CN109410140A - A kind of distortion correction method, device, system and computer readable storage medium - Google Patents
A kind of distortion correction method, device, system and computer readable storage medium Download PDFInfo
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Abstract
This application provides a kind of distortion correction methods, device, system and computer readable storage medium, the image shown for correction display equipment, the display equipment includes display screen and the optical element positioned at the display screen light emission side, wherein distortion correction method is by carrying out the second Corner Detection and judgement to the second fault image acquired, it will be unsatisfactory for the second angle point of preset condition, corresponding first angle point of the second angle point for namely making the degree of distortion of the second fault image be greater than the first preset threshold is adjusted, determine that the first angle point the first fault image adjusted is the distortion correction image that display screen is shown, to complete to show the correction of image to display equipment, promote the viewing experience of user.
Description
Technical field
The present invention relates to field of display technology, can more particularly to a kind of distortion correction method, device, system and computer
Read storage medium.
Background technique
In order to allow user visually to possess true feeling of immersion, VR distortion correction system will cover human eye as far as possible
Visual range.To obtain big field angle, can be put into VR equipment by a big curved spherical display come real
It is existing, but this method is heavy and expensive.Another light, cheap solution is by showing in a small rectangle
Increase a lens before screen, then by this display screen from the point of view of lens, to obtain bigger visual angle, mainstream at present
VR equipment is all this method selected.
But when being projected normal image in human eye using lens, the image observed is distortion distortion, human eye
It just has no idea to obtain the positioning in Virtual Space, because surrounding is the image of distortion distortion.Moreover, in virtual display device
Distortion caused by lens is inevitable, and with the increase of FOV (field angle), edge image distortion can be more obvious.
Summary of the invention
The present invention provides and a kind of distortion correction method, device, system and computer readable storage medium, to set to display
The image of standby display is corrected, and promotes the viewing experience of user.
To solve the above-mentioned problems, the invention discloses a kind of distortion correction methods, show for correction display equipment
Image, the display equipment includes display screen and the optical element positioned at the display screen light emission side, the distortion correction side
Method includes:
Second fault image of first fault image after the optical element is obtained, first fault image is institute
The image that display screen is shown is stated, first fault image has multiple first angle points；
Detect the second angle point corresponding with first angle point on second fault image；
Judge whether second angle point meets preset condition, the preset condition is the distortion of second fault image
Degree is less than or equal to the first preset threshold；
Adjustment is unsatisfactory for corresponding first angle point of the second angle point of the preset condition, by the first angle point adjusted first
Fault image is determined as the distortion correction image that the display screen is shown.
Optionally, the step of second fault image for obtaining the first fault image after the optical element, packet
It includes:
Receive third fault image of first fault image of shooting unit shooting after the optical element；
According to the internal reference of the shooting unit, the third fault image is corrected, obtains second distortion figure
Picture.
Optionally, the distortion correction method further include:
The camera site of the shooting unit is adjusted, is shown with obtaining display screen described in the corresponding multiple groups in multiple camera sites
Distortion correction image, and position coordinates of the first angle point in the distortion correction image shown to display screen described in the multiple groups
It is averaged, obtains target distortion correction image.
It is optionally, described that the step of whether second angle point meets preset condition judged, comprising:
Determine the central point of second fault image, and the benchmark on the predetermined arragement direction of second angle point
Line；
When the slope of line between two the second angle points of the arbitrary neighborhood on the predetermined arragement direction, with the base
When difference between the slope of directrix is greater than the second preset threshold, the second of the separate central point in described two second angle points
Angle point is unsatisfactory for the preset condition.
Optionally, the central point of the determination second fault image, and the predetermined arrangement along second angle point
The step of reference line on direction, comprising:
Determine that the second angle point for being located at second fault image center is the central point, along the pre- of second angle point
Determine on arragement direction, the line between the second angle point and the central point adjacent with the central point is the predetermined arrangement side
Upward reference line.
Optionally, described the step of adjusting the second angle point corresponding first angle point for being unsatisfactory for the preset condition, comprising:
Determine offset direction of the line between described two second angle points relative to the reference line；
Corresponding first angle point of the second angle point that will be unsatisfactory for the preset condition, to the direction for deviating from the offset direction
Adjustment, and continue to execute second fault image for obtaining the first fault image after the optical element, the detection
The second angle point corresponding with first angle point and described judge whether second angle point is full on second fault image
The step of sufficient preset condition, until the second angle point step corresponding with first angle point on detection second fault image
Suddenly it detects the second obtained angle point and is all satisfied the preset condition, the first angle point the first fault image adjusted is determined as institute
State the distortion correction image that display screen is shown.
Optionally, first fault image is barrel distortion image.
To solve the above-mentioned problems, the invention also discloses a kind of distortion correction devices, show for correction display equipment
Image, the display equipment includes display screen and the optical element positioned at the display screen light emission side, the distortion correction
Device includes:
Image collection module is configured as obtaining second distortion figure of first fault image after the optical element
Picture, first fault image are the image that the display screen is shown, first fault image has multiple first angle points；
Corner Detection module is configured as detecting second jiao corresponding with first angle point on second fault image
Point；
Angle point judgment module, is configured as judging whether second angle point meets preset condition, and the preset condition is
The degree of distortion of second fault image is less than or equal to the first preset threshold；
Image adjustment module is configured as corresponding first angle point of the second angle point that adjustment is unsatisfactory for the preset condition,
First angle point the first fault image adjusted is determined as the distortion correction image that the display screen is shown.
Optionally, described image acquisition module includes:
Receiving unit is configured as receiving first fault image of shooting unit shooting after the optical element
Third fault image；
Unit is corrected, the internal reference according to the shooting unit is configured as, the third fault image is corrected, is obtained
To second fault image.
