WO2022267595A1

WO2022267595A1 - Projection correction method and apparatus, device, and storage medium

Info

Publication number: WO2022267595A1
Application number: PCT/CN2022/083560
Authority: WO
Inventors: 冉宏威; 王鑫
Original assignee: 成都极米科技股份有限公司
Priority date: 2021-06-25
Filing date: 2022-03-29
Publication date: 2022-12-29
Also published as: CN115529444A

Abstract

The present application relates to the technical field of projection, and provides a projection correction method and apparatus, a device, and a storage medium. The method comprises: in a projection correction page after keystone correction, obtaining a first adjustment operation for a first vertex of a projection screen; in response to the first adjustment operation, obtaining vertex coordinates of a light engine image corresponding to the projection screen; determining, according to the vertex coordinates of the light engine image, an outer frame of a simulated imaging element corresponding to the light engine image, and coordinates of the outer frame of the simulated imaging element, the outer frame of the simulated imaging element being a rectangular frame; on the basis of a first distance, the coordinates of the outer frame of the simulated imaging element, and a screen correction function associated with a preset display scale, determining a new light engine image for correcting the projection screen; and performing projection according to the new light engine image to obtain a corrected projection screen. In the present application, on one hand, the screen subjected to keystone correction can be conveniently corrected; on the other hand, by introducing the screen correction function associated with the preset display scale, the accuracy of projection screen correction is improved.

Description

Projection correction method, device, equipment and storage medium

technical field

The present application relates to the field of projection technology, and in particular, to a projection correction method, device, electronic equipment, and storage medium.

Background technique

With the development of social economy and the advancement of electronic information technology, the intelligent projection industry has ushered in a great development, and the problem that comes with it is the correction of the projection screen. How to quickly correct the projection screen has become an important issue in the projection industry.

At present, the commonly used keystone correction methods include automatic keystone correction (Auto Keystone, AK) and manual "4-point correction". Among them, when the user uses AK to correct the projected picture and moves the projector during normal use of the projector, the projected picture on the wall will change from a rectangular picture to a right-angled trapezoidal picture. In the prior art, the user can only use "4 Manual point-by-point correction or use the "AK" function to calibrate again. The adjustment efficiency of "4-point correction" is slow, and the AK correction effect is not good. Or, when the user manually adjusts the picture using "4-point correction", there is currently no correction solution that can quickly correct the original image.

Contents of the invention

The purpose of this application is to provide a projection correction method, device, electronic equipment and storage medium for the deficiencies in the above-mentioned prior art, so as to solve the problem that users in the prior art can only use "4-point correction" to perform manual point-by-point correction or Use the "AK" function to calibrate again, the adjustment efficiency of "4-point calibration" is slow, and the AK calibration effect is not good. Or, when the user manually adjusts the image using "4-point correction", there is currently no correction solution that can quickly correct the original image.

In order to achieve the above purpose, the technical solution adopted in the embodiment of the present application is as follows:

In the first aspect, the embodiment of the present application provides a projection correction method, including:

On the projection correction page after keystone correction, a first adjustment operation for the first vertex of the projected picture is obtained, the first adjustment operation is used to indicate: move the first vertex along a first direction by a first distance;

Responding to the first adjustment operation, acquiring the vertex coordinates of the optomechanical image corresponding to the projection screen;

According to the vertex coordinates of the optomechanical image, determine the outer frame of the analog imaging element corresponding to the optomechanical image and the outer frame coordinates of the outer frame of the analog imaging element; wherein, the outer frame of the analog imaging element is a rectangular frame;

Determine a new optomechanical image for correcting the projected image based on the first distance, the frame coordinates of the frame of the simulated imaging element, and a frame correction function associated with a preset display scale;

The projection is performed according to the image of the new optical machine, and the corrected projection picture is obtained.

In the second aspect, the embodiment of the present application also provides a projection correction device, the device includes:

An acquisition module, configured to acquire a first adjustment operation for the first vertex of the projected image on the projection correction page after keystone correction, and the first adjustment operation is used to indicate: align the first vertex along the first direction move the first distance;

A response module, configured to respond to the first adjustment operation and obtain the vertex coordinates of the optomechanical image corresponding to the projection screen;

A determining module, configured to determine the outer frame of the analog imaging element corresponding to the optomechanical image and the outer frame coordinates of the outer frame of the analog imaging element according to the vertex coordinates of the optomechanical image; wherein, the outer frame of the analog imaging element The frame is a rectangular frame; based on the first distance, the frame coordinates of the frame of the simulated imaging element and a frame correction function associated with a preset display ratio, determine a new optical-mechanical image for correcting the projected frame;

The projection module is configured to perform projection according to the new optical machine image to obtain a corrected projection picture.

In a third aspect, an embodiment of the present application provides an electronic device, including: a processor, a storage medium, and a bus. The storage medium stores machine-readable instructions executable by the processor. When the electronic device is running, the processor and the storage medium Through bus communication, the processor executes machine-readable instructions to execute the steps of the projection correction method as provided in the first aspect.

In a fourth aspect, an embodiment of the present application provides a storage medium, on which a computer program is stored, and when the computer program is executed by a processor, the steps of the projection correction method provided in the first aspect are executed.

The beneficial effect of this application is:

An embodiment of the present application provides a projection correction method, device, device, and storage medium. The method includes: acquiring the first adjustment operation for the first vertex of the projection screen on the projection correction page after trapezoidal correction, and the first adjustment operation It is used to indicate: move the first vertex along the first direction by the first distance; respond to the first adjustment operation, obtain the vertex coordinates of the optical-mechanical image corresponding to the projection screen; determine the simulation corresponding to the optical-mechanical image according to the vertex coordinates of the optical-mechanical image The outer frame of the imaging component and the outer frame coordinates of the simulated imaging component frame; wherein, the simulated imaging component outer frame is a rectangular frame; based on the first distance, the frame coordinates of the simulated imaging component outer frame are associated with the preset display ratio. The function is used to determine the new optical machine image used to correct the projected picture; perform projection according to the new light machine image to obtain the corrected projected picture. In this solution, by obtaining the vertex coordinates of the optical-mechanical image corresponding to the projection screen after trapezoidal correction, and based on the vertex coordinates of the optical-mechanical image, the outer frame of the analog imaging component corresponding to the optical-mechanical image and the analog imaging The outer frame coordinates of the outer frame of the component can be calculated according to the first distance that the first vertex in the projected picture moves along the first direction, the outer frame coordinates of the simulated imaging component outer frame, and the picture correction function. In order to project images according to the obtained Xinguangji image, on the one hand, the image after trapezoid correction can be corrected conveniently, which can effectively improve the correction efficiency of the projected picture; on the other hand, by introducing and preset The image correction function related to the display ratio can improve the accuracy of projection image correction and improve the user's viewing experience.

In addition, this application proposes to obtain the difference function of the abscissa of the second effective projection vertex calculated by the automatic trapezoidal correction algorithm and the quick correction algorithm, and obtain the compensated second effective projection based on the difference function of the abscissa of the second effective projection vertex The coordinates of the vertex, then, use the second effective projected vertex coordinates after compensation to carry out shortcut keystone correction to obtain the corrected projection picture, so that the mutation of the corrected projected picture obtained is reduced, and there are only B, The lateral mutation of point C, and the mutation of points A and D are generally within a dozen pixels (4K resolution), which effectively solves the problem of sudden changes in the corrected projection screen.

Secondly, in this application, it is also proposed to generate an animated image associated with the optical-mechanical image and the new optical-mechanical image according to the vertex coordinates of the optical-mechanical image corresponding to the acquired projection image, the coordinates of the effective projection area, and the preset animation algorithm, so as to realize In addition to the use of fitting and animation processing, animation is used to make a gradient effect between switching the optical-mechanical image to the calculated new optical-mechanical image, so that the frames of images in the animation image Projection is carried out at a certain interval, so that when the optical machine image is switched to the new optical machine image, the user can hardly feel the sudden change of the corrected projected picture, which effectively reduces the sudden change of the projected picture seen by the user, thus improving the user experience. viewing experience.

Finally, the application also proposes to determine the coordinates of the second effective projection vertex based on the target correction coefficient, the calculated coordinates of the second effective projection vertex abscissa and the difference value of the second effective projection vertex abscissa, so that the target correction coefficient can be used to Correcting the coordinates of the vertices of the second effective projection can effectively solve the problem of sudden changes in the projection screen after the shortcut keystone correction is compatible with AK correction.

Description of drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the accompanying drawings used in the embodiments. It should be understood that the following drawings only show some embodiments of the present application, so It should be regarded as a limitation on the scope, and those skilled in the art can also obtain other related drawings based on these drawings without creative work.

