CN106447736A - Multi-calibration-point detection method based on line-by-line division - Google Patents
Multi-calibration-point detection method based on line-by-line division Download PDFInfo
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- CN106447736A CN106447736A CN201611037678.2A CN201611037678A CN106447736A CN 106447736 A CN106447736 A CN 106447736A CN 201611037678 A CN201611037678 A CN 201611037678A CN 106447736 A CN106447736 A CN 106447736A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N9/00—Details of colour television systems
- H04N9/12—Picture reproducers
- H04N9/31—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]
- H04N9/3191—Testing thereof
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Abstract
The invention relates to a multi-calibration-point detection method based on line-by-line division. The multi-calibration-point detection method comprises the following steps: (1) drawing calibration points and determining a mapping relation of a position sequence of a computer display screen and a projected picture; (2) collecting a projection calibration image after each time of drawing the calibration points and obtaining a mapping direction of the computer display screen in the collected image; (3) drawing the calibration points for a plurality of times on the computer display screen, so as to enable all the calibration points to be uniformly and fully distributed on the whole computer display screen; (4) projecting the calibration points and collecting the projection calibration image; determining a position order of all the calibration points; (5) carrying out the line-by-line division on the calibration points and dividing the calibration points on the same line; and (6) determining a relation mapping pair of the calibration points between the computer display screen and the projection calibration image. Based on a line-by-line division method, the multi-calibration-point detection method can accurately calculate the relation mapping pair between the calibration points in the computer display screen and projection calibration points and is convenient for post-period utilization.
Description
Technical field
The invention belongs to image procossing and Computer Vision Detection field are and in particular to a kind of many marks dividing on line by line basis
Fixed point detection method.
Background technology
Along with the fast development of society's science and technology, human-computer interaction technology is applied to the daily life of society more and more widely
In, it creates tremendous influence to the development of computer, and also continues to affect the life of people.With based on the numerical digit world
The sixth sense technology and two popular human-computer interaction technologies such as intelligent body sensing system Kinect appearance, man-machine interaction market
Obtain huge expansion.
Under the huge market prospect of human-computer interaction technology, interactive projection system then arises at the historic moment.Due to interaction
The requirement to cost for the formula optical projection system is relatively low, can meet the demand of user well, can be widely used in enterprise, machine at present
In the teaching of the academic conference of structure and education ＆ training industry, drastically increase the interactivity between user and computer, show
Write the efficiency that increased exchange between user.
It is known that for interactive projection system, wanting to realize more satisfactory interactivity, then need with certain mark
Determine precision as optimized integration.For realizing high-precision demarcation, how to set up point and subpoint in computer display screens
Between mapping pair, become key problem.Only construct mapping pair, the coordinate relation between mapping pair could be set up.Cause
This, the importance setting up mapping pair between fixed point is self-evident.
Content of the invention
It is an object of the invention to provide a kind of many demarcation point detecting method dividing on line by line basis, by drawing on line by line basis
The method divided, can accurately determine the relationship map pair between the fixed point in computer display screens and Projection surveying point, side
Follow-up use.
For achieving the above object, present invention employs technical scheme below：
A kind of many demarcation point detecting method dividing on line by line basis, comprises the following steps：
（1）Draw fixed point, determine the mapping relations of the location order between computer display screens and projected picture；
（2）The Projection surveying image after fixed point is drawn in collection every time, obtains computer display screens reflecting in collection image
Penetrate direction；
（3）Fixed point is repeatedly drawn to computer display screens, makes all fixed points uniformly be covered with the aobvious of whole computer
Display screen curtain；
（4）Projection surveying point, and acquired projections uncalibrated image, determine the location order of all fixed points；
（5）Fixed point is divided line by line, is marked off the fixed point of same a line；
（6）Determine the relationship map pair of the fixed point between computer display screens and Projection surveying image.
In such scheme, step（1）In, described drafting fixed point, determine between computer display screens and projected picture
Location order mapping relations, specifically include following steps：
（11）In four drift angle directions position of computer display screens, the position choosing not drawn fixed point is carried out
Draw fixed point；
（12）The fixed point of drafting is numbered successively, and carries out Projection surveying point operation；
（13）Circulation execution step（11）~（12）So that four corner positions are all calibrated a demarcation in computer display screens
Till.
