CN104182924A - Water surface image characteristic-based image deformation device and method thereof - Google Patents
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Abstract
The invention relates to a water surface image characteristic-based image deformation device, which comprises an initial module, a drawing module, an acquisition module, an adjusting module, a deformation module, a display module, and a judging module, wherein the initial module builds an initial simulation plane mirror; the drawing module carries out drawing and deformation on the plane mirror and a curved mirror is thus formed; the acquisition module acquires an input module; the adjusting module adjusts parameters of the input image and a position of an observation point; the deformation module carries out deformation on the input image via the curved mirror according to the mirror imaging rule to obtain a deformation image which is parallel projection of a curved image displayed in the curved mirror in an X0Y plane; the display module adjusts the size of the deformation image and displays the image; the judging module judges whether the deformation image to be the result needed by the user according to an instruction inputted by the user; and if the deformation image is the result needed by the user, the display module outputs the deformation image. According to the device and the method of the invention, complexity of deformation operation is reduced, and simple presentation of the same effect on different images can be realized.
Description
Technical field
The invention belongs to image processing field, relate in particular to a kind of anamorphose devices and methods therefor based on water surface imaging features.
Background technology
Morphing has two kinds of implications, a kind of referring between given two width images (source images and target image), by utilizing geometric transformation by their Fusion Features, and their color is carried out to hybrid interpolation, thereby set up a kind of continuous deformation process; Another kind of referring to according to certain warping function is mapped to target image to produce the local deformation of image by source images.
Figure deformation has very important status in image processing field, and in smooth continuous change process between the exaggeration special effect making in fields such as advertisement, video display, animation, game and key frame, anamorphose all plays key effect.
The research of image distortion method can be traced back to the sixties in 20th century the earliest, realization is from a width digital picture seamlessly transitting to another width, be the process of cross decomposition, the picture quality that this straightforward procedure generates is general, after this has again the deformation technology based on grid, territory, point.Listed as follows:
Morphing based on grid: late 1980s, Douglas Smythe has proposed the deformation method of mesh torsion in the making of film willow, the Remarkable Progress On Electric Artificial progress of morphing.The method is set up respectively grid on source images and target image, by pulling adjustment grid that corresponding with it image is deformed.Thus, user can directly control deformation effect, still, and may be very bothersome if change to target image.
The people such as the morphing based on territory: T.Beier propose the simple approach based on feature.The method is specific characteristic point or characteristic curve on two images, and sets up local coordinate system to produce the correspondence of feature, the then position of interpolation respective pixel and color.The method can make distortion smooth, but occurs sometimes ghost, and owing to adopting overall method, calculated amount is larger.
Morphing based on point: Rupercht etc. propose the anamorphose method based on scattered points interpolation, the method is specified the initial corresponding point of some on two images, then use these points of Interpolation Property of Radial Basis Function, thereby obtain the corresponding point of all the other points on image, but the calculated amount of this method is also larger.
In sum, conventional images deformation method mainly comprises:
1, first on source images and target image, mark the features such as grid or characteristic curve, unique point;
2, the position of the feature such as mobile grid, unique point, characteristic curve;
3,, according to the position of feature, according to certain interpolation algorithm, calculate deformation pattern.
Research for anamorphose at present mainly concentrates in the research of the interpolation algorithm being out of shape for different characteristic.
Known, existing morphing is not nearly all broken away from the control of deformation behaviour, before distortion, need first to mark feature, and then drive anamorphose by changing feature locations, and deformation effect can only be used in one group of image, its deformation process directly cannot be added on other image, so increased the complicacy of operation.
Summary of the invention
The invention provides a kind of anamorphose devices and methods therefor based on water surface imaging features, be intended to solve the problem that existing morphing exists: before distortion, need first to mark feature, and then drive anamorphose by changing feature locations, and deformation effect can only be used in one group of image, its deformation process directly cannot be added on other image, cause complicated operation.