FIG. 1 is a first schematic flow diagram of a projection correction method provided by an embodiment of the present application;

FIG. 2 is a schematic diagram of a projection correction page provided by an embodiment of the present application;

Fig. 3 is a schematic diagram of the image change process of the glazing machine of the imaging element when using the shortcut keystone correction function to adjust the projected picture provided by the embodiment of the present application;

Fig. 4 is a schematic diagram of the outer frame of the analog imaging element corresponding to the optomechanical image provided by the embodiment of the present application;

FIG. 5 is a schematic diagram of a functional relationship provided by the embodiment of the present application;

FIG. 6 is a schematic diagram of a projection diagram provided by an embodiment of the present application;

FIG. 7 is a schematic diagram of another functional relationship provided by the embodiment of the present application;

FIG. 8 is a schematic diagram of another functional relationship provided by the embodiment of the present application;

FIG. 9 is a schematic diagram of another projection relationship provided by the embodiment of the present application;

Fig. 10 is a schematic diagram of the vertex coordinates of the optomechanical image provided by the embodiment of the present application;

FIG. 11 is a schematic diagram of correction of a projection screen provided by an embodiment of the present application;

12 is a schematic diagram of the first fitting function of the ordinate of the first projected vertex and the abscissa of the second effective projected vertex under the fully automatic keystone correction algorithm provided by the embodiment of the present application;

13 is a schematic diagram of the second fitting function of the ordinate of the first projected vertex and the abscissa of the second effective projected vertex under the shortcut correction algorithm provided by the embodiment of the present application;

FIG. 14 is a schematic diagram of changes in an opto-mechanical image during the correction process of a projected picture provided by an embodiment of the present application.

detailed description

On the one hand, a brief description of the relevant background technology of this application:

When the user uses AK to calibrate the picture and moves the projector during normal use, the projected picture on the wall changes from a rectangular picture to a right-angled trapezoidal picture. Point correction or use the "AK" function to re-correct the "rectangular trapezoidal picture".

However, first, when the user manually adjusts the picture using "4-point correction", there is currently no correction scheme that can achieve fast correction on the original image; second, when the user uses "AK" to correct, the resulting projected picture may It is still not a standard rectangle, resulting in poor viewing effect for users. This solution can perform fast "quick trapezoidal correction" on the original AK-corrected picture, so as to realize the fine-tuning of the non-standard rectangular picture into a rectangular picture, and ensure that the "fine-tuned rectangular picture" has no sudden change, and the whole adjustment process is smooth. , to achieve the purpose of improving the user's experience and viewing effect.

On the other hand, the projection principle of the projection light machine involved in the present application is briefly explained: the projection light machine may have a DMD (Digital Micromirror Device), and the DMD is an array composed of a plurality of high-speed digital light reflection switches. It is composed of many small aluminum reflective mirrors. The number of lenses is determined by the display resolution. One small lens corresponds to one pixel and is used to image the projection screen. After the light source is emitted, it will be projected on the DMD and displayed on the projection wall through imaging. When correcting the projection screen on the projection wall, the pixel value of each pixel on the DMD can be adjusted to adjust the projection on the wall. the shape of the screen.

Next, the solution of the present application will be described in detail through multiple specific embodiments.

FIG. 1 is a first schematic flowchart of a projection correction method provided in an embodiment of the present application; FIG. 2 is a schematic diagram of a projection correction page provided in an embodiment of the present application. The subject of execution of the method may be a controller, a processor and other devices in the projection light machine, or may be a computer, a server and other devices independent of the projection light machine. As shown in Figure 1, the method may include:

S101. On the projection correction page after keystone correction, acquire a first adjustment operation for a first vertex of a projected image, where the first adjustment operation is used to indicate: move the first vertex along a first direction by a first distance.

Optionally, the "projection correction page" refers to a page used to correct the projection screen. As shown in FIG. 2, the projection correction page may include a shortcut correction control and at least one adjustment control, wherein the background of the projection correction page Can be any background.

Optionally, the user may input a first adjustment operation for the first vertex of the above-mentioned "projection picture" on the projection correction page through the adjustment control in the "projection correction page", wherein the first vertex may refer to the designated point.

Exemplarily, continue to refer to FIG. 2 , wherein the adjustment controls may include a first adjustment control and a second adjustment control, the first adjustment control may be used to adjust the vertical downward movement of points in the "projection screen", and the second adjustment control may be used to Adjust the point in the "Projected Screen" to move vertically upwards. The user can control the first adjustment control through the button in the remote control of the projection light machine, so as to move the first vertex in the "projected picture" by the first distance along the first direction, taking the projected picture shown in Figure 2 as Take a right-angled trapezoid as an example, assuming that the first vertex is point a1, the first adjustment control can be controlled by a button, and the first adjustment operation can be input to move point a1 to point a2 along the vertical direction, where the first distance is available in pixels The number of points represents, for example, moving point a1 by n pixels along the vertical direction ad to reach point a2, that is, the first distance is a1a2. Pressing the first adjusting button once corresponds to adjusting a fixed step value s, which can also be understood as the above n pixel points.

S102. In response to the first adjustment operation, acquire the vertex coordinates of the optomechanical image corresponding to the projection screen. Wherein, the optical machine image can be understood as the DMD image input into the DMD of the projection optical machine for projecting the above-mentioned projection picture.

Optionally, in response to the first adjustment operation on the first vertex of the projected picture, and acquire the vertex coordinates of the corresponding optomechanical image of the projected picture after the first adjustment operation.

S103. According to the vertex coordinates of the optomechanical image, determine the frame of the simulated imaging component corresponding to the optomechanical image and the frame coordinates of the frame of the simulated imaging component; wherein, the frame of the simulated imaging component is a rectangular frame with a preset display ratio. For example, if the preset display ratio of the projection screen is 16:9, then the frame of the analog imaging component here is a rectangular frame of 16:9. In the embodiment of the present application, the simulated imaging component frame may be understood as a virtual DMD frame, and the imaging component frame may be understood as a real DMD frame.

Referring to FIG. 4 , the optomechanical image and the area corresponding to the frame of the simulated imaging element corresponding to the optomechanical image can be clearly obtained.

Optionally, FIG. 3 is a schematic diagram of the image change process of the polisher of the imaging element when using the shortcut keystone correction function to adjust the projection screen provided by the embodiment of the present application. As shown in FIG. 3, when the user uses the shortcut keystone correction function to adjust the projection screen , the ordinate Ay of the first projected point (such as point A in Fig. 4) that has a mapping relationship with the first vertex of the projection screen (such as point a1 in Fig. 2) on the optomechanical image always moves on the left boundary of the imaging element outer frame , the abscissa Bx of the second projected point (for example, point B in FIG. 4 ) always moves on the upper boundary of the outer frame of the imaging element.

Among them, the specific way to adjust the projection screen through the shortcut keystone correction function is as follows:

The first step is to obtain the adjustment operation for the preset vertex in the projection screen, and determine the cumulative step value mstep corresponding to the adjustment operation;

Optionally, during the actual use of the projector, the user can enter the shortcut correction mode by operating the shortcut correction control on any page (such as a video playback page, a music playback page, etc.), so as to correct the currently displayed projection screen Make corrections.

The adjustment operation described above may be a user's press operation on the first adjustment control or the second adjustment control input in the remote controller of the projector. Take the left side projection of the projector as an example, as shown in the right figure in Figure 11, the preset vertex is point a, and the initial projection screen is abcd, the user can press the first adjustment control to move the a point down to a1 , each time the first adjustment control is pressed, the corresponding cumulative step value mstep increases by a fixed step value s, and the initial mstep is 0. On the contrary, each time the second adjustment control is pressed, the corresponding accumulated step value mstep is reduced by a fixed step value s.

Alternatively, when the projector is projecting on the right side, the preset vertex changes accordingly, from point a to point b, which is not specifically limited in the present application.

It can be understood that when the projection light machine is placed horizontally, when the projected picture is projected onto the wall at any horizontal angle with the DMD, the light diagram of the projected picture is always a right-angled trapezoid. When the projection angle remains unchanged, the light on the wall The map is also always unchanged, and the projected picture always moves within the range of the light map.

The second step is to update the optomechanical image corresponding to the above-mentioned projected image according to the cumulative step value mstep corresponding to the above-mentioned adjustment operation (that is, the vertical coordinate a_y of the preset vertex) and the image correction function matching the preset display ratio, and obtain the target image .

Among them, an adjustment operation is input for each pair of preset vertices to move the preset vertices downward. The change process of the corrected projection screen can be seen in the left figure of Figure 11. It can be seen that after repeated adjustments, the projection The screen is transformed step by step from a trapezoid to a rectangle with a preset display ratio. By adopting such a method, quick calibration of the projected picture can be realized, a rectangular picture with a preset display ratio can be quickly planned, and user experience can be improved.

In a specific implementation, the specific implementation of the second step above is as follows:

When the projection device is placed horizontally and projected on the wall at any horizontal angle with the device DMD, the light diagram is always a right-angled trapezoid (because the light source of the projection device is on the same level as the bottom edge of the DMD), when the projection angle is different When changing, the light map on the wall also does not change, and the picture is always moving within the range of the light map. By adjusting the position of the highest point of the trapezoid downwards, the projected image becomes a rectangle. At this time, point d of the image on the DMD is moved down by Pn pixels. Assuming that the aspect ratio of the DMD is 16:9, then the long side of the DMD can be set to 16 and the short side to 9,

Still taking the aspect ratio of the DMD as 16:9 as an example, FIG. 6 is a schematic diagram of a projection diagram provided by an embodiment of the present application. Description of the projection diagram: O is the light source, plane P1 is the DMD, P2 is the imaginary facing the wall, and P3 is the real wall with a certain inclination to the projection light machine. d3a'b'h2 is a light graph, when the angle of the projection light machine remains unchanged, the shape of the light graph does not change, and the initial projection image can be considered to overlap with the light image d3a'b'h2, when the preset point in the initial projection image When d3 is adjusted to a rectangular image along d3h2, the projected image fa'b'h2 on the wall is just a rectangular image at this time. At this time, the original image dabc of the DMD is correspondingly changed to abce, that is, through the acquired moving distance of d3f, That is, the above-mentioned target distance can be calculated correspondingly to obtain the number of moving pixels of de, that is, the above-mentioned moving parameters of the target point on the DMD can be obtained. Assuming that the target point d of the original image on the DMD moves down by Pn pixels, the functional relationship between the number of moving pixels of de and the distance of de can be

Calculate the target distance x, where x refers to the distance of de, P _n refers to the number of moving pixels of de, M refers to the physical resolution of the DMD in the projection light machine, and D refers to the display ratio of the projection screen , in this embodiment, take the physical resolution of the DMD as 1080, and the projection screen display ratio as 16:9 as an example, then, the corresponding can be according to the formula

It should be noted that this solution is applicable when the physical resolution of the DMD in the projection light machine and the display ratio of the projection screen are other values.

