CN108012129A - A kind of method of adjustment of abnormity image - Google Patents
A kind of method of adjustment of abnormity image Download PDFInfo
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- CN108012129A CN108012129A CN201710323172.6A CN201710323172A CN108012129A CN 108012129 A CN108012129 A CN 108012129A CN 201710323172 A CN201710323172 A CN 201710323172A CN 108012129 A CN108012129 A CN 108012129A
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- geometric correction
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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]
- H04N9/3179—Video signal processing therefor
- H04N9/3185—Geometric adjustment, e.g. keystone or convergence
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Abstract
A kind of method of adjustment of abnormity image, including：Test grid image signal is received, and is projected on the display screen；Geometric correction first is carried out to the well-regulated deviation between the grid image and target gridding image that currently show, geometric correction then is carried out to the position between the grid image and target gridding image that currently show there are irregular variation one by one；The grid image currently shown of a geometric correction institute foundation is to complete the grid image projected again after a preceding geometric correction on the display screen afterwards；Receiving needs picture signal to be shown, carries out the coordinate map generated in geometric correction to grid image according to last time to needing picture signal to be shown to carry out geometric correction, by the picture signal projection after geometric correction on the display screen.The present invention can realize the adjustment of the irregular image deviateed arbitrary shape, regulate the speed fast.
Description
Technical field
The present invention relates to a kind of method of adjustment of special-shaped image.
Background technology
At present, the Image display position of the concatenation unit of existing DLP mosaic screens is all completely by intense adjustment movement
Position realize the correct display of image on the screen.This method, which can only be realized, is adjusted more regular image, than
Such as general image offset, tilt, amplification, reduce, but for reflective mirror is uneven and other reasons caused by image it is irregularly curved
Song, is difficult to realize the adjustment of image, and is taken time and effort for project installation personnel, and efficiency is lower.
The content of the invention
The technical problems to be solved by the invention are to provide a kind of method of adjustment of special-shaped image, it can be realized to appointing
The adjustment for the irregular image that shape of anticipating deviates, regulates the speed fast.
In order to solve the above-mentioned technical problem, the technical solution used in the present invention is：
A kind of method of adjustment of abnormity image, comprises the following steps：
Test grid image signal is received, and is projected on the display screen；
Geometric correction first is carried out to the well-regulated deviation between the grid image and target gridding image that currently show, then by
Position between a grid image and target gridding image to currently showing there are irregular variation carries out geometric correction；Its
In, the grid image currently shown of rear geometric correction institute foundation is projected in again after completing a preceding geometric correction
Grid image on display screen；
Receiving needs picture signal to be shown, is reflected according to the coordinate that last time carries out generated in geometric correction grid image
Picture signal after geometric correction is projected in display screen by firing table to needing picture signal to be shown to carry out geometric correction
On.
Due to the adoption of the above technical scheme, the present invention has at least the following advantages and feature：
1. the present invention solve DLP Projection Displays caused by reflective mirror and other reasons irregular image display deviate, with
And the problem of needing to show special-shaped image under convention display curtain and Special use occasion；
2. the present invention has the advantages that to regulate the speed fast, figure can be completed in general a few minutes and is adjusted, while is had also achieved logical
Cross the effect for the special-shaped Image Adjusting that machinery adjustment can not be realized.
Brief description of the drawings
Fig. 1 is a kind of flow diagram of the method for adjustment of special-shaped image according to an embodiment of the invention.
Fig. 2 shows the schematic diagram of the grid image before special-shaped Image Adjusting according to an embodiment of the invention is implemented.
After Fig. 3 shows that the well-regulated deviation according to an embodiment of the invention to special-shaped image carries out geometric correction
Grid image schematic diagram.
Fig. 4 shows that all irregular variations according to an embodiment of the invention to special-shaped image carry out geometric correction
The schematic diagram of grid image afterwards.
Fig. 5 is shown realizes eye-shaped figure using a kind of method of adjustment of special-shaped image according to an embodiment of the invention
Display renderings.
Embodiment
The present invention is described in detail with reference to the accompanying drawings and examples.
