CN109324055A - Image detection with compartmentalization image resolution ratio - Google Patents
Image detection with compartmentalization image resolution ratio Download PDFInfo
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- CN109324055A CN109324055A CN201810864399.6A CN201810864399A CN109324055A CN 109324055 A CN109324055 A CN 109324055A CN 201810864399 A CN201810864399 A CN 201810864399A CN 109324055 A CN109324055 A CN 109324055A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
- G01N21/88—Investigating the presence of flaws or contamination
- G01N21/8851—Scan or image signal processing specially adapted therefor, e.g. for scan signal adjustment, for detecting different kinds of defects, for compensating for structures, markings, edges
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41F—PRINTING MACHINES OR PRESSES
- B41F33/00—Indicating, counting, warning, control or safety devices
- B41F33/0036—Devices for scanning or checking the printed matter for quality control
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
- G01N21/88—Investigating the presence of flaws or contamination
- G01N21/8806—Specially adapted optical and illumination features
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
- G01N21/88—Investigating the presence of flaws or contamination
- G01N21/95—Investigating the presence of flaws or contamination characterised by the material or shape of the object to be examined
- G01N21/956—Inspecting patterns on the surface of objects
- G01N21/95607—Inspecting patterns on the surface of objects using a comparative method
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
- H04N1/00002—Diagnosis, testing or measuring; Detecting, analysing or monitoring not otherwise provided for
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
- H04N1/00002—Diagnosis, testing or measuring; Detecting, analysing or monitoring not otherwise provided for
- H04N1/00005—Diagnosis, testing or measuring; Detecting, analysing or monitoring not otherwise provided for relating to image data
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
- H04N1/00002—Diagnosis, testing or measuring; Detecting, analysing or monitoring not otherwise provided for
- H04N1/00026—Methods therefor
- H04N1/0005—Methods therefor in service, i.e. during normal operation
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
- H04N1/00002—Diagnosis, testing or measuring; Detecting, analysing or monitoring not otherwise provided for
- H04N1/00026—Methods therefor
- H04N1/00058—Methods therefor using a separate apparatus
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
- H04N1/04—Scanning arrangements, i.e. arrangements for the displacement of active reading or reproducing elements relative to the original or reproducing medium, or vice versa
- H04N1/0402—Scanning different formats; Scanning with different densities of dots per unit length, e.g. different numbers of dots per inch (dpi); Conversion of scanning standards
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
- H04N1/04—Scanning arrangements, i.e. arrangements for the displacement of active reading or reproducing elements relative to the original or reproducing medium, or vice versa
- H04N1/0402—Scanning different formats; Scanning with different densities of dots per unit length, e.g. different numbers of dots per inch (dpi); Conversion of scanning standards
- H04N1/0408—Different densities of dots per unit length
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
- H04N1/04—Scanning arrangements, i.e. arrangements for the displacement of active reading or reproducing elements relative to the original or reproducing medium, or vice versa
- H04N1/0402—Scanning different formats; Scanning with different densities of dots per unit length, e.g. different numbers of dots per inch (dpi); Conversion of scanning standards
- H04N1/042—Details of the method used
- H04N1/0426—Details of the method used using different sized scanning elements, e.g. reproducing different sized dots
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
- H04N1/04—Scanning arrangements, i.e. arrangements for the displacement of active reading or reproducing elements relative to the original or reproducing medium, or vice versa
- H04N1/0402—Scanning different formats; Scanning with different densities of dots per unit length, e.g. different numbers of dots per inch (dpi); Conversion of scanning standards
- H04N1/042—Details of the method used
- H04N1/0455—Details of the method used using a single set of scanning elements, e.g. the whole of and a part of an array respectively for different formats
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
- G01N21/88—Investigating the presence of flaws or contamination
- G01N21/8851—Scan or image signal processing specially adapted therefor, e.g. for scan signal adjustment, for detecting different kinds of defects, for compensating for structures, markings, edges
- G01N2021/8887—Scan or image signal processing specially adapted therefor, e.g. for scan signal adjustment, for detecting different kinds of defects, for compensating for structures, markings, edges based on image processing techniques
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2201/00—Features of devices classified in G01N21/00
- G01N2201/06—Illumination; Optics
- G01N2201/062—LED's
Abstract
The present invention relates to one kind for by means of computer (12, 15) method of image detection is carried out in the machine (14) of processing printable fabric, wherein, the image data (16) of print job passes through computer (12 in the print last stage, 15) it analyzes and is divided into the image-region (2 with different images content, 3, 4), by different image-regions (2, 3, 4) it is associated with different image resolution ratios, the image data (5) of the printing is shot by means of the imaging sensor (9) of image detecting system (10) being made of each individual module and analysis, it is characterized in that, each individual module of described image sensor (9) can apply different images resolution ratio and so be controled by computer (15) to it, so that shooting has the respectively different image resolution ratios attached (19) different images region and image detecting system (10) are forwarded it to.
