CN108667462A - Position encoded coding/decoding method and device - Google Patents
Position encoded coding/decoding method and device Download PDFInfo
- Publication number
- CN108667462A CN108667462A CN201710215046.9A CN201710215046A CN108667462A CN 108667462 A CN108667462 A CN 108667462A CN 201710215046 A CN201710215046 A CN 201710215046A CN 108667462 A CN108667462 A CN 108667462A
- Authority
- CN
- China
- Prior art keywords
- position encoded
- unit
- code
- information
- coding
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000000034 method Methods 0.000 title claims abstract description 29
- 239000000758 substrate Substances 0.000 claims abstract description 20
- 239000000284 extract Substances 0.000 claims abstract description 13
- 238000012800 visualization Methods 0.000 claims abstract description 10
- 238000012937 correction Methods 0.000 claims description 16
- 238000000605 extraction Methods 0.000 claims description 9
- 238000012545 processing Methods 0.000 claims description 9
- 230000006870 function Effects 0.000 description 7
- 238000010586 diagram Methods 0.000 description 6
- 239000011159 matrix material Substances 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000013079 data visualisation Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000010365 information processing Effects 0.000 description 1
- 238000013178 mathematical model Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000000644 propagated effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 230000000153 supplemental effect Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
- H03M7/00—Conversion of a code where information is represented by a given sequence or number of digits to a code where the same, similar or subset of information is represented by a different sequence or number of digits
- H03M7/02—Conversion to or from weighted codes, i.e. the weight given to a digit depending on the position of the digit within the block or code word
- H03M7/04—Conversion to or from weighted codes, i.e. the weight given to a digit depending on the position of the digit within the block or code word the radix thereof being two
Landscapes
- Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Image Processing (AREA)
Abstract
The present embodiments relate to a kind of position encoded coding/decoding method and device, method includes：Position encoded image is obtained on position encoded substrate；Extract position encoded characteristic information；It is position encoded imparting numerical characteristic value according to characteristic information, obtains position encoded numerical characteristic sequence；Position encoded location information is determined according to numerical characteristic sequence；Position encoded corresponding data are decoded according to location information, to obtain the corresponding visualization file of data.
Description
Technical field
The present invention relates to technical field of information processing more particularly to a kind of position encoded coding/decoding methods and device.
Background technology
With the rapid development of information technology, people are increasingly commonly produced, are handled, exchanged and propagated using computer
Various forms of information.Information technology gradually changes the traditional living habit of people.Traditional utilizes paper and pen into running hand
The mode write can not carry out information process-, therefore cannot be satisfied the needs of people.
In the prior art, certain type of information is embedded in such as paper page, board or equivalent using coding pattern
Substrate in.For example, can be the human-readable embedded machine for extending substrate function of graphical information supplement in substrate
Readable information.This embedding information may include for graphical information, order, supplemental text or image, hyperlink, absolute position
Deng the file data completely or partially rebuild.It then, can using the scanner of programming, facsimile machine, camera or digital pen
With reading, rebuild and using the local information being embedded into substrate.However when being read out and decoding to information, it is easy out
The problem of existing None- identified or identification inaccuracy, affects the output of coding corresponding data.Therefore, how to embedding information into
Row efficiently and accurately decodes, to which the corresponding data of exports coding become problem to be solved.
Invention content
The object of the present invention is to provide a kind of position encoded coding/decoding methods and device, to solve in the prior art to information
When being read out and decoding, it is susceptible to None- identified or identification is inaccurate, the problem of influencing to encode the output of corresponding data.
To achieve the above object, on the one hand, the present invention provides a kind of position encoded coding/decoding method, the method packets
It includes：
First terminal obtains position encoded image on position encoded substrate；
Extract the position encoded characteristic information；
It is the position encoded imparting numerical characteristic value according to the characteristic information, it is special obtains the position encoded number
Levy sequence；
The position encoded location information is determined according to the numerical characteristic sequence；
The position encoded corresponding data are decoded according to the positional information, are corresponded to obtain the data
Visualization file.