Please refer to Fig.1.A kind of method of adjustment of special-shaped image according to an embodiment of the invention, comprises the following steps：
The test grid image signal that test Grid Signal Generator is sent is received, and is projected on the display screen；
In trimming process, first the well-regulated deviation between the grid image and target gridding image that currently show is carried out several
What is corrected, then one by one to the position foundation between the grid image and target gridding image that currently show there are irregular variation
Coordinate map carries out geometric correction；Wherein, the grid image currently shown of rear geometric correction institute foundation is to complete
Again grid image on the display screen is projected after a preceding geometric correction；The coordinate mapping of a geometric correction institute foundation afterwards
Table is to be obtained on the preceding basis for once correcting generated coordinate map by calculating；
Receiving needs picture signal to be shown, is reflected according to the coordinate that last time carries out generated in geometric correction grid image
Picture signal after geometric correction is projected in display screen by firing table to needing picture signal to be shown to carry out geometric correction
On.
In the present embodiment, foregoing well-regulated deviation refer to by after correction, image can become rectangle deviation,
But not limited to this.
In the present embodiment, the well-regulated deviation between the grid image and target gridding image that currently show is passed through
Perspective transform mode carries out geometric correction, irregular to existing between the grid image and target gridding image that currently show one by one
The position of deviation carries out geometric correction by parabolic manner.
Incorporated by reference to shown in Fig. 2 and Fig. 3.In the present embodiment, above-mentioned grid image and target gridding to currently showing
Well-regulated deviation between image carries out geometric correction by perspective transform mode and further comprises the steps：
According to the coordinate on the four of the grid image currently shown vertex and the coordinate on four vertex of target gridding image, pass through
Perspective transform calculates the coordinate map for obtaining the image and target gridding image currently shown；Perspective transform calculate formula be
The prior art, details are not described herein.
Geometric correction is carried out to test grid image signal according to obtained coordinate map is calculated by perspective transform,
By the grid image signal projection after geometric correction on the display screen.
Fig. 2 shows the schematic diagram of the grid image before special-shaped Image Adjusting is carried out, it is to test Grid Signal
Image in the test grid signal output to display screen of device generation.For DLP display systems, due to movement position
Relation, the grid image of Projection Display is not usually the rectangle of standard, and for special-shaped display screen, the net of display
Table images are not the shape for being actually needed display yet.At this time pass through display screen, four tops of selection target grid image
Point t1, t2, t3 and t4, according to the coordinate on the four of the grid image currently shown vertex and four apex coordinates of target image
Carry out perspective transform calculating, you can obtain the coordinate map of the image and target gridding image currently shown.The coordinate maps
Table can reflect the actual displayed coordinate at any point in the grid image being currently displayed on screen with it in target network trrellis diagram
The transformational relation of coordinate as in.Then, according to the coordinate map again refresh testing Grid Signal and it is output to display screen
Curtain, the results are shown in Figure 3 for it.From figure 3, it can be seen that four vertex of the grid image after geometric correction have been distinguished
Overlapped with t1, t2, t3 and t4, that is, realize and the well-regulated deviation between original mesh image and target gridding image is carried out
The purpose of geometric correction.
With reference to shown in Fig. 4.In the present embodiment, the above-mentioned grid image and target gridding image to currently showing one by one
Between there are irregular variation position by parabolic manner carry out geometric correction further comprise the steps：
First portion there are irregular variation is selected on the grid image after completing the geometric correction of well-regulated deviation
Position, three points are selected at this first position there are irregular variation as parabolical three key points, three passes
Key point is respectively each point on parabolical vertex and parabola both sides；
Along parabolical symmetry axis, in mobile vertex of a parabola to target location, according to seat of three key points before movement
Coordinate value after scale value and movement calculates parabolical equation coefficient；
Obtained in the parabolical equation obtained, three key points coordinate value after movement and being calculated by perspective transform
On the basis of the coordinate map obtained, parabola symmetry axis and the coordinate of parabolical all the points are first calculated, is then calculated pre-
The coordinate of all the points of adjustment region where the parabola first set, obtains first coordinate for being used to correct irregular variation and reflects
Firing table；
The coordinate map for being used to correct irregular variation according to described first carries out geometry school to test grid image signal
Just, by the grid image signal projection after geometric correction on the display screen；
Second position there are irregular variation is once selected on the grid image after geometric correction on completing, this
Two there are irregular variation position select three points be respectively as parabolical three key points, three key points
Parabolical vertex and each point on parabola both sides；
Along parabolical symmetry axis, in mobile vertex of a parabola to target location, according to seat of three key points before movement
Coordinate value after scale value and movement calculates parabolical equation coefficient；
The parabolical equation obtained, three key points coordinate value after movement and on once geometric correction used
Coordinate map on the basis of, first calculate the coordinate of parabola symmetry axis and parabolical all the points, then calculate advance
The coordinate of all the points of adjustment region where the parabola of setting, obtains second coordinate mapping for being used to correct irregular variation
Table；
The coordinate map for being used to correct irregular variation according to described second carries out geometry school to test grid image signal
Just, by the grid image signal projection after geometric correction on the display screen；
The rest may be inferred, until completing the adjustment at all positions there are irregular variation.