Description
Technical field
The present invention relates to the methods for carrying out image detection in printing machine to ensure printing product progress quality
And system.
The present invention is in the technical field of automation quality control.
Background technique
Many modern printing machines all have automated image detection system, can be to printing by these image detecting systems
As a result it is checked in terms of press quality.Here, not only checking realized aim colour in the case where polychrome printing
Value, and check to version (Passer), that is, the double exposure of each single color separation.Furthermore (also in the case where single color printing) set is checked
Quasi- (Register), that is, the correct interval between the edge of printing substrate, and check general press quality.The latter exists
It is related to the image object determined in terms of correct present, for these image objects importantly, by these images pair
As for example correctly being presented in terms of seamed edge transition.Example to this is bar code or QR code, to these bar codes or
For person's QR code, the minimum deviation for printing image may result in the change of transmitted data content, and thus cause to print
Brush mistake.Another example is package insert, equally possible with strong influence in this misprint.
Especially in biggish page printer and rotary printer, the image detecting system inside printing machine is pacified mostly
After last printing and upper gloss varnish mechanism, to be thus able to carry out intraconnected measurement during formal printing.Image
Detection system has one or more video cameras or scan stripes (Scannerleiste) thus, is used for corresponding intraconnected image
Detection.Based on thus taken image data, be then able to obtain it is for color measuring, for general image inspection
And for the data of version and registration accuracy (Passer-und Registerhaltigkeit).
Here, the different target of image detection has required different quality requirements in terms of required image resolution ratio,
These quality requirements are that applied video camera or scan stripes must provide.As a result, for example in order to examine to version and register
Accuracy needs high image resolution ratio (for example, at least 300dpi to 600dpi and more), and for color measuring, it is smaller
Image resolution ratio (50dpi to 150dpi) is sufficient.For general image inspection, usual 100dpi is between 300dpi
Image resolution ratio be sufficient.In addition to image resolution ratio, another factor (is produced based on another factor and is taken the photograph to applied
The requirement of camera) be printing substrate conveying speed, this conveying speed and respectively applied by printing machine the related (example of type
Page printer or rotary printer in this way).
Currently, in the prior art, RGB video camera and scan stripes based on CCD are mainly applied, however these equipment are in page
In offset press in the case where the usual high conveying speed of at least 3 meter per seconds and in digital (or ink-jet) printing machine
It cannot be with the entire print of highest resolution detection of current applied 600dpi at least in the case where the conveying speed of 0.6 meter per second
Map brushing picture.Here, bottleneck relates generally to: video camera analysis processing electronic device in data processing or video camera and then
Interface (Schnittstelle) between the data processing in pattern process computer.
Therefore this is necessarily resulted in correspondingly using more video cameras, wherein for example a video camera only monitors
Color measuring strips in printing substrate, the second video camera executes general image inspection and third video camera only scans set
Fiducial mark note, so that thus, it is possible to execute the target complete of image detection.This however have as a drawback that, i.e., so that installation expend
And then the cost factor for image detecting system is significantly increased.
In order to eliminate the problem, it is therefore advantageous that be equipped with imaging sensor, i.e., such video camera or scan stripes: should
Video camera or scan stripes can monitor entire printing substrate according to mentioned requirement.Because simplest solution is (i.e.
Using such video camera or scan stripes, the video camera or scan stripes always can be detected and be handled entire printing with highest resolution
Substrate) be it is impossible because this camera chain it is either too expensive otherwise to the follow-up data of pattern process computer at
Reason proposes to make excessive demands, therefore the camera chain that must seek alternatively herein.