1. Proof: L _ec : Lab ＝ L _a′b _′ : L _h2d3 = 9-x: 9

Since △d3h2O, △d′c′O, △dcO are mutually similar triangles, it is easy to prove that L _e′h2 ＝L _a′b _′ 、 L _cd ＝Lab:

L _ec : Lab = L _a'b _' : L _h2d3 = 9-x: 9

2. Calculate L _fa' : L _a'd'

FIG. 7 is a schematic diagram of another functional relationship provided by the embodiment of the present application; FIG. 8 is a schematic diagram of another functional relationship provided by the embodiment of the present application.

Assume that the projection ratio (projection distance: projection screen width) is a constant r, and in this embodiment, r may be 16:9. Then ct=8, to=16r, in ⊿cto by the Pythagorean theorem

Let L _co be m.

In ⊿cto, according to the projection relationship, it is easy to get that ∠a′d′f and ∠bco are complementary, so we can get:

According to the projection relationship, it is easy to get that △fd'e' is similar to Δoce, and according to the similarity relationship,

in Δfa'd'

L _a'd' = 16n,

From the law of cosines

So, you can get:

bring in

got later

3. Proof: L _fa′ : L _d3h2 = constant K

Let L _fa' : L _a'd' = R because

so

Put L _fa' and L _a'd' into the expression:

In summary, L _fa' of the light map projected on the wall: L _d3h2 = K, when the throw ratio of the projection light machine is fixed, K is only related to the number of pixels moved on the DMD.

4. Find the ratio of the right-angled trapezoidal light map projected on the wall

When the user adjusts the initial projected picture (rectangular trapezoid) to the projected picture (rectangular image), the unique x on the DMD can be obtained, and the expression with K can be used to calculate the aspect ratio L _fa′ : L _d3h2 of the light map, and then Add L _a'b' : L _d3h2 = (9-x): 9, so the ratio of the two parallel sides of the right-angled trapezoid to the base (L _d3h2 , L _a'b' , L _h2b' ) can be uniquely determined, and That is, the light map ratio mentioned above. Among them, L _d3h2 corresponds to 1, L _a'b' corresponds to K1, L _h2b' corresponds to K, and the light map ratio can also refer to the proportional relationship between K, K1 and 1, where,

5. Plan the target rectangle matching the preset display ratio (eg 16:9) in the light map corresponding to the projection screen

For the above-mentioned predetermined display ratio matching rectangular image determined in the light map corresponding to the projected picture, in a feasible manner, the first intersection point between the light map and the target curve can be determined first, that is, it can be drawn in the light map A target curve, the slope of the target curve can be obtained according to the preset display ratio mentioned above. Taking the preset display ratio of 16:9 as an example, the slope of the target curve can be 9/16.

It should be noted that, for a computer, the above-mentioned operation of making the target curve can be realized through a program, and the parameters in the program can include light map data, slope of the target curve and other data.

As shown in Figure 5, the determined light diagram can be a right-angled trapezoid d3-a'-b'-h2 in the figure, and the target curve can be h2d5, wherein the specified non-parallel sides of the right-angled trapezoid included on the target curve That is to say h2b', the specified parallel side also refers to d3h2, and the second intersection point also refers to h2, through the second intersection point and the preset slope, the specific shape of the target curve can be determined, then, the light diagram and the target can be further obtained The first point of intersection of the curves may be referred to as point g.

Further, according to the first intersection point and the second intersection point, a rectangular image matching a preset display ratio is determined, and vertices of the rectangular image include the first intersection point and the second intersection point.

Optionally, based on the first intersection point g determined above, it is possible to take g as the starting point and draw perpendicular lines to the sides d3h2 and h2b' of the right-angled trapezoid d3-a'-b'-h2, respectively, as shown in Figure 5 Based on the obtained intersection points f and m, as well as the above-mentioned first intersection point and second intersection point, the rectangular image f-g-m-h2 matching the preset display ratio can be determined in the light diagram of the projection screen.

Optionally, based on the ratio data of the obtained light map, the curve function of the above-mentioned target curve, and the function corresponding to the specified non-parallel side d3a' of the right-angled trapezoid in Figure 5, the coordinates of the above-mentioned first intersection point g can be calculated .

Based on the coordinate system established in Figure 5, the curve function equation of the target curve h2d5 can be obtained:

Wherein, the slope of the target curve is determined according to a preset display ratio of 16:9. And the function equation corresponding to the specified non-parallel side d3a' is:

Simultaneous solution can get the first intersection point

6. Calculate ∠B

As shown in Figure 9, the light source is O, the first light source curve can refer to Ob', the second light source curve can refer to Ob"', and the included angle can refer to ∠B.

The specific calculation process of ∠B can be as follows:

In the triangle Δb'Ho, L _Hb' = 8, L _Ho = 16r,

Available

Available in Δd3h2o

Available in Δd'c'o

Available in Δb'h2o

In Δb'b"'o, L _b'o = L _c'o ; L _b'b"' = K-X_ideal, we can get

Available in Δb'b"'o

∠B＝cos ^-1 (cos∠B).

Available in Δb'Ho

7, calculate the four point coordinate point d " of 4 point coordinates a " b " cd " (being the effective projection area of new light machine image in the projection light machine) among Fig. 9: d "_x=0; d "_y=Py-Py *Y_ideal; point c: c_x=0; c_y=0;

point a'': a''_y=0;

Point b": b"_y = Py; b"_x = a"_x.

in,

K1=(9-x)/9

Among them, Px, Py are the abscissa and ordinate of point b respectively, since the coordinates of the original image dabc in the projection light machine are known, so Px, Py are also known. Among them, Px, Py are the abscissa and ordinate of point b respectively, since the coordinates of the original image dabc in the projection light machine are known, so Px, Py are also known. Wherein, Px and Py are related to the physical resolution of the DMD in the projection light engine, specifically, Px is the number of horizontal pixels of the physical resolution of the DMD, and Py is the number of vertical pixels of the physical resolution of the DMD. For example, DMD physical resolution is (1920*1080), then Px=1920, Py=1080.

Based on the above description, the above-mentioned picture correction function matching the preset display ratio can refer to the above-mentioned formula for calculating the coordinates a″b″cd” of the four points. Specifically, the specific implementation of the second step above is:

The accumulative step value mstep corresponding to the above-mentioned adjustment operation is used as the number of pixels to move down on the image d point on the DMD, that is, the above-mentioned Pn=accumulative step value mstep, correspondingly, when the preset display ratio is 16:9, DMD physical resolution is 1080, then, x=(cumulative step value mstep/1080)*9, in this case, the known x can be brought into the calculation formula of the above-mentioned 4-point coordinates a″b″cd″ , calculate the four-point coordinates of the effective projection area of the new image to be input into the optical machine, and then obtain the target image based on the four-point coordinates.

Continue to refer to the above-mentioned Fig. 4 for the schematic diagram of the analog imaging element frame corresponding to the optomechanical image provided by the embodiment of the present application; however, as shown in Fig. 4, when the user performs AK keystone correction and manual After 4-point correction or screen zooming, the optical-mechanical image corresponding to the projected screen obtained is located in the center of the "imaging element frame", rather than close to the boundary of the imaging element frame, so there are AK correction functions, manual 4-point correction, and image zooming Compatible with the shortcut keystone correction, in order to continue to be compatible with the shortcut keystone correction function after AK, manual 4-point correction or image scaling, to improve the speed and accuracy of projection screen correction.

The embodiment of the present application can obtain the vertex coordinates of the opto-mechanical image at the current moment (that is, the opto-mechanical image corresponding to the AK, manual 4-point correction, or the screen zoomed projection screen), and based on the vertex coordinates of the opto-mechanical image, determine the corresponding The frame of the simulated imaging component and the coordinates of the frame of the frame of the simulated imaging component, so that when the user uses the shortcut keystone correction function to adjust the projection screen, the optomechanical image can move on the boundary of the frame of the simulated imaging component.

S104. Based on the first distance, the frame correction function associated with the frame coordinates of the frame of the simulated imaging element and the preset display scale, determine a new optomechanical image for correcting the projected frame.

Wherein, the image correction function associated with the preset display ratio refers to the calculation formula for calculating the four-point coordinates of the effective projection area of the new optical machine image in the projection optical machine. The abscissa and ordinate of the point corresponding to point b in Fig. 9 replace Px and Py in the above formula. Therefore, after obtaining the outer frame coordinates of the outer frame of the simulated imaging element, the first one in the projected picture obtained above can be obtained. The "first distance" that the vertex moves along the first direction and the picture correction function determine the new optical-mechanical image used to correct the projected picture, so as to realize the fast trapezoidal correction of the projected picture, and also solve the trapezoidal correction and fast trapezoidal Correct compatibility issues.

S105. Perform projection according to the image of the Xinguang Machine to obtain a corrected projection image.

In some embodiments, the new optical machine image can be input to the projection optical machine, and the image is projected according to the size of the new optical machine image to obtain the "corrected projection picture". In this way, on the one hand, the keystone corrected picture can be conveniently corrected , which can effectively improve the efficiency of projected picture correction; on the other hand, by introducing a picture correction function associated with a preset display ratio, the accuracy of projected picture correction can be improved, and the user's viewing experience can be improved.