Since image is respectively provided with certain resolution ratio, foregoing parabola symmetry axis and parabola have how many
Point is clear for the technician.In the present embodiment, adjustment region where above-mentioned parabola, which is set in advance in, leans on
In a certain range of nearly vertex of a parabola.
In the grid image shown in Fig. 3, there is the position 11,12,13 that three have irregular variation, with first
Exemplified by the position 11 of irregular variation, three points o, p, q are selected in first position 11 there are irregular variation
As parabolical three key points, wherein, point o is parabolical vertex, and each one that point p and point q is parabola both sides
Point.Parabolical equation is y=ax2+ bx+c, according to the coordinate value meter after coordinate value of three key points before movement and movement
Calculate parabolical equation coefficient a, b, c.So as to determine that parabolic equation is y=ax2+bx+c.In parabola Image Adjusting
When, grid image is adjusted along parabolical symmetry axis, after adjustment, calculates parabola symmetry axis all the points
Coordinate, calculates the coordinate of parabola all the points, the coordinate of adjustment region all the points where then calculating parabola, so as to obtain
First coordinate map for being used to correct irregular variation.Then, according to this first seat for being used to correct irregular variation
Mark mapping table and geometric correction is carried out to test grid image signal, the grid image signal after geometric correction is projected in display screen
On curtain, the geometric correction for position 12 is carried out according to the grid image after the geometric correction.Complete the geometry of regular deviation
Grid image after correction and three geometric corrections there are the position of irregular variation is as shown in figure 4, can from Fig. 4
Go out, original irregular grid image has been corrected as the rectangular mesh image of standard.
In a kind of specific embodiment, the method for adjustment of abnormity image according to an embodiment of the invention can pass through meter
Calculation machine realizes, whole adjustment process only needs to be connected after DLP display units carry out shirtsleeve operation with by computer, a few minutes
It can be completed in clock, not only realize quick adjustment, but also reach the effect that the abnormity that can not be realized by machinery adjustment adjusts.
Method using the present invention can also be realized shows special-shaped image on convention display curtain.Main flow be according to
The requirement of special-shaped image display is needed, by testing the well-regulated deviation of grid image and the portion of all irregular variations
Position carries out geometric correction, so that test grid image is adjusted to satisfactory various different row shapes, and is directed to various abnormity
Shape generates a coordinate map respectively.Then, input shows signal, the profiled shape selection wherein one shown as required
A corresponding coordinate map is changed, and is finally output to display screen.
As shown in figure 5, at one 16：On 9 convention display curtain, by the present invention special-shaped image method of adjustment,
It can easily realize eye-shaped image display, the screen of special shape need not be both installed, it is not required that make special shape
Image signal source, to realize that it is very big convenient that the display of special-shaped image provides in special occasions.
Claims (5)
1. a kind of method of adjustment of abnormity image, it is characterised in that comprise the following steps：
Test grid image signal is received, and is projected on the display screen；
Geometric correction first is carried out to the well-regulated deviation between the grid image and target gridding image that currently show, then by
Position between a grid image and target gridding image to currently showing there are irregular variation carries out geometric correction；Its
In, the grid image currently shown of rear geometric correction institute foundation is projected in again after completing a preceding geometric correction
Grid image on display screen；
Receiving needs picture signal to be shown, is reflected according to the coordinate that last time carries out generated in geometric correction grid image
Picture signal after geometric correction is projected in display screen by firing table to needing picture signal to be shown to carry out geometric correction
On.