Summary of the invention
Therefore it is an object of the present invention to propose a kind of in a part with camera chain as printing machine
The method that image detection is carried out in video camera, disadvantage known in the art can be overcome by this method.
The task passes through a kind of according to the invention for being carried out in the machine of processing printable fabric by means of computer
The method of image detection solves, wherein the image data of print job is analyzed by computer and is divided into and has
These different images regions are associated with different image resolution ratios, the image printed by the image-region of different images content
Data are shot by means of the imaging sensor (including each single part) of image detecting system and analysis, which is characterized in that image
These each single parts of sensor can apply different image resolution ratios, and be controled by computer, so that right
Different images region is shot with the respectively different image resolution ratios attached and forwards it to image detecting system.
Conclusive herein to be, the applied imaging sensor for camera chain can be in for the different zones of printing image
Reveal different image resolution ratios.As a result, in the scope of image detection, in order to it is generated printing product quality inspection,
It can be detected respectively with the image resolution ratio of optimization for each single region.Image detecting method must be fitted correspondingly herein
A possibility that new assigned in these.I.e., it is necessary to pass through computer (such as the control meter of the computer of image detecting system, printing machine
Calculation machine or the computer for printing the last stage) it is analyzed according to print last stage data: which image data should be currently printed, this
A little image datas then must be divided into the respective image region with different images content, and these figures for accordingly optimizing
As resolution ratio must be associated with these different images regions.This has been able to directly complete in the print last stage in the ideal case
At, if if applied print last stage system can accomplish.Otherwise by the computer of postposition (such as image procossing calculate
Machine) it accepts, the computer of the postposition is responsible for the monitoring of image detecting system.Then, this division is accordingly provided to image
Detection system, thus, the figure for the optimization that the image-region accordingly divided independently can respectively be attached by imaging sensor
As resolution ratio is detected, and analyzed in pattern process computer.
The advantageous and then preferred improvement project of the method according to the invention is by affiliated dependent claims and by having
There is the description of affiliated attached drawing to generate.
It is in a kind of advantageous modification of this method according to the invention, the region with different images content includes
Such image-region: these image-regions are used for version and set locating tab assembly and/or for color measuring and/or for generality
Image inspection.That is, can correspondingly be detected to version and register mark with highest image resolution ratio, color control
Item is detected with corresponding lesser image resolution ratio, and the region for general pattern inspection is then with corresponding medium image point
Resolution is detected.
Here, another advantageous modification of the method according to the invention is, by the image district to version and set locating tab assembly
Domain is associated at least image resolution ratio of 200dpi, and the image-region for being used for color measuring is associated at least image of 50dpi
Resolution ratio, and by the image-region for being used for general image inspection for the readable numeric data code of inspection machine (such as bar code)
It is associated at least image resolution ratio of 200dpi, and is associated at least image resolution of 100dpi to check other regions
Rate.For for version and set locating tab assembly, in present image inspection system, there is an urgent need at least 200dpi's or even 600dpi
Highest image resolution ratio, so as to execute the accurate detection as far as possible to version and register.For general image inspection
Speech, the medium image resolution ratio of at least 200dip are sufficient determining numeric data code (such as bar code or QR code), and for
Check that then at least 100dip is sufficient in other regions.Color measuring control is carried out and the detection to color control bar, this
Need 50dpi up to the minimum image resolution ratio of 200dpi in current system.
It is in another advantageous modification of this method according to the invention, based on there are different resolutionsThese image datas of the image-region of detection, computer establish interface criterion (Interface-
Vorschrift), which is associated with corresponding image-capturing positions for image-region, these image-regions are sent to
Image detecting system, described image detection system control each single part of described image sensor, so as to each single image
Region is analyzed and processed with the image resolution ratio that it is respectively attached.In order to which method is provided with different resolutions in the correct way
The image-region and its image detecting system that rate accordingly divides, thus, image detecting system can for example be started with these data,
By computer (such as the control computer or the computer of print last stage that can be image detection computer, printing machine) based on tool
There is the image data of the image-region of different demarcation to establish out for image detecting system (precisely for video camera system
System) interface criterion, which is then passed on image detecting system.It is passed to be then able to so control described image
Each individual module of sensor, so that these each individual modules are with the image resolution ratio of its optimization respectively attached to accordingly not
Same image-region is analyzed and processed.Controling for these each individual modules of imaging sensor is usually by image sensing herein
The control electronic device of device independently realizes that the information is by means of following information: which kind of image resolution ratio which should detect with
A little regions.That is, although imaging sensor accordingly those of controls part optically always with its maximum image resolution ratio pair
Its corresponding region is detected.It is detected however because this causes mentioned in Data Analysis Services the problem of
Image data is by so-called " combination of pixels (Binning) " (i.e. each single image point is combined into a common picture point)
And it reduces.
