent document 1).
In patent document 1, record and " identification object for being arranged with multiple dot patterns, repeat what expansion shooting was obtained
The step of dot image and to dot pattern orientation projection expansion process after image the step of, until that can obtain and form
Untill the projected image of the corresponding quantity of the quantity of the dot pattern of the arrangement of identification object, it is possible thereby to according to multiple dot patterns
To obtain the border of each intercharacter.Then, can be with the dot pattern on clip image according to the projected image finally obtained, and incite somebody to action
Each dot pattern being cut out is contrasted with the model pattern registered respectively, integrates each comparing result to differentiate the suitable of character string
When whether ".
Prior art literature
Patent document
Patent document 1:Japanese Unexamined Patent Publication 2003-168119 publications
The content of the invention
The invention problem to be solved
Following methods have been recorded in the patent document 1：Identification object for being arranged with multiple dot patterns, is expanded
The step of shooting obtained dot image, untill the consecutive points in 1 character combine, it is possible thereby at the time point by point
Between the position that separates be identified as the border of intercharacter, and shear the character as check object.When with 1 should be identified as
The distance between point of character is compared, it should be identified as belonging to the distance between point of kinds of characters (between print character away from
From) it is significantly greater when, the print inspection method of the patent document 1 is effective method.But when this is closer to the distance, if
Expansion process is carried out untill being combined between should being identified as the point of 1 character, then intercharacter can also combine, and becoming can not
Carry out the character shearing of every 1 character.Therefore, it is an object of the present invention to provide a kind of distance even between print character
The distance between consecutive points in 1 character are essentially identical or than the distance between consecutive points in 1 character in short-term,
The shearing of every 1 character can be carried out from the identification object for being arranged with multiple dot patterns, the comparison check for line character of going forward side by side
Print inspection method and device.
Means for solving the problems
In order to solve above-mentioned problem, for example with the structure described in the scope of request patent protection.The application includes more
The individual means to solve the above problems, as one of example, a kind of print inspection method is included, it is to arranging by point diagram
Each print character is sheared to judge print character in the image that the identification object of the print character of case composition is shot and obtained
Quality, it has：The shooting of object is identified when carrying out the printing of dot pattern of 1 character amount to printed article each time
Shooting process；Extraction turns into the image of the printing image of the character of check object from image captured in shooting process
Extraction process process；To the printing image of the determine object character obtained in image zooming-out treatment process with being used as base in advance
The numerical computations process that quasi- character pattern and the consistent degree of character pattern registered are calculated；And will be in numerical computations work
Numerical value and the whether qualified threshold value for being used to judge the press quality of determine object character set in advance obtained in sequence
It is compared, to judge the whether qualified judgement process of press quality.
Invention effect
According to the present invention it is possible between the consecutive points in a kind of distance even in intercharacter and 1 character are provided away from
From it is essentially identical or more shorter than the distance between the consecutive points in 1 character when, can also be sheared from print character string each
Check object character carries out the print inspection method of the comparison check of print character and device.
Brief description of the drawings
Fig. 1 is the figure for the setting example for representing the printing inspection apparatus in embodiment 1.
Fig. 2 is the block diagram of the printing inspection apparatus in embodiment 1.
Fig. 3 is the figure for the print inspection method for illustrating the printing inspection apparatus in embodiment 1.
Fig. 4 is the figure for representing conventional print inspection method.
Fig. 5 is that the image for illustrating the printing inspection apparatus in embodiment 1 obtains the figure of timing.
Fig. 6 is the figure for the print inspection method for illustrating the printing inspection apparatus in embodiment 2.
Fig. 7 is the block diagram of the printing inspection apparatus in embodiment 3.
Embodiment
Hereinafter, embodiments of the invention are illustrated using accompanying drawing.