Referring to Figure 11, assuming that the projected picture after keystone correction is the picture corresponding to abcd, when the projector is projected on the left side, the first vertex is point a, inputting the first adjustment operation can move point a downward and adjust it to a1, execute The above step S102 to step S105 can correct the projected picture from abcd to A1B1C1d. Correspondingly, the user can continue to input the second adjustment operation, the third adjustment operation, the fourth adjustment operation, etc., and continuously move the point a in the projection screen downwards, and the above steps can be repeated for each adjustment operation input From S102 to step S105, the change process of the projected picture after correction can be referred to the left diagram of Figure 11 until the projected picture is corrected to a standard rectangle (such as a 16:9 standard rectangle) that matches the preset display ratio. It can be compatible with the convenient keystone correction scheme after performing keystone correction (AK or manual keystone correction) on the projected picture, and quickly adjust the keystone corrected picture to a standard rectangle that matches the preset display ratio.

It can be understood that this solution is also applicable to the projected picture after optical zooming and zooming. Specifically, the first adjustment operation for the first vertex of the projected picture after optical zooming and zooming can still be obtained. According to the The first adjustment operation executes the above steps S102 to S105 to realize convenient correction of the screen.

To sum up, the embodiment of the present application provides a method for projection correction, the method includes: obtaining a first adjustment operation for the first vertex of the projection screen on the projection correction page after trapezoidal correction, the first adjustment operation is used to Instruction: move the first vertex along the first direction by a first distance; respond to the first adjustment operation, obtain the vertex coordinates of the projection screen corresponding to the opto-mechanical image; determine the analog imaging element corresponding to the opto-mechanical image according to the vertex coordinates of the opto-mechanical image Outer frame, and the outer frame coordinates of the outer frame of the simulated imaging element; wherein, the outer frame of the simulated imaging element is a rectangular frame; based on the first distance, the outer frame coordinates of the outer frame of the simulated imaging element and the picture correction function, determine the projection image used for correction The Xinguangji image; project according to the Xinguangji image to obtain the corrected projection screen. In this solution, by obtaining the vertex coordinates of the optical-mechanical image corresponding to the projection screen after trapezoidal correction, and based on the vertex coordinates of the optical-mechanical image, the outer frame of the analog imaging component corresponding to the optical-mechanical image and the analog imaging The outer frame coordinates of the outer frame of the component can be calculated according to the first distance that the first vertex in the projected picture moves along the first direction, the outer frame coordinates of the simulated imaging component outer frame, and the picture correction function. In order to project images according to the obtained Xinguangji image, on the one hand, the image after trapezoid correction can be corrected conveniently, which can effectively improve the correction efficiency of the projected picture; on the other hand, by introducing and preset The image correction function related to the display ratio can improve the accuracy of projection image correction and improve the user's viewing experience.

The following embodiments will be used to explain in detail how to determine the outer frame of the analog imaging element corresponding to the optomechanical image and the outer frame coordinates of the outer frame of the analog imaging element according to the vertex coordinates of the optomechanical image.

Optionally, in the above step S103, according to the vertex coordinates of the optomechanical image, determining the outer frame of the analog imaging component corresponding to the optomechanical image and the outer frame coordinates of the outer frame of the analog imaging component may include:

S1001. According to the vertex coordinates of the optomechanical image, calculate the side length parameter of the frame of the analog imaging component.

Wherein, the side length parameters of the simulated imaging component frame include: a height parameter of the simulated imaging component frame, and a width parameter of the simulated imaging component frame.

In this embodiment, the side length parameter of the frame of the simulated imaging device can be calculated according to the vertex coordinates of the optomechanical image.

Optionally, in the above step S1001, according to the vertex coordinates of the optomechanical image, calculating the side length parameter of the frame of the analog imaging component may include:

S1101. Determine a circumscribing rectangle corresponding to the optomechanical image according to the vertex coordinates of the optomechanical image, where the optomechanical image is a quadrilateral and the circumscribing rectangle is a rectangle matching the quadrilateral.

After the user performs trapezoidal correction on the initial projected picture, the resulting optical-mechanical image corresponding to the projected picture is not a standard right-angled trapezoid.

Optionally, the following method can be used to process the optomechanical image to obtain a standard rectangular trapezoidal optomechanical image and simulate the outer frame of the imaging element.

First, the circumscribed rectangle corresponding to the optomechanical image can be determined according to the vertex coordinates of the optomechanical image. For example, Fig. 10 is a schematic diagram of the vertex coordinates of the optomechanical image provided by the embodiment of the present application; (A_x_raw, A_y_raw), B(B_x_raw, B_y_raw), C(C_x_raw, C_y_raw) and D(D_x_raw, D_y_raw).

According to the vertex coordinates of the optical-mechanical image, determine the maximum abscissa, the minimum abscissa, the maximum ordinate and the minimum abscissa in the vertex of the optical-mechanical image. The specific judgment process is as follows:

short x_min=A_x_raw<D_x_raw? A_x_raw:D_x_raw;

short x_max=B_x_raw>C_x_raw? B_x_raw: C_x_raw;

short y_min=A_y_raw<D_y_raw? A_y_raw: D_y_raw;

short y_max=B_y_raw>C_y_raw? B_y_raw: C_y_raw;

At this point, the coordinates of the circumscribed rectangle corresponding to the optomechanical image can be determined according to the maximum abscissa, minimum abscissa, maximum ordinate, and minimum abscissa of the vertices of the optomechanical image.

S1102. Determine the height parameter of the circumscribed rectangle as the height parameter of the frame of the simulated imaging component.

Optionally, the height of the circumscribing rectangle is used as a height parameter of the "frame of the simulated imaging device", that is, px_y=short(y_max-y_min).

S1103. According to the height parameter of the frame of the simulated imaging component and the preset display ratio, calculate the width parameter of the frame of the simulated imaging component.

Generally, when the projected picture is a rectangular picture of 16:9, the user has a better viewing angle effect when viewing the projected picture. Therefore, in this embodiment, the preset display ratio is 16:9 as an example, that is, the ratio between the height parameter and the width parameter in the frame of the simulated imaging device complies with the standard display ratio.

That is, after the height parameter of the frame of the simulated imaging element is determined, the height parameter and the preset display ratio of the frame of the simulated imaging element can be simulated, and the width parameter of the frame of the simulated imaging element can be calculated, that is, px_x=short( (y_max-y_min)*16/9).

S1002. Calculate the vertex coordinates of the frame of the simulated imaging device according to the side length parameter of the frame of the simulated imaging device.

On the basis of the above-mentioned embodiments, after obtaining the height parameter px_y and the width parameter px_x of the outer frame of the simulated imaging element, the side length of the outer frame of the simulated imaging element can be obtained according to the above-mentioned "coordinates of the circumscribed rectangle corresponding to the optical-mechanical image" parameters, and further calculate the vertex coordinates of the frame of the simulated imaging component.

In this embodiment, in order to determine the uniqueness of the calculated vertex coordinates of the simulated imaging component frame, the extension direction of the simulated imaging component frame can also be determined according to the vertex coordinates of the optomechanical image.

How to determine the extension direction of the outer frame of the analog imaging element according to the coordinates of the vertices of the optomechanical image will be specifically explained through the following embodiments.

Optionally, the optomechanical image is a quadrilateral. Before the above step S103: according to the vertex coordinates of the optomechanical image, the outer frame of the simulated imaging component corresponding to the optomechanical image and the outer frame coordinates of the simulated imaging component are determined. Methods may also include:

S1301. Obtain the ordinates of the two vertices of the specified side of the quadrilateral.

Wherein, taking FIG. 10 as an example, the two vertices of the designated side of the quadrilateral respectively indicate point A and point B shown in FIG. 10 , that is, A(A_x_raw, A_y_raw), B(B_x_raw, B_y_raw). The designated side can be understood as the top side of the quadrilateral.

S1302. Determine the extension direction of the frame of the analog imaging component according to the ordinates of the two vertices of the designated side.

On the basis of the above embodiments, it is possible to further determine whether point A is lower than point B according to the ordinates of point A and point B, that is, determine whether A_y_raw>=B_y_raw? It mainly includes the following two situations, as follows:

The first type, if A_y_raw>=B_y_raw, that is, point A is lower than point B, then it can be determined that the extension direction of the frame of the analog imaging component is along the direction of point B, that is, the upper left point of the frame of the analog imaging component Coordinate A' (A'_x=x_min, A'_y=y_min).

The second type, if A_y_raw<B_y_raw, that is, point A is higher than point B, then the extension direction of the frame of the simulated imaging component is along the direction of point a, that is, the coordinate A' of the upper left point of the frame of the simulated imaging component (A'_x=x_max-px_x, A'_y=y_min), according to the vertex coordinates of the optical-mechanical image, the process of determining the outer frame of the analog imaging element corresponding to the optical-mechanical image and the outer frame coordinates of the outer frame of the analog imaging element is completed process.

The following embodiments will specifically explain how to determine a new opto-mechanical image for correcting the projected image based on the first distance, the image correction function associated with the frame coordinates of the frame of the simulated imaging element, and the preset display ratio.

Optionally, in the above step S104: based on the first distance, the frame correction function associated with the frame coordinates of the frame of the simulated imaging component and the preset display scale, determine a new optomechanical image for correcting the projected frame, including:

S1401. Obtain a second distance that the first vertex moves relative to the corresponding initial vertex in the initial projection frame, where the initial projection frame is a projection frame before keystone correction.