Another advantageous modification of the method according to the invention is herein, so controls each of described image sensor
Single part, so that weighting image information by multiple pixels in reduced image resolution ratio image-region detected
To a pixel.Because the optical device of imaging sensor always detects corresponding printing image with complete image resolution ratio
(or the division region accordingly attached), it is therefore desirable for image resolution ratio controled by means of each single part of imaging sensor
Processing electronic device is analyzed by it to be carried out.Reason for this is that: the image detection of imaging sensor and image procossing
Key point is seldom optical device, but be postposition analysis processing electronic device can not with necessary speed handle by
Image data provided by optical device.If perhaps the analysis processing electronic device itself of imaging sensor is capable of handling
If corresponding image data, then image detecting system itself is overcritical for the transmission of mass data.Therefore, it passes through
With handling electronic device by the analysis of image detecting system to imaging sensor, the phase to the individual module of imaging sensor is realized
It should control, for being detected with different images resolution ratio.
Another advantageous modification of the method according to the invention is there is the image district of different images resolution ratio herein
Domain is read out with complete RGB color information.Because by means of the method according to the invention in the scope of image detection example
As also executed color measuring, therefore allow for naturally, these corresponding images of processing analyzed to color control bar
Also it is detected with complete colouring information in region.And the region for general image inspection is enabled to complete
The detection of RGB color information becomes necessary.
Another advantageous modification of the method according to the invention is that the image detection of image detecting system is in glue herein
Occur in the case where the conveying speed at least 3m/s of printing substrate in print machine, and in printing substrate in ink-jet printer
Occur in the case where conveying speed at least 0.6m/s.Printing substrate in the printing machine monitored by image detecting system it is defeated
Sending speed is usually at least 3m/s in the case where offset press.In ink-jet printer, conveying speed currently also it is significant it is smaller (when
Before be at least 0.6m/s).The image detection that different images region is detected with the individualized image resolution ratio accordingly optimized
This image detection of system then equally must be able to detect and be handled caused by least 3m/s or 6m/s conveying speed
Image data.
Another advantageous modification of the method according to the invention is that application image detects in ink-jet printer herein
In the case where system, the printing image printed is divided into multiple images region, it respectively can with highest to these image-regions
The image resolution ratio of energy is detected in order, and is then used for the print nozzles of detection failure.The printing of failure is sprayed
Mouth will lead in the image interference in such image-region: in these image-regions, the print nozzles of failure originally should be
Through printing.Detection for the print nozzles of this image interference and then failure, this is needed in the image detection of printing image
Very high image resolution ratio.And it is needed herein using the method according to the invention, in the method according to the invention, to print
Each single region of map brushing picture is detected in order with the available image resolution ratio of highest, and then by image detecting system or
By other components, correspondingly analysis is handled.Here, these each single regions are according to priority (i.e. in turn) with the available figure of highest
As resolution ratio is detected and analyzed processing, until entire printing image and then entirely printing head width by with highest possible
Image resolution ratio test.
Another advantageous modification of the method according to the invention is herein, is used for the figure of color measuring in detection
In the case where as region, the color resolution of imaging sensor is increased to greater than 8 bits.The usual color resolution of 8 bits
It is able to achieve the color value depth of 256 color values (0 to 255) in the color region as detected by imaging sensor respectively.In face
Apply in color detection however advantageously bigger color value depth.If raising color resolution (such as compare from 8 bits to 10
It is special), then the detected color value of imaging sensor can be divided into 1024 color values (0 to 1023), this, which is able to achieve, is produced
The more accurate inspection and then preferably color control of raw color value.However, if data volume caused by thus is for rear place
It is too high for reason, then image resolution ratio can be reduced from least 50dpi to 200dpi and then save data volume.Here, however weight
It wants, so that image resolution ratio is reduced to 50dpi or less.