Embodiment 1
Fig. 1 is the setting example of the printing inspection apparatus used in the present embodiment.In Fig. 1, printing inspection apparatus by with
Inferior part composition：Lighting device 4, it is directed to is held by the printing equipment of the grade of ink-jet printer 21 to food, pharmaceutical packing
The printed article 6 that device is printed irradiates the light that camera 3 reads the sufficient light quantity needed for print character；Camera 3, it is
Read the shooting unit for the image for including character string, the check object of the printed article 6 of the character string light that has been illuminated；Monitor
2, it shows read image or the condition checked setting, the display of inspection result；Printing inspection apparatus main body 1, its
Print inspection processing unit and lighting control section are equipped with, in the image that print inspection processing unit progress is read from camera 3
The processing of extraction printing image etc., and the whether qualified judgement of check object character is carried out, the lighting control section is illuminated
Light quantity, the control of timing etc.；And external device (ED), its print inspection processing unit into printing inspection apparatus main body 1 provide
The various instructions of image procossing etc..
In the production plant of plastic bottle beverage, can etc., from the printhead 22 of special ink-jet printer 21 to going out
The bottle of product before factory, the surface injection drop 9 of jar are to print the shelf-life, production is numbered etc..Conveyed by the grade of conveyer belt 5
By ink-jet printer 21 printed dispatch from the factory before product, if being transported to camera 3 can confirm that check object character
Position, then the irradiation of light is carried out by the lighting device 4 of LED illumination etc., read using camera 3 including check object character
Image, and by printing image send to printing inspection apparatus main body 1.
In printing inspection apparatus main body 1, in advance for the character of identification object, the good dot pattern of printing state is registered
On the basis of character pattern.In printing inspection apparatus main body 1, carry out shearing from the image read at each character first
Reason, by the way that the printing image for each character being cut out is contrasted with corresponding benchmark character pattern respectively, respectively sentences to differentiate
Determine the whether appropriate of the printing state of Object Character.If being judged as that printing state is bad herein, arranged from the object that dispatches from the factory
Remove.
Fig. 2 represents an example of the block diagram of the printing inspection apparatus in the present embodiment.In fig. 2, printing inspection apparatus
Print inspection processing unit 11 in main body 1 is carried out with often printing the shooting timing calculating part 111 of 1 character, the difference of image takes
Go out processing unit 112, image enhancement processing unit 113, numerical computations portion 114, print inspection has as character quality judging portion 115
The various processing closed.In addition, the print inspection processing unit 11 is carried out by CPU by software processing, but can also be by special
Hardware is carried out.
First, if the print inspection processing unit 11 in printing inspection apparatus main body 1 obtains drop from ink-jet printer 21
Injection timing signal, then by print inspection processing unit 11 often print 1 character shooting timing calculating part 111 come
The incoming timing of printing image is calculated, according to the instruction from print inspection processing unit 11, from image input signal generating unit 16
Notify image to obtain timing in camera 3, and controlled according to the instruction from print inspection processing unit 11, lighting control section 18
The light quantity of lighting device 4, and coordinate the image reading of camera 3 regularly to control the luminous timing of lighting device 4.
The image read by camera 3 is input in the image input unit 14 in printing inspection apparatus main body 1, and temporarily
When be stored in image storage part 15.The difference of image in print inspection processing unit 11 is taken out processing unit 112 and carried out from storage
The shear treatment of each check object character in the present embodiment is taken out in shooting image in image storage part 15, and is being schemed
The image enhancements such as the noise elimination as improving the character picture being cut out in processing unit 113.In addition it is also possible to by image
Difference takes out processing unit 112 and image enhancement processing unit 113 carries collectively as image zooming-out processing unit, the image zooming-out processing unit
It is taken as the printing image for the character as determine object.
It is stored with ROM12 for the identifying processing of print character string or the whether qualified journey for judging press quality
Sequence.In addition, the benchmark character pattern of each structure character of the character string as check object is stored with RAM13, is filled from outside
Put 7 setting data inputted etc..Then, the figure carried out in the image enhancement processing unit 113 in print inspection processing unit 11
After improvement processing, in the numerical computations portion 114 in print inspection processing unit 11, come according to the program being stored in ROM12
Implement the calculating to printing image and the consistent degree of benchmark character pattern.Then, the character in print inspection processing unit 11
In quality judging portion 115, according to the condition being stored in RAM13, read print is carried out according to the program being stored in ROM12
The comparison of map brushing picture and the benchmark character pattern being stored in RAM13, determination processing.