Further, it is described it is position encoded specifically include dot code, the extraction position encoded characteristic information
It specifically includes：
Extract the angle information that adjacent dot code line is formed with reference axis.
Further, the method further includes:
The multiple code units being made of dot are obtained, the code unit includes multigroup adjacent dot code line
The position encoded unit that midpoint line limits.
Further, the method further includes:
Detect the rotation angle of the code unit；
Correction angle is generated according to the rotation angle；
Processing is corrected to the code unit according to the correction angle.
On the other hand, the present invention provides a kind of position encoded decoding apparatus, described device includes：
First acquisition unit, for obtaining position encoded image on position encoded substrate；
Extraction unit, for extracting the position encoded characteristic information；
Assignment unit obtains institute's rheme for being the position encoded imparting numerical characteristic value according to the characteristic information
Set the numerical characteristic sequence of coding；
Second acquisition unit, for according to location information position encoded described in the numerical characteristic retrieval；
Decoding unit, for being decoded according to the positional information to the position encoded corresponding data, to
To the corresponding visualization file of the data.
Further, it is described it is position encoded specifically include dot code, the extraction unit is specifically used for：
Extract the angle information that adjacent dot code line is formed with reference axis.
Further, described device further includes third acquiring unit, for obtaining the multiple code units being made of dot,
The code unit includes the position encoded unit that the midpoint line of multigroup adjacent dot code line limits.
Further, described device further includes correction unit, the rotation angle for detecting the code unit；
Correction angle is generated according to the rotation angle；
Processing is corrected to the code unit according to the correction angle.
Position encoded coding/decoding method and device provided in an embodiment of the present invention, obtain on position encoded substrate
Position encoded image；Extract position encoded characteristic information；It is position encoded imparting numerical characteristic value according to characteristic information, obtains
Position encoded numerical characteristic sequence；Position encoded location information is determined according to numerical characteristic sequence；According to location information pair
Position encoded corresponding data are decoded, to obtain the corresponding visualization file of data.Position provided in an embodiment of the present invention
The coding/decoding method and device of coding are set, decoding accuracy rate is high, is easy to implement the output of coding corresponding data.
Description of the drawings
Fig. 1 is the flow chart of position encoded coding/decoding method provided in an embodiment of the present invention；
Fig. 2 is dot matrix coding schematic diagram provided in an embodiment of the present invention；
Fig. 3 is dot matrix coding schematic diagram provided in an embodiment of the present invention；
Fig. 4 is code unit schematic diagram provided in an embodiment of the present invention；
Fig. 5 is the rotation angle schematic diagram of code unit provided in an embodiment of the present invention；
Fig. 6 is the schematic diagram of position encoded decoding apparatus provided in an embodiment of the present invention.
Specific implementation mode
To make the objectives, technical solutions, and advantages of the present invention clearer, below in conjunction with attached drawing to the present invention make into
It is described in detail to one step, it is clear that the described embodiments are only some of the embodiments of the present invention, rather than whole implementation
Example.Based on the embodiments of the present invention, obtained by those of ordinary skill in the art without making creative efforts
All other embodiment, shall fall within the protection scope of the present invention.
Fig. 1 is the flow chart of position encoded coding/decoding method provided in an embodiment of the present invention.As described in Figure, the present embodiment carries
The method of confession includes：
Step 101, first terminal obtains position encoded image on position encoded substrate.
Wherein, first terminal can be specifically to have the identification equipment of Image Acquisition and processing function, such as digital pen.Number
The pen tip of code pen moves on position encoded substrate, the image capture module tracking acquisition written handwriting warp in digital pen
Processor is sent to after the position encoded image crossed to be handled.
Substrate specifically includes writing paper, blank, electronic display etc..In substrate have it is position encoded, first terminal is in base
Input data while the reading position coding of ground, is decoded input data by reading position coding.