Another solution according to the invention of being proposed for task is a kind of image detection for page printer
System, with intraconnected measuring device (Inline-Messvorrichtung) for executing according to the method for the present invention,
It being characterized in that, imaging sensor is the CIS scan stripes or cmos camera of the modular building based on CMOS or CCD,
In, CIS scan stripes or cmos camera all parts all can in order to carry out image taking with different images resolution ratio
It controls and reads with sector mode (abschnittsweise).It is according to the invention that there is intraconnected for page printer
The image detecting system of measuring device is equipped with the CIS scan stripes of modular building, wherein be then able to individually to control for
Corresponding different image resolution ratio carries out all parts (or whole modules) of image taking.It is able to carry out whereby according to the present invention
Method, wherein different images region is detected with the image resolution ratio accordingly optimized.It alternatively can also be with application module
The cmos camera that formula can control.Modular can control expression: each single cmos sensor of cmos camera can be individualized
Ground so controls, and carries out the inspection of compartmentalization image on its entire width to the printing substrate printed so that can be realized whereby
It surveys.Be using CIS scan stripes or application cmos camera be all indifferent: importantly, modular control be able to achieve with
Different images resolution ratio carries out compartmentalization image detection.This is indicated for CIS scan stripes: these each individual modules must be thin
It divides micro-ly, makes it possible to all images region detect with the individualized image resolution ratio for the optimization attached.For
Cmos camera, this, since each single cmos sensor can control individualizedly, is not problem anyway.?
This, absolutely can to each single image region with corresponding image resolution ratio by the multiple portions of video camera, i.e. cmos sensor
It is detected with identical image resolution ratio.However, it is important that the monitoring area of cmos sensor is not so greatly, to make it possible to
Enough realize that multiple images region is only detected by such a cmos sensor with different images resolution ratio.
Another advantageous modification of image detecting system according to the invention is that image detecting system can be extremely herein
It is few that the interface criterion having changed is accepted within 20 image lines (Bildzeilen).In order to avoid the above problem (i.e. multiple figures
As region can only be detected by a part of imaging sensor with different images resolution ratio), image detecting system must be able to
It is enough that the interface criterion (namely in the form of other image resolution ratios of application) having changed is accepted within most 20 image lines.From
The undertaking of one image line to next image row is long-term goal, however can not be realized by present image sensor technology.It borrows
Help this undertaking within most 20 image linesHowever ensure: accordingly by of imaging sensor
Partially each region Hua not detected with individualized image resolution ratio.
Another advantageous modification of image detecting system according to the invention is herein, described image sensor (9)
With the sensor row (8) for being equipped with three or more Color Channels, wherein RGB sensor row (8) can be applied, these RGB
Sensor row (Sensorzeilen) is logical in three colors of three line arrangements, mixed arrangement for sensor row
Road, or by means of prism video camera, and three or more sensors can be also applied in a manner of individualized color detection
Row.For for general image inspection and especially for carrying out color measuring control by the detection of color control bar
Image detecting system application for, imaging sensor allow for detection printing image colouring information.This passes through application
Sensor row at least three Color Channels is realized.In the application of three Color Channels, such as it can be realized three RGB
Sensor row.These sensor rows can such as typically three lines (trilinear) arrangement；I.e. a sensor row detects R
Colouring information, another sensor row detects G colouring information, and another sensor row detects B colouring information.However alternative mixing
Setting be also it is possible, such as sensor row detects R colouring information herein, other two sensor row is then mixedly
Detect G and B colouring information.For RGB sensor row another option is that using plasma video camera, wherein for each of RGB
Single Color Channel is individually detected and is handled, and is then just combined again in the image procossing of the imaging sensor of postposition
At whole image.It is also furthermore possible using more than three Color Channel for more accurate color detection.In such case
Under, it, can also be using the sensor row with individualized frequency range other than RGB sensor row.However, it is also possible that
There is the Color Channel of RGB sensor row alternatively to be divided to not including.In this case, imaging sensor should be covered
The frequency range of lid is repartitioned under the applied sensor row with its Color Channel.