Optionally, the distortion correction device further include:
Position adjusting type modules are configured as adjusting the camera site of the shooting unit, to obtain multiple camera sites pair
The distortion correction image that display screen described in the multiple groups answered is shown, and to the distortion correction image that display screen described in the multiple groups is shown
In the position coordinates of the first angle point be averaged, obtain target distortion correction image.
Optionally, the angle point judgment module includes:
Benchmark determination unit is configured to determine that the central point of second fault image, and along second angle point
Predetermined arragement direction on reference line；
Straight line judging unit, be configured as when arbitrary neighborhood on the predetermined arragement direction two the second angle points it
Between difference between the slope of line and the slope of reference line when being greater than the second preset threshold, in described two second angle points
The second angle point far from the central point is unsatisfactory for the preset condition.
Optionally, the benchmark determination unit is configured to determine that second jiao positioned at second fault image center
Point is the central point, along the predetermined arragement direction of second angle point, second angle point adjacent with the central point and institute
Stating the line between central point is the reference line on the predetermined arragement direction.
Optionally, described image adjustment module includes:
Deviate determination unit, is configured to determine that the line between described two second angle points relative to the reference line
Offset direction；
Angle point adjustment unit is configured as that corresponding first angle point of the second angle point of the preset condition will be unsatisfactory for, to
It is adjusted away from the direction of the offset direction, and continues that described image is called to obtain module, the Corner Detection module and institute
Angle point judgment module is stated, until the second angle point that the Corner Detection module detects is all satisfied the preset condition, by
One angle point the first fault image adjusted is determined as the distortion correction image that the display screen is shown.
To solve the above-mentioned problems, the invention also discloses a kind of distortion correction systems, comprising:
Show equipment, the display equipment includes display screen and the optical element positioned at the display screen light emission side；
Shooting unit deviates from the side of the display screen positioned at the optical element；
Dressing plate, for fixing the display equipment and the shooting unit；
Controller is connect with the display screen of the display equipment and the shooting unit respectively, and the controller includes
Distortion correction device described in any embodiment.
To solve the above-mentioned problems, the invention also discloses a kind of computer readable storage mediums, described computer-readable
Computer program is stored on storage medium, and distortion described in any embodiment is realized when the computer program is executed by processor
The step of bearing calibration.
Compared with prior art, the present invention includes the following advantages:
This application provides a kind of distortion correction method, device, system and computer readable storage mediums, wherein school of distorting
Correction method is used for the image that correction display equipment is shown, the display equipment includes display screen and goes out light positioned at the display screen
The optical element of side, specifically includes: obtain second fault image of first fault image after the optical element, described the
One fault image is the image that the display screen is shown, first fault image has multiple first angle points；Detect described
The second angle point corresponding with first angle point on two fault images；Judge whether second angle point meets preset condition, institute
It states the degree of distortion that preset condition is second fault image and is less than or equal to the first preset threshold；It will be unsatisfactory for the default item
Corresponding first angle point of second angle point of part is adjusted, and the first fault image adjusted is determined as the display screen and is shown
Distortion correction image.By carrying out the second Corner Detection and judgement to the second fault image acquired, will be unsatisfactory for pre-
If the second angle point of condition, that is, the second angle point for making the degree of distortion of the second fault image be greater than the first preset threshold are corresponding
First angle point is adjusted, and determines that the first fault image adjusted is the distortion correction image that display screen is shown, to complete
The correction that image is shown to display equipment, promotes the viewing experience of user.
Detailed description of the invention
In order to illustrate the technical solution of the embodiments of the present invention more clearly, below by institute in the description to the embodiment of the present invention
Attached drawing to be used is needed to be briefly described, it should be apparent that, the accompanying drawings in the following description is only some implementations of the invention
Example, for those of ordinary skill in the art, without any creative labor, can also be according to these attached drawings
Obtain other attached drawings.
Fig. 1 shows a kind of step flow chart of distortion correction method of one embodiment of the application offer；
Fig. 2 a shows a kind of step flow chart of the second fault image of acquisition of one embodiment of the application offer；
Fig. 2 b shows the schematic diagram of the first fault image of one kind of one embodiment of the application offer；
Fig. 2 c shows a kind of schematic diagram of third fault image of one embodiment of the application offer；
Fig. 2 d shows the schematic diagram of the second fault image of one kind of one embodiment of the application offer；
Fig. 3 shows a kind of step for judging second angle point and whether meeting preset condition of one embodiment of the application offer
Rapid flow chart；
The second angle point that a kind of adjustment that Fig. 4 shows the offer of one embodiment of the application is unsatisfactory for the preset condition is corresponding
The first angle point step flow chart；
Fig. 5 a shows the schematic diagram of the first offset direction of one embodiment of the application offer；
Figure 5b shows that the schematic diagrames for second of offset direction that one embodiment of the application provides；
Fig. 5 c shows the schematic diagram of the third offset direction of one embodiment of the application offer；
Fig. 5 d shows the schematic diagram of the first angle point adjustment direction of one embodiment of the application offer；
Fig. 6 shows a kind of structural block diagram of distortion correction device of one embodiment of the application offer；
Fig. 7 shows a kind of structural schematic diagram of distortion correction system of one embodiment of the application offer.
Specific embodiment
In order to make the foregoing objectives, features and advantages of the present invention clearer and more comprehensible, with reference to the accompanying drawing and specific real
Applying mode, the present invention is described in further detail.