First terminal can also be the terminal device with processing function, for example, desktop computer, laptop, tablet
Computer, smart mobile phone etc..In the present embodiment, if first terminal does not have for computer etc. directly tracks acquisition position in substrate
When the equipment of the function of coded image, need to obtain position encoded image by identification equipments such as digital pens, and be converted to number
Signal is handled for computer.
Step 102, the position encoded characteristic information is extracted.
Optionally, position encoded to specifically include dot code, it extracts position encoded characteristic information and specifically includes：Extract phase
The angle information that adjacent dot code line is formed with reference axis.
In a specific embodiment, as shown in figure 3, the angle that four groups of dot codes and x-axis positive axis are formed is made
It is characterized information, respectively：Pi/2,0, π/4,3 π/4.
It should be noted that this step can also be according to the angle information that origin code line and y-axis are formed as feature
Information, or relevant mathematical model is established, position encoded characteristic information is extracted according to other directional informations.
Step 103, it is the position encoded imparting numerical characteristic value according to the characteristic information, obtains described position encoded
Numerical characteristic sequence.
It is that position encoded imparting number is special according to characteristic information specifically, analyzing position encoded characteristic information
Value indicative obtains numerical characteristic sequence for read whole is position encoded, and each element in numerical characteristic sequence is a pair
The numerical characteristic value of adjacent origin code.
Such as the example in step 102, it is respectively for such as the characteristic information in Fig. 3：Pi/2, four groups of dots of 0, π/4,3 π/4
Code assigns numerical characteristic value：00、01、10、11.
Can be respectively that eight groups of dot codes in Fig. 4 such as assign numerical characteristic value in another specific embodiment：
000、001、010、011、100、101、110、111。
It should be noted that being that position encoded imparting numerical characteristic value namely will be position encoded corresponding defeated in this step
It is corresponding numerical characteristic value to enter digital independent.It can also be with it other than assigning the mode of numerical characteristic value in example above
His mode assigns digital special increment, it is therefore an objective to handle the position encoded Serial No. that is converted to.
Step 104, the position encoded location information is determined according to the numerical characteristic sequence.
The position encoded and numerical characteristic sequence of the different zones of the different pages is established into correspondence, reading position in advance
It can be according to numerical characteristic sequence queries to corresponding location information when coding.Location information can be the specific of the specific page
Region.
Step 105, the position encoded corresponding data are decoded according to the positional information, it is described to obtain
The corresponding visualization file of data.
After determining position encoded location information according to numerical characteristic sequence, it can be exported when reading position encodes pair
The visualization file answered carries out output and shows.
Wherein, visualization file includes:Text, picture, video and audio file etc..
In addition, technical solution of the present invention further includes:The multiple code units being made of dot are obtained, code unit includes more
The position encoded unit that the midpoint line of the adjacent dot code line of group limits.
As shown in figure 4, dot code midpoint C1, C2, C3, C4 line Lx1, Lx2, Ly1, Ly2 define a code list
First D.Can be using code unit D as a reading unit, or using multiple code unit D as a reading unit, work as reading
When getting the unit, the corresponding text of the unit, picture, video and audio file etc. are exported.
Technical solution of the present invention further includes the steps that correction：Detect the rotation angle of code unit；It is given birth to according to rotation angle
At correction angle；Processing is corrected to code unit according to correction angle.
When substrate is not at horizontally or vertically position, the code unit of position encoded formation will produce a rotation angle
Degree reads code and will produce decoding inaccurate problem when decoding corresponding data, it is therefore desirable to it is laggard to be corrected processing
Row decoding.
As shown in figure 5, reference line is the straight line of horizontal direction, the angle theta of reference line and straight line Lx1 are code unit
Rotation angle, the angle by detecting straight line Lx1 is able to detect that the rotation angle of code unit, according to rotation angle to generation
Code unit is corrected, to realize accurate decoding.