Technical scheme provided by the invention is: a kind of anamorphose device based on water surface imaging characteristic, comprising: initial module, stretching module, acquisition module, adjusting module, deformation module, display module and judge module.Wherein, initial module is used for creating primary simulation level crossing; Stretching module, for described level crossing is carried out to stretcher strain, forms curved mirror; Acquisition module is used for obtaining input picture; Adjusting module is for adjusting the parameter of described input picture and the position of observation point; Deformation module, for described input picture being out of shape by mirror image rule by described curved mirror, to obtain deformation pattern, is surface chart picture shown in described curved mirror at the parallel projection of X0Y plane; Display module is for regulating the size of described deformation pattern and showing; Judge module is for judging according to the instruction of user's input whether described deformation pattern is the required result of user; Output module is for exporting described deformation pattern during for the required result of user at described deformation pattern.
Another technical scheme of the present invention is: a kind of image distortion method based on water surface imaging characteristic, comprising:
Step S1: create primary simulation level crossing;
Step S2: described level crossing is carried out to stretcher strain, form curved mirror;
Step S3: obtain input picture;
Step S4: adjust the parameter of described input picture and the position of observation point;
Step S5: described input picture is out of shape by mirror image rule by described curved mirror, to obtain deformation pattern Iout (x, y), is surface chart picture shown in described curved mirror at the parallel projection of X0Y plane;
Step S6: regulate the size of described deformation pattern and show;
Step S7: judge according to the instruction of user's input whether described deformation pattern is the required result of user;
If so, at step S8: export described deformation pattern.
Technical scheme tool of the present invention has the following advantages or beneficial effect: the anamorphose devices and methods therefor based on water surface imaging features in the present invention is by creating primary simulation level crossing and level crossing being out of shape and obtaining curved mirror, then utilize curved mirror shaping rule to be out of shape and to obtain deformation pattern image, effectively reduce the complicacy of deformation operation, and realized the simple reproduction of effect of the same race on different images.
Figure explanation
Fig. 1 is the module map of the anamorphose device based on water surface imaging features in an embodiment of the present invention;
Fig. 2 is cartesian coordinate system figure in the present invention;
Fig. 3 is initial simulation level crossing figure;
Fig. 4 is that curved mirror is at the index path at P point place;
Fig. 5 is that the RGB at the Po place of output pattern gets process;
Fig. 6 is the schematic diagram of the imaging on curved mirror;
Fig. 7 is the process flow diagram of the image distortion method based on water surface imaging features in an embodiment of the present invention.
Embodiment
In order to make object of the present invention, technical scheme and advantage clearer, below in conjunction with figure and embodiment, the present invention is further elaborated.Should be appreciated that specific embodiment described herein, only in order to explain the present invention, is not intended to limit the present invention.
Refer to Fig. 1, Fig. 1 is the module map of the anamorphose device 10 based on water surface imaging features in an embodiment of the present invention.
In the present embodiment, the anamorphose device 10 based on water surface imaging features comprises: initial module 102, stretching module 104, acquisition module 106, adjusting module 108, deformation module 110, display module 112, judge module 114, storer 116 and processor 118.Wherein, initial module 102, stretching module 104, acquisition module 106, adjusting module 108, deformation module 110, display module 112 and judge module 114 are stored in storer 116, and processor 118 is for the modules of execute store 116.
All coordinate systems relating to are all given tacit consent to cartesian coordinate system and its x, y, z direction signs as shown in Figure 2 in the present embodiment.
In the present embodiment, initial module 102 is for creating primary simulation level crossing Mi(x, y, z).
In the present embodiment, primary simulation level crossing is shown in Fig. 3, and the center of primary simulation level crossing is true origin 0, is positioned in X0Y plane, and four limits are parallel to respectively the rectangle of X, Y-axis, and wherein, the wide and height of rectangle is respectively W and H.In other embodiments of the present invention, primary simulation level crossing also can, for circular or other shapes, be not limited only to quadrilateral.
In the present embodiment, the mathematic(al) representation of simulation level crossing is: M
i(x, y, z)=0, z (x, y)=0 that satisfies condition, x ∈ [W/2, W/2], y ∈ [H/2, H/2].