Referring to Fig.1, one embodiment of the application provides a kind of distortion correction method, the figure shown for correction display equipment
Picture, as shown in fig. 7, display equipment includes display screen and the optical element positioned at display screen light emission side, the distortion correction method
May include:
Step 101: obtaining second fault image of first fault image after optical element, the first fault image is aobvious
The image that display screen is shown, the first fault image have multiple first angle points.
Specifically, the first fault image can be by disclosed bearing calibration, such as passes through zemax simulation softward or linear
Approximating method etc., the structure according to display equipment is pre-generated, the position of the first angle point in the first pre-generated fault image
It is known for setting (such as pixel coordinate).
First fault image can also be the anti-fault image of theory generated according to the theoretical distortion parameter of optical element, example
It such as can be barrel distortion image, barrel distortion image can specifically include barrel distortion grid or barrel distortion angle point etc..
When the first fault image is barrel distortion grid or barrel distortion angle point, the efficiency of distortion correction can be improved.
In practical applications, display screen shows the first fault image, can pass through shooting unit such as camera or camera etc.
Acquire second fault image of first fault image after optical element.
Wherein, display equipment can be virtual reality device VR etc., and optical element may include one or more lens etc..
Step 102: the second angle point corresponding with the first angle point on the second fault image of detection.
It specifically, include more on corresponding second fault image due to having multiple first angle points on the first fault image
A the second angle point corresponding with the first angle point.The position detection of second angle point can be using the angle of the offers such as open source library such as opencv
Matching algorithm is spent to carry out.Corresponding relationship between first angle point and the second angle point for example can be according to opposite between the first angle point
Relative position between position and the second angle point determines.
Step 103: judging whether the second angle point meets preset condition, preset condition is that the degree of distortion of the second fault image is small
In or equal to the first preset threshold.
When the second angle point meets preset condition, the degree of distortion of the second fault image is less than or equal to the first preset threshold.
In practical applications, for example, when the distance between the second angle point and preset reference point are less than or equal to pre-determined distance or second
When angle between line between angle point and preset reference line is less than or equal to default angle, it is possible to determine that the second angle point meets
Preset condition.Wherein, the degree of distortion is used to characterize the distortion degree of the second fault image, the first preset threshold (such as pre-determined distance or
Default angle etc.) it can be set by those skilled in the art according to actual conditions such as the structures of display equipment and user demand
Fixed, the application is not construed as limiting its specific value.
Specifically, preset condition can there are many types, as long as ensuring that the degree of distortion of the second fault image is less than or equal to
First preset threshold.The degree of distortion of second fault image is smooth vertical and horizontal with the second angle point arrangement in the second fault image
Degree or straightness are inversely proportional.
Step 104: adjustment is unsatisfactory for corresponding first angle point of the second angle point of preset condition, and the first angle point is adjusted
First fault image is determined as the distortion correction image that display screen is shown.
Specifically, according to the corresponding relationship between the first angle point and the second angle point, determination is unsatisfactory for the second of preset condition
First angle point corresponding to angle point, the position etc. of adjustable first angle point, the first fault image adjusted can be used as
Distortion correction image, to reduce the degree of distortion of the second fault image.
Distortion correction method provided in this embodiment, by carrying out the second angle point inspection to the second fault image acquired
It surveys and judges, the second angle point of preset condition will be unsatisfactory for, that is, so that the degree of distortion of the second fault image is greater than first and preset
Corresponding first angle point of second angle point of threshold value is adjusted, and it is abnormal to determine that the first fault image adjusted shows for display screen
Become correction image, to complete the correction for showing image to display equipment, promotes the viewing experience of user.
Referring to Fig. 2 a, provides and obtain the first fault image in above-described embodiment step 101 after the optical element
The second fault image a kind of implementation, can specifically include:
Step 201: receiving third fault image of the first fault image of shooting unit shooting after optical element.
Specifically, third fault image is the figure that the first fault image obtains after optical element and shooting unit
Picture is equivalent to the camera lens bring distortion that optical element and shooting unit are increased on the first fault image.
Step 202: according to the internal reference of shooting unit, third fault image being corrected, obtains the second fault image.
Specifically, shooting unit can be the equipment that camera etc. has shooting function.It in practical applications, can basis
The internal reference of camera is corrected the third fault image that camera is shot, and is being shot with eliminating by cam lens
Caused distortion when image.Wherein, the internal reference of shooting unit such as camera can be marked by being demarcated to obtain to camera
The method of determining can be using Zhang Zhengyou method etc..
When the first fault image shown on screen is barrel distortion grid (referring to Fig. 2 b), barrel-type distortion grid passes through
The third fault image that optical element and shooting unit are shot may be pincushion distortion grid (referring to Fig. 2 c), further according to bat
The internal reference for taking the photograph unit is corrected third fault image, available second fault image (referring to Fig. 2 d).
When first fault image is barrel distortion grid, the first angle point is the friendship of any two lines in barrel distortion grid
Point, barrel-type distortion grid shown in Fig. 2 b include 5*5 the first angle points.It correspondingly, include 5*5 the on the second fault image
Two angle points, as shown in Figure 2 d.Second angle point can calculate any two lines on the second fault image by way of image procossing
I.e. the second angle point of intersection point position (such as pixel coordinate), calculation method can using open source library (such as opencv) provide angle
Spend matching algorithm isogonism point detecting method.
