CN102207799A - Screen coordinate positioning method and electronic pen - Google Patents
Screen coordinate positioning method and electronic pen Download PDFInfo
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- CN102207799A CN102207799A CN2011101957312A CN201110195731A CN102207799A CN 102207799 A CN102207799 A CN 102207799A CN 2011101957312 A CN2011101957312 A CN 2011101957312A CN 201110195731 A CN201110195731 A CN 201110195731A CN 102207799 A CN102207799 A CN 102207799A
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Abstract
本发明揭露一种屏幕坐标定位方法及电子笔，所述方法包含于具有水印图案的基底上操作电子笔，透过将电子笔所撷取到的水印图案上的基础图样转换为其所对应的绝对坐标值，借以判别电子笔的当前所在位置，使得屏幕上的光标可以移动至对应的位置。
The present invention discloses a screen coordinate positioning method and an electronic pen. The method includes operating the electronic pen on a substrate with a watermark pattern, converting the basic pattern on the watermark pattern captured by the electronic pen into its corresponding absolute coordinate value, so as to determine the current location of the electronic pen, so that the cursor on the screen can be moved to the corresponding position.
Description
Technical field
The invention relates to a kind of cursor positioning method, and particularly relevant for a kind of cursor positioning method that uses absolute coordinates.
Background technology
Along with the progress of science and technology, electronic installation miscellaneous has been widely used in our daily life.For example, as personal digital assistant (personal digital assistant; PDA), mobile phone (mobile phone), intelligent mobile phone (smart phone), desktop PC, flat computer etc., the required function application more and more wider, product of these electronic installations is more polynary.
And no matter be which kind of electronic installation, all must accept operator's instruction when carrying out functional operation, so that the operation ease of input interface and conformability just seem is suitable important.Existing technology includes uses resistance-type or capacitive Touch Screen, or peripheral devices such as collocation mouse, keyboard, and see through and push, roll, or the mode operating electronic devices of sliding.Yet, resistance-type or capacitive touch control screen will increase cost.
Summary of the invention
Therefore purpose of the present invention is providing a kind of screen coordinate localization method and electronic pen exactly, in order to moving of the cursor on the function screen.
According to one embodiment of the invention, a kind of screen coordinate localization method is proposed, be applied in the electronic installation, in order to the cursor on the control screen.The screen coordinate localization method comprises provides watermark recovery to substrate, and wherein watermark recovery comprises different a plurality of base image, and each base image has a corresponding absolute coordinate respectively.Then, operation has the electronic pen of camera assembly in substrate, and electronic pen is positioned at least one base image, electronic pen captures at least one base image, then, compare out the current coordinate figure of the corresponding base image that is captured, and moving cursor to the screen corresponding to the position of current coordinate figure.
The screen coordinate localization method comprises and utilizes discrete cosine transform (discrete cosine transform; DCT) technology or 2D linear transformation (2D linear transform) technology is converted to current coordinate figure with the base image that is captured.The screen coordinate localization method also comprises and utilizes interpolation method, least square method or Kalman filter to calculate current coordinate figure.Substrate can be paper, and watermark recovery is for being imprinted on the paper.Perhaps, substrate can be screen, and watermark recovery is a translucent pattern, and at this moment, the screen coordinate localization method also comprises the unlatching watermark function, and watermark recovery is superimposed in the display frame of screen.The screen coordinate localization method also comprises through algorithm and gets rid of the part display frame that captures.The screen coordinate localization method also comprises this screen resolution of detecting, so that corresponding watermark recovery to be provided.The base image that the screen coordinate localization method also comprises transmission and captured is compared out current coordinate figure to electronic installation in electronic installation.Perhaps, in electronic pen, compare out current coordinate figure after, also transmit current coordinate figure to electronic installation.
Another embodiment of the present invention is a kind of electronic pen that is used for this screen coordinate localization method, comprises housing, camera assembly, lens module and transport module.Camera assembly is arranged in the housing, in order to the acquisition base image.Lens module is arranged in the housing, is positioned at before the camera assembly.Transport module is arranged in the housing, is connected to electronic installation.Electronic pen also comprises processing unit, is arranged in the housing to be connected with camera assembly, in order to compare base image and current coordinate figure is provided.Transport module transmits current coordinate figure to electronic installation.The fundamental design that the transport module transmission is captured is to electronic installation.Electronic pen more comprises lighting module and is arranged in the housing, contiguous camera assembly.
