CN108572753A - Location point compensation method - Google Patents
Location point compensation method Download PDFInfo
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- CN108572753A CN108572753A CN201810401055.1A CN201810401055A CN108572753A CN 108572753 A CN108572753 A CN 108572753A CN 201810401055 A CN201810401055 A CN 201810401055A CN 108572753 A CN108572753 A CN 108572753A
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- coordinate
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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
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/033—Pointing devices displaced or positioned by the user, e.g. mice, trackballs, pens or joysticks; Accessories therefor
- G06F3/0354—Pointing devices displaced or positioned by the user, e.g. mice, trackballs, pens or joysticks; Accessories therefor with detection of 2D relative movements between the device, or an operating part thereof, and a plane or surface, e.g. 2D mice, trackballs, pens or pucks
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Human Computer Interaction (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Image Analysis (AREA)
Abstract
The present invention provides a kind of location point compensation method, the method includes：Obtain the first coordinate of the pen tip shadow positions of equipment；Obtain the first starting point coordinate of the first image of the equipment acquisition；According to first coordinate and first starting point coordinate, the offset between the center point coordinate of described first image and first coordinate is determined；When the equipment collects the second image, according to the center point coordinate of the offset and second image, the pen tip position of the equipment is determined.Pen tip position is compensated by offset as a result, improves the accuracy of pen tip position.
Description
Technical field
The present invention relates to technical field of data processing more particularly to a kind of location point compensation methodes.
Background technology
With the development of science and technology, the application of image collecting device is more and more extensive, certain equipment can be by image collector
It sets and is combined with pen, which can be camera etc..
In the device, the center point coordinate that dot matrix image can be identified by image collecting device, calculates pen tip
Position.
But conventionally, as factors such as the scale error of accessory, installation error in equipment, lead to every dress
Relative distance between the Image Acquisition position of the equipment prepared and pen tip is all not quite similar, so after taking the equipment, profit
The center position of dot matrix image and the distance between the shadow positions of pen tip acquired with pressure sensor is also to have error.
This error causes the pen tip position subsequently determined inaccurate.
Invention content
The purpose of the embodiment of the present invention is to provide a kind of location point compensation method, and to solve, pen tip position is inaccurate to ask
Topic.
To solve the above problems, the present invention provides a kind of location point compensation method, the location point compensation method includes：
Obtain the first coordinate of the pen tip shadow positions of equipment；
Obtain the first starting point coordinate of the first image of the equipment acquisition；
According to first coordinate and first starting point coordinate, center point coordinate and the institute of described first image are determined
State the offset between the first coordinate；
When the equipment collects the second image, according to the center point coordinate of the offset and second image,
Determine the pen tip position of the equipment.
In one possible implementation, the first coordinate of the pen tip shadow positions for obtaining equipment, including：
Default mark is moved at the first coordinate of the equipment；
By obtaining the coordinate of the default mark, the first coordinate of the equipment is obtained.
In one possible implementation, the first starting point coordinate of first image for obtaining the equipment acquisition
Before, including：
Obtain the original image of the equipment acquisition；
According to preset first size, the first image is obtained from the original image.
In one possible implementation, according to the first starting point coordinate of the first image for obtaining the equipment acquisition
Before, including：
Obtain the original image of the equipment acquisition；
According to preset second size, the original image is intercepted, obtains interception image；
According to preset first size, the first image is obtained from the interception image.
In one possible implementation, the first starting point of first image for obtaining the equipment acquisition is sat
Mark, including：
When top edge midpoint of first coordinate in described first image, according to first coordinate and described pre-
If first size, determine first starting point coordinate.
In one possible implementation, the first starting point of first image for obtaining the equipment acquisition is sat
Mark, including：
When first coordinate is outside the original image, according to first coordinate, the preset first size
With preset second size, first starting point coordinate is determined.
In one possible implementation, described according to first coordinate and first starting point coordinate, it determines
Offset between the center point coordinate of described first image and the first coordinate, including：
According to first coordinate and first starting point coordinate, the center point coordinate of described first image is determined；
According to the difference of the center point coordinate of described first image and first coordinate, the offset is determined.
By applying location point compensation method provided by the present application, the first coordinate of the pen tip shadow positions of equipment is obtained；
Obtain the first starting point coordinate of the first image of the equipment acquisition；It is sat according to first coordinate and first starting point
Mark, determines the offset between the center point coordinate of described first image and first coordinate；Second is collected in the equipment
When image, according to the center point coordinate of the offset and second image, the pen tip position of the equipment is determined.By inclined
Shifting amount compensates pen tip position, improves the accuracy of pen tip position.
Description of the drawings
Fig. 1 is location point compensation method flow diagram provided in an embodiment of the present invention；
Fig. 2 is the position relationship schematic diagram of pen tip shadow positions and the first image provided in an embodiment of the present invention；
Fig. 3 is the position relationship schematic diagram of pen tip shadow positions and original image provided in an embodiment of the present invention.
Specific implementation mode
Below by drawings and examples, technical scheme of the present invention will be described in further detail.