According to the relative position between the second angle point detected and the relative position between known first angle point, lead to
The corresponding relationship of the two can be obtained by crossing comparison.For example, the corresponding relationship on four vertex can be determined first, such as upper left in Fig. 2 b
The point 1 at angle is corresponding with the point 1 ' in the upper left corner in Fig. 2 d, if the point 2 ' in the upper right corner is corresponding in the point 2 with Fig. 2 d in the upper right corner in Fig. 2 b,
If the point 3 ' in the lower left corner is corresponding in the point 3 with Fig. 2 d in the lower left corner in Fig. 2 b, such as the lower right corner in the point 4 Yu Fig. 2 d in the lower right corner in Fig. 2 b
Point 4 ' it is corresponding, and as the central point 0 in Fig. 2 b is corresponding with the central point 0 ' in Fig. 2 d.It then can be according to other first jiaos
Point and the relative positional relationship and other second angle points of vertex or central point and the relative positional relationship of vertex or central point into
Row corresponds to, to obtain the corresponding relationship between each second angle point and the first angle point.
Referring to Fig. 3, provides and judge whether second angle point meets the one of preset condition in above-described embodiment step 103
Kind implementation, can specifically include:
Step 301: determining the central point of the second fault image, and the benchmark on the predetermined arragement direction of the second angle point
Line.
Specifically, the point centered on second angle point at the second fault image center can be determined, as shown in Figure 2 d the
Point centered on 0 ' point in two fault images.
Predetermined arragement direction can be any one in multiple arragement directions between the second angle point, for example, point 5 ', 0 ' and
The direction of 6 ' arrangements is horizontal arrangement direction, and the direction of 8 ', 0 ' and 7 ' arrangement of point is vertical arragement direction, 0 ', 9 ' and 1 ' row of point
The direction of cloth is diagonal arragement direction etc..
Can will be along predetermined arragement direction, line between the second angle point adjacent with central point and central point is as pre-
Determine the reference line on arragement direction, the straight line of such as 5 ', 0 ' and 6 ' fitting of point can be used as the reference line on horizontal arrangement direction, point
The straight line of 8 ', 0 ' and 7 ' fittings can be used as the reference line etc. on vertical arragement direction.
Step 302: when the slope and base of line between two the second angle points of the arbitrary neighborhood on predetermined arragement direction
When difference between the slope of directrix is greater than the second preset threshold, the second angle point far from central point is discontented in two the second angle points
Sufficient preset condition.
In practical applications, it such as can establish with central point 0 ' point as origin, (5 ', 0 ' and 6 ' is quasi- in horizontal arrangement direction
The rectilinear direction of conjunction) it is axis of abscissas, vertical arragement direction (rectilinear directions of 8 ', 0 ' and 7 ' fittings) is the coordinate of axis of ordinates
System.The slope of line between two the second angle points of arbitrary neighborhood can be determined according to the coordinate of the second angle point in the coordinate system
And the slope of said reference line.For example, when line between two the second angle points of the arbitrary neighborhood on horizontal arrangement direction
Slope, such as point 5 ' and 0 ', point 10 ' and 5 ' puts the slope of line between the adjacent corner points such as 11 ' and 8 ', with horizontal arrangement direction
The difference of the slope of upper reference line be greater than the second preset threshold, or along horizontal arrangement direction arbitrary neighborhood two the second angle points
Between line, such as point 5 ' and 0 ', point 10 ' and 5 ' puts 11 ' and 8 ' etc., when the line and the arragement direction between these angle points
When the angle of reference line is greater than third predetermined threshold value i.e. on horizontal arrangement direction, the second of separate central point in two the second angle points
Angle point is unsatisfactory for preset condition.When two angle points are 10 ' and 5 ', the second angle point far from central point is 10 '；When two angle points
When being 11 ' and 8 ', the second angle point far from central point is 11 '.Wherein, the second preset threshold and third predetermined threshold value can be by these
Field technical staff is determined according to actual conditions such as the structure of display equipment and viewing experiences, and the application is to its specific number
Value is not construed as limiting.Wherein, the line between angle point and reference line angle can be determined according to the slope of the line and reference line.
A kind of specific embodiment of above-mentioned steps 301 and step 302 in practical applications is described below:
Step 301S: creation location point adjustment mark b_IsMoved [W*H], W are lateral node in the second fault image
(the second angle point) number, H are longitudinal node (the second angle point) number, M=H=5 as shown in Figure 2 d in the second fault image.By position
It sets an initial value for adjustment mark and is all set to -1, i.e. b_IsMoved [i]=- 1, i=0 ', 1 ', 2 ' ... .W*H-1 '.
Step 302S: using 5 ', 0 ' and 6 ' fitting a straight lines, the reference line on horizontal arrangement direction is obtained, can also be led to
Cross establish coordinate system calculate the reference line slope be K_X；Using 8 ', 0 ' and 7 ' fitting a straight lines of point, vertical arragement direction is obtained
On reference line, can equally be calculated the reference line slope be K_Y.At this point, setting initial position adjusts mark b_
IsMoved [0 ']=1, b_IsMoved [j]=0, j=0 ', 5 ', 6 ', 7 ', 8 '.
Step 303S: traversal location point adjustment mark b_IsMoved.Wherein, the point of b_IsMoved [i]=- 1 is desirable
Carry out the point of slope or angle judgement；The point of b_IsMoved [i]=1 does not need to traverse；The point of b_IsMoved [i]=0 is to work as
Before the point that needs to be traversed for.
Due to 0 ' point b_IsMoved [0 ']=1 when, 0 ' o'clock does not need to traverse.
As b_IsMoved [m]=0 of certain point m, check that adjacent with m point 4 points of b_IsMoved up and down is
It is no to be equal to 1, if being equal to 1, traverse next point.If adjacent with m point 4 points of b_IsMoved up and down is not congruent to 1,
The slope between point and m point of the b_IsMoved not equal to 1 is then calculated, or calculates line and corresponding arragement direction between two o'clock
On reference line between angle.