Detailed description of the invention
The method according to the invention and this method be functionally advantageously improved scheme referring to affiliated attached drawing according to
At least one preferred embodiment further describes.Mutual corresponding element is equipped with respective identical appended drawing reference in the accompanying drawings.It is attached
It illustrates:
Fig. 1: the printing page of the image-region with different images resolution ratio；
The functional structure of Fig. 2: CIS scan stripes；
Fig. 3: the functional structure of image detecting system；
Fig. 4: the process of the method according to the invention.
Specific embodiment
Modern image taking technology (such as the scan stripes 9 and cmos camera 9 being made of CIS sensor) has
Such electronic device, these electronic devices allow the compartmentalization of image detecting senor is different to control
(Ansteuerungen).This characteristic can be used for: according to function (set locating tab assembly, image detection or color measuring), region
Change ground and change such resolution ratio: image data is transferred to attached image processing system with the resolution ratio.In inside, sensing
Device is always run with highest resolution, however, these data be aggregated into the electronic device of this nearly sensor it is desired
Resolution ratio.This not only can be able to reality by be averaging to multi-line images pixel in the row direction but also in a column direction
It is existing.These scan stripes 9 include multiple assembly type sensor modules (> 100), these assembly type sensor modules can be by independently
It controls.These single sensor modules can also high speed (> 5m/s) operation in the case where image resolution ratio high (600dpi).
These RGB scan stripes have usually included multiple RGB sensor modules, these RGB sensor modules tool in principle
There is different electricity to control.RGB video camera with CCD technology usually only includes a small amount of RGB sensor module, these RGB sensing
Device module can individually be read.CMOS technology there is provided herein bigger possibility, however be also required to the part of sensor region
Different controls, so that these functions may be realized using more or less high cost (or must be ground as specialized configuration
Hair).
For the method according to the invention, CIS scan stripes 9 are preferably applied, which includes multiple sensor dies
Block.The example of this CIS scan stripes 9 is shown in Fig. 2 with section.It can readily see that the sensor module 8 of these scripts herein
And seeing LED 6, these LED 6 can illuminate the printing image 5 printed to be detected, and also show that in saturating
The optical device of 7 form of mirror.Directly inside scan stripes 9, signal processor 21 is also installed, these signal processors 21 are to area
Domain image data is handled, and produces digital printing image together with the signal processor of other sensors module
16.The digital printing image 16 is then transmitted to pattern process computer 15 by hardware interface 22.These CIS scan stripes 9 are excellent
Cmos sensor 8 is applied in choosing, however the application of ccd sensor is also possible, if these ccd sensors are provided about image
If power data required in terms of the speed of resolution ratio and Data Detection.For color measuring, to 50dpi to 200dpi
, the image data 3 of resolution ratio reduced shot.Only in selected image-region, to image data compared with high score
Resolution (such as 200dpi or 600dpi) is shot.It is for covering locating tab assembly that these, which have the image data compared with high image resolution,
2 (600dpi), or for the detection (200dpi) with high-resolution, such as bar code 4.
Another particularly preferred form of implementation be using cmos camera 9, as long as the cmos camera 9 be able to detect that it is whole
If a printing image 5.In the case where cmos camera 9, these single image sensors 8 can be controled, and be scanned with CIS
The case where item 9, is compared, this, which can more easily be realized, carries out image detection with compartmentalization image resolution ratio.Cmos camera 9 for
Application and indistinction of the application of the method according to the invention with CIS scan stripes 9.Cmos camera 9 controls and CIS scan stripes
The 9 above-mentioned difference controled is only in that: this needs the difference caused by construction aspect.Image detecting system 10 and according to
Method of the invention is described below using CIS scan stripes 9；However the application of cmos camera 9 is entirely equally possible
And should be included within the protection scope of the application.
Applied image detecting system 10 schematically describes in Fig. 3 herein.Image detecting system 10 is in addition to printing machine
14 except itself also comprising the CIS scan stripes 9 that are mounted in printing machine 14 and comprising pattern process computer 15, at the image
Reason computer 15 is attached directly to CIS scan stripes 9 and connect with the control computer 12 of printing machine 14.Control with display 13
Computer 12 processed is the interface for user 11 herein.CIS scan stripes 9 are typically mounted on most in 14 inside of printing machine certainly
After printing mechanism afterwards.Here, being shot to the printing image 5 to be checked.Pass through the original printed to print job
Beginning image 5 carries out image taking, produces the digital total figure of these printing zones 2,3,4 at this time as 16, is calculated by image procossing
The number total figure is then compared as 16 with the specified printing image of number during further image detection by machine 15.
