CN106708449A - Anti copy method based on negative color image watermark in monochrome printing - Google Patents
Anti copy method based on negative color image watermark in monochrome printing Download PDFInfo
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- CN106708449A CN106708449A CN201611268150.6A CN201611268150A CN106708449A CN 106708449 A CN106708449 A CN 106708449A CN 201611268150 A CN201611268150 A CN 201611268150A CN 106708449 A CN106708449 A CN 106708449A
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/12—Digital output to print unit, e.g. line printer, chain printer
- G06F3/1201—Dedicated interfaces to print systems
- G06F3/1202—Dedicated interfaces to print systems specifically adapted to achieve a particular effect
- G06F3/1203—Improving or facilitating administration, e.g. print management
- G06F3/1208—Improving or facilitating administration, e.g. print management resulting in improved quality of the output result, e.g. print layout, colours, workflows, print preview
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/12—Digital output to print unit, e.g. line printer, chain printer
- G06F3/1201—Dedicated interfaces to print systems
- G06F3/1202—Dedicated interfaces to print systems specifically adapted to achieve a particular effect
- G06F3/1211—Improving printing performance
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/12—Digital output to print unit, e.g. line printer, chain printer
- G06F3/1201—Dedicated interfaces to print systems
- G06F3/1223—Dedicated interfaces to print systems specifically adapted to use a particular technique
- G06F3/1237—Print job management
- G06F3/1241—Dividing a job according to job requirements, e.g. black/white and colour pages, covers and body of books, tabs
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/12—Digital output to print unit, e.g. line printer, chain printer
- G06F3/1201—Dedicated interfaces to print systems
- G06F3/1278—Dedicated interfaces to print systems specifically adapted to adopt a particular infrastructure
- G06F3/128—Direct printing, e.g. sending document file, using memory stick, printing from a camera
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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
- G06T1/0021—Image watermarking
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- General Physics & Mathematics (AREA)
- Human Computer Interaction (AREA)
- General Engineering & Computer Science (AREA)
- Quality & Reliability (AREA)
- Editing Of Facsimile Originals (AREA)
- Image Processing (AREA)
Abstract
The invention relates to an anti copy method based on a negative color image watermark in monochrome printing. The method comprises the steps of designing and producing a watermark pattern bitmap, conducting negative color overlay operation to an original text and the watermark pattern locally, directly transmitting the overlaid combined file to a printing module for normal printing. A printing drive program conducts bitmap processing of the inputted original text. During the negative color overlaying with a pre-loaded watermark pattern bitmap, the watermark resolution shall refer to the resolution of the original text watermark pattern bitmap as the benchmark, conducting equal ratio scaling of the watermark pattern bitmap to let the resolution match before the overlaying based on the negative color. After the overlaying, a bitmap containing the compounded watermark pattern bitmap which is used is generated and outputted. The printing module conducts the printing operation to the received final printing output file, this process is identical with traditional printing process. The method achieves that the compatibility with traditional printing equipment is largely guaranteed, the difficulty of achieving the method is reduced, and the printed result is the file with watermarks based on negative colors, and therefore the protection of the use safety of the original text is effectively enhanced.
Description
Technical field
A kind of anti-copy method the present invention relates to be based on negative color image watermark in monochromatic printing, more particularly to government,
The fields such as enterprise, business, it is adaptable to unauthorized printer, user in the environment higher that the protection of paper delivery medium sensitive documents is required
Strick precaution.
Background technology
Traditionally on paper file is after printing and making, it is impossible to which the effective document that solves is unauthorized copying, or nothing after duplication
The problems such as method clear and definite copyright information.Occur in that the printing superimposing technique based on watermark, bar code superposition on the market for problem above
Watermark information is remained in original paper by the technology such as technology and digital watermarking protection, above technology with gray level printing as Main Means
In self defined area, this method can only play the effect of being effectively protected to original paper, but manner discussed above exist it is following
Problem：(1) conventional watermark (is schemed by by figure or word with the Gray-level Watermarking template of current character color depth 30%~70%
In 4 4.1), template is added to below word and is shown, which is commonly used.Due to watermark because ink amount is less than text
Character segment, and color is shallower, so the None- identified that even desalinate that will be thickened along with watermark after the multiple duplicating of original copy, from
And lose the protective effect to original copy；(2) although bar code superimposing technique still is able to clear identification after repeatedly duplicating, bar code must
Document blank position (4.3 in Fig. 4) must be printed upon, if superposition is in the body of the email, the readability and bar code of original text will be had a strong impact on
Identifiability, therefore this watermark protection duplicate when cannot prevent user from being covered to its bar code after duplicate；(3) numeral
Watermark superposition technology faces same problem with conventional watermark, its be hidden in the digital watermarking in original copy by repeatedly duplicate after,
Digital watermarking, and digital watermarking algorithm technical sophistication finally cannot be accurately extracted, implementation cost is higher, only original paper be protected and is imitated
Fruit is preferably.(4) process of tradition addition watermark is not analyzed to original text word, if using consistent with word ink amount depth
Watermark recovery, it is easy to excessively covered word, influences the readability of original text.