Position encoded coding/decoding method provided in an embodiment of the present invention is compiled with acquisition position in position encoded substrate
Code image；Extract position encoded characteristic information；It is position encoded imparting numerical characteristic value according to characteristic information, obtains position volume
The numerical characteristic sequence of code；Position encoded location information is determined according to numerical characteristic sequence；Position is compiled according to location information
The corresponding data of code are decoded, to obtain the corresponding visualization file of data.It is provided in an embodiment of the present invention position encoded
Coding/decoding method, decoding accuracy rate is high, is easy to implement the output of coding corresponding data.
Fig. 6 is the schematic diagram of position encoded decoding apparatus provided in an embodiment of the present invention.As shown, device includes:
First acquisition unit 1, extraction unit 2, assignment unit 3, second acquisition unit 4, decoding unit 5.
First acquisition unit 1 obtains position encoded image for first terminal on position encoded substrate；
Extraction unit 2, for extracting the position encoded characteristic information；
Assignment unit 3 obtains institute's rheme for being the position encoded imparting numerical characteristic value according to the characteristic information
Set the numerical characteristic sequence of coding；
Second acquisition unit 4, for according to location information position encoded described in the numerical characteristic retrieval；
Decoding unit 5, for being decoded according to the positional information to the position encoded corresponding data, to
To the corresponding visualization file of the data.
Optionally, position encoded to specifically include dot code, extraction unit 2 is specifically used for：
Extract the angle information that adjacent dot code line is formed with reference axis.
Optionally, device further includes third acquiring unit, for obtaining the multiple code units being made of dot, code list
Member includes the position encoded unit that the midpoint line of multigroup adjacent dot code line limits.
Optionally, device further includes correction unit, the rotation angle for detecting the code unit；According to the rotation
Angle generates correction angle；Processing is corrected to the code unit according to the correction angle.
The specific work process of each unit of position encoded decoding apparatus provided in an embodiment of the present invention and preceding rheme
The coding/decoding method embodiment for setting coding corresponds, and has been carried out and elaborates in preceding method embodiment, no longer superfluous herein
It states.
Position encoded decoding apparatus provided in an embodiment of the present invention is compiled with acquisition position in position encoded substrate
Code image；Extract position encoded characteristic information；It is position encoded imparting numerical characteristic value according to characteristic information, obtains position volume
The numerical characteristic sequence of code；Position encoded location information is determined according to numerical characteristic sequence；Position is compiled according to location information
The corresponding data of code are decoded, to obtain the corresponding visualization file of data.It is provided in an embodiment of the present invention position encoded
Decoding apparatus, decoding accuracy rate is high, is easy to implement the output of coding corresponding data.
Professional should further appreciate that, described in conjunction with the examples disclosed in the embodiments of the present disclosure
Unit and algorithm steps, can be realized with electronic hardware, computer software, or a combination of the two, hard in order to clearly demonstrate
The interchangeability of part and software generally describes each exemplary composition and step according to function in the above description.
These functions are implemented in hardware or software actually, depend on the specific application and design constraint of technical solution.
Professional technician can use different methods to achieve the described function each specific application, but this realization
It should not be considered as beyond the scope of the present invention.
The step of method described in conjunction with the examples disclosed in this document or algorithm, can use hardware, processor to execute
The combination of software module or the two is implemented.Software module can be placed in random access memory (RAM), memory, read-only memory
(ROM), electrically programmable ROM, electrically erasable ROM, register, hard disk, moveable magnetic disc, CD-ROM or technical field
In any other form of storage substrate well known to interior.
Above-described specific implementation mode has carried out further the purpose of the present invention, technical solution and advantageous effect
It is described in detail, it should be understood that the foregoing is merely the specific implementation mode of the present invention, is not intended to limit the present invention
Protection domain, all within the spirits and principles of the present invention, any modification, equivalent substitution, improvement and etc. done should all include
Within protection scope of the present invention.