Fig. 1 is location point compensation method flow diagram provided in an embodiment of the present invention.The application scenarios of this method are band
There is the equipment of image collecting device and pen, which can be camera.Before equipment manufacture, need to equipment
Some numerical value be corrected, for example, the central point and the distance between pen tip to the image of equipment acquisition are calibrated, so as to
It, can be directly by the numerical value after the calibration, in the coordinate for knowing image center, directly in the later stage when using the equipment
Calculate the position of pen tip.As shown in Figure 1, this approach includes the following steps：
Step 110, the first coordinate of the pen tip shadow positions of equipment is obtained.
Before equipment manufacture, need to calibrate the numerical value of the equipment, for example, to image center location and pen tip
The distance between calibrated.
Wherein it is possible to which default mark is moved at the first coordinate of the equipment；By obtaining the default mark
Coordinate obtains the first coordinate of the equipment.
Specifically, during the volume production of equipment, calibrated by host computer.What host computer can be acquired with real-time display
Original image, the original image include the shadow positions of dot matrix image and pen tip.The pen tip shadow positions of every pen are original
Relative position in image all may be different, can pass through there are one default mark, such as " cross " mark in screen
Left mouse button moves " cross " mark, first passes through left mouse button and " cross " mark is moved to pen tip shadow positions, then point again
Right mouse button is hit, host computer will read the coordinate of the position of " cross " mark at this time, the position i.e. pen tip shadow positions,
Coordinate can be denoted as to the first coordinate, such as (x1, y1).
Step 120, the first starting point coordinate of the first image of the equipment acquisition is obtained.
The step includes two kinds of situations, the first situation directly intercepts the first image from original image.At this point, obtaining
The original image of the equipment acquisition；According to preset first size, the first image is obtained from the original image.
For example, the original image is 200*200, preset first size is 108*108, then is directly obtained from original image
Take the first image.
The second situation intercepts the first image from a part for original image.
At this point, obtaining the original image of the equipment acquisition；According to preset second size, the original image is carried out
Interception obtains interception image；According to preset first size, the first image is obtained from the interception image.
For example, original image is 200*200, preset second size is 190*190, i.e., the size of interception image is 190*
190, preset first size is 108*108, then the first image is obtained from interception image.
Step 130, according to first coordinate and first starting point coordinate, the central point of described first image is determined
Offset between coordinate and the first coordinate.
Specifically, being directed to above-mentioned two situations respectively, step 130 can be refined as two kinds of situations again.
The first, when top edge midpoint of first coordinate in described first image, according to first coordinate
With the preset first size, first starting point coordinate is determined.
Second, when first coordinate is outside the original image, according to first coordinate, described preset
One size and preset second size, determine first starting point coordinate.
Step 140, when the equipment collects the second image, according to the center of the offset and second image
Point coordinates determines the pen tip position of the equipment.
Wherein, described according to first coordinate and first starting point coordinate, determine the center of described first image
Offset between point coordinates and the first coordinate, including：
According to first coordinate and first starting point coordinate, the center point coordinate of described first image is determined；
According to the difference of the center point coordinate of described first image and first coordinate, the offset is determined.
It should be noted that the size of the size of original image, the size of interception image and the first image can basis
It is set, the application does not limit its specific numerical value.
After equipment manufacture, in use, which can identify the center point coordinate of the second image, directly
Pen tip position can be calculated by the center point coordinate and offset of second image, to realize through the offset
Compensation to pen tip position, thus obtained pen tip position are more accurate.
In the following, location point compensation method provided by the invention is further described in conjunction with Fig. 2.
Fig. 2 is the position relationship schematic diagram of pen tip shadow positions and the first image provided in an embodiment of the present invention.Such as Fig. 2 institutes
Show, in the case of this kind, " cross " indicates the top edge center in the first image, and " cross " mark can be obtained by host computer
The position of will, the i.e. shadow positions (x1, y1) of pen tip.At this point, original image is 200*200, preset first size is 108*
108, i.e. the first image is 108*108, at this point, x2=x1-108/2, y2=y1.
At this point, the center point coordinate of the first image is (x3, y3), x3=x2+108/2, y3=y2+108/2.
At this point, the offset △ X between offset, the i.e. center point coordinate of the first image and the coordinate of pen tip shadow positions
=x3-x1=0, △ Y=y3-y1=108/2.
Such case is the normal situation of comparison, and still, there is also some special circumstances, for example, pen tip shade is original
Except image.As shown in figure 3, Fig. 3 shows for the position relationship of pen tip shadow positions provided in an embodiment of the present invention and original image
It is intended to.In figure 3, original image 200*200 can be according to since the edge image quality of original image is sometimes not so good
Preset second size, such as 190*190, are truncated to interception image, in interception image, according to preset first size, than
Such as 108*108, the first image is got, at this point, the first image is 108*108.At this point, the shadow positions of pen tip are not fixed, it can
With positioned at the outside of original image, in this case, the relative position that the first image indicates with " cross " changes, " ten
The coordinate of word " mark may be at outside original image, the first starting point coordinate of the first image must in interception image, than
Such as, " cross " indicates on the upside of the left-half of original image, at this time x2=10, y2=10.First starting point of the first image
On the upside of the right half part of original image, then x2=190-108, y2=10.