In the present embodiment, stretching module 104, for described level crossing is carried out to stretcher strain, forms curved mirror Mf(x, y, z).
In the present embodiment, described stretching module 104, according to regulating the parameter described level crossing that stretches, forms described curved mirror, and the mathematic(al) representation of described curved mirror is M
f(x, y, z)=0, z (x, the y)=f (x, y) that satisfies condition, x ∈ [W/2, W/2], y ∈ [H/2, H/2], wherein, f (x, y) represents the z value size that point (x, y) is located.
In the present embodiment, f (x, y) requires everywhere continuous in field of definition, so the essence of stretching module 104 stretching level crossings is to change the depth value z that initial plane mirror is located at every point (x, y), makes it by a level crossing, convert curved mirror to.
Regulate on request level crossing, adjust exactly the concavo-convex of level crossing, allow it bring about the desired effect.According to optical principle, know, the picture that concave mirror becomes to amplify, the picture that convex mirror becomes to dwindle, therefore can allow it produce the effect that is necessarily similar to distorting mirror by regulating the parameters such as number, position and radius size of concave, convex face mirror, or the ripple of mimetic surface fluctuation.
In other embodiments of the present invention, concave, convex face mirror can be generalized to quadric surface mirror.
In the present embodiment, stretching module 104 stretching level crossings generally have three kinds of methods: 1, utilize existing PaintShop, as MATLAB etc.; 2, create the special adjustment means for this type of surf deform; 3, directly utilize surface equation, by setup parameter, in field of definition, calculate the value of Z=f (x, y).
Acquisition module 106 is for obtaining input picture.
In the present embodiment, the mathematic(al) representation of described input picture is: Iin (x, y), described input picture Iin(x, y) wide and height be respectively Wi and Hi, its functional value type is color RGB type.
Adjusting module 108 is for adjusting the parameter of described input picture and the position of observation point.
In the present embodiment, described image I in(x, y) parameter comprise the center Oi of image, image is around the anglec of rotation θ of z axle, the distance d of image distance X0Y plane, observation point S(x, y, z) represent, wherein, default image parameter is set to: I (x, y, z)=Iin (x, y), z (x, the y)=d that satisfies condition, x ∈ [Wi/2, Wi/2], y ∈ [Hi/2, Hi/2], the center that the position of acquiescence observation point is described image (0,0, d).
Deformation module 110, for described input picture being out of shape by mirror image rule by described curved mirror, to obtain deformation pattern Iout (x, y), is surface chart picture shown in described curved mirror at the parallel projection of X0Y plane.
In the present embodiment, deformation module 110 is according to the process shown in Fig. 4 and Fig. 5, by output image Iout (x, y) any point Po (x in field of definition, y) correspond to 1 P (x on curved mirror, y, z), Po.x=P.x should satisfy condition, Po.y=P.y, then the index path of pointing out at P according to minute surface shown in Fig. 4, crosses some P (x, y.z) and is curved mirror M
fthe normal vector of (x, y, z)=0, then with
for reflection ray, find out incident ray, if incident ray and input picture have intersection point Ps(x ', y '), the functional value I input picture being located at a Ps (x ', y ')
in(x', y') is assigned to output image at an I that Po (x, y) locates
out(
x,y), if incident ray and input picture without intersection point, output image sets to 0 at the functional value of this point.The concrete mathematic(al) representation of output image is:
For the Po that can find corresponding point Ps on input picture, as shown in Figure 5, above formula is also just equivalent to following formula:
Iout(Po
x,Po
y)=Iin(Ps
x,Ps
y)
Po is represented with function g () to the corresponding relation of Ps, and described function comprises: observation point S (x, y, z), curved mirror M
fthe distance d of (x, y, z)=0, image distance X0Y plane, image parameter (picture centre position O
i, image is around the anglec of rotation θ of z axle) and output image I
out(
x,y) some Po(x, y in field of definition) six variablees, above formula can be write as:
Iout(Po
x,Po
y)=Iin(g(S,M
f,d,O
i,θ,Po))
Display module 112 is for regulating the size of described deformation pattern and showing.