For example, being calculated between m point and m_up point as b_IsMoved (m_up) ≠ 1 of the top point adjacent with m point
Angle theta _ up between the reference line of slope k _ between y_up or m point and m_up point on line and vertical arragement direction；When with m
When b_IsMoved (m_down) ≠ 1 of the adjacent lower section point of point, slope k _ y_down between m point and m_down point is calculated, or
Angle theta _ down between reference line between m point and m_down point on line and vertical arragement direction；When the right side adjacent with m point
When b_IsMoved (m_right) ≠ 1 just put, the slope k _ x_right or m point and m_ between m point and m_right point are calculated
Angle theta _ right between reference line between right point on line and horizontal arrangement direction；When the left point adjacent with m point
B_IsMoved (m_left) ≠ 1 when, calculate the slope k _ x_left or m point and m_left point between m point and m_left point
Between angle theta _ left between reference line on line and corresponding arragement direction.
As shown in Figure 2 d, the b_IsMoved [5 ']=0 of point 5 ', is the point currently needed to be traversed for, with 5 ' adjacent point b_ of point
IsMoved value is respectively as follows: b_IsMoved [0 ']=1, b_IsMoved [9 ']=- 1, b_IsMoved [10 ']=- 1, b_
IsMoved [11 ']=- 1.Due to 0 ' value=1 point b_IsMoved, do not need to carry out slope or angle judgement.
Slope k _ y_up between 5 ' and 9 ', slope k _ y_down between 5 ' points and 11 ' points can be calculated；And 5 ' point
With slope k _ x_left between 10 ' points.Then judge respectively k_y_up or k_y_down whether within the scope of K_Y ± R, k_
Whether x_left is within the scope of K_X ± R；If so, setting b_IsMoved [5 ']=1, b_IsMoved [9 ']=0, b_IsMoved
[10 ']=0, b_IsMoved [11 ']=0, and continue to traverse next point；If it is not, then corresponding points (such as 9 ', 10 ' or 11 ') are discontented
Sufficient preset condition, corresponding first angle point need to adjust.Wherein desirable 0.1,0.2 etc. R, sets with specific reference to actual conditions
Fixed, the application is not construed as limiting its specific value.
Can also calculate angle theta _ up between the reference line of the line and vertical arragement direction between 5 ' and 9 ', 5 ' points with
Line between 11 ' points and the point of angle theta _ down and 5 ' between the reference line of vertical arragement direction and the company between 10 ' points
Angle theta _ left between line and the reference line in horizontal arrangement direction.Then judge whether θ _ down, θ _ up or θ _ left are less than
Or it is equal to third predetermined threshold value θ th；If so, setting b_IsMoved [5 ']=1, b_IsMoved [9 ']=0, b_IsMoved
[10 ']=0, b_IsMoved [11 ']=0, and continue to traverse next point；If it is not, then respective point (such as 9 ', 10 ' or 11 ') is discontented
Sufficient preset condition, corresponding first angle point need to adjust.
In this implementation, referring to Fig. 4, step 104 be can specifically include in above-described embodiment:
Step 401: determining offset direction of the line between two the second angle points relative to reference line.
Specifically, referring to Fig. 2 d, when being unsatisfactory for preset condition 9 ' o'clock, it is assumed that the line between 5 ' and 9 ' is relative to vertical
The offset direction of reference line y on arragement direction is deflection clockwise, as shown in Figure 5 a.When being unsatisfactory for preset condition 11 ' o'clock,
Assuming that the line between 5 ' and 11 ' is deflection counterclockwise relative to the offset direction of the reference line y on vertical arragement direction, such as scheme
Shown in 5b.When being unsatisfactory for preset condition 10 ' o'clock, it is assumed that the line between 5 ' and 10 ' is relative to the base on horizontal arrangement direction
The offset direction of directrix x is deflection clockwise, as shown in Figure 5 c.
Step 402: corresponding first angle point of the second angle point that preset condition will be unsatisfactory for, to the direction for deviating from offset direction
Adjustment, is determined as the distortion correction image that display screen is shown for the first angle point the first fault image adjusted.
For example, referring to Fig. 5 a, preset condition is unsatisfactory for when 9 ' o'clock, and the line between 5 ' and 9 ' is relative to vertical arrangement side
The offset direction of upward reference line y be clockwise, at this time can be by corresponding first angle point of the second angle point 9 ' to the inverse time
The adjustment of needle direction, so that reference line of the line between the second angle point 5 ' and 9 ' adjusted on vertical arragement direction, from
And reduce the degree of distortion of the second fault image.
Specifically, it will be unsatisfactory for corresponding first angle point of the second angle point (such as 9 ', 10 ' or 11 ') of preset condition, to deviating from
It after the direction adjustment of offset direction, can also continue to execute step 101, step 102 and step 103, until step 102 detects
The second obtained angle point is all satisfied preset condition, and the first fault image adjusted is determined as the distortion correction that display screen is shown
Image, and the distortion correction image is exported and saved.The distortion correction image is shown on a display screen, it can be ensured that the
The degree of distortion of two fault images is less than or equal to the first preset threshold, and the image that user sees when viewing shows equipment is substantially
Non-distorted distortion.
After adjustment, can be set b_IsMoved [5 ']=1, b_IsMoved [9 ']=0, b_IsMoved [10 ']=
0, b_IsMoved [11 ']=0.Make a little 5 ' no longer to adjust, point 9 ', 10 ', 11 ' becomes the traversal point of next time.
It should be noted that if the point of traversal then need to only calculate and the point without point adjacent up and down, such as point 1 '
Adjacent point, as long as calculating the right point and lower point of 1 ' point.
In addition, the mode being adjusted to corresponding first angle point of the second angle point for not meeting preset condition is not limited only to
Side up and down adjusts upward, and can also be moved on the point and the direction of central point line, as fig 5d.