In a series of processing more than, it will print image from input and output portion 17, check the display such as condition, inspection result
Into monitor 2.
Fig. 3 represents an example of print inspection method related to the present embodiment.The present embodiment for printing ABC this 3
Individual character, and illustrated for the whether qualified situation about being judged of the press quality of 3 characters.In Fig. 3 epimere
Fig. 3 (1) shown in horizontal string representation intercharacter the distance situation bigger than distance between the point in 1 character,
The character pitch of horizontal string representation character A and B shown in Fig. 3 (2) of Fig. 3 hypomere from the point in 1 character it
Between the essentially identical situation of distance.Whichever situation, first, read after print character A and before print character B
1st image.The image obtained is Fig. 3 (A).Next, the 2nd is read after print character B and before print character C
Open image.The image obtained is Fig. 3 (B).Finally, the 3rd image is read after print character C.The image obtained is
Fig. 3 (C).In this way, reading image in 1 character of every printing, and obtain the image of character quantity.
Next, the printing by the way that these image real-time image processings are sheared with determine object character to every 1 character
Image.First, printing image of the image (A) for check object character A is selected.Next, the printing for check object character B
Image, by obtaining the difference for reading image (B) and reading image (A), delete as image (A) and the common figure of image (B)
The character A of picture part, leaves character B part, therefore is set to check object character B printing image.For checking
Object Character C similarly, by obtaining the difference for reading image (C) and reading image (B), is deleted as image (B) and figure
As the character AB of (C) common image part, character C part is left, therefore be set to determine object character C printing
Image.By these processing, as shown in Fig. 3 (D), the printing image of determine object character can be sheared to every 1 character.
Then, by printing image that this is cut out and the character datum being pre-stored in the RAM13 in printing inspection apparatus
The image of symbol pattern is compared, and calculates consistent degree by numerical computations portion 114.By character quality judging portion 115,
By the numerical value obtained by the numerical computations portion 114 and it is stored in press quality in RAM13, judging check object character
Whether qualified threshold value be compared, to judge the whether qualified of press quality.
Herein, the existing example of the cutting method of print character is described according to Fig. 4.It is identical with Fig. 3, Fig. 4's
The distance of horizontal string representation intercharacter shown in Fig. 4 (1) of epimere is than distance between the consecutive points in 1 character bigger
Situation, the character pitch of horizontal string representation the character A and B shown in Fig. 4 (2) of Fig. 4 hypomere from in 1 character
The essentially identical situation of distance between consecutive points.First, after print character " ABC ", the printing image of the character string is read.Read
The image taken is Fig. 4 (A).Next, when carrying out the shearing of print character, as the image for the position between explicit character
Handle and implement expansion process.After expansion process, the position with the disconnection of the projective distribution in character string direction at a right angle will be projected in
The position for being judged as intercharacter is put, therefore, implements to expand in a manner of the projective distribution of the consecutive points in 1 character does not turn off
The image procossing of each point.Having carried out the image after the expansion process turns into Fig. 4 (B).After Fig. 4 (B) image procossing, it will throw
Line character shearing is entered in the position that shadow distribution disconnects as the position of intercharacter, but as Fig. 4 (C) is shown, intercharacter away from
In the case of Fig. 4 (1) of epimere from Fig. 4 bigger than with a distance between the consecutive points in 1 character, can be divided into A, B, C this 3
Individual character, but character A and B character pitch under essentially identical Fig. 4 with a distance between the consecutive points in 1 character
In Fig. 4 (2) of section, although character C can be sheared, open position can not be specified between character A and character B, and by word
Symbol AB is judged as a character, and character A and B can not be respectively divided.
In this way, in existing example, there is a situation where can not implement character according to the state printed out shears, but basis
The present embodiment, as shown in figure 3, can provide one kind not only has sufficient character pitch from the case of as Fig. 3 (1),
In the case that the intercharacter as shown in Fig. 3 (2) is closer to the distance, the character shearing of every 1 character can also be carried out, and can be with
Judge the whether qualified printing inspection apparatus of press quality.