Fig. 4 is schematically illustrated in the process that the method according to the invention in modification is preferably implemented.For this purpose, by computer 12,
Printing image is divided into different zones by 15 (preferably print last stage computers).These regions are corresponding to printing image 5,16
The position 2,3,4 to be checked.Then, each region 2,3,4 is associated with the figure optimized for the image detection set
As resolution ratio 19.Which image resolution ratio is optimization, this is related with the type of corresponding image detection proposed.Scheming
The example of the printing image 5 printed is shown, which has different images region 2,3,4 in printing substrate 1 in 1.
Based on printing image with its digital form, different zones with the image resolution ratio 17 attached, then
Software interface criterion 18 is established out by computer 12, which is accurately attached: in printing image 17
On which position, scan stripes 9 should detect corresponding region 2,3,4 with which kind of image resolution ratio.Software interface criterion 18 is quasi- herein
Fidelity is made: which kind of image resolution ratio applied along the direction x-/y for which image district 2,3,4 on printing image 17.Software interface is quasi-
Then 18 pattern process computer 15 for being and then transferred to image detecting system 10 by software interface by computer 12, and energy
It is enough that target accurately analysis processing is carried out with respectively selected image resolution ratio to selected image-region 2,3,4.Namely
It says, the structure for the image data 17 transmitted is related to the software interface criterion 18.Then, in the scope of image detection,
The image data 5 printed in alignment type printing is detected.Here, furthermore software interface criterion 18 is used for: reading data
When, detected image data is correctly associated with corresponding image-capturing positions again.Image with local optimum point
The result of the image detection of resolution is then able to completely as so far routinely also by output device 13 by computer 12,15
And/or printing machine 14 informs user 11.Additionally, also it is able to carry out output (or storing in the protocol).
It is had changed it is also advantageous that image detecting system 10 can be accepted rapidly (i.e. within 20 image lines)
Software interface criterion 18, the detection for printing image 5 as a result, can be realized optimally for picture material 2,3,4 as far as possible.
The advantages of the method according to the invention, is, it is generally the case that the interface 22 for image procossing, which limits, to be had
The total figure picture of high-resolution (600dpi) and transmission in the case where high speed (> 5m/s) of printing substrate feed.This
Disadvantage by only compartmentalization (i.e. locally) is overcome with high image resolution reading and transmission image-region 2,4.Only
There are those that high-resolution image-region 2,4 ability is needed to be read out with high-resolution.Have as a result, in image data transmission pre-
In the case where determining bandwidth, the boundary speed of image taking is improved, and the data volume of detected printing image 16 is dropped
As low as indispensable degree.
In contrast, disadvantage can be: biggish hardware and software expends in terms of scan stripes 9, also, in image
It may cause higher cost in the case that total figure is combined as 16 in processing to a certain extent.However, if by this
A little costs are compared (in addition, each with the cost of the installation (as being known from the state of the art) for multiple video cameras
The work of single camera must be come accurately mutually coordinated with height consuming), then the present invention is significant according to the preferred embodiment
More efficient.
Reference signs list:
1 printing substrate
2 pairs of version/register marks
3 color control bars
4 image objects (bar code)
The 5 printing images printed
6 LED for illumination
7 lens
8 sensor modules
9 CIS scan stripes
10 image detecting systems
11 users
The control computer of 12 printing machines
The display of 13 control computers
14 printing machines
15 pattern process computers
16 digital printing images
17 print image zones to be checked
18 interface criterion
19 print image zones with attached image resolution ratio
The result of 20 image detections
21 signal processors
22 hardware interfaces/hardware interface
Claims (12)
1. one kind in the machine (14) of processing printable fabric for carrying out the side of image detection by means of computer (12,15)
Method,
Wherein, it is analyzed by image data (16) of the computer (12,15) to print job, and by described image data
It is divided into the image-region (2,3,4) with different images content, different regions (2,3,4) is associated with different image point
Resolution, the image data printed (5) by means of image detecting system (10) the imaging sensor being made of each single part
(9) it shoots and analyzes,
It is characterized in that,
Each single part of described image sensor (9) can apply different image resolution ratios, and
Each single part of described image sensor can be controled by computer (15), to different image-regions with respective
The different image resolution ratios (19) attached are shot and are transmitted to described image detection system (10).