Optionally, according to the ordinate of the first projected vertex in the optomechanical image, and the fitting function between the vertices of the optomechanical image and the vertices in the initial projected picture, the relationship between the first vertex in the projected picture and the first vertex in the initial projected picture is calculated. The vertex corresponds to the second distance moved by the initial vertex.

Optionally, there is a preset one-to-one correspondence between the vertex coordinate information of the optical machine image in the projection optical machine and the vertex coordinate information in the projection screen. As shown in FIG. 11 , it is assumed that the coordinate information of the first vertex of the projection screen ( The coordinate information of the coordinate information (marked as A_y) of the first projected point of the optical mechanical image in the projection optical machine and the vertical coordinate is: A_y=f(a_y), the above-mentioned first in the known optical mechanical image Under the premise of the coordinates of a projected point, that is, under the premise that A_y is known, only the function of a_y=f(A_y) needs to be obtained, and then the coordinates of the first projected vertex can be used to calculate the coordinates of the first vertex according to the function. Ordinate a_y.

Since the adopted A_y=f(a_y) formula is more complicated, the function a_y=f(A_y) calculated by matlab is more complicated. So choose to collect enough data and use polynomial fitting to obtain the function of a_y=f(A_y). Assuming that the resolution of the projection screen is (1920*1080), by default, a_y(0,1080] can be brought into the formula A_y=f(a_y) to obtain enough data, and then use polynomial fitting to obtain a fitting curve. Fitting The combined function is used in the code, and the results show that the difference between the front and rear a_y values is only a few pixels, and the picture has almost no sudden change.

Wherein, the obtained fitting function of a_y=f(A_y) can be shown as follows: a_y=(2*pow(10,-12)*pow(A_y,5)-2*pow(10,-9)*pow (A_y,4)+pow(10,-6)*pow(A_y,3)+pow(10,-4)*pow(A_y,2)+1.0091*(A_y)+0.9359).

Here, the ordinate of the first projected point of the optical-mechanical image is substituted into the above-mentioned fitting function of a_y=f(A_y), and the obtained a_y is the correspondence between the first vertex in the projected picture and the first vertex in the initial projected picture. The second distance to move the initial vertex. The second distance can be understood as a step value of the movement of the first vertex in the projection frame relative to the corresponding initial vertex in the initial projection frame.

Or, in one embodiment, referring to FIG. 10 , it can be seen that the y-axis direction (or it can also be understood There is a certain distance l1 in the vertical direction), so in order to reduce the error, when calculating the second distance, the ordinate -l1 of the first projected point can be used as A_y in the a_y=f(A_y) function to calculate the second distance .

In this embodiment, when it is necessary to obtain the second distance that the first vertex a1 shown in FIG. 11 moves with respect to the initial vertex a corresponding to the first vertex a1 in the initial projection frame.

Therefore, according to the ordinate A1_y of the first projected vertex A1 in the optomechanical image and the above-mentioned fitting function of a_y=f(A_y), the relative relationship between the first vertex a1 in the projected picture and the first vertex in the initial projected picture can be calculated. corresponds to the second distance aa1 of the movement of the initial vertex.

S1402. Determine a total moving distance based on the first distance and the second distance.

Optionally, according to the first distance a1a2 and the second distance aa1, the total moving distance aa2 of the first vertex in the initial projection frame during the correction process can be calculated. The total moving distance here can be understood as the accumulative step value of the movement of the first vertex in the projection picture relative to the corresponding initial vertex in the initial projection picture after responding to the first adjustment operation.

S1403. Determine the coordinates of the effective projection area of the new optical machine image according to the picture correction function associated with the total moving distance, the frame coordinates of the frame of the simulated imaging element, and the preset display scale.

Wherein, the picture correction function associated with the preset display ratio refers to the calculation formula for calculating the four-point coordinates of the effective projection area of the new light machine image in the projection light machine. Here, taking the preset display ratio of 16:9 as an example, X=(total moving distance/1080)*9 can be used as a known number, which can be brought into the calculation formula of calculating the four-point coordinates of the effective projection area of the new light machine image in the projection light machine, thereby calculating the effective projection area of the new light machine image coordinate of.

S1404. According to the coordinates of the effective projection area, update the optomechanical image corresponding to the projected picture, and obtain a new optomechanical image for correcting the projected picture.

In an achievable manner, the pixel values of each pixel in the effective projection area can be correspondingly adjusted, that is, the pixel values of each pixel in the corresponding opto-mechanical image of the projection screen can be updated, so that the image formed by the original opto-mechanical image It is transformed into imaging by the new optical machine image to obtain the new optical machine image for correcting the projected picture.

The following examples will be used to specifically explain how to determine the coordinates of the effective projection area of the new optical machine image according to the total moving distance, the frame coordinates of the frame of the simulated imaging element, and the screen correction function.

Optionally, continuing to refer to FIG. 11 , the trapezoidal correction is fully automatic trapezoidal correction, the area shape of the effective projection area is a right-angled trapezoid, and the effective projection area A2B2CD includes the first effective projection vertex A2 that has a mapping relationship with the first vertex in the projection screen, And the second effective projection vertex B2 that forms the hypotenuse of a right-angled trapezoid with the first effective projection vertex; the coordinates of the first effective projection vertex are A2 (x1, d1), and the coordinates of the second effective projection vertex are B2 (x2, d2); In the above step S1403: according to the picture correction function associated with the total moving distance, the outer frame coordinates of the simulated imaging component frame and the preset display ratio, determine the coordinates of the effective projection area of the new optical machine image, including:

S1601. Acquire a difference function for calculating the abscissa of the second effective projection vertex through the automatic trapezoidal correction algorithm and the shortcut correction algorithm; the shortcut correction algorithm is associated with the image correction function.

It should be noted that when the user enters the “Quick Keystone Correction Mode” after using keystone correction, the abscissa B2_x value of the second projected vertex will be calculated according to the ordinate A1_y value of the first projected vertex of the optical-mechanical image corresponding to the projected screen , but because the calculation method of "keystone correction" is different from the calculation method of "quick keystone correction", the calculated B2_x value will have a certain difference, so the outer frame of the outer frame of the simulated imaging component is directly based on the total moving distance The picture correction function associated with the coordinates and the preset display ratio determines the coordinates of the effective projection area of the Xinguangji image, which will cause the problem of sudden change in the corrected projection picture.

Therefore, in this embodiment, in order to solve the above-mentioned screen mutation problem, this application proposes that the difference between the abscissa of the second effective projection vertex calculated by the automatic trapezoidal correction algorithm and the shortcut correction algorithm can be obtained through multiple experimental fitting methods The function ΔBx=f(Ay).

S1602. Acquire coordinates of a first projected vertex in the optomechanical image that has a mapping relationship with the first vertex, where the coordinates of the first projected vertex are A1 (x0, y0).

S1603. Based on the ordinate of the first projected vertex and the difference function, determine the difference value of the abscissa of the second effective projected vertex currently calculated by the automatic keystone correction algorithm and the shortcut correction algorithm.

Optionally, based on the ordinate A1_y of the first projected vertex in the optomechanical image and the difference function ΔBx=f(Ay), the difference value ΔB2_x of the abscissa of the second effective projected vertex can be calculated.

S1604. Determine the calculation coordinates of the abscissa of the second effective projection vertex according to the image correction function associated with the total moving distance, the frame coordinates of the frame of the simulated imaging element, and the preset display scale.

Optionally, the calculated coordinates of the abscissa of the second effective projection vertex B2 can be further calculated according to the picture correction function associated with the total moving distance, the frame coordinates of the frame of the simulated imaging element, and the preset display ratio, denoted as B2_cx .

S1605. Determine the coordinates of the second effective projection vertex according to the calculated coordinates of the abscissa of the second effective projection vertex and the difference value between the abscissa of the second effective projection vertex.

In this embodiment, the calculated coordinate B2_cx of the abscissa of the second effective projection vertex and the difference value ΔB2_x of the abscissa of the second effective projection vertex can be added to calculate the coordinate B2_x of the second effective projection vertex, that is, B2_x=B2_c x+ΔB2_x.

Figure 12 is a schematic diagram of the first fitting function of the ordinate of the first projected vertex and the abscissa of the second effective projected vertex under the fully automatic keystone correction algorithm provided by the embodiment of the present application, and Figure 13 is a quick correction provided by the embodiment of the present application A schematic diagram of the second fitting function of the ordinate of the first projected vertex and the abscissa of the second effective projected vertex under the algorithm. Optionally, in the above step S1601: obtain the second effective keystone correction algorithm and shortcut correction algorithm to calculate the second effective Before projecting the difference function of the abscissa of the vertices, the method also includes:

S1701. Obtain the first fitting function of the ordinate of the first projection vertex and the abscissa of the second effective projection vertex under the automatic keystone correction algorithm.

In this embodiment, multiple sets of (Ay, Bx) data in the "AK" correction mode of several machines at various angles to the wall can be obtained through experiments, so that the first data shown in Figure 13 can be obtained by fitting. The first fitting function B2_x=f1(A1_y) of the ordinate of a projection vertex and the abscissa of a second effective projection vertex.

S1702. Obtain the second fitting function of the ordinate of the first projection vertex and the abscissa of the second effective projection vertex under the shortcut correction algorithm.

In this embodiment, and by adopting the above-mentioned same experimental method, several machines are collected at various angles to the wall in the "shortcut correction algorithm" correction mode, and the longitudinal direction of the first projected vertex as shown in Figure 14 is obtained. Coordinates and the first fitting function B2_x=f2(A1_y) of the abscissa of the second effective projection vertex.

S1703. Based on the first fitting function and the second fitting function, obtain a difference function for calculating the abscissa of the second effective projection vertex.