In the present embodiment, it is necessary to read image in 1 character of every printing, it is therefore desirable to correctly grasp character and read
Regularly.Therefore, in the present embodiment, character reading timing establishing method is directed to using Fig. 5 to illustrate.
Fig. 5 (A) represents the synoptic diagram of apparatus structure.From the nozzle injection being arranged on the printhead 22 of ink-jet printer 21
Drop 9, fall and character formed on printed article 6, but from drop 9 leave nozzle until time delay for falling according to printhead with
Gap 10 between printed article changes.Therefore, the gap 10 between the printhead and printed article is inputted into ink-jet printer 21, deposited
Storage is until the time delay fallen.In addition, in the present embodiment, carried out for the storage part of ink-jet printer until falling
The storage of time delay, but can also be stored for printing inspection apparatus, or prepare storage device etc. in addition.
By the detection signal for the sensor 8 being arranged in the conveying devices such as conveyer belt 5 print the timing of beginning.
Used ink-jet printer 21 has used so-called continuous type in the present embodiment, and it is always from the nozzle on head with constant week
Phase sprays drop, and can not make drop on printed article 6 by the recoverer in the printhead of ink-jet printer 21 come
Drop is reclaimed, the drop for wanting to fall on printed article 6 is deflected to the direction for not being recycled to recoverer and fallen in printed article 6
On.In the ink-jet printer 21 of the continuous type, dot clock signal is coordinated to carry out the drop injection of constant cycle.
Fig. 5 (B) represents timing diagram.As shown in Fig. 5 (B), if ink-jet printer 21 obtains the detection letter from sensor 8
Number, then after having carried out the software processing that sets printing condition of print character string etc. in the scheduled time, start to print.Will
The software processing end time starts timing as the counting of printing points, and dot clock signal is counted, and from ink-jet printer
21 send trigger signal, trigger signal notice shooting timing in the points of every 1 character amount of counting to printing inspection apparatus.
Herein, trigger signal for example produces in the timing of the rising of dot clock signal.The timing for actually starting image reading be from
Trigger signal is sent to start until falling of being calculated according to the gap 10 between initially set printhead and printed article
After time delay.The trigger signal is sent to the amount for the number of characters for forming character string, and respectively from trigger signal is sent to adding
After the time for having gone up the time delay, the image based on camera 3 is implemented by printing inspection apparatus and obtained.As above, by setting
Determine image reading timing, image can be obtained to every 1 character.
In addition, the image based on camera obtains, if the amount of 1 character can be shot, printing inspection need not be obtained
The difference with shooting image afterwards, image zooming-out processing unit before Object Character is looked into only to carry from the image captured by shoot part
Take the printing image of the character as check object.
As above, the present embodiment is to be shot and obtained from the identification object to being arranged the print character being made up of dot pattern
Each print character is sheared to judge the print inspection method of the quality of print character, if it has following process in the image obtained：
The shooting process of the shooting of object is identified when carrying out the printing of dot pattern of 1 character amount to printed article each time；From
Extraction turns into the image zooming-out processing of the printing image of the character of check object in captured image in the shooting process
Process；To the printing image of the determine object character obtained in image zooming-out treatment process with being used as benchmark character figure in advance
The numerical computations process that case and the consistent degree of character pattern registered are calculated；And it will be obtained in numerical computations process
Value is with set in advance for compared with judging the whether qualified threshold value of press quality of determine object character, coming
Judge the whether qualified judgement process of press quality.
In addition, setting image zooming-out treatment process for captured image in process is shot, will obtain needs to judge print
The character of brush quality will be printed before shooting image and corresponding character it is just printed after shooting image difference and obtain
The image zooming-out obtained is the printing image of the character as check object.