Claims (8)
1. a kind of position encoded coding/decoding method, which is characterized in that the method includes：
First terminal obtains position encoded image on position encoded substrate；
Extract the position encoded characteristic information；
It is the position encoded imparting numerical characteristic value according to the characteristic information, obtains the position encoded numerical characteristic sequence
Row；
The position encoded location information is determined according to the numerical characteristic sequence；
The position encoded corresponding data are decoded according to the positional information, it can to obtain that the data are corresponding
Depending on changing file.
2. position encoded coding/decoding method according to claim 1, which is characterized in that described position encoded to specifically include circle
Point code, the extraction position encoded characteristic information specifically include：
Extract the angle information that adjacent dot code line is formed with reference axis.
3. position encoded coding/decoding method according to claim 2, which is characterized in that the method further includes:
The multiple code units being made of dot are obtained, the code unit includes the midpoint of multigroup adjacent dot code line
The position encoded unit that line limits.
4. position encoded coding/decoding method according to claim 3, which is characterized in that the method further includes:
Detect the rotation angle of the code unit；
Correction angle is generated according to the rotation angle；
Processing is corrected to the code unit according to the correction angle.
5. a kind of position encoded decoding apparatus, which is characterized in that described device includes：
First acquisition unit, for obtaining position encoded image on position encoded substrate；
Extraction unit, for extracting the position encoded characteristic information；
Assignment unit obtains the position and compiles for being the position encoded imparting numerical characteristic value according to the characteristic information
The numerical characteristic sequence of code；
Second acquisition unit, for according to location information position encoded described in the numerical characteristic retrieval；
Decoding unit, for being decoded according to the positional information to the position encoded corresponding data, to obtain
State the corresponding visualization file of data.
6. position encoded decoding apparatus according to claim 5, which is characterized in that described position encoded to specifically include circle
Point code, the extraction unit are specifically used for：
Extract the angle information that adjacent dot code line is formed with reference axis.
7. position encoded decoding apparatus according to claim 6, which is characterized in that described device further includes that third obtains
Unit, for obtaining the multiple code units being made of dot, the code unit includes multigroup adjacent dot code line
The position encoded unit that limits of midpoint line.
8. position encoded decoding apparatus according to claim 7, which is characterized in that described device further includes that correction is single
Member, the rotation angle for detecting the code unit；
Correction angle is generated according to the rotation angle；
Processing is corrected to the code unit according to the correction angle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710215046.9A CN108667462A (en) | 2017-04-02 | 2017-04-02 | Position encoded coding/decoding method and device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710215046.9A CN108667462A (en) | 2017-04-02 | 2017-04-02 | Position encoded coding/decoding method and device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108667462A true CN108667462A (en) | 2018-10-16 |
Family
ID=63784899
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710215046.9A Pending CN108667462A (en) | 2017-04-02 | 2017-04-02 | Position encoded coding/decoding method and device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108667462A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1418339A (en) * | 2000-03-21 | 2003-05-14 | 阿诺托股份公司 | Dato input arrangement |
| US6663008B1 (en) * | 1999-10-01 | 2003-12-16 | Anoto Ab | Coding pattern and apparatus and method for determining a value of at least one mark of a coding pattern |