In the present embodiment, owing to working as, d is excessive, or S (x, y, z) distance X 0Y plane is excessively far away, may cause the picture of the input picture in curved mirror to diminish, so display module 112 is according to the ratio of the shared scope of picture and whole curved mirror, picture is carried out to suitable convergent-divergent, make the size of output image after convergent-divergent and curved mirror suitable.
Judge module 114 judges for the instruction according to user input whether described deformation pattern is the required result of user, and wherein said display module 112 is also for exporting described deformation pattern during for the required result of user at described deformation pattern.
In the present embodiment, described adjusting module 108 also continues to adjust the parameter of described image and the position of observation point when at described deformation pattern not being the required result of user.
Refer to Fig. 6, Figure 6 shows that the schematic diagram of the imaging on curved mirror.
In the present embodiment, curved mirror is quadric surface concave mirror type, and shown in index path, the picture that can obtain AB in mirror is a directing curve on curved surface, it is A ' B ' at the parallel projection that is parallel to an output rectangle region of X0Y plane, is output image.This figure shows that A ' B ' is greater than input figure AB, illustrates that this mirror has amplification, meanwhile, is greater than the length of C ' B ' by the length of finding CB, and the amplification that proves output map is not that equal proportion is amplified, and illustrates that this simulation mirror has the feature of concave mirror.Because this output map size is suitable with minute surface, do not need to adjust again its size, can directly export.Therefore the anamorphose device 10 based on water surface imaging characteristic in the present invention effectively reduces the complicacy of deformation operation, and has realized the simple reproduction of effect of the same race on different images.
Refer to Fig. 7, Figure 7 shows that the process flow diagram of the image distortion method based on water surface imaging characteristic in an embodiment of the present invention, comprising:
Step S1: initial module 102 creates primary simulation level crossing Mi(x, y, z).
In the present embodiment, in the present embodiment, primary simulation level crossing is shown in Fig. 3, and the center of primary simulation level crossing is true origin 0, is positioned in X0Y plane, and four limits are parallel to respectively the rectangle of X, Y-axis, and wherein, the wide and height of rectangle is respectively W and H.
In the present embodiment, the mathematic(al) representation of simulation level crossing is: M
i(x, y, z)=0, z (x, y)=0 that satisfies condition, x ∈ [W/2, W/2], y ∈ [H/2, H/2].
Step S2: 104 pairs of described level crossings of stretching module carry out stretcher strain, forms curved mirror Mf(x, y, z).
In the present embodiment, described stretching module 104, according to regulating the parameter described level crossing that stretches, forms described curved mirror, and the mathematic(al) representation of described curved mirror is M
f(x, y, z)=0, z (x, the y)=f (x, y) that satisfies condition, x ∈ [W/2, W/2], y ∈ [H/2, H/2], wherein, f (x, y) represents the z value size that point (x, y) is located.
In the present embodiment, f (x, y) requires everywhere continuous in field of definition, so the essence of stretching module 104 stretching level crossings is to change the depth value z that initial plane mirror is located at every point (x, y), makes it by a level crossing, convert curved mirror to.
Regulate on request level crossing, adjust exactly the concavo-convex of level crossing, allow it bring about the desired effect.According to optical principle, know, the picture that concave mirror becomes to amplify, the picture that convex mirror becomes to dwindle, therefore can allow it produce the effect that is necessarily similar to distorting mirror by regulating the parameters such as number, position and radius size of concave, convex face mirror, or the ripple of mimetic surface fluctuation.
In other embodiments of the present invention, concave, convex face mirror can be generalized to quadric surface mirror.
Step S3: acquisition module 106 obtains input picture.
The mathematic(al) representation of described input picture is: Iin (x, y), and the wide and height of described input picture is respectively Wi and Hi, and its functional value type is color RGB type.
Step S4: adjusting module 108 is adjusted the parameter of described input picture and the position of observation point.