In addition, in the image for being shot and being obtained from the identification object to being arranged the print character being made up of dot pattern
Each print character is sheared to judge the printing inspection apparatus main body of press quality, if it has：Timing calculating part is shot, it is calculated
Often print the shooting timing of 1 character；Image input signal generating unit, its shooting calculated based on shooting timing calculating part
Regularly, image acquisition timing is produced to the shooting unit of outside；Image input unit, it is obtained as the figure captured by shooting unit
Picture；Image storage part, it is stored by the image acquired in image input unit；Image zooming-out processing unit, it is from image storage part
Extraction turns into the printing image of the character of check object in the shooting image stored；Numerical computations portion, its calculating carry in image
Take the dot pattern of the determine object character obtained in processing unit consistent with the dot pattern registered in advance as benchmark character
Degree；And character quality judging portion, the numerical value obtained in numerical computations portion and set in advance are used to judge by it
The whether qualified threshold value of the press quality of Object Character is compared, to judge the whether qualified of press quality.
In addition, image zooming-out processing unit, for the shooting image stored in image storage part, acquirement is needed to judge
The character of press quality will be printed before shooting image and corresponding character it is just printed after shooting image difference institute
The image of acquisition, it is extracted as the printing image of the character as determine object.
In addition, in the image for being shot and being obtained from the identification object to being arranged the print character being made up of dot pattern
Each print character is sheared to judge the printing inspection apparatus main body of press quality, it is configured to have：Image input unit, it is obtained
Take as the image captured by the shooting unit of outside；Image storage part, it is stored by the image acquired in image input unit；Print
Brush checks processing unit, and it is directed to the shooting image stored in image storage part, carries out signal transacting and judges press quality
It is whether qualified；And image input signal generating unit, its shooting unit to outside produce image and obtain timing, image input
Signal generator produces image and obtains timing whenever the printing of dot pattern of 1 character amount is carried out to printed article.
Therefore, according to this embodiment, it can provide a kind of printing inspection apparatus, it is not only having sufficient printing image
The character pitch of determine object character, even in character pitch from the case of near, can also carry out every 1 word from the case of
The character shearing of symbol, and can be determined that the whether qualified of press quality.
Embodiment 2
This example demonstrates that when the printing inspection apparatus side of the container for checking print character etc. has stain etc., it is right
In the example for shearing also effective printing inspection apparatus for the determine object character for print image.
Fig. 6 is the figure for the print inspection method for illustrating the printing inspection apparatus in the present embodiment.Fig. 6 and Fig. 3 (2) equally,
Print character is shown as ABC this 3 characters, character A and B character pitch is basic from a distance between the point in 1 character
Identical situation.In figure 6, first, before print character, the shooting of the scope of print character string is carried out.The figure obtained
Seem Fig. 6 (A).As shown in Fig. 6 (A), if stain etc. be present in character string prints preset range, obtaining in the picture should
Stain.Next, after character A has been printed, and the 2nd image is read before print character B.The image obtained is
Fig. 6 (B).Similarly, after character B has been printed, and the 3rd image is read before print character C.The image obtained
It is Fig. 6 (C).Finally, after character C has been printed, the 4th image is read.The image obtained is Fig. 6 (D).In this way, to print
Image before brush and often print the image of 1 character and be read out, and obtain the image that number of characters adds 1.From these images,
By image procossing, the character for carrying out comparison check is taken out by each character.First, image (B) and figure are obtained for character A
As the difference of (A), it is possible thereby to the position of the stain as image (A) Yu the common image of image (B) be deleted, only by character A
Take out the image as check object character A.For character B, by obtaining the difference of image (C) and image (B), can delete
As the position and character A of image (B) and the stain of the common image of image (C), only character B is taken out as check object word
Accord with B image.In addition, being directed to character C, also by the difference for obtaining image (D) and image (C), can delete as image (C)
The position of the stain of common image and character A, B with image (D), character C is only taken out into the figure as check object character C
Picture.By these processing, as shown in Fig. 6 (E), the printing image of determine object character can be sheared to every 1 character.
As above, if the structure of the present embodiment is：In process is shot, before the printing of 1 initial character is carried out, to bag
The region that printing is included as the scope of the character string of identification object is shot, and using the shooting image as background image, is taken
Obtain the difference of image and background image obtained by shooting after each character printing afterwards.