In order to reduce correction error, the accuracy of correction is improved, another embodiment of the application provides a kind of distortion correction
Method can also include: on the basis of the various embodiments described above
The camera site of shooting unit is adjusted, to obtain the distortion school that the corresponding multiple groups display screen in multiple camera sites is shown
Positive image, and the position coordinates of the first angle point in the distortion correction image that shows of the display screen described in multiple groups are averaged, and obtain
To target distortion correction image.
When the first fault image is barrel distortion grid, by repeatedly adjusting the position of shooting unit such as camera, and
Above-mentioned steps 101 to 104 are executed, multiple groups distortion correction grid can be obtained, then to first jiao on multiple groups distortion correction grid
Point position (such as pixel coordinate) averaged, obtains target distortion correction image.Show that the target distorts on a display screen
When correcting image, it can be ensured that the grid on the second fault image that user sees when viewing shows equipment is straight line.
In another embodiment of the application, a kind of distortion correction device, the figure shown for correction display equipment are additionally provided
Picture, display equipment includes display screen and the optical element positioned at display screen light emission side, and referring to Fig. 6, distortion correction device can be with
Include:
Image collection module 601 is configured as obtaining second fault image of first fault image after optical element,
First fault image is the image that display screen is shown, the first fault image has multiple first angle points.
Specifically, the first fault image can be by disclosed bearing calibration, such as pass through zemax simulation softward or linear
Approximating method etc., the structure according to display equipment is pre-generated, the position of the first angle point in the first pre-generated fault image
It is known for setting (such as pixel coordinate).
First fault image can also be the anti-fault image of theory generated according to the theoretical distortion parameter of optical element, example
It such as can be barrel distortion image, barrel distortion image can specifically include barrel distortion grid or barrel distortion angle point etc..
When the first fault image is barrel distortion grid or barrel distortion angle point, the efficiency of distortion correction can be improved.
In practical applications, display screen shows the first fault image, and image collection module 601 can be by shooting unit such as
Camera or camera etc. acquire second fault image of first fault image after optical element.
Wherein, display equipment can for virtual reality device VR etc., optical element may include one or more lens with
And concave mirror etc..
Corner Detection module 602 is configured as the second angle point corresponding with the first angle point on the second fault image of detection.
It include multiple due to having multiple first angle points on the first fault image, on corresponding second fault image with first
Corresponding second angle point of angle point.Corner Detection module 602 can be using open source library such as opencv to the position detection of the second angle point
The angle automatching algorithm of equal offers carries out.Corresponding relationship between first angle point and the second angle point for example can be according to the first angle point
Between relative position and the second angle point between relative position determine.
Angle point judgment module 603 is configured as judging whether the second angle point meets preset condition, and preset condition is second abnormal
The degree of distortion for becoming image is less than or equal to the first preset threshold.
When the second angle point meets preset condition, the degree of distortion of the second fault image is less than or equal to the first preset threshold.
In practical applications, for example, when the distance between the second angle point and preset reference point are less than or equal to pre-determined distance or second
When angle between line between angle point and preset reference line is less than or equal to default angle, it is possible to determine that the second angle point meets
Preset condition.Wherein, the degree of distortion is used to characterize the distortion degree of the second fault image, the first preset threshold (such as pre-determined distance or
Default angle etc.) it can be set by those skilled in the art according to actual conditions such as the structures of display equipment and user demand
Fixed, the application is not construed as limiting its specific value.
Specifically, preset condition can there are many types, as long as ensuring that the degree of distortion of the second fault image is less than or equal to
First preset threshold.The degree of distortion of second fault image is smooth vertical and horizontal with the second angle point arrangement in the second fault image
Degree or straightness are inversely proportional.
Image adjustment module 604 is configured as corresponding first angle point of the second angle point that adjustment is unsatisfactory for preset condition, will
First angle point the first fault image adjusted is determined as the distortion correction image that display screen is shown.
Specifically, according to the corresponding relationship between the first angle point and the second angle point, determination is unsatisfactory for the second of preset condition
First angle point corresponding to angle point, the position etc. of adjustable first angle point of image adjustment module 604, adjusted first is abnormal
Becoming image can be used as distortion correction image, to reduce the degree of distortion of the second fault image.
In a kind of implementation, image collection module 601 may include:
Receiving unit 6011 is configured as receiving the of the first fault image of shooting unit shooting after optical element
Three fault images.
Unit 6012 is corrected, the internal reference according to shooting unit is configured as, third fault image is corrected, obtains the
Two fault images.
In a kind of implementation, angle point judgment module 603 may include:
Benchmark determination unit 6031 is configured to determine that the central point of the second fault image, and along the pre- of the second angle point
Determine the reference line on arragement direction.
In practical applications, benchmark determination unit 6031 is specifically configured to determine positioned at the second fault image center
Point centered on second angle point, along the predetermined arragement direction of the second angle point, second angle point adjacent with central point and central point it
Between line be predetermined arragement direction on reference line.
Straight line judging unit 6032, be configured as when arbitrary neighborhood on predetermined arragement direction two the second angle points it
Between difference between the slope of line and the slope of reference line when being greater than the second preset threshold, far from center in two the second angle points
Second angle point of point is unsatisfactory for preset condition.
In this implementation, image adjustment module 604 may include:
Deviate determination unit 6041, is configured to determine that deviation of the line between two the second angle points relative to reference line
Direction.
Angle point adjustment unit 6042 is configured as that corresponding first angle point of the second angle point of preset condition will be unsatisfactory for, to
It is adjusted away from the direction of offset direction, and continues to call image collection module, Corner Detection module and angle point judgment module, directly
It is all satisfied preset condition to the second angle point that Corner Detection module detects, by the first angle point the first fault image adjusted
It is determined as the distortion correction image that display screen is shown.