In the present embodiment, the parameter of described input picture comprises the center Oi of image, and image is around the anglec of rotation θ of z axle, the distance d of image distance X0Y plane, observation point S(x, y, z) represent, wherein, default image parameter is set to: I (x, y, z)=I
in(
x,y); Z (x, the y)=d that satisfies condition, x ∈ [Wi/2, Wi/2], y ∈ [Hi/2, Hi/2], the center that the position of acquiescence observation point is described image (0,0, d).
Step S5: described input picture is out of shape by mirror image rule by described curved mirror, to obtain deformation pattern Iout (x, y), is surface chart picture shown in described curved mirror at the parallel projection of X0Y plane.
In the present embodiment, deformation module 110 is according to the process shown in Fig. 4 and Fig. 5, by output image Iout (x, y) any point Po (x in field of definition, y) correspond to 1 P (x on curved mirror, y, z), Po.x=P.x should satisfy condition, Po.y=P.y, then the index path of pointing out at P according to minute surface shown in Fig. 4, crosses some P (x, y.z) and is curved mirror M
fthe normal vector of (x, y, z)=0, then with
for reflection ray, find out incident ray, if incident ray and input picture have intersection point Ps(x ', y '), the functional value I input picture being located at a Ps (x ', y ')
in(x', y') is assigned to output image at an I that Po (x, y) locates
out(
x,y), if incident ray and input picture without intersection point, output image sets to 0 at the functional value of this point.The concrete mathematic(al) representation of output image is:
For the Po that can find corresponding point Ps on input picture, as shown in Figure 5, above formula is also just equivalent to following formula:
Iout(Po
x,Po
y)=Iin(Ps
x,Ps
y)
Po is represented with function g () to the corresponding relation of Ps, and described function comprises: observation point S (x, y, z), curved mirror M
fthe distance d of (x, y, z)=0, image distance X0Y plane, image parameter (picture centre position O
i, image is around the anglec of rotation θ of z axle) and output image I
out(
x,y) some Po(x, y in field of definition) six variablees, above formula can be write as:
Iout(Po
x,Po
y)=Iin(g(S,M
f,d,O
i,θ,Po))
Step S6: display module 112 regulates the size of described deformation pattern and shows.
In the present embodiment, owing to working as, d is excessive, or S (x, y, z) distance X 0Y plane is excessively far away, may cause the picture of the input picture in curved mirror to diminish, so display module 112 is according to the ratio of the shared scope of picture and whole curved mirror, picture is carried out to suitable convergent-divergent, make the size of output image after convergent-divergent and curved mirror suitable.
Step S7: judge module 114 judges according to the instruction of user's input whether described deformation pattern is the required result of user;
If described deformation pattern is the required result of user, at step S8: the described deformation pattern of display module 112 output.
If described deformation pattern is not the required result of user, return to step S4: adjusting module 108 continues to adjust the parameter of described input picture and the position of observation point.
The anamorphose device 10 based on water surface imaging features in embodiment of the present invention and method thereof are by creating primary simulation level crossing and level crossing being out of shape and obtaining curved mirror, then utilize curved mirror shaping rule to be out of shape and to obtain deformation pattern image, effectively reduce the complicacy of deformation operation, and realized the simple reproduction of effect of the same race on different images.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, all any modifications of doing within the spirit and principles in the present invention, be equal to and replace and improvement etc., within all should being included in protection scope of the present invention.
Claims (10)
1. the anamorphose device based on water surface imaging characteristic, is characterized in that, comprising:
Initial module, for creating primary simulation level crossing;
Stretching module, for described level crossing is carried out to stretcher strain, forms curved mirror;
Acquisition module, for obtaining input picture;
Adjusting module, for adjusting the parameter of described input picture and the position of observation point;
Deformation module, for described input picture being out of shape by mirror image rule by described curved mirror, to obtain deformation pattern, is surface chart picture shown in described curved mirror at the parallel projection of X0Y plane;
Display module, for regulating the size of described deformation pattern and showing;
Judge module, judges for the instruction according to user input whether described deformation pattern is the required result of user, and wherein said display module is also for exporting described deformation pattern during for the required result of user at described deformation pattern.