Thus, according to the present embodiment, by reading the image before printing, even in the print inspection of the container to be checked etc.
In the case that device side has stain etc., it can also be directed to and all check character, will only eliminate the character portion of stain part
Comparison check is carried out as check object.
Embodiment 3
In the present embodiment, miniaturization to device, the effective printing inspection apparatus of easiness of the setting of device are illustrated
Example.
Fig. 7 is the block diagram of the printing inspection apparatus in the present embodiment.In the figure 7, have in printing inspection apparatus main body 1
The position relevant with printing and the position relevant with print inspection.
In print inspection processing unit 11, the printed data processing unit 116 as printing equipment, printing timing ga(u)ge are being carried out
As calculation portion 117 while the various processing relevant with printing, 1 character of often printing as printing inspection apparatus is also carried out
Shooting timing calculating part 111, the difference of image take out processing unit 112, image enhancement processing unit 113, numerical computations portion 114,
The various processing relevant with print inspection as character quality judging portion 115.
In addition, in monitor 2, printing condition in a series of processing conducted in printing equipment, interior is shown
Information needed for setting check of appearance etc. or the printing image in a series of processing conducted in printing inspection apparatus, inspection
Look into the information needed for the inspection of condition, inspection result etc..
Also, camera 3 and printhead 22 are integrally formed in a manner of position is adjustable, as being accommodated in 1 frame
Interior device is connected to printing inspection apparatus main body 1.Therefore, as long as setting the position relationship of a camera 3 and printhead 22,
Fixed position relationship can be always maintained at afterwards.
First, in the printed data processing unit 116 in print inspection processing unit 11, to the character string printed by Printing Department
Content, printing condition etc. set.If receiving the detection signal from sensor 8, have passed through according to by printing
After the scheduled time that brush checks the time delay that the printing timing calculating part 117 in processing unit 11 is calculated, supplied by ink
The ink provided to portion 23 is sprayed as drop from printhead 22, and shelf-life, production numbering etc. are printed to printed article.
In addition, in print inspection processing unit 11, the shooting timing calculating part 111 of 1 character of every printing be present, at this
In, the incoming timing of printing image is calculated, and produced from image input signal according to the instruction from print inspection processing unit 11
Portion 16 to camera 3 notify image obtain timing while, according to the instruction from print inspection processing unit 11, lighting control section
18 control the light quantity of lighting devices 4 and coordinate the image reading of camera 3 regularly to control the luminous timing of lighting device 4.
Action after this is identical with Fig. 2 explanation.
As above, the present embodiment is set to printing inspection apparatus main body and printing equipment being integrally formed in 1 frame, and
The printing inspection apparatus main body of monitor used in shared printing inspection apparatus main body and printing equipment.
In addition, printing inspection apparatus has above-mentioned printing inspection apparatus main body and has been integrally formed bat in a frame
The device of the printhead of the injection drop of unit and printing equipment is taken the photograph, the shooting unit is based on producing from image input signal
The image in portion obtains timing, and the shooting of object is identified in the printing of every 1 character amount of progress.
Therefore, according to the present embodiment, printing equipment and printing inspection apparatus is integrally formed in 1 frame, and share
The monitor and print inspection processing unit 11 of printing equipment and printing inspection apparatus, therefore miniaturization is easily achieved, in addition,
Printhead 22 and camera 3 is integrally formed in 1 frame, as long as therefore frame is once set, it is possible to it is solid always
Surely the position relationship of printhead 22 and camera 3 is kept, is easy to carry out the setting of time delay.
In addition, the present invention is not limited to the above embodiments, including various deformations.For example, in above-mentioned reality
Apply in example, although being set to be shot to read image when printing every 1 character, 1 character is not limited to, on such as
The sizing character such as shelf-life, product batch number, can implement shooting before and after the printing of sizing character, and as inspection pair
As.