2. according to the method described in claim 1,
It is characterized in that,
The region (2,3,4) with different images content includes following image-region: described image region be used for version and
Cover locating tab assembly (2) and/or for color measuring (3) and/or for general image inspection (4).
3. according to the method described in claim 2,
It is characterized in that,
It will be used to be associated at least image resolution ratio of 200dpi to the image-region of version and set locating tab assembly (2),
The image-region for being used for color measuring (3) is associated at least image resolution ratio of 50dpi, and
For the readable numeric data code of inspection machine, such as bar code, the image-region for being used for general image inspection (4) is attached
In at least image resolution ratio of 200dpi, and in order to check that other regions are then associated at least image resolution ratio of 100dpi.
4. method according to one of the above claims,
It is characterized in that,
Computer (12) establishes out interface criterion (18), the boundary based on the image data of the image-region (19) with different resolutions
Described image region (2,3,4) are associated with respective image camera site by face criterion, send described image region to the figure
As detection system (10), described image detection system controls each single part of described image sensor (9), so as to each list
A image-region is analyzed and processed with the image resolution ratio (19) respectively attached.
5. method according to one of the above claims,
It is characterized in that,
Each single part of described image sensor (9) is controled, thus, for the figure detected with reduced image resolution ratio
As region (3,4), image information is weighted to a pixel from multiple pixels.
6. method according to one of the above claims,
It is characterized in that,
Image-region (2,3,4) with different images resolution ratio is read out with complete RGB color information.
7. method according to one of the above claims,
It is characterized in that,
The image detection of described image detection system (10) is in offset press the conveying speed at least 3m/s's of printing substrate (1)
In the case of occur, and occur in the case where the conveying speed at least 0.6m/s of printing substrate in ink-jet printer.
8. method according to one of the above claims,
It is characterized in that,
In ink-jet printer in the case where application image detection system (10), the printing image printed is divided into multiple figures
As region, described multiple images region is carried out with highest possible image resolution ratio in order respectively by imaging sensor (9)
Detection, and it is subsequently applied to the print nozzles of detection failure.
9. method according to one of the above claims,
It is characterized in that,
In the case where detection is used for the image-region of color measuring (3), the color resolution of imaging sensor (9) is increased to
Greater than 8 bits.
10. image detecting system (10) of the one kind for page printer (14) is used for intraconnected measuring device (9)
Method according to one of the above claims is executed,
It is characterized in that,
Described image sensor (9) is the CIS scan stripes or cmos camera of the modular building based on CMOS or CCD
(9), wherein CIS scan stripes (9) or cmos camera (9) all parts with sector mode can control and
It reads, for carrying out image taking with different images resolution ratio.
11. image detecting system (10) according to claim 10,
It is characterized in that,
Described image detection system (10) can accept the interface criterion (18) having changed within most 20 image lines.
12. image detecting system described in 0 or 11 (10) according to claim 1,
It is characterized in that,
Described image sensor (9) has the sensor row (8) for being equipped with three or more Color Channels, wherein can apply
RGB sensor row (8), the RGB sensor row be for sensor row in three line arrangements, mixed arrangement three
Color Channel, or by means of prism video camera, and also can be in a manner of individualized color detection using three or more
Sensor row.
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|---|---|---|---|
| DE102017213262.0 | 2017-08-01 | ||
| DE102017213262.0A DE102017213262B4 (en) | 2017-08-01 | 2017-08-01 | Image acquisition with area-by-area image resolution |
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| CN109324055A true CN109324055A (en) | 2019-02-12 |
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| CN201810864399.6A Pending CN109324055A (en) | 2017-08-01 | 2018-08-01 | Image detection with compartmentalization image resolution ratio |
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| DE (1) | DE102017213262B4 (en) |
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| DE102017213262B4 (en) | 2022-09-22 |
| DE102017213262A1 (en) | 2019-02-07 |
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