In order to reduce correction error, the accuracy of correction is improved, the distortion correction device in above-described embodiment can also wrap
It includes:
Position adjusting type modules 605 are configured as the camera site of adjustment shooting unit, corresponding to obtain multiple camera sites
The distortion correction image that shows of multiple groups display screen, and first jiao in the distortion correction image that shows of the display screen described in multiple groups
The position coordinates of point are averaged, and target distortion correction image is obtained.
In order to improve correction efficiency, the first fault image in above-described embodiment can be barrel distortion image.
Distortion correction device provided in this embodiment, may be implemented above-mentioned distortion correction method embodiment each process and
Effect, to avoid repeating, which is not described herein again.
Another embodiment of the application additionally provides a kind of distortion correction system, referring to Fig. 7, may include:
Equipment 71 is shown, including display screen 711 and positioned at the optical element 712 of 711 light emission side of display screen；Shooting unit
72, the side of display screen 711 is deviated from positioned at optical element 712；Dressing plate 73 is used for fixed display devices 71 and shooting unit
72；Controller 74 is connect with the display screen 711 of display equipment 71 and shooting unit 72 respectively, and controller 74 includes above-mentioned
Distortion correction device described in one embodiment.
Wherein, dressing plate may include substrate 731, display fixing device 732 and the fixed device of shooting unit
733。
Controller 74 can be PC computer etc.；Show that equipment can be VR equipment to be corrected etc.；Shooting unit can be to take the photograph
As head etc..Specifically, PC computer connects VR equipment to be corrected to control the display content of VR equipment to be corrected, it is connect with camera
To receive the image of camera shooting.
The content that VR equipment to be corrected is shown can be controlled by controller 74, and camera is shown for shooting VR equipment to be corrected
Image and be sent to controller 74.Dressing plate 73 needs to the greatest extent for fixing VR equipment to be corrected and camera in correction course
Amount ensures camera center, and center of optical element and display screen center are point-blank.
In another embodiment of the application, a kind of computer readable storage medium, the computer-readable storage are additionally provided
Computer program is stored on medium, and any described in the embodiment of the present invention is realized when the computer program is executed by processor
The step of kind distortion correction method.
The embodiment of the present application provides a kind of distortion correction method, device, system and computer readable storage medium, wherein
Distortion correction method is used for the image that show of correction display equipment, and the display equipment includes display screen and positioned at the display
The optical element for shielding light emission side, specifically includes: second fault image of first fault image after the optical element is obtained,
First fault image is the image that the display screen is shown, first fault image has multiple first angle points；Detection
The second angle point corresponding with first angle point on second fault image；Judge whether second angle point meets default item
Part, the preset condition are that the degree of distortion of second fault image is less than or equal to the first preset threshold；It will be unsatisfactory for described
Corresponding first angle point of second angle point of preset condition is adjusted, and the first fault image adjusted is determined as the display
Shield the distortion correction image of display.It, will not by carrying out the second Corner Detection and judgement to the second fault image acquired
Meet the second angle point of preset condition, that is, the second angle point for making the degree of distortion of the second fault image be greater than the first preset threshold
Corresponding first angle point is adjusted, and determines that the first fault image adjusted is the distortion correction image that display screen is shown, from
And the correction that image is shown to display equipment is completed, promote the viewing experience of user.
All the embodiments in this specification are described in a progressive manner, the highlights of each of the examples are with
The difference of other embodiments, the same or similar parts between the embodiments can be referred to each other.
Finally, it is to be noted that, herein, relational terms such as first and second and the like be used merely to by
One entity or operation are distinguished with another entity or operation, without necessarily requiring or implying these entities or operation
Between there are any actual relationship or orders.Moreover, the terms "include", "comprise" or its any other variant meaning
Covering non-exclusive inclusion, so that the process, method, commodity or the equipment that include a series of elements not only include that
A little elements, but also including other elements that are not explicitly listed, or further include for this process, method, commodity or
The intrinsic element of equipment.In the absence of more restrictions, the element limited by sentence "including a ...", is not arranged
Except there is also other identical elements in process, method, commodity or the equipment for including the element.
Above to a kind of distortion correction method provided by the present invention, device, system and computer readable storage medium into
It has gone and has been discussed in detail, used herein a specific example illustrates the principle and implementation of the invention, the above implementation
The explanation of example is merely used to help understand method and its core concept of the invention；Meanwhile for the general technology people of this field
Member, according to the thought of the present invention, there will be changes in the specific implementation manner and application range, in conclusion this explanation
Book content should not be construed as limiting the invention.
Claims (15)
1. a kind of distortion correction method, which is characterized in that for the image that correction display equipment is shown, the display equipment includes
Display screen and optical element positioned at the display screen light emission side, the distortion correction method include:
Second fault image of first fault image after the optical element is obtained, first fault image is described aobvious
The image that display screen is shown, first fault image have multiple first angle points；
Detect the second angle point corresponding with first angle point on second fault image；
Judge whether second angle point meets preset condition, the preset condition is that the degree of distortion of second fault image is small
In or equal to the first preset threshold；
Adjustment is unsatisfactory for corresponding first angle point of the second angle point of the preset condition, by the first distortion adjusted of the first angle point
Image is determined as the distortion correction image that the display screen is shown.
2. distortion correction method according to claim 1, which is characterized in that described in the first fault image of the acquisition passes through
The step of the second fault image after optical element, comprising:
Receive third fault image of first fault image of shooting unit shooting after the optical element；
According to the internal reference of the shooting unit, the third fault image is corrected, obtains second fault image.