The screen coordinate localization method provides a kind of method of controlling the cursor on the screen, be contained in the substrate with watermark recovery and operate electronic pen, see through the basic pattern on the watermark recovery that electronic pen captured is converted to its pairing absolute coordinate, so as to differentiating the current position of electronic pen, make that the cursor on the screen can move to corresponding position.
Description of drawings
For above and other objects of the present invention, feature, advantage and embodiment can be become apparent, being described in detail as follows of appended accompanying drawing:
Fig. 1 illustrates the synoptic diagram of the watermark recovery that is applied to screen coordinate localization method of the present invention;
Fig. 2 illustrates the process flow diagram of screen coordinate localization method first embodiment of the present invention;
Fig. 3 illustrates the process flow diagram of screen coordinate localization method second embodiment of the present invention;
Fig. 4 illustrates the process flow diagram of screen coordinate localization method the 3rd embodiment of the present invention;
Fig. 5 illustrates the process flow diagram of screen coordinate localization method the 4th embodiment of the present invention;
Fig. 6 illustrates the synoptic diagram of the electronic pen that is applied to screen coordinate localization method of the present invention;
Synoptic diagram when another embodiment of screen coordinate localization method that Fig. 7 illustrates the electronic pen of application drawing 6 implements.
[primary clustering symbol description]
100: watermark recovery
110,110a: base image
200: electronic pen
210: housing
220: camera assembly
230: lens module
240: transport module
250: processing unit
260: lighting module
300: electronic installation
310: screen
M: vernier
S10～s62: step
Embodiment
Below will clearly demonstrate spirit of the present invention with accompanying drawing and detailed description, have in the technical field under any and know that usually the knowledgeable is after understanding preferred embodiment of the present invention, when can be by the technology of teachings of the present invention, change and modification, it does not break away from spirit of the present invention and scope.
In view of resistance-type or capacitive touch control screen will increase cost, the present invention proposes a kind of screen coordinate localization method that uses the image coding technology, the method can be applied among the electronic installation with screen, utilize the image of the electronic pen acquisition watermark recovery of tool image read functions, be corresponding absolute coordinates with this video conversion, can controlling moving of cursor on the screen.
With reference to Fig. 1, it illustrates the synoptic diagram of the watermark recovery that is applied to screen coordinate localization method of the present invention.Including different a plurality of base image 110 in the watermark recovery 100, is that the base image 110 with 8x8 describes in the present embodiment.More particularly, watermark recovery 100 constitutes 8x8 totally 64 base image 110 along laterally and vertically being divided into eight equal parts separately.And in watermark recovery 100, each base image 110 has its unique image respectively, and in the base image 110 of this 8x8, it can be identical not having two base image 110.In other words, this watermark recovery 100 also can not repeat or base image 110 that the GTG value is different by selecting, and these base image 110 is combined on demand again.
Because the image of each fundamental design 110 in the watermark recovery 100 is all inequality, therefore, can make each base image 110 distinguish a corresponding absolute coordinate by this as the basis of location.For example, base image 110a promptly represents the absolute coordinate of (3,1).The present invention is based on this notion, with the basis of watermark recovery 100 as coordinate setting.Can be applied in as flat computer, personal computer, mobile computer, intelligent mobile phone, projector etc. and have among the electronic installation of screen.
With reference to Fig. 2, it illustrates the process flow diagram of screen coordinate localization method first embodiment of the present invention.The screen coordinate localization method is for being applied among the electronic installation, in order to moving of cursor on the control screen.Step S10 is for providing watermark recovery in substrate, and wherein this watermark recovery comprises different a plurality of base image, and each base image has corresponding absolute coordinate respectively.Relation between base image and watermark recovery and the absolute coordinate such as the explanation of Fig. 1.Substrate in the present embodiment is a paper, and watermark recovery can be imprinted on the paper.
Step S12 has the electronic pen of camera assembly for operation in substrate, and electronic pen can be positioned on the base image of at least one, has at least one base image of the electronic pen acquisition electronic pen position of camera assembly.
Step S14 is that comparison goes out the current coordinate figure corresponding at least one base image that is captured.Comprise and utilize discrete cosine transform (discrete cosine transform; DCT) technology or 2D linear transformation (2D linear transform) technology is converted to current coordinate figure with at least one base image that is captured, and current coordinate figure is meant the absolute coordinate of electronic pen position.