2. the method for adjustment of a kind of special-shaped image according to claim 1, it is characterised in that to the grid chart currently shown
As the well-regulated deviation between target gridding image carries out geometric correction by perspective transform mode.
3. the method for adjustment of a kind of special-shaped image according to claim 2, it is characterised in that described to currently showing
Well-regulated deviation between grid image and target gridding image carries out geometric correction by perspective transform mode and further wraps
Include following steps：
According to the coordinate on the four of the grid image currently shown vertex and the coordinate on four vertex of target gridding image, pass through
Perspective transform calculates the coordinate map for obtaining the image and target gridding image currently shown；
Geometric correction is carried out to test grid image signal according to obtained coordinate map is calculated by perspective transform, will be several
Grid image signal after what is corrected projects on the display screen.
4. the method for adjustment of a kind of special-shaped image according to claim 1 or 2 or 3, it is characterised in that one by one to current aobvious
Position between the grid image and target gridding image that show there are irregular variation carries out geometric correction by parabolic manner.
5. the method for adjustment of a kind of special-shaped image according to claim 4, it is characterised in that described shows to current one by one
Position between the grid image and target gridding image that show there are irregular variation carries out geometric correction by parabolic manner
Further comprise the steps：
First portion there are irregular variation is selected on the grid image after completing the geometric correction of well-regulated deviation
Position, three points are selected at this first position there are irregular variation as parabolical three key points, three passes
Key point is respectively each point on parabolical vertex and parabola both sides；
Along parabolical symmetry axis, in mobile vertex of a parabola to target location, according to seat of three key points before movement
Coordinate value after scale value and movement calculates parabolical equation coefficient；
Calculate what is obtained in the parabolical equation obtained, three key points coordinate value after movement and perspective transform
On the basis of coordinate map, parabola symmetry axis and the coordinate of parabolical all the points are first calculated, then calculates and sets in advance
The coordinate of all the points of adjustment region where fixed parabola, obtains first coordinate mapping for being used to correct irregular variation
Table；
The coordinate map for being used to correct irregular variation according to described first carries out geometry school to test grid image signal
Just, by the grid image signal projection after geometric correction on the display screen；
Second position there are irregular variation is once selected on the grid image after geometric correction on completing, this
Two there are irregular variation position select three points be respectively as parabolical three key points, three key points
Parabolical vertex and each point on parabola both sides；
Along parabolical symmetry axis, in mobile vertex of a parabola to target location, according to seat of three key points before movement
Coordinate value after scale value and movement calculates parabolical equation coefficient；
The parabolical equation obtained, three key points coordinate value after movement and on once geometric correction used
Coordinate map on the basis of, first calculate the coordinate of parabola symmetry axis and parabolical all the points, then calculate advance
The coordinate of all the points of adjustment region where the parabola of setting, obtains second coordinate mapping for being used to correct irregular variation
Table；
The coordinate map for being used to correct irregular variation according to described second carries out geometry school to test grid image signal
Just, by the grid image signal projection after geometric correction on the display screen；
The rest may be inferred, until completing the adjustment at all positions there are irregular variation.
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| CN201710323172.6A CN108012129B (en) | 2017-05-09 | 2017-05-09 | Method for adjusting special-shaped image |
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| CN201710323172.6A CN108012129B (en) | 2017-05-09 | 2017-05-09 | Method for adjusting special-shaped image |
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| CN108012129B CN108012129B (en) | 2020-11-03 |
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Cited By (3)
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| CN110996083A (en) * | 2019-12-19 | 2020-04-10 | 成都极米科技股份有限公司 | Trapezoidal correction method and device, electronic equipment and readable storage medium |
| CN111918043A (en) * | 2019-05-10 | 2020-11-10 | 中强光电股份有限公司 | Projection system, projection screen adjusting method and projector |
| CN112637575A (en) * | 2020-12-14 | 2021-04-09 | 四川长虹电器股份有限公司 | Automatic image correction system and method for ultra-short-focus laser projector |
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