In addition, the establishing method of image reading timing is by used ink jetting head in the present embodiment and print
The input in the gap of brush thing, sensor signal, the Dot Clock of ink-jet printer are carried out, as long as but 1 can be identified
The stop timing of the dot pattern of character amount and since spraying drop until the method for time delay for dropping down onto printed article, can regard
For with the present embodiment identical structure.
In addition, above-described embodiment is the content for the ease of understanding the present invention and explaining, it is not limited to necessary
Possesses illustrated entire infrastructure.Furthermore it is possible to a part for the structure of certain embodiment is replaced into the structure of other embodiment,
Alternatively, it is also possible to add the structure of other embodiment in the structure of certain embodiment.In addition, one of structure for each embodiment
Part, the addition, deletion, displacement of other structures can be carried out.
Symbol description
1：Printing inspection apparatus main body, 2：Monitor, 3：Camera, 4：Lighting device, 5：Conveyer belt, 6：Printed article, 7：
External device (ED), 8：Sensor, 9：Drop, 10：Gap between printing head and printed article, 11：Print inspection processing unit, 12：
ROM、13：RAM、14：Image input unit, 15：Image storage part, 16：Image input signal generating unit, 17：Input and output portion,
18：Lighting control section, 21：Ink-jet printer (IJP), 22：Printhead, 23：Providing ink portion, 111：Often print 1 character
Shoot timing calculating part, 112：The difference of image takes out processing unit, 113：Image enhancement processing unit, 114：Numerical computations portion,
115：Character quality judging portion, 116：Printed data processing unit, 117：Print timing calculating part.
Claims (12)
1. a kind of print inspection method, is shot and is obtained from the identification object to being arranged with the print character being made up of dot pattern
Each print character is sheared to judge the quality of print character in the image obtained, it is characterised in that is had：
The shooting work of the shooting of object is identified when carrying out the printing of dot pattern of 1 character amount to printed article each time
Sequence；
The image of printing image of the extraction as the character of check object carries in captured image from the shooting process
Take treatment process；
To the printing image of the determine object character obtained in described image extraction process process with being used as character datum in advance
The numerical computations process that the consistent degree for the character pattern for according with pattern and registering is calculated；And
By the numerical value obtained in the numerical computations process and the print for being used to judge determine object character set in advance
The whether qualified threshold value of brush quality is compared, to judge the whether qualified judgement process of press quality.
2. print inspection method according to claim 1, it is characterised in that
Described image extraction process process is directed to captured image in the shooting process, and acquirement is needed to judge printed matter
The character of matter will be printed before shooting image and respective symbols it is just printed after shooting image the figure that is obtained of difference
Printing image as being extracted as the character as check object.
3. print inspection method according to claim 2, it is characterised in that
In the shooting process, before the printing of 1 initial character is carried out, shooting includes word of the printing as identification object
The region of the scope of string is accorded with, using the shooting image as background image, obtains and shooting institute is carried out after each character printing afterwards
The difference of the image of acquisition and the background image.
4. a kind of printing inspection apparatus main body, shoots from the identification object to being arranged with the print character being made up of dot pattern
And each print character is sheared to judge press quality in the image obtained, it is characterised in that have：
Timing calculating part is shot, it calculates the shooting timing for often printing 1 character；
Image input signal generating unit, its shooting timing calculated based on the shooting timing calculating part, the shooting to outside
Unit produces image and obtains timing；
Image input unit, it is obtained as the image captured by shooting unit；
Image storage part, it is stored by the image acquired in described image input unit；
Image zooming-out processing unit, in its shooting image stored from described image storage part extraction as check object character
Printing image；
Numerical computations portion, its calculate the dot pattern of the determine object character obtained by described image extraction process portion with advance
The consistent degree for the dot pattern registered as benchmark character；And
Character quality judging portion, the numerical value obtained by the numerical computations portion and set in advance are used for judgement pair by it
As the whether qualified threshold value of the press quality of character is compared, to judge the whether qualified of press quality.
5. printing inspection apparatus main body according to claim 4, it is characterised in that
Described image extraction process portion is directed to the shooting image stored in described image storage part, and will obtain needs to judge print
The character of brush quality will be printed before shooting image and respective symbols it is just printed after the difference of shooting image obtained
Image zooming-out be as determine object character printing image.