For example, if the image that captures is the base image 110a among Fig. 1, the matrix that then utilizes discrete cosine transform technique conversion back to be drawn is as follows:
Therefore, the current coordinate figure that just can draw electronic pen is (3,1).
Yet, if the position of electronic pen is the words between a plurality of base image just, these base image can more utilize interpolation method, least square method or Kalman filter to calculate current coordinate figure after through discrete cosine transform technique or the conversion of 2D linear transformation technology.
Step S14 can carry out in electronic pen, and then, step S16 is for transmitting this current coordinate figure to electronic installation.Step S16 can see through wire transmission or Wireless transmission mode is carried out.
Step S18 is the current coordinate figure that electronic installation receives electronic pen, see through algorithm afterwards and converse the correspondence position of this current coordinate figure on screen, and moving cursor to the screen corresponding to the position of current coordinate figure.
With reference to Fig. 3, it illustrates the process flow diagram of screen coordinate localization method second embodiment of the present invention.Step S20 is for providing watermark recovery in substrate, and substrate can be paper, and the watermark recovery with base image can be imprinted on the paper.
Step S22 has the electronic pen of camera assembly for operation in substrate, and electronic pen can be positioned on the base image of at least one, has at least one base image of the electronic pen acquisition electronic pen position of camera assembly.
Step S24 transmits at least one base image of being captured to electronic installation for seeing through wire transmission or Radio Transmission Technology.
Step S26 is after electronic installation receives at least one base image of acquisition, sees through discrete cosine transform technique or 2D linear transformation technology and compares out current coordinate figure corresponding at least one base image that is captured.
Step S28 sees through algorithm to converse the correspondence position of this current coordinate figure on screen, and moving cursor to the screen corresponding to the position of current coordinate figure.
Watermark recovery supplies on the paper the electronic pen operation except being imprinted on, and watermark recovery can also be created on the screen of electronic installation, so that the function of Touch Screen to be provided, below will describe in detail with embodiment.
With reference to Fig. 4, it illustrates the process flow diagram of screen coordinate localization method the 3rd embodiment of the present invention.Step S30 is the watermark function in the unlocking electronic device.Step S32 is the resolution of the screen of detecting electronic installation, and the watermark recovery corresponding to screen resolution is provided.As previously mentioned, include different a plurality of base image in the watermark recovery, and each base image has corresponding absolute coordinate respectively.When the resolution of screen heals when big, the base image number that needs in the watermark recovery is also many more.
Step S34 is for providing watermark recovery to substrate.Substrate in the present embodiment is the screen of electronic installation, and watermark recovery is to be superimposed upon in the display frame of screen.Covered original display frame on the screen for fear of watermark recovery, this watermark recovery that superposes up can be translucent pattern, can also can't see but pattern that the camera assembly fechtable of electronic pen arrives for naked eyes.
Step S36 is for making to have the electronic pen of camera assembly in on-screen options, electronic pen can be positioned on the base image of at least one, has at least one base image of the electronic pen acquisition electronic pen position of camera assembly.
Step S38 is for comparing out the current coordinate figure corresponding at least one base image that is captured in electronic pen.Because the image that electronic pen captured is painted the display frame that includes on watermark recovery and the former screen, therefore, also must see through the display frame that algorithm is got rid of the former screen that captures, to obtain base image.Then, utilize discrete cosine transform technique or 2D linear transformation technology that at least one base image that is captured is converted to current coordinate figure.And optionally after, can more utilize interpolation method, least square method or Kalman filter to calculate current coordinate figure through the conversion of discrete cosine transform technique or 2D linear transformation technology.Because the image that electronic pen captured includes the display frame on watermark recovery and the former screen, therefore, more must see through the display frame that algorithm is got rid of former screen.
Step S40 is for transmitting this current coordinate figure to electronic installation.Step S40 can see through wire transmission or Wireless transmission mode is carried out.
Step S42 is the current coordinate figure that electronic installation receives electronic pen, see through algorithm afterwards and converse the correspondence position of this current coordinate figure on screen, and moving cursor to the screen corresponding to the position of current coordinate figure.