At this point, the offset △ X between offset, the i.e. center point coordinate of the first image and the coordinate of pen tip shadow positions
=x3-x1=(x2+108/2)-x1, △ Y=y3-y1=(y2+108/2)-y1.
It is understood that during actual alignment, the position relationship of pen tip shadow positions and the first image also has it
His situation, above-mentioned two situations are the border condition taken, in other cases, the acquisition methods and above method phase of offset
Seemingly, details are not described herein again.
It should be noted that the unit of above-mentioned numerical value is pixel, in follow-up calculate, if any the inconsistent situation of unit,
Can unification be carried out to unit in advance, then carry out subsequent processing.
In order to ensure the precision of offset, repeated multiple times measurement can be carried out, to improve the accuracy of offset.To multiple
It is measuring as a result, processing can be carried out being averaged etc., finally obtained offset is a fixed value.
Subsequently, final offset parameter can be stored in the memory of equipment, is gone out in the equipment after the completion of calibration
After factory, in use, the image collecting device of equipment can collect the second image, and the element in equipment can be counted
The coordinate for calculating the center position of the image of acquisition, it is inclined in memory by reading according to the coordinate of the center position
Shifting amount, you can the coordinate of the center position is compensated using offset, center position is added into offset, you can
To the coordinate of the position of pen tip.
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 medium well known to interior.
Above specific implementation mode has carried out further in detail the purpose of the present invention, technical solution and advantageous effect
Illustrate, it should be understood that these are only the specific implementation mode of the present invention, the protection model being not intended to limit the present invention
It encloses, all within the spirits and principles of the present invention, any modification, equivalent substitution, improvement and etc. done should be included in the present invention
Protection domain within.
Claims (7)
1. a kind of location point compensation method, which is characterized in that the location point compensation method includes：
Obtain the first coordinate of the pen tip shadow positions of equipment；
Obtain the first starting point coordinate of the first image of the equipment acquisition；
According to first coordinate and first starting point coordinate, the center point coordinate of described first image and described the are determined
Offset between one coordinate；
When the equipment collects the second image, according to the center point coordinate of the offset and second image, determine
The pen tip position of the equipment.
2. location point compensation method according to claim 1, which is characterized in that the pen tip shadow positions for obtaining equipment
The first coordinate, including：
Default mark is moved at the first coordinate of the equipment；
By obtaining the coordinate of the default mark, the first coordinate of the equipment is obtained.
3. location point compensation method according to claim 1, which is characterized in that described to obtain the first of the equipment acquisition
Before first starting point coordinate of image, including：
Obtain the original image of the equipment acquisition；
According to preset first size, the first image is obtained from the original image.
4. location point compensation method according to claim 3, which is characterized in that according to the first of the acquisition equipment acquisition
Before first starting point coordinate of image, including：
Obtain the original image of the equipment acquisition；
According to preset second size, the original image is intercepted, obtains interception image；
According to preset first size, the first image is obtained from the interception image.
5. location point compensation method according to claim 3, which is characterized in that described to obtain the first of the equipment acquisition
First starting point coordinate of image, including：
When top edge midpoint of first coordinate in described first image, according to first coordinate and described preset
First size determines first starting point coordinate.
6. location point compensation method according to claim 4, which is characterized in that described to obtain the first of the equipment acquisition
First starting point coordinate of image, including：
When first coordinate is outside the original image, according to first coordinate, the preset first size and institute
Preset second size is stated, determines first starting point coordinate.
7. location point compensation method according to claim 1, which is characterized in that described according to first coordinate and described
First starting point coordinate determines the offset between the center point coordinate of described first image and the first coordinate, including：
According to first coordinate and first starting point coordinate, the center point coordinate of described first image is determined；
According to the difference of the center point coordinate of described first image and first coordinate, the offset is determined.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810401055.1A CN108572753A (en) | 2018-04-28 | 2018-04-28 | Location point compensation method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810401055.1A CN108572753A (en) | 2018-04-28 | 2018-04-28 | Location point compensation method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108572753A true CN108572753A (en) | 2018-09-25 |
Family
ID=63575528
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810401055.1A Withdrawn CN108572753A (en) | 2018-04-28 | 2018-04-28 | Location point compensation method |
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| Country | Link |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118089547A (en) * | 2024-04-23 | 2024-05-28 | 杭州芯海半导体技术有限公司 | Determination method and device for regional center point coordinates and intelligent warehouse system |
-
2018
- 2018-04-28 CN CN201810401055.1A patent/CN108572753A/en not_active Withdrawn
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118089547A (en) * | 2024-04-23 | 2024-05-28 | 杭州芯海半导体技术有限公司 | Determination method and device for regional center point coordinates and intelligent warehouse system |
| CN118089547B (en) * | 2024-04-23 | 2024-07-05 | 杭州芯海半导体技术有限公司 | Determination method and device for regional center point coordinates and intelligent warehouse system |
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Application publication date: 20180925 |