On the basis of the above-mentioned embodiment, the first fitting function B2_x=f1(A1_y) and the second fitting function B2_x=f2(A1_y) can be made a difference to obtain the difference function ΔB2_x of the abscissa of the second effective projection vertex =f1(A1_y)-f2(A1_y).

For example, the obtained fitting function of B2_x=f1(A1_y) may be as follows: f1(A1_y)=-5E-11x ⁵ +7E-08x ⁴ -4E-05x ³ +0.0066x ² -1.7351x+3837.9.

The obtained fitting function of the second fitting function B2_x=f2(A1_y) may be as follows: f2(A1_y)=-4E-0.6x ³ -0.0002x ² -1.0825x+3834.3.

When entering the "quick keystone correction" mode, calculate B2_cx and ΔB2_x according to A1_y, obtain the coordinates B2_x=B2_cx+ΔB2_x of the second effective projection vertex after compensation, and perform the calculation based on the coordinate B2_x of the second effective projection vertex after compensation Shortcut trapezoidal correction to obtain the corrected projection picture, in this way, the sudden change of the corrected projected picture is reduced, and there are only horizontal sudden changes at points B and C, and the sudden changes at points A and D are generally within a dozen Within the pixel (4K resolution), it effectively solves the problem of sudden changes in the corrected projection screen.

Optionally, the optical-mechanical image is a quadrilateral. In the above step S105: project according to the new optical-mechanical image to obtain a corrected projection image, including:

S2001. Generate an animation image associated with the optical-mechanical image and the new optical-mechanical image according to the vertex coordinates of the optical-mechanical image, the coordinates of the effective projection area, and a preset animation algorithm.

It should be noted that, in the embodiments provided above, although the pure fitting method can reduce the degree of sudden change of the obtained corrected projection picture, it cannot reduce the sudden change of points A and D.

Therefore, in this application, it is proposed to generate an animated image associated with the optical-mechanical image and the new optical-mechanical image based on the vertex coordinates of the optical-mechanical image corresponding to the projection image obtained above, the coordinates of the effective projection area, and the preset animation algorithm, so as to realize In addition to the use of fitting and animation processing, the animation is used to make a gradient effect between switching the optical-mechanical image to the calculated new optical-mechanical image, so that the user can hardly feel the corrected projection screen In this way, when the user adjusts the projection screen, the user has already switched from the optical-mechanical image to the "quick correction" mode screen when the user adjusts the screen, and there will be no sudden change in subsequent adjustments.

S2002. Perform projection according to the animation image to obtain a corrected projection image.

On the basis of the above-mentioned embodiments, projection can be performed according to the animation image generated above. Since the animation image is composed of multiple frame images, each frame image in the animation image is projected at a certain interval, so that in the future When the optical-mechanical image is switched to the new optical-mechanical image, the user can hardly feel the sudden change of the corrected projected picture, which effectively reduces the sudden change of the projected picture seen by the user, thereby improving the user's viewing experience.

The following embodiments will be used to specifically explain how to determine the coordinates of the second effective projection vertex according to the difference between the calculated coordinates of the abscissa of the second effective projection vertex and the abscissa of the second effective projection vertex.

Optionally, the optomechanical image is a quadrilateral. In the above step S1605: according to the calculated coordinates of the abscissa of the second effective projection vertex and the difference value between the abscissa of the second effective projection vertex, determine the coordinates of the second effective projection vertex, including:

S2101. Obtain a target correction coefficient.

It is worth noting that the target correction coefficient is calculated based on the abscissa of the second projected vertex of the optical-mechanical image, that is to say, when the user enters the quick and convenient correction mode for the first time, the target correction coefficient has been obtained in advance. The target correction factor will not change during the adjustment.

In this embodiment, the target correction coefficient can be obtained through the following calculation method.

Optionally, the above step of obtaining the target correction coefficient includes:

S2201. Calculate the calculated coordinates of the abscissa of the second projected vertex in the optomechanical image according to the second distance and the preset calculation formula for mapping between the vertices of the optomechanical image and the vertices in the initial projection image.

Optionally, it can be calculated according to the calculation formula of the first vertex a1 corresponding to the second distance aa1 moved by the initial vertex a in the initial projection picture shown in FIG. 11 and the above-mentioned four-point coordinates of the new optical machine image Calculated coordinate B1_cx of the abscissa of the second projected vertex in the optomechanical image.

The following is the calculation formula of a" in the 4-point coordinates of the Xinguang Machine image:

For this embodiment, Px in the above-mentioned formula is the second distance aa1, and a"_x is the calculated coordinate B1_cx of the abscissa of the second projected vertex, that is, Px in the above-mentioned formula is a known quantity, and a" The value of _x can be calculated to obtain the calculated coordinate B1_cx of the abscissa of the second projected vertex in the optical-mechanical image.

S2202. Calculate the target correction coefficient according to the calculated coordinates of the abscissa of the second projected vertex, the actual abscissa of the second projected vertex in the optomechanical image, and the difference value of the abscissa of the second projected vertex.

Wherein, the first initial projected vertex in the initial optical-mechanical image corresponding to the initial projected picture can be calculated according to the second distance and the preset mapping calculation formula between the vertex of the optical-mechanical image and the vertex in the initial projected picture, and then, according to the initial The difference function of the abscissa of the first initial projection vertex in the optomechanical image and the abscissa of the second effective projection vertex in the effective projection area corresponding to the corrected projection picture is calculated to obtain the difference value ΔB1_x of the abscissa of the second projection vertex in the optomechanical image.

In this embodiment, the actual abscissa B1_x of the second projection vertex in the optical-mechanical image and the calculated coordinate B1_cx of the abscissa of the second projection vertex can be calculated to obtain the actual abscissa of the second projection vertex in the optical-mechanical image The deviation between B1_x_raw and the calculated coordinate B1_cx; then, calculate the ratio of the deviation of "the actual abscissa B1_x and the calculated coordinate B1_cx of the second projected vertex in the optical-mechanical image" to the difference value ΔB1_x of the second projected vertex's abscissa, and the ratio It is called the target correction factor, and can also be written as: correct_factor=(B1_x_raw-B1_cx)/ΔB1_x.

Among them, correct_factor is the target correction factor.

S2102. Determine the coordinates of the second effective projection vertex based on the target correction coefficient, the calculated coordinates of the abscissa of the second effective projection vertex, and the difference value of the abscissa of the second effective projection vertex.

In this embodiment, in order to completely eliminate the abrupt change of the obtained corrected projection picture, the coordinates of the second valid projection vertex may also be determined in the following manner.

The following embodiments will specifically explain how to determine the coordinates of the second effective projection vertex based on the target correction coefficient, the calculated coordinates of the abscissa of the second effective projection vertex, and the difference value of the abscissa of the second effective projection vertex.

Optionally, determining the coordinates of the second effective projection vertex based on the target correction coefficient, the calculated coordinates of the second effective projection vertex abscissa and the difference value of the second effective projection vertex abscissa includes:

S2301. Detect whether the target correction coefficient is greater than or equal to a correction threshold.

Wherein, the correction threshold is a preset threshold set according to correction experience.

S2302. If yes, trigger the execution of determining the coordinates of the second effective projection vertex based on the target correction coefficient, the calculated coordinates of the abscissa of the second effective projection vertex, and the difference value of the abscissa of the second effective projection vertex.

It is worth noting that if the optical-mechanical image is the image after AK correction, the calculated target correction coefficient will not exceed the correction threshold. Only when the user manually corrects the projected screen with an excessively large amplitude will the threshold be exceeded. Case.

Therefore, in this application, it is proposed that if it is detected that the calculated target correction coefficient correct_factor is greater than or equal to the correction threshold, then triggering the execution of the calculation based on the target correction coefficient, the second effective projection vertex abscissa and the second effective projection vertex abscissa The difference value of the coordinates is used to further determine the coordinates B2_x of the second effective projection vertex, so that the coordinates of the second effective projection vertex can be corrected using the target correction coefficient, which can effectively solve the problem of screen mutation after the shortcut keystone correction is compatible with AK.

By using this embodiment, when the user performs AK correction or manually fine-tunes the AK picture and uses "quick keystone correction", there is no picture mutation at all, which effectively solves the problem of the projected picture change after correction.

When the range of the manual correction screen is too large, the corrected projection screen will have a partial mutation. If the user manually adjusts the range too large, the optical-mechanical image on the DMD is random. In order to correct the optical-mechanical image, this degree of mutation It is inevitable.

In another case, if the detection target correction coefficient is less than the correction threshold, trigger execution based on the difference between the calculated coordinates of the abscissa of the second effective projection vertex and the abscissa of the second effective projection vertex, and determine the coordinates of the second effective projection vertex .

Among them, in the process of implementing the above-mentioned embodiments, the following phenomena may usually occur: when the screen is projected on the left, when the AK avoids obstacles or manually adjusts the screen range too far to the right, use "quick keystone correction" to adjust the screen to the right all the time, When point A in the optomechanical image moves upward along the left edge of the analog imaging component frame, point B first moves along the upper edge to the upper right point and then remains stationary. When point A moves along the upper edge of the analog imaging component frame, When the edge moves to the right, point B moves down again.

FIG. 14 is a schematic diagram of changes in an opto-mechanical image during the correction process of a projected picture provided by an embodiment of the present application. As shown in Figure 14, when AK is used for obstacle avoidance or the manual adjustment of the screen is too large, the optomechanical image is too close to the right side, causing the calculated frame of the simulated imaging component to exceed the physical boundary of the real DMD.