In sum, under in the urgent need to a kind of lower cost, it is still able to show water after repeatedly being duplicated for paper document
The simple and easy method of print, is effectively ensured integrality and reliability of the paper document watermark in copying process.
The content of the invention
The technology of the present invention solve problem：Overcome the deficiencies in the prior art, there is provided one kind is applied to be based on bearing in monochromatic printing
The anti-copy method of color image watermark, by the algorithm being superimposed using negative color watermarking images, realizes watermark color depth and word
Foreground is identical (4.2 in Fig. 4).The method ensure original text readability on the premise of, it is ensured that paper delivery medium document after duplicating, water
The readability of print is consistent with word all the time, and watermark does not disappear because multiple duplicating color is thin out, is finally reached document complete
The high robust of life cycle protection.
The technology of the present invention solution：Anti-copy method based on negative color image watermark in monochrome printing, step is as follows：
S11 makes the watermark recovery bitmap for being applied to this technology, watermark figure using computer or the form design of Freehandhand-drawing
Pattern bitmap initial resolution should be consistent with default print resolution ratio, is so easy to computing during bitmap additive process (2.6 in Fig. 2)
Simplify, improve efficiency and reduce printing interval.
After being equipped with related print driver, after locally operation (2.6 in Fig. 2) is overlapped to original text and watermark figure,
Composite document is directly transferred into print module (2.7 in Fig. 2) carries out normal print (2.8 in Fig. 2).It is such to be advantageous in that not
Watermark recovery is remained in printing device, to avoid watermark information from leaking.
The original text of input can be carried out bitmapped treatment by the print driver involved by S12, by itself and the water being preloaded into
Impression pattern bitmap carries out the superposition based on negative color (2.6 in such as Fig. 2).If resolution ratio is inconsistent, with original text bitmap resolution ratio
On the basis of, watermark recovery bitmap is carried out into equal proportion scaling (2.5 in such as Fig. 2, having narration under Zoom method), make watermark recovery position
The superposition based on negative color is carried out again after figure matching original text bitmap (2.6 in such as Fig. 2).Output synthesis bitmap used is generated after superposition
(4.2 in Fig. 4), and it is transferred to print module (2.7 in such as Fig. 2).
Printing (such as Fig. 2 that S13 print modules are carried out to the final printout file (synthesis bitmap) for being received
In 2.8) with traditional prints process indifference.This causes that this technology and the compatibility of conventional printer obtain very big guarantee, reduces
Difficulty is realized, and the result for printing is the band watermark file based on negative color, the safety in utilization to original text is protected.
S11 makes watermark recovery bitmap using computer or the form design of Freehandhand-drawing, and watermark recovery initial resolution should
It is consistent with default print resolution ratio, it is easy to computing during watermark recovery bitmap additive process to simplify, improve efficiency and reduce printing week
Phase；And related printing driving is equipped with, the overlap-add operation based on negative color is locally being carried out to original text and watermark recovery, after superposition
Direct file transfer to print module carries out normal print, so as not to remain watermark recovery in printing device, it is to avoid watermark information
Leak；
The source language message of input is carried out bitmapped treatment by S12 print drivers, by this original text bitmap be preloaded into
Watermark recovery bitmap carries out the superposition based on negative color, if resolution ratio is inconsistent, on the basis of original text pattern bitmap resolution ratio,
Watermark recovery bitmap is carried out into equal proportion scaling, is carried out again after watermark recovery bitmap is matched with original text bitmap based on the folded of negative color
Plus, output synthesis watermark recovery bitmap used is generated after superposition, and be transferred to print module；
The printing that S13 print modules are carried out to the final printout file for being received, with traditional prints process
Indifference, this causes that this technology obtains very big guarantee with the compatibility of conventional printing apparatus, reduces and realize difficulty, and the knot for printing
Fruit is the band watermark file based on negative color, and the safety in utilization to original text is protected.