In such scheme, step（2）In, the Projection surveying image after fixed point is drawn in described collection every time, obtains and calculates
Mapping direction in collection image for the machine display screen, specifically includes following steps：
（21）Using photographic head successively acquisition step（1）Middle Projection surveying image；
（22）According to step（21）The Projection surveying image of middle collection and the order of corresponding drafting fixed point, obtain computer
Mapping direction in collection image for the display screen, this mapping direction includes just putting, is inverted, "Left"-deviationist is put and put with Right deviation.
In such scheme, step（4）In, described Projection surveying point, and acquired projections uncalibrated image, determine all fixed points
Location order, specifically include following steps：
（41）Determine fixed point and the detection direction being located at a line；
（42）Based on the most new-found fixed point, detection direction make a look up the fixed point closest with it be designated as with
This point is located at the adjacent fixed point with a line, is designated as the of this row fixed point；
（43）Every time with step（42）Based on the up-to-date fixed point of middle lookup, repeated execution of steps（42）Until it is same positioned at being same as
The fixed point of a line is all searched and is finished；
（45）Search and its nearest fixed point in the inverse detection direction of row；
（46）Circulation execution step（42）~（45）, complete the detection of all fixed points.
As shown from the above technical solution, the present invention passes through to travel through each of projected image fixed point, will be located at exactly
Fixed point with a line divides out, after finishing positioned at the fixed point determination with a line, continues to detect remaining fixed point, and
Fixed point positioned at next line is divided out simultaneously, after having traveled through all fixed points, all demarcation can be achieved exactly
The location order ownership of point, the row that is, this point is located in row, the secondly location order according to projecting direction, determine its projection
Direction, just puts, and is inverted, "Left"-deviationist is put, or Right deviation is put, and projecting direction and ready-portioned subpoint combine the most at last, determine
The physical location order of all fixed points.Method by dividing on line by line basis, can accurately determine in computer display screens
Fixed point and Projection surveying point between relationship map pair, facilitate the later stage use.
Brief description
Fig. 1 is the drafting fixed point location order schematic diagram of the present invention；
Fig. 2 be the present invention fixed point complete after schematic diagram；
Fig. 3 is that the projected image of the present invention divides schematic diagram line by line；
Fig. 4 is the flow chart of the present invention；
Fig. 5 is that the fixed point of the present invention divides flow chart line by line.
Specific embodiment
The present invention will be further described below in conjunction with the accompanying drawings：
As shown in Fig. 1～5, a kind of many demarcation point detecting method dividing on line by line basis, comprise the following steps：
S1：Determine the mapping relations of the location order between computer display screens and projected picture.In this step, need into
4 drafting fixed points of row, the order of drafting according to upper left, upper right, bottom right and lower-left and is numbered, drawing process such as Fig. 1
Shown.Specifically include following steps：
S11：In four drift angle directions position of computer display screens, the position choosing not drawn fixed point is carried out
Draw fixed point；
S12：The fixed point of drafting is numbered successively, and carries out Projection surveying point operation；
S13：Circulation execution step（11）~（12）Four times so that in computer display screens four corner positions be all calibrated a little
Calibrated.
S2：Projection surveying image after fixed point is drawn in photographic head collection every time, obtains computer display screens and exists
Mapping direction in collection image, comprises the following steps that：
S21:Using Projection surveying image in photographic head successively acquisition step 1,4 width images can be gathered altogether；
S22:According to step（21）Four images of middle collection and the order of corresponding drafting fixed point, determine Computer display
The mapping relations of the location order between screen and projected picture, including just putting, be inverted, "Left"-deviationist is put and is put with Right deviation；
Further, since photographic head is in acquired projections picture, the picture area of collection is bigger than actual projected picture region, because
This, can obtain effective calibration information region, keep away according to the position of four fixed points it may be determined that the region of projected picture
The interference to latter acts for the Mian Fei view field.