A kind of 6. printing inspection apparatus, it is characterised in that
Have：Printing inspection apparatus main body described in claim 4 or 5；And
Timing is obtained based on the image from described image input signal generating unit, entered in the printing of every 1 character amount of progress
The shooting unit of the shooting of the row identification object.
7. printing inspection apparatus according to claim 6, it is characterised in that
The printing inspection apparatus also has：
Monitor, it shows the shooting image, checks condition, inspection result.
8. the printing inspection apparatus according to claim 6 or 7, it is characterised in that
There is the light quantity of lighting device and the illumination control of luminous timing outside control in the printing inspection apparatus main body
Portion processed,
The printing inspection apparatus also has the lighting device controlled by the lighting control section.
9. the printing inspection apparatus according to any one of claim 6~8, it is characterised in that
Have in the printing inspection apparatus main body and be used for outside monitor output signal and input checking condition
Input and output portion.
10. the printing inspection apparatus main body according to claim 4 or 5, it is characterised in that
The printing inspection apparatus main body and printing equipment are integrally formed in 1 frame, and shares and is filled by the print inspection
Put main body and monitor that the printing equipment uses.
11. a kind of printing inspection apparatus, it is characterised in that have：
Printing inspection apparatus main body described in claim 10；And
The device of the printhead of the injection drop of shooting unit and the printing equipment has been integrally formed in 1 frame, it is described
Shooting unit obtains timing based on the image from described image input signal generating unit, in the printing of 1 character amount of every progress
The shooting of identification object described in Shi Jinhang.
12. a kind of printing inspection apparatus main body, it is carried out from the identification object to being arranged with the print character being made up of dot pattern
Each print character is sheared to judge press quality in the image for shooting and obtaining, it is characterised in that is had：
Image input unit, it is obtained as the image captured by the shooting unit of outside；
Image storage part, it is stored by the image acquired in described image input unit；
Print inspection processing unit, it is directed to the shooting image stored in described image storage part, carries out signal transacting and sentences
Determine the whether qualified of press quality；And
Image input signal generating unit, its shooting unit to outside produce image and obtain timing,
Described image input signal generating unit produces when carrying out the printing of dot pattern of 1 character amount to printed article each time
Described image obtains timing.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2015-067422 | 2015-03-27 | ||
| JP2015067422A JP6675831B2 (en) | 2015-03-27 | 2015-03-27 | Print inspection method, print inspection apparatus using the same, and print inspection apparatus main body |
| PCT/JP2016/054634 WO2016158057A1 (en) | 2015-03-27 | 2016-02-18 | Print inspection method, print inspection device using same, and print inspection device body |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107408289A true CN107408289A (en) | 2017-11-28 |
| CN107408289B CN107408289B (en) | 2020-12-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201680015365.9A Active CN107408289B (en) | 2015-03-27 | 2016-02-18 | Printing inspection method, printing inspection apparatus using the same, and printing inspection apparatus main body |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP6675831B2 (en) |
| CN (1) | CN107408289B (en) |
| WO (1) | WO2016158057A1 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112219112A (en) * | 2018-06-08 | 2021-01-12 | 麦克赛尔新领域株式会社 | Printing inspection machine |
| CN112740218A (en) * | 2018-10-01 | 2021-04-30 | 株式会社日立产机系统 | Printing inspection apparatus |
| CN112740271A (en) * | 2019-06-17 | 2021-04-30 | 大日本印刷株式会社 | Determination device, determination device control method, determination system control method, and program |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6962228B2 (en) * | 2018-02-14 | 2021-11-05 | セイコーエプソン株式会社 | Image quality inspection camera system, printing device and light source adjustment method |
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Also Published As
| Publication number | Publication date |
|---|---|
| WO2016158057A1 (en) | 2016-10-06 |
| JP6675831B2 (en) | 2020-04-08 |
| JP2016186766A (en) | 2016-10-27 |
| CN107408289B (en) | 2020-12-25 |
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