In the step S11 and S12, need to use template when watermark recovery is used, the format design of template and its silent
Recognize parameter setting, it is A4,300dpi, default resolution 2480*3508 to commonly use breadth.
In the step S11 and S12, the additive process based on negative color is as follows：By original text bitmap (according to 3.1 name rule
Then institute is into bitmap) with watermark recovery bitmap (according to 3.2 naming rules institute into bitmap), XOR is carried out to footmark identical point
Treatment, corresponding points a ⊕ b are stored in synthesis bitmap, 3.3 (i.e. a in such as Fig. 3nm⊕bnm) it is the synthesis generated by a position stack result
Bitmap (Fig. 4 4.2), is transferred to print module during 2.7 in fig. 2.
During to by occurring mismatching in a position additive process, treatment is zoomed in and out to watermark recovery bitmap, process is as follows:Such as
Fruit original text format length-width ratio is identical with watermark template length-width ratio, then on the basis of diagonal, equal proportion stretches or shrink watermark,
Make that it is identical with original text resolution ratio and position keeps constant as far as possible.If original text format length-width ratio is with watermark template length-width ratio not
Together, should clip zoom in and out treatment again after the length or wide portion being more than in watermark figure.
Generated containing the file based on negative color image watermark, will not because of repeatedly duplicate and desalinate watermark effect, drop
The low identification to watermark in original text.
This method is applied to monochrome paper delivery medium and is based on negative color image watermark printing scene.
The suitable word that is equally applicable to of this method is for single color, and background is single color based on negative color image watermark
Print scene.
The present invention is not limited only to the usage scenario of printer, also duplicates all-in-one, duplicator class including other scanning and printings
Type paper delivery medium output equipment.
The present invention has the following advantages that compared with prior art：
(1) because of not gray level printing, print content is non-black i.e. white, so watermark definition does not change with number of times is duplicated
Become, the term of validity and the original text survival phase of watermark are consistent.Avoid relying on the method for repeatedly duplicating removal watermark.
(2) watermark does not cause that original text is covered mutually with watermark, therefore word content individuality is not in itself to be hidden
The effect covered, thus keep readability higher.
(3) implementation difficulty is low, not only preferable to original, still has high robust after repeatedly duplicating.
(4) relatively low to printing device requirement, institute's message in-coming part task is identical with task with traditional.
Brief description of the drawings
Fig. 1 is solution schematic diagram of the invention；
Fig. 2 realizes flow chart for the present invention；
Fig. 3 is superposition XOR algorithmic procedure；
Comparative examples figure is realized in Fig. 4 watermarks.
Specific embodiment
Bitmapped in the present invention is described as：Original text bitmap+watermark recovery bitmap=synthesis bitmap
Conventional description：Original text+watermark
Printing device：Refer to output equipment
Print driver：It is responsible for the program of additive process
Print module：Refer to output par, c general name.
As shown in figure 1, the present invention to implement step as follows：
In S11 (Fig. 1) stages, used as preparatory process, the acquiescence watermark figure to being overlapped carries out engineer.The watermark
Default design parameter should be determined according to conventional printing content breadth because conventional breadth is A4,300dpi, so acquiescence watermark
According to resolution ratio 2480*3508 for condition is made, content is monochrome.When watermark recovery bitmap and original text bitmap resolution ratio
Timing, additive process (2.6 in Fig. 2) meeting more simple and effective.
After being equipped with related print driver, after locally operation (2.6 in Fig. 2) is overlapped to original text and watermark figure,
Composite document is directly transferred into print module (2.7 in Fig. 2) carries out normal print (2.8 in Fig. 2).It is such to be advantageous in that not
Watermark recovery is remained in printing device, to avoid watermark information from leaking.
In S12 (Fig. 1) stages, the 2.1 of Fig. 2 is to be not added with watermark original text to enter addition watermark from printing Driver Entry input
Flow, bitmapped treatment is carried out to original text in 2.2 stages, become dot array data file.Then according to a position to this point
Battle array data file carries out assignment storage, as shown in figure 3,3.1 parts take 2 × 2 pixel maps of part, each point by the original text upper left corner
Position anmContainer is assigned that (n is row name, and integer is incremented by since 0；M is row name, and integer is incremented by since 0).Citing, the third line
4th is classified as a23.Whether assignment content is that black is assigned to 1 or 0 (black is 1, and white is for 0) according to place pixel.