S3：Repeatedly fixed point is drawn to computer display screens, makes all fixed points uniformly be covered with whole computer
Display screen, specifically include following steps：
S31：In this step, need altogether to draw 60 fixed points；
S32：Often row draws 8 fixed points, needs altogether to draw 8 row.For display screen, the 1st row and last 1 row only need
Draw 6 fixed points（2 fixed points have been depicted in step 1 before）；
S33：In drawing process, two neighboring fixed point needs at intervals, to treat that 64 fixed points are all drawn and finish
Afterwards, so that all fixed points are uniformly covered with whole computer screen curtain, as shown in Figure 2.
S4：Projection surveying point, acquired projections uncalibrated image simultaneously detects to fixed point, determines the position of all fixed points
Order, specific as follows：
S41：Determine the fixed point being located at a line.By row traversal Projection surveying image, find the 1st fixed point, it is the 1st row
The 1st fixed point, it is necessarily belonging to one of numbering 1～4 fixed point draw in step 1；
S42：Determine detection direction.If located in the 1st fixed point left side fixed point number be more than the right number, then to
A left side makes a look up detection operation, otherwise searches to the right；
S43：Based on the most new-found fixed point, make a look up in detection direction（The fixed point in non-detection direction is not examined
Consider）, and its closest fixed point is designated as being located at adjacent fixed point with a line with this point, is designated as the of this row demarcation
Point；
S44：Every time with step（43）Based on the up-to-date fixed point of middle lookup, repeated execution of steps（43）Until it is same positioned at being same as
The fixed point of a line is all searched and is finished, that is, the number of the fixed point positioned at same a line searched is 8.Wherein, in the 1st row
1 fixed point also belongs to the one of fixed point in the numbering 1～4 drawn in step 1 afterwards.If less than 8 points, recognized
For the operation failure of Projection surveying point, re-start the projection operation of fixed point；
S45：Search and its nearest fixed point in the inverse detection direction of row, be designated as the 1st fixed point of row, continue cycling through
Execution step（43）~（44）, determine all fixed points being located at row；
S46：Circulation execution step（45）, complete the detection of all fixed points.In eighth row the 1st and last 1 fixed point are equal
Belong to one of the numbering 1～4 drawn in step 1 fixed point.
S5：Fixed point is divided line by line, is marked off the fixed point of same a line：
In the present embodiment, taking detect direction as a left side as a example, and with reference to practical situation it is contemplated that the picture of photographic head collection may be subject to
To the factor such as the impact of lens distortion and map orientation order, in this case, the uncalibrated image of projection is acquired,
And divided line by line, the fixed point line positioned at same a line couples together, as shown in Figure 3.
S6：Determine the relationship map pair of the fixed point between computer display screens and Projection surveying image.
The 1st the 1st projection with last 1 fixed point with last 1 fixed point and eighth row due to the 1st row
Sequencing can represent the location order of mapping, therefore by combining the location order of mapping（Just put, be inverted, "Left"-deviationist is put and right
The one of which inclined in putting）With the location order of fixed point, the row that is, this point is located in row, finally realize Computer display
Mapping relations one by one between all fixed points in screen and Projection surveying point, and by mapping relations to storing, convenient
Later use.
Embodiment described above is only that the preferred embodiment of the present invention is described, the not model to the present invention
Enclose and be defined, on the premise of without departing from design spirit of the present invention, the technical side to the present invention for the those of ordinary skill in the art
Various modifications and improvement that case is made, all should fall in the protection domain of claims of the present invention determination.
Claims (4)
1. a kind of many demarcation point detecting method dividing on line by line basis is it is characterised in that comprise the following steps：
（1）Draw fixed point, determine the mapping relations of the location order between computer display screens and projected picture；
（2）The Projection surveying image after fixed point is drawn in collection every time, obtains computer display screens reflecting in collection image
Penetrate direction；
（3）Fixed point is repeatedly drawn to computer display screens, makes all fixed points uniformly be covered with the aobvious of whole computer
Display screen curtain；
（4）Projection surveying point, and acquired projections uncalibrated image, determine the location order of all fixed points；
（5）Fixed point is divided line by line, is marked off the fixed point of same a line；
（6）Determine the relationship map pair of the fixed point between computer display screens and Projection surveying image.