| US20040096002A1 (en) * | 2002-11-14 | 2004-05-20 | Opentv, Inc. | Positioning of images in a data stream |
| US7865043B2 (en) * | 2003-12-16 | 2011-01-04 | Anoto Ab | Method, apparatus, computer program and storage medium for recording a movement of a user unit |
| CN102612699A (en) * | 2009-10-22 | 2012-07-25 | 张孝善 | Method for reading code displayed on printed materials |
| CN103026321A (en) * | 2010-07-23 | 2013-04-03 | 阿诺托股份公司 | Display with coding pattern |
-
2017
- 2017-04-02 CN CN201710215046.9A patent/CN108667462A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6663008B1 (en) * | 1999-10-01 | 2003-12-16 | Anoto Ab | Coding pattern and apparatus and method for determining a value of at least one mark of a coding pattern |
| CN1418339A (en) * | 2000-03-21 | 2003-05-14 | 阿诺托股份公司 | Dato input arrangement |
| US20040096002A1 (en) * | 2002-11-14 | 2004-05-20 | Opentv, Inc. | Positioning of images in a data stream |
| US7865043B2 (en) * | 2003-12-16 | 2011-01-04 | Anoto Ab | Method, apparatus, computer program and storage medium for recording a movement of a user unit |
| CN102612699A (en) * | 2009-10-22 | 2012-07-25 | 张孝善 | Method for reading code displayed on printed materials |
| CN103026321A (en) * | 2010-07-23 | 2013-04-03 | 阿诺托股份公司 | Display with coding pattern |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US12046060B2 (en) | Ink file searching method, apparatus, and program | |
| CA2613046C (en) | Dot pattern | |
| CN108334922B (en) | Dot matrix two-dimensional code and encoding and identifying method thereof | |
| JP6623465B2 (en) | Dot pattern | |
| JP2009295134A (en) | Two-dimensional code, decoder and method thereof | |
| CN105677777B (en) | Dot matrix encodes document generating method | |
| WO2012037721A1 (en) | Handwritten character font library | |
| KR100905705B1 (en) | Computer-readable recording media recording methods, systems and programs for providing electronic notebook services using digital pens and digital papers | |
| CN101609372B (en) | Two-dimensional point code, its decoding device and method | |
| CN110490157A (en) | Text appraisal procedure, character learning method, device, equipment and storage medium | |
| CN102612699B (en) | Method for reading code displayed on printed materials | |
| CN208834516U (en) | A kind of point-of-reading system convenient to use | |
| CN106548499B (en) | Method and device for generating and identifying coding pattern | |
| CN102541393A (en) | Handwritten text editing method | |
| CN103729634A (en) | Character recognition apparatus and character recognition method | |
| CN108667462A (en) | Position encoded coding/decoding method and device | |
| CN108664869A (en) | Dot matrix identifying system | |
| CN109284802A (en) | A kind of processing method and device of graphics coding | |
| CN113688648B (en) | Identification code encoding method | |
| WO2019024628A1 (en) | Method for generating two-dimensional code of stamp and stamp with two-dimensional code | |
| KR20080084394A (en) | Method and apparatus for providing digitizer function using digital paper and digital pen | |
| CN115565188A (en) | Point writing pen and writing track recording method and system applying same | |
| CN109978963A (en) | Substrate, code recognition method and device based on substrate | |
| CN111105478B (en) | Handwriting processing method, device, equipment and computer-readable storage medium | |
| CN108664867A (en) | The processing method and processing unit of coding pattern in a kind of substrate and substrate |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20200731 Address after: No.1108, 11th floor, Gaode building, No.10 Huayuan East Road, Haidian District, Beijing 100083 Applicant after: BEIJING TSTUDY TECHNOLOGY Co.,Ltd. Address before: 100098, No. 2, building 18, North Third Ring Road, Haidian District, Beijing, 803-3 Applicant before: Tian Xuesong |
|
| TA01 | Transfer of patent application right | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20211022 Address after: Room 701, unit 4, floor 5, xiujuyuan, Beiyuan Jiayuan, Chaoyang District, Beijing 100012 Applicant after: Tian Xuesong Address before: 100083 no.1108, 11th floor, Gaode building, No.10 Huayuan East Road, Haidian District, Beijing Applicant before: BEIJING TSTUDY TECHNOLOGY Co.,Ltd. |
|
| TA01 | Transfer of patent application right | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20181016 |
|
| RJ01 | Rejection of invention patent application after publication |