2.3 is that in print driver, the original text bitmap after watermark recovery bitmap is loaded into 2.2 enters simultaneously in Fig. 2
Entering during 2.4 printings drive carries out matching contrast, and the watermark recovery bitmap of this when should be with 3.2 partially patterned patterns one in Fig. 3
Cause, carry out dot array data treatment, 3.2 take local 2 × 2 pixel maps, naming rule b by the watermark recovery bitmap upper left cornernmWith
A mentioned abovenmUnanimously.
In fig. 2 in 2.4 contrast, if artwork is identical with watermark figure resolution ratio, can be by original text bitmap and watermark recovery
Bitmap is sent directly into 2.6 processes.
In fig. 2 in 2.4 contrast, if artwork is differed with watermark figure resolution ratio, by watermark recovery bitmap in 2.5
Equal proportion scaling is carried out according to original text bitmap resolution ratio, Zoom method is as follows：
If original text format length-width ratio is identical with watermark template length-width ratio, on the basis of diagonal, equal proportion stretching or
Person shrinks watermark, makes that it is identical with original text resolution ratio and watermark superposition segments relative positions keep constant as far as possible.
If original text format length-width ratio is different from watermark template length-width ratio, the length or portion wide being more than in watermark figure should be clipped
Dividing makes its length-width ratio identical, zooms in and out treatment again afterwards.Make it identical with original text resolution ratio and the relative position in watermark superposition part
Put and keep as far as possible constant.
This process makes watermark recovery bitmap generate the preparation figure with original text equal resolution, into 2.6 (Fig. 2) processes.
Additive process (adjustment position here) is as shown in figure 3, by original text bitmap (according to 3.1 naming rules institute into bitmap)
With watermark recovery bitmap (according to 3.2 naming rules institute into bitmap), XOR treatment is carried out to footmark identical point, corresponding points
A ⊕ b are stored in synthesis bitmap, and now following four situation occurs in summing point, specific processing method and are explained as follows：
A () works as a=0；B=0.A ⊕ b=0.Artwork white point correspondence watermark figure white point, is superimposed as white point.
B () works as a=1；B=0.A ⊕ b=1.Artwork white point correspondence watermark figure stain, is superposed to stain.
C () works as a=0；B=1.A ⊕ b=1.Artwork stain correspondence watermark figure white point, is superposed to stain.
D () works as a=1；B=1.A ⊕ b=0.Artwork stain correspondence watermark figure stain, is superposed to white point.
Such as 3.3 (i.e. a in Fig. 3nm⊕bnm) it is after being superimposed by a synthesis bitmap (4.2 in Fig. 4) of position stack result generation
Actual effect such as Fig. 4 in 4.2.
Output synthesis bitmap (4.2 parts in effect such as Fig. 4) used is generated after superposition, and is transferred to print module (such as Fig. 2
In 2.7).
In S13 (Fig. 1) stages
In Fig. 2 processes 2.8, the pattern of the print command received by print module is consistent with the pattern of traditional prints,
This causes that the compatibility of this technology and conventional printer obtains very big guarantee, and difficulty is realized in reduction, and the result for printing be based on
The band watermark file of negative color.The output result combines original text together with watermark, and print procedure is finished immediately, realizes
Protection to the safety in utilization of original text.And printing device does not record watermark information, it is to avoid water caused by watermark information leakage
The original text for printing protection is cracked situation.
The content not being described in detail in description of the invention belongs to prior art known to professional and technical personnel in the field.
The above is only the preferred embodiment of the present invention, it is noted that come for one of ordinary skill in the art
Say, under the premise of principle of the invention is not departed from, can also make some improvements and modifications, these improvements and modifications also should be regarded as
Protection scope of the present invention.