With reference to Fig. 5, it illustrates the process flow diagram of screen coordinate localization method the 4th embodiment of the present invention.Step S50 is the watermark function in the unlocking electronic device.Step S52 is the resolution of the screen of detecting electronic installation, and the watermark recovery corresponding to screen resolution is provided.Step S54 is for providing watermark recovery to substrate.Substrate in the present embodiment is the screen of electronic installation, and watermark recovery is the translucent pattern that is superimposed upon in the display frame of screen.Step S56 is for making to have the electronic pen of camera assembly in on-screen options, electronic pen can be positioned on the base image of at least one, has at least one base image of the electronic pen acquisition electronic pen position of camera assembly.Step S58 is that at least one base image that transmission captured is to electronic installation.Step S60 comprises the display frame of getting rid of the former screen capture through algorithm, obtaining base image, and compares out the current coordinate figure corresponding at least one base image that is captured.Step S62 converses the correspondence position of this current coordinate figure on screen for seeing through algorithm, and moving cursor to the screen corresponding to the position of current coordinate figure.
In sum, screen coordinate localization method of the present invention sees through discrete cosine transform technique or 2D linear transformation technology, the base image on the watermark recovery that captures is converted to absolute coordinate, so as to carrying out the location of cursor.Watermark recovery can be created on paper or the screen.Utilize discrete cosine transform technique or 2D linear transformation technology switching foundation image can in electronic pen or electronic installation, carry out for the step of absolute coordinate.This method also can utilize interpolation method, least square method or Kalman filter to calculate current coordinate figure when electronic pen is positioned on the border of a plurality of base image.The quantity of base image is corresponding to screen resolution in the watermark recovery.
With reference to Fig. 6, it illustrates the synoptic diagram of the electronic pen that is applied to screen coordinate localization method of the present invention.Electronic pen 200 includes housing 210, camera assembly 220, lens module 230, transport module 240, processing unit 250 and lighting module 260.Its middle shell 210 can be the pen type housing, to make things convenient for the user to hold and to operate.Camera assembly 220 is arranged among the housing 210, in order to capture at least one base image.Camera assembly 220 can be CMOS (Complementary Metal Oxide Semiconductor) (complementary metal oxide semiconductor; CMOS) or Charged Coupled Device (charge coupled device; CCD).
The current coordinate figure that at least one base image 110 that 300 of electronic installations transmit according to electronic pen 200 are converted to current coordinate figure or transmit according to electronic pen 200 is with moving cursor M position corresponding to current coordinate figure to the screen 310 of electronic installation 300.Base image 110 in the present embodiment is for being printed on the paper.
With reference to Fig. 7, the synoptic diagram when its another embodiment of screen coordinate localization method that illustrates the electronic pen of application drawing 6 implements.In the present embodiment, transparent or translucent watermark recovery 100 is for to be formed on the screen 310 of electronic installation 300, electronic pen 200 can be operated on electronic installation 300, the current coordinate figure that at least one base image 110 that transmits according to electronic pen 200 is converted to current coordinate figure or transmits according to electronic pen 200 is with moving cursor M position corresponding to current coordinate figure to the screen 310 of electronic installation 300.
By the invention described above preferred embodiment as can be known, use the present invention and have following advantage.This screen coordinate localization method provides a kind of method of controlling the cursor on the screen, be contained in the substrate with watermark recovery and operate electronic pen, see through the basic pattern on the watermark recovery that electronic pen captured is converted to its pairing absolute coordinate, so as to differentiating the current position of electronic pen, make that the cursor on the screen can move to corresponding position.
Though the present invention discloses as above with a preferred embodiment; right its is not in order to limit the present invention; anyly be familiar with this skill person; without departing from the spirit and scope of the present invention; when can being used for a variety of modifications and variations, so protection scope of the present invention is as the criterion when looking the scope that appending claims defines.
Claims (13)
1. a screen coordinate localization method is characterized in that, is applied in the electronic installation, in order to control the cursor on the screen, comprises:
Provide in watermark recovery to a substrate, wherein this watermark recovery comprises different a plurality of base image, and each those base image has a corresponding absolute coordinate respectively;
Operation has an electronic pen of a camera assembly in this substrate, and this electronic pen is positioned at least one those base image, this this at least one base image of electronic pen acquisition;
Compare out a current coordinate figure of corresponding this at least one base image that is captured; And
Move this cursor position corresponding to this current coordinate figure to this screen.
2. screen coordinate localization method according to claim 1 is characterized in that, comprises to utilize discrete cosine transform technique or 2D linear transformation technology that this at least one base image that is captured is converted to this current coordinate figure.