Point B in the optical-mechanical image should have moved down after the upper boundary of the simulated imaging element frame moved to the right to point B', but because Bx exceeds the boundary, point B will not move first, when the calculated Bx After equal to B'x, point B will move down again.

Therefore, the solution proposed by this application: the ratio of the picture after Bx exceeds the boundary is all distorted, and the value of Bx needs to be limited, and when Bx exceeds the boundary, stop the calculation behind, so that the user cannot continue to adjust the picture to the right, which can be effective Solve the problem that the shortcut keystone correction screen is abnormal after manual adjustment of the screen range is too large.

The following describes the device, electronic equipment, and storage media for implementing the projection correction method provided by the present application. The specific implementation process and technical effects refer to the above, and will not be repeated below.

The function implemented by the projection correction device provided in the embodiment of the present application corresponds to the steps performed by the above method. The device can be understood as the above-mentioned projection light machine, or server, or the processor of the server, and can also be understood as a component that realizes the functions of this application under the control of the server independent of the above-mentioned server or processor. Optionally, the The device may include: an acquisition module 2500 , a response module 2501 , a determination module 2502 , and a projection module 2503 .

The obtaining module 2500 is configured to obtain a first adjustment operation for the first vertex of the projected picture on the projection correction page after keystone correction, the first adjustment operation is used to indicate: move the first vertex along the first direction by a first distance;

Response module 2501, configured to respond to the first adjustment operation and obtain the vertex coordinates of the corresponding optomechanical image of the projection screen;

The determining module 2502 is used to determine the outer frame of the simulated imaging component corresponding to the optomechanical image and the outer frame coordinates of the simulated imaging component frame according to the vertex coordinates of the optomechanical image; wherein, the outer frame of the simulated imaging component is a rectangular frame; based on the first 1. distance, frame coordinates of the frame of the simulated imaging element and a picture correction function, to determine the new optical machine image used to correct the projected picture;

The projection module 2503 is configured to perform projection according to the new optical machine image to obtain a corrected projection picture.

Optionally, the determination module 2502 is also used to:

According to the vertex coordinates of the optical-mechanical image, calculate the side length parameter of the frame of the analog imaging component;

According to the side length parameter of the frame of the simulated imaging component, the vertex coordinates of the frame of the simulated imaging component are calculated.

Optionally, the determination module 2502 is also used to:

According to the vertex coordinates of the optical-mechanical image, determine the circumscribing rectangle corresponding to the opto-mechanical image, wherein the opto-mechanical image is a quadrilateral, and the circumscribing rectangle is a rectangle matching the quadrilateral;

Determining the height parameter of the circumscribed rectangle as the height parameter of the frame of the simulated imaging component;

According to the height parameter of the frame of the simulated imaging component and the preset display ratio, the width parameter of the frame of the simulated imaging component is calculated.

Optionally, the optomechanical image is a quadrilateral, and the acquisition module is also used to acquire the ordinates of the two vertices of the specified side of the quadrilateral;

The determination module is further configured to determine the extension direction of the frame of the analog imaging component according to the ordinates of the two vertices of the specified side.

Optionally, the determination module 2502 is also used to:

Obtaining the second distance that the first vertex moves relative to the initial vertex corresponding to the first vertex in the initial projection picture, and the initial projection picture is the projection picture before trapezoidal correction;

determining a total distance moved based on the first distance and the second distance;

Determine the coordinates of the effective projection area of the new optical machine image according to the total moving distance, the outer frame coordinates of the simulated imaging component outer frame and the picture correction function;

According to the coordinates of the effective projection area, the optomechanical image corresponding to the projected picture is updated to obtain a new optomechanical image for correcting the projected picture.

Optionally, the trapezoidal correction is fully automatic trapezoidal correction, the area shape of the effective projection area is a right-angled trapezoid, the effective projection area includes a first effective projection vertex that has a mapping relationship with the first vertex, and forms a right-angled trapezoid with the first effective projection vertex The second effective projection vertex of the hypotenuse; the coordinates of the first effective projection vertex are (x1, d1), and the coordinates of the second effective projection vertex are (x2, d2);

The determining module 2502 is also used for:

Obtain the difference function of calculating the abscissa of the second effective projection vertex through the automatic keystone correction algorithm and the shortcut correction algorithm; the shortcut correction algorithm is associated with the picture correction function;

Obtain the coordinates of the first projected vertex in the optical-mechanical image that has a mapping relationship with the first vertex, and the coordinates of the first projected vertex are (x0, d0);

Based on the ordinate and the difference function of the first projected vertex, determine the difference value of the abscissa of the second effective projected vertex currently calculated by the fully automatic trapezoidal correction algorithm and the shortcut correction algorithm;

Determine the calculated coordinates of the abscissa of the second effective projection vertex according to the total moving distance, the outer frame coordinates of the simulated imaging element outer frame and the picture correction function;

The coordinates of the second effective projection vertex are determined according to the calculated coordinates of the abscissa of the second effective projection vertex and the difference value between the abscissa of the second effective projection vertex.

Optionally, before obtaining the difference function of calculating the abscissa of the second effective projection vertex through the automatic keystone correction algorithm and the shortcut correction algorithm, the obtaining module 2500 is also used for:

Obtain the first fitting function of the ordinate of the first projected vertex and the abscissa of the second effective projected vertex under the automatic keystone correction algorithm; obtain the ordinate of the first projected vertex and the abscissa of the second effective projected vertex under the shortcut correction algorithm A second fitting function: based on the first fitting function and the second fitting function, a difference function for calculating the abscissa of the second effective projection vertex is obtained.

Optionally, the optomechanical image is a quadrilateral, and the projection module 2503 is also used for:

According to the vertex coordinates of the optical-mechanical image, the coordinates of the effective projection area and the preset animation algorithm, an animation image associated with the optical-mechanical image and the new optical-mechanical image is generated;

Project according to the animation image to obtain the corrected projection screen.

Optionally, the obtaining module 2500 is also used to obtain the target correction coefficient;

The determination module 2502 is further configured to determine the coordinates of the second effective projection vertex based on the target correction coefficient, the calculated coordinates of the abscissa of the second effective projection vertex, and the difference value of the abscissa of the second effective projection vertex.

Optionally, the determination module 2502 is also used to:

Detect whether the target correction coefficient is greater than or equal to the correction threshold;

If so, trigger execution to determine the coordinates of the second effective projection vertex based on the target correction coefficient, the calculated coordinates of the abscissa of the second effective projection vertex, and the difference value of the abscissa of the second effective projection vertex.

Optionally, acquire module 2500, also for:

According to the second distance and the preset calculation formula of mapping between the vertex of the optical-mechanical image and the vertex in the initial projection screen, the calculated coordinates of the abscissa of the second projected vertex in the optical-mechanical image are calculated;

According to the calculated coordinates of the abscissa of the second projected vertex, the actual abscissa of the second projected vertex in the optomechanical image, and the difference value of the abscissa of the second projected vertex, the target correction coefficient is calculated.

Optionally, acquire module 2500, also for:

According to the ordinate of the first projection vertex in the optical-mechanical image, the fitting function between the preset vertex of the optical-mechanical image and the vertex in the initial projection image, calculate the first vertex in the projection image relative to the first vertex in the initial projection image The second distance that corresponds to the initial vertex movement.

The above-mentioned apparatus is used to execute the methods provided in the foregoing embodiments, and its implementation principles and technical effects are similar, and details are not repeated here.

The above modules may be one or more integrated circuits configured to implement the above method, for example: one or more specific integrated circuits (Application Specific Integrated Circuit, referred to as ASIC), or, one or more microprocessors (digital singnal processor, DSP for short), or, one or more Field Programmable Gate Arrays (Field Programmable Gate Array, FPGA for short), etc. For another example, when one of the above modules is implemented in the form of a processing element scheduler code, the processing element may be a general-purpose processor, such as a central processing unit (Central Processing Unit, referred to as CPU) or other processors that can call program codes. For another example, these modules can be integrated together and implemented in the form of a system-on-a-chip (SOC for short).

The above-mentioned modules may be connected or communicate with each other via a wired connection or a wireless connection. Wired connections may include metal cables, fiber optic cables, hybrid cables, etc., or any combination thereof. Wireless connections may include connections via LAN, WAN, Bluetooth, ZigBee, or NFC, etc., or any combination thereof. Two or more modules can be combined into a single module, and any one module can be divided into two or more units. Those skilled in the art can clearly understand that for the convenience and brevity of the description, the specific working process of the system and device described above can refer to the corresponding process in the method embodiment, which will not be repeated in this application.

It should be noted that the above modules may be one or more integrated circuits configured to implement the above method, for example: one or more specific integrated circuits (Application Specific Integrated Circuit, referred to as ASIC), or one or more micro Processor (Digital Singnal Processor, DSP for short), or one or more Field Programmable Gate Arrays (Field Programmable Gate Array, FPGA for short), etc. For another example, when one of the above modules is implemented in the form of a processing element scheduler code, the processing element may be a general-purpose processor, such as a central processing unit (Central Processing Unit, referred to as CPU) or other processors that can call program codes. For another example, these modules can be integrated together and implemented in the form of a System-on-a-chip (SOC for short).

An embodiment of the present application provides an electronic device, the apparatus may be integrated into a terminal device or a chip of the terminal device, and the terminal may be a computing device with a data processing function.

The device includes: a processor 2601 and a memory 2602 .

The memory 2602 is used to store programs, and the processor 2601 invokes the programs stored in the memory 2602 to execute the foregoing method embodiments. The specific implementation manner and technical effect are similar, and will not be repeated here.