Claims (8)
1. based on the anti-copy method for bearing color image watermark in a kind of monochromatic printing, it is characterised in that step is as follows：
S11 designs and produces watermark recovery bitmap using the mode of computer or Freehandhand-drawing, and watermark recovery bitmap initial resolution should
It is consistent with default print resolution ratio；And related printing driving is equipped with, the superposition behaviour based on negative color is carried out to original text and watermark recovery
Make, by the direct file transfer after superposition to the step S12 print drivers；
The source language message of input is carried out bitmapped treatment by S12 print drivers, by this original text bitmap and the watermark being preloaded into
Pattern bitmap carries out the superposition based on negative color, if resolution ratio is inconsistent, on the basis of original text pattern bitmap resolution ratio, by water
Impression pattern bitmap carries out equal proportion scaling, watermark recovery bitmap is carried out being superimposed based on negative color again with after the matching of original text bitmap,
Output synthesis watermark recovery bitmap used is generated after superposition, and is transferred to the step S13 print modules；
The printing that S13 print modules are carried out to the final printout file for being received, the result of printing is based on negative
The band watermark file of color, this with watermark file by repeatedly duplicate after watermark it is always consistent with the color depth of text,
Realize protecting the safety in utilization of watermark in original text.
2. based on the anti-copy method for bearing color image watermark in monochromatic printing according to claim 1, it is characterised in that：
In the step S11 and S12, need to use the format design and its default parameters of template, template to set when watermark recovery is used,
Conventional breadth is A4,300dpi, default resolution 2480*3508.
3. based on the anti-copy method for bearing color image watermark in monochromatic printing according to claim 1, it is characterised in that：
In the step S11 and S12, the additive process based on negative color is as follows：It is identical to footmark by original text bitmap and watermark recovery bitmap
Point carry out XOR treatment, corresponding points a ⊕ b are stored in synthesis bitmap, are the synthesis position generated by a position stack result
Figure.
4. based on the anti-copy method for bearing color image watermark in monochromatic printing according to claim 3, it is characterised in that：It is right
During by occurring mismatching in a position additive process, treatment is zoomed in and out to watermark recovery bitmap, process is as follows:If original text format
Length-width ratio is identical with watermark template length-width ratio, then on the basis of diagonal, equal proportion stretches or shrink watermark, makes itself and original text
Resolution ratio is identical and position keeps constant as far as possible, if original text format length-width ratio is different from watermark template length-width ratio, should clip
Treatment is zoomed in and out again after the length or wide portion that are more than in watermark figure.
5. existed based on the anti-copy method for bearing color image watermark, its feature in a kind of monochromatic printing according to claim 1
In：In the step S12, generated containing the file based on negative color image watermark, will not because of repeatedly duplicate and desalination water
Print effect, reduces the identification to watermark in original text.
6. existed based on the anti-copy method for bearing color image watermark, its feature in a kind of monochromatic printing according to claim 1
In：Methods described is applied to monochrome paper delivery medium and is based on negative color image watermark printing scene.
7. existed based on the anti-copy method for bearing color image watermark, its feature in a kind of monochromatic printing according to claim 1
In：The suitable word that is equally applicable to of methods described is for single color, and background being beaten based on negative color image watermark for single color
Print scene.
8. existed based on the anti-copy method for bearing color image watermark, its feature in a kind of monochromatic printing according to claim 1
In：Methods described is not limited only to the usage scenario of printer, also duplicates all-in-one, duplicator type paper including other scanning and printings
Medium output equipment.
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| CN201611268150.6A CN106708449B (en) | 2016-12-31 | 2016-12-31 | negative color image watermark-based anti-copying method in monochrome printing |
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| CN201611268150.6A CN106708449B (en) | 2016-12-31 | 2016-12-31 | negative color image watermark-based anti-copying method in monochrome printing |
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| CN106708449B CN106708449B (en) | 2019-12-17 |
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| JP2020026064A (en) * | 2018-08-10 | 2020-02-20 | キヤノン株式会社 | Printer, control method and program |
| CN112000303A (en) * | 2020-08-26 | 2020-11-27 | 杭州网易再顾科技有限公司 | Processing method and device capable of realizing watermark printing, electronic equipment and storage medium |
| CN112445437A (en) * | 2020-11-04 | 2021-03-05 | 珠海奔图电子有限公司 | Image forming method and apparatus |
| CN113135043A (en) * | 2021-03-10 | 2021-07-20 | 厦门喵宝科技有限公司 | Watermark printing method of thermal printer, storage medium and thermal printing equipment |
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| CN113135043A (en) * | 2021-03-10 | 2021-07-20 | 厦门喵宝科技有限公司 | Watermark printing method of thermal printer, storage medium and thermal printing equipment |
| CN113135043B (en) * | 2021-03-10 | 2022-06-24 | 厦门喵宝科技有限公司 | Watermark printing method of thermal printer, storage medium and thermal printing equipment |
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