3. screen coordinate localization method according to claim 2 is characterized in that, also comprises to utilize interpolation method, least square method or Kalman filter to calculate this current coordinate figure.
4. screen coordinate localization method according to claim 1 is characterized in that, this substrate is a paper, and this watermark recovery is for being imprinted on the paper.
5. screen coordinate localization method according to claim 1 is characterized in that, this substrate is this screen, and this watermark recovery is a translucent pattern or transparent pattern.
6. screen coordinate localization method according to claim 5 is characterized in that, also comprises to open a watermark function, and this watermark recovery is superimposed in the display frame of this screen.
7. screen coordinate localization method according to claim 6 is characterized in that, also comprises through algorithm and gets rid of this display frame of part that captures.
8. screen coordinate localization method according to claim 6 is characterized in that, also comprises this screen resolution of detecting, so that this corresponding watermark recovery to be provided.
9. screen coordinate localization method according to claim 1 is characterized in that, this at least one base image that also comprises transmission and captured is compared out this current coordinate figure to this electronic installation in this electronic installation.
10. screen coordinate localization method according to claim 1 is characterized in that, after this electronic pen is compared out this current coordinate figure, also transmits this current coordinate figure to this electronic installation.
11. an electronic pen as claimed in claim 1 is characterized in that, comprises:
One housing;
This camera assembly is arranged in this housing, in order to this at least one base image of acquisition;
One lens module is arranged in this housing, is positioned at before this camera assembly; And
One transport module is arranged in this housing, is connected to this electronic installation.
12. electronic pen according to claim 11 is characterized in that, also comprises a processing unit, is arranged in this housing to be connected with this camera assembly, in order to compare this at least one base image and to provide this current coordinate figure to this transport module.
13. electronic pen according to claim 11 is characterized in that, this at least one fundamental design that this transport module transmission is captured is to this electronic installation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101957312A CN102207799A (en) | 2011-07-06 | 2011-07-06 | Screen coordinate positioning method and electronic pen |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101957312A CN102207799A (en) | 2011-07-06 | 2011-07-06 | Screen coordinate positioning method and electronic pen |
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| CN102207799A true CN102207799A (en) | 2011-10-05 |
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| CN2011101957312A Pending CN102207799A (en) | 2011-07-06 | 2011-07-06 | Screen coordinate positioning method and electronic pen |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107291272A (en) * | 2017-06-20 | 2017-10-24 | 广州视源电子科技股份有限公司 | Cursor position determination and image capture method and device and related equipment |
| CN108268157A (en) * | 2016-12-30 | 2018-07-10 | 北京大学 | A kind of equipment localization method and device for being applied to large display screen curtain or projection screen |
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| CN1262510A (en) * | 1999-01-19 | 2000-08-09 | 日本电气株式会社 | Method and device for inserting electronic watermark into digital image and testing electronic watermark |
| CN1641683A (en) * | 2004-01-16 | 2005-07-20 | 微软公司 | Strokes localization by m-array decoding and fast image matching |
| CN102012770A (en) * | 2010-11-22 | 2011-04-13 | 广东威创视讯科技股份有限公司 | Image correction-based camera positioning method |
| CN102096485A (en) * | 2011-01-13 | 2011-06-15 | 圆展科技股份有限公司 | Pen type input device |
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Patent Citations (4)
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| CN1262510A (en) * | 1999-01-19 | 2000-08-09 | 日本电气株式会社 | Method and device for inserting electronic watermark into digital image and testing electronic watermark |
| CN1641683A (en) * | 2004-01-16 | 2005-07-20 | 微软公司 | Strokes localization by m-array decoding and fast image matching |
| CN102012770A (en) * | 2010-11-22 | 2011-04-13 | 广东威创视讯科技股份有限公司 | Image correction-based camera positioning method |
| CN102096485A (en) * | 2011-01-13 | 2011-06-15 | 圆展科技股份有限公司 | Pen type input device |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108268157A (en) * | 2016-12-30 | 2018-07-10 | 北京大学 | A kind of equipment localization method and device for being applied to large display screen curtain or projection screen |
| CN108268157B (en) * | 2016-12-30 | 2024-03-15 | 北京大学 | Equipment positioning method and device applied to large display screen or projection screen |
| CN107291272A (en) * | 2017-06-20 | 2017-10-24 | 广州视源电子科技股份有限公司 | Cursor position determination and image capture method and device and related equipment |
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Application publication date: 20111005 |