2. the anamorphose device based on water surface imaging characteristic according to claim 1, is characterized in that, described adjusting module also continues to adjust the parameter of described input picture and the position of observation point when at described deformation pattern not being the required result of user.
3. the anamorphose device based on water surface imaging characteristic according to claim 1, is characterized in that, the length of described simulation level crossing and wide W and the H of being respectively, and the mathematic(al) representation of described simulation level crossing is: M
i(x, y, z)=0, z (x, y)=0 that satisfies condition, x ∈ [W/2, W/2], y ∈ [H/2, H/2].
4. the anamorphose device based on water surface imaging characteristic according to claim 3, is characterized in that, the mathematic(al) representation of described curved mirror is M
f(x, y, z)=0, z (x, the y)=f (x, y) that satisfies condition, x ∈ [W/2, W/2], y ∈ [H/2, H/2], wherein, f (x, y) represents the z value size that point (x, y) is located.
5. the anamorphose device based on water surface imaging characteristic according to claim 1, it is characterized in that, the mathematic(al) representation of described input picture is: Iin (x, y), wide and the height of described input picture is respectively Wi and Hi, the parameter of described input picture comprises the center Oi of image, image is around the anglec of rotation θ of z axle, the distance d of image distance X0Y plane, observation point S(x, y, z) represent, wherein, default image parameter is set to: I (x, y, z)=Iin (x, y), z (x satisfies condition, y)=d, x ∈ [Wi/2, Wi/2], y ∈ [Hi/2, Hi/2], the center (0 that the position of acquiescence observation point is described image, 0, d).
6. the image distortion method based on water surface imaging characteristic, comprising:
Step S1: create primary simulation level crossing;
Step S2: described level crossing is carried out to stretcher strain, form curved mirror;
Step S3: obtain input picture;
Step S4: adjust the parameter of described input picture and the position of observation point;
Step S5: described input picture is out of shape by mirror image rule by described curved mirror, to obtain deformation pattern, is surface chart picture shown in described curved mirror at the parallel projection of X0Y plane;
Step S6: regulate the size of described deformation pattern and show;
Step S7: judge according to the instruction of user's input whether described deformation pattern is the required result of user;
If so, at step S8: export described deformation pattern.
7. the image distortion method based on water surface imaging characteristic according to claim 6, it is characterized in that, also comprise: if described deformation pattern is not the required result of user, return to step S4: continue to adjust the parameter of described input picture and the position of observation point.
8. the image distortion method based on water surface imaging characteristic according to claim 6, is characterized in that, the length of the described simulation level crossing in step S1 and wide W and the H of being respectively, described simulation level crossing mathematic(al) representation be: M
i(x, y, z)=0, z (x, y)=0 that satisfies condition, x ∈ [W/2, W/2], y ∈ [H/2, H/2].
9. the image distortion method based on water surface imaging characteristic according to claim 6, is characterized in that, in step S2, the mathematic(al) representation of curved mirror is M
f(x, y, z)=0, z (x, the y)=f (x, y) that satisfies condition, x ∈ [W/2, W/2], y ∈ [H/2, H/2], wherein, f (x, y) represents the z value size that point (x, y) is located.
10. the image distortion method based on water surface imaging characteristic according to claim 6, it is characterized in that, the mathematic(al) representation of the described input picture in step S4 is: Iin (x, y), wide and the height of described input picture is respectively Wi and Hi, described input picture Iin(x, y) parameter comprises the center Oi of image, image is around the anglec of rotation θ of z axle, the distance d of image distance X0Y plane, observation point S(x, y, z) represent, wherein, default image parameter is set to: I (x, y, z)=Iin (x, y), z (x satisfies condition, y)=d, x ∈ [Wi/2, Wi/2], y ∈ [Hi/2, Hi/2], the center (0 that the position of acquiescence observation point is described image, 0, d).
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