2. the many demarcation point detecting method dividing on line by line basis according to claim 1 it is characterised in that：Step（1）In,
Described drafting fixed point, determines the mapping relations of the location order between computer display screens and projected picture, specifically includes
Following steps：
（11）In four drift angle directions position of computer display screens, the position choosing not drawn fixed point is carried out
Draw fixed point；
（12）The fixed point of drafting is numbered successively, and carries out Projection surveying point operation；
（13）Circulation execution step（11）~（12）So that four corner positions are all calibrated a demarcation in computer display screens
Till.
3. the many demarcation point detecting method dividing on line by line basis according to claim 1 it is characterised in that：Step（2）In,
The Projection surveying image after fixed point is drawn in described collection every time, obtains mapping side in collection image for the computer display screens
To specifically including following steps：
（21）Using photographic head successively acquisition step（1）Middle Projection surveying image；
（22）According to step（21）The Projection surveying image of middle collection and the order of corresponding drafting fixed point, obtain computer
Mapping direction in collection image for the display screen, this mapping direction includes just putting, is inverted, "Left"-deviationist is put and put with Right deviation.
4. the many demarcation point detecting method dividing on line by line basis according to claim 1 it is characterised in that：Step（4）In,
Described Projection surveying point, and acquired projections uncalibrated image, determine the location order of all fixed points, specifically include following steps：
（41）Determine fixed point and the detection direction being located at a line；
（42）Based on the most new-found fixed point, detection direction make a look up the fixed point closest with it be designated as with
This point is located at the adjacent fixed point with a line, is designated as the of this row fixed point；
（43）Every time with step（42）Based on the up-to-date fixed point of middle lookup, repeated execution of steps（42）Until it is same positioned at being same as
The fixed point of a line is all searched and is finished；
（45）Search and its nearest fixed point in the inverse detection direction of row；
（46）Circulation execution step（42）~（45）, complete the detection of all fixed points.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201611037678.2A CN106447736B (en) | 2016-11-23 | 2016-11-23 | A kind of more calibration point detecting methods divided on line by line basis |
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| CN201611037678.2A CN106447736B (en) | 2016-11-23 | 2016-11-23 | A kind of more calibration point detecting methods divided on line by line basis |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112118435A (en) * | 2020-08-04 | 2020-12-22 | 山东大学 | Multi-projection fusion method and system for special-shaped metal screen |
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| US6754379B2 (en) * | 1998-09-25 | 2004-06-22 | Apple Computer, Inc. | Aligning rectilinear images in 3D through projective registration and calibration |
| CN101166288A (en) * | 2006-10-17 | 2008-04-23 | 精工爱普生株式会社 | Calibration technique for heads up display system |
| US20110228104A1 (en) * | 2010-03-22 | 2011-09-22 | Steve Nelson | Multi-Projector Display System Calibration |
| CN105787920A (en) * | 2014-12-26 | 2016-07-20 | 秦永进 | Dome screen demarcating method, demarcating system and control device |
| CN105818746A (en) * | 2015-01-05 | 2016-08-03 | 上海纵目科技有限公司 | Calibration method and system of panoramic advanced driver assistance system |
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2016
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6754379B2 (en) * | 1998-09-25 | 2004-06-22 | Apple Computer, Inc. | Aligning rectilinear images in 3D through projective registration and calibration |
| CN101166288A (en) * | 2006-10-17 | 2008-04-23 | 精工爱普生株式会社 | Calibration technique for heads up display system |
| US20110228104A1 (en) * | 2010-03-22 | 2011-09-22 | Steve Nelson | Multi-Projector Display System Calibration |
| CN105787920A (en) * | 2014-12-26 | 2016-07-20 | 秦永进 | Dome screen demarcating method, demarcating system and control device |
| CN105818746A (en) * | 2015-01-05 | 2016-08-03 | 上海纵目科技有限公司 | Calibration method and system of panoramic advanced driver assistance system |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112118435A (en) * | 2020-08-04 | 2020-12-22 | 山东大学 | Multi-projection fusion method and system for special-shaped metal screen |
| CN112118435B (en) * | 2020-08-04 | 2021-06-25 | 山东大学 | Multi-projection fusion method and system for special-shaped metal screen |
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