3. distortion correction method according to claim 2, which is characterized in that the distortion correction method further include:
Adjust the camera site of the shooting unit, with obtain display screen described in the corresponding multiple groups in multiple camera sites show it is abnormal
Become correction image, and the position coordinates of the first angle point in the distortion correction image shown to display screen described in the multiple groups carry out
It is average, obtain target distortion correction image.
4. distortion correction method according to claim 1, which is characterized in that described to judge whether second angle point meets
The step of preset condition, comprising:
Determine the central point of second fault image, and the reference line on the predetermined arragement direction of second angle point；
When the slope of line between two the second angle points of the arbitrary neighborhood on the predetermined arragement direction, with the reference line
Slope between difference when being greater than the second preset threshold, far from the second angle point of the central point in described two second angle points
It is unsatisfactory for the preset condition.
5. distortion correction method according to claim 4, which is characterized in that in determination second fault image
Heart point, and the step of reference line on the predetermined arragement direction of second angle point, comprising:
Determine that the second angle point for being located at second fault image center is the central point, along the predetermined row of second angle point
On cloth direction, the line between the second angle point and the central point adjacent with the central point is on the predetermined arragement direction
Reference line.
6. distortion correction method according to claim 4, which is characterized in that the adjustment is unsatisfactory for the preset condition
The step of second angle point corresponding first angle point, comprising:
Determine offset direction of the line between described two second angle points relative to the reference line；
Corresponding first angle point of the second angle point that will be unsatisfactory for the preset condition, to the direction tune for deviating from the offset direction
It is whole, and continue to execute second fault image for obtaining the first fault image after the optical element, detection institute
It states on the second fault image the second angle point corresponding with first angle point and described judges whether second angle point meets
The step of preset condition, until the second angle point step corresponding with first angle point on detection second fault image
It detects the second obtained angle point and is all satisfied the preset condition, the first angle point the first fault image adjusted is determined as described
The distortion correction image that display screen is shown.
7. distortion correction method according to any one of claims 1 to 6, which is characterized in that first fault image is
Barrel distortion image.
8. a kind of distortion correction device, which is characterized in that for the image that correction display equipment is shown, the display equipment includes
Display screen and optical element positioned at the display screen light emission side, the distortion correction device include:
Image collection module is configured as obtaining second fault image of first fault image after the optical element, institute
Stating the first fault image is the image that the display screen is shown, first fault image has multiple first angle points；
Corner Detection module is configured as detecting the second angle point corresponding with first angle point on second fault image；
Angle point judgment module is configured as judging whether second angle point meets preset condition, and the preset condition is described
The degree of distortion of second fault image is less than or equal to the first preset threshold；
Image adjustment module is configured as adjustment and is unsatisfactory for corresponding first angle point of the second angle point of the preset condition, by the
One angle point the first fault image adjusted is determined as the distortion correction image that the display screen is shown.
9. distortion correction device according to claim 8, which is characterized in that described image obtains module and includes:
Receiving unit is configured as receiving the of first fault image of shooting unit shooting after the optical element
Three fault images；
Unit is corrected, the internal reference according to the shooting unit is configured as, the third fault image is corrected, institute is obtained
State the second fault image.
10. distortion correction device according to claim 9, which is characterized in that the distortion correction device further include:
Position adjusting type modules are configured as adjusting the camera site of the shooting unit, corresponding to obtain multiple camera sites
The distortion correction image that display screen described in multiple groups is shown, and in the distortion correction image shown to display screen described in the multiple groups
The position coordinates of first angle point are averaged, and target distortion correction image is obtained.
11. distortion correction device according to claim 8, which is characterized in that the angle point judgment module includes:
Benchmark determination unit is configured to determine that the central point of second fault image, and along the pre- of second angle point
Determine the reference line on arragement direction；
Straight line judging unit is configured as connecting when between two the second angle points of the arbitrary neighborhood on the predetermined arragement direction
It is separate in described two second angle points when difference between the slope of line and the slope of the reference line is greater than the second preset threshold
Second angle point of the central point is unsatisfactory for the preset condition.
12. distortion correction device according to claim 11, which is characterized in that the benchmark determination unit is configured as
Determine that the second angle point for being located at second fault image center is the central point, along the predetermined arrangement side of second angle point
Upwards, the line between the second angle point and the central point adjacent with the central point is the base on the predetermined arragement direction
Directrix.
13. distortion correction device according to claim 11, which is characterized in that described image adjusts module and includes:
Deviate determination unit, is configured to determine that deviation of the line between described two second angle points relative to the reference line
Direction；
Angle point adjustment unit is configured as that corresponding first angle point of the second angle point of the preset condition will be unsatisfactory for, to deviating from
The direction of the offset direction adjusts, and continues that described image is called to obtain module, the Corner Detection module and the angle
Point judgment module, until the second angle point that the Corner Detection module detects is all satisfied the preset condition, by first jiao
Point the first fault image adjusted is determined as the distortion correction image that the display screen is shown.
14. a kind of distortion correction system characterized by comprising
Show equipment, the display equipment includes display screen and the optical element positioned at the display screen light emission side；
Shooting unit deviates from the side of the display screen positioned at the optical element；
Dressing plate, for fixing the display equipment and the shooting unit；
Controller is connect with the display screen of the display equipment and the shooting unit respectively, and the controller includes right
It is required that 8 to 13 described in any item distortion correction devices.
15. a kind of computer readable storage medium, which is characterized in that store computer journey on the computer readable storage medium
Sequence realizes the step of the described in any item distortion correction methods of claim 1 to 7 when the computer program is executed by processor
Suddenly.
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