Wherein, the memory 2602 stores program codes. When the program codes are executed by the processor 2601, the processor 2601 executes the projection correction method according to various exemplary embodiments of the present application described in the above-mentioned "Exemplary Method" section of this specification. various steps.

The processor 2601 can be a general-purpose processor, such as a central processing unit (CPU), a digital signal processor (Digital Signal Processor, DSP), an application specific integrated circuit (Application Specific Integrated Circuit, ASIC), a field programmable gate array (Field Programmable Gate Array, FPGA) or other programmable logic devices, discrete gate or transistor logic devices, and discrete hardware components can implement or execute the methods, steps, and logic block diagrams disclosed in the embodiments of the present application. A general purpose processor may be a microprocessor or any conventional processor or the like. The steps of the methods disclosed in connection with the embodiments of the present application may be directly implemented by a hardware processor, or implemented by a combination of hardware and software modules in the processor.

The memory 2602, as a non-volatile computer-readable storage medium, can be used to store non-volatile software programs, non-volatile computer-executable programs and modules. The memory may include at least one type of storage medium, such as flash memory, hard disk, multimedia card, card memory, random access memory (Random Access Memory, RAM), static random access memory (Static Random Access Memory, SRAM), Programmable Read Only Memory (PROM), Read Only Memory (ROM), Electrically Erasable Programmable Read-Only Memory (EEPROM), Magnetic Memory, Disk, discs and more. A memory is, but is not limited to, any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer. The memory 2602 in the embodiment of the present application may also be a circuit or any other device capable of implementing a storage function, and is used for storing program instructions and/or data.

Optionally, the present application further provides a program product, such as a computer-readable storage medium, including a program, and the program is used to execute the foregoing method embodiments when executed by a processor.

In the several embodiments provided in this application, it should be understood that the disclosed devices and methods may be implemented in other ways. For example, the device embodiments described above are only illustrative. For example, the division of the units is only a logical function division. In actual implementation, there may be other division methods. For example, multiple units or components can be combined or May be integrated into another system, or some features may be ignored, or not implemented. In another point, the mutual coupling or direct coupling or communication connection shown or discussed may be through some interfaces, and the indirect coupling or communication connection of devices or units may be in electrical, mechanical or other forms.

The units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or may be distributed to multiple network units. Part or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, each unit may exist separately physically, or two or more units may be integrated into one unit. The above-mentioned integrated units can be implemented in the form of hardware, or in the form of hardware plus software functional units.

The above-mentioned integrated units implemented in the form of software functional units may be stored in a computer-readable storage medium. The above-mentioned software functional units are stored in a storage medium, and include several instructions to enable a computer device (which may be a personal computer, server, or network device, etc.) or a processor (English: processor) to execute the functions described in various embodiments of the present application. part of the method. The aforementioned storage media include: U disk, mobile hard disk, read-only memory (English: Read-Only Memory, abbreviated: ROM), random access memory (English: Random Access Memory, abbreviated: RAM), magnetic disk or optical disc, etc. Various media that can store program code.

Claims

A projection correction method, characterized in that it comprises:

On the projection correction page after keystone correction, a first adjustment operation for the first vertex of the projected picture is obtained, the first adjustment operation is used to indicate: move the first vertex along a first direction by a first distance;

Responding to the first adjustment operation, acquiring the vertex coordinates of the optomechanical image corresponding to the projection screen;

According to the vertex coordinates of the optomechanical image, determine the outer frame of the analog imaging element corresponding to the optomechanical image and the outer frame coordinates of the outer frame of the analog imaging element; wherein, the outer frame of the analog imaging element is a rectangular frame;

Determine a new optomechanical image for correcting the projected image based on the first distance, the frame coordinates of the frame of the simulated imaging element, and a frame correction function associated with a preset display scale;

The projection is performed according to the image of the new optical machine, and the corrected projection picture is obtained.
The method according to claim 1, wherein, according to the vertex coordinates of the opto-mechanical image, the outer frame of the analog imaging component corresponding to the opto-mechanical image and the outer frame of the analog imaging component are determined coordinates, including:

According to the vertex coordinates of the optomechanical image, calculate the side length parameter of the frame of the analog imaging element;

According to the side length parameter of the frame of the simulated imaging component, the vertex coordinates of the frame of the simulated imaging component are calculated.
The method according to claim 2, wherein the calculation of the side length parameter of the frame of the simulated imaging element according to the vertex coordinates of the input image comprises:

Determine a circumscribing rectangle corresponding to the optomechanical image according to the vertex coordinates of the optomechanical image, wherein the optomechanical image is a quadrilateral, and the circumscribing rectangle is a rectangle matching the quadrilateral;

determining the height parameter of the circumscribed rectangle as the height parameter of the frame of the simulated imaging element;

The width parameter of the analog imaging element frame is calculated according to the height parameter of the analog imaging element frame and the preset display ratio.
The method according to claim 1, wherein the optomechanical image is a quadrilateral, and according to the vertex coordinates of the optomechanical image, the outer frame of the analog imaging element corresponding to the optomechanical image is determined, and the Before simulating the bounding box coordinates of the imaging component's bounding box, also include:

Obtain the ordinates of the two vertices of the specified side of the quadrilateral;

According to the vertical coordinates of the two vertices of the specified side, the extension direction of the frame of the analog imaging component is determined.
The method according to claim 1, characterized in that, based on the first distance, the frame correction function associated with the frame coordinates of the frame of the simulated imaging element and the preset display ratio, it is determined to correct the Xinguang machine image of the projected screen, including:

Obtaining a second distance of the first vertex moving relative to the initial vertex corresponding to the first vertex in the initial projection picture, the initial projection picture being the projection picture before the trapezoidal correction;

determining a total distance traveled based on the first distance and the second distance;

Determine the coordinates of the effective projection area of the new optical machine image according to the picture correction function associated with the total moving distance, the frame coordinates of the frame of the simulated imaging element, and the preset display ratio;

According to the coordinates of the effective projection area, the optomechanical image corresponding to the projection picture is updated to obtain a new optomechanical image for correcting the projection picture.
The method according to claim 5, wherein the trapezoidal correction is fully automatic trapezoidal correction, the area shape of the effective projection area is a right-angled trapezoid, and the effective projection area includes a map that has a mapping relationship with the first vertex. The first effective projection vertex of , and the second effective projection vertex forming the hypotenuse of a right-angled trapezoid with the first effective projection vertex; the coordinates of the first effective projection vertex are (x1, d1), and the second effective projection The coordinates of the vertex are (x2, d2);

The determination of the coordinates of the effective projection area of the new optical machine image according to the picture correction function associated with the total moving distance, the frame coordinates of the frame of the simulated imaging element and the preset display ratio includes:

Obtaining the difference function of calculating the abscissa of the second effective projection vertex through the automatic trapezoidal correction algorithm and the shortcut correction algorithm; the shortcut correction algorithm is associated with the picture correction function associated with the preset display ratio;

Obtain the coordinates of the first projected vertex in the optomechanical image that has a mapping relationship with the first vertex, and the coordinates of the first projected vertex are (x0, d0);

Based on the ordinate of the first projected vertex and the difference function, determine the difference value of the abscissa of the second effective projected vertex currently calculated by the fully automatic keystone correction algorithm and the shortcut correction algorithm;

Determine the calculated coordinates of the abscissa of the second effective projection vertex according to the total moving distance, the frame coordinates of the frame of the simulated imaging element, and a picture correction function associated with a preset display scale;

The coordinates of the second effective projection vertex are determined according to the calculated coordinates of the abscissa of the second effective projection vertex and the difference value between the abscissa of the second effective projection vertex.
The method according to claim 5, characterized in that, before the acquisition of the difference function of calculating the abscissa of the second effective projected vertex through the automatic trapezoidal correction algorithm and the shortcut correction algorithm, the method further comprises:

Obtaining the first fitting function of the ordinate of the first projection vertex and the abscissa of the second effective projection vertex under the automatic keystone correction algorithm;

Obtaining the second fitting function of the ordinate of the first projection vertex and the abscissa of the second effective projection vertex under the shortcut correction algorithm;

Based on the first fitting function and the second fitting function, a difference function for calculating the abscissa of the second effective projection vertex is obtained.
The method according to claim 5, wherein the optical-mechanical image is a quadrilateral, and the projection according to the new optical-mechanical image to obtain a corrected projection image includes:

generating an animation image associated with the optomechanical image and the new optomechanical image according to the vertex coordinates of the optomechanical image, the coordinates of the effective projection area, and a preset animation algorithm;

Projecting is performed according to the animation image to obtain a corrected projection picture.
The method according to claim 7, wherein the second effective projection vertex is determined according to the calculated coordinate of the second effective projection vertex abscissa and the difference value between the second effective projection vertex abscissa coordinates, including:

Obtain the target correction factor;

The coordinates of the second effective projection vertex are determined based on the target correction coefficient, the calculated coordinates of the abscissa of the second effective projection vertex, and the difference value of the abscissa of the second effective projection vertex.
The method according to claim 9, characterized in that, based on the target correction coefficient, the calculated coordinates of the abscissa of the second effective projection vertex, and the difference value of the abscissa of the second effective projection vertex, determine the Describe the coordinates of the second effective projection vertex, including:

Detecting whether the target correction coefficient is greater than or equal to a correction threshold;

If so, trigger the execution of the calculation based on the target correction coefficient, the calculated coordinates of the abscissa of the second effective projection vertex, and the difference value of the abscissa of the second effective projection vertex to determine the coordinates of the second effective projection vertex .
The method according to claim 9, wherein said obtaining the target correction coefficient comprises:

According to the second distance and the preset calculation formula of mapping between the vertex of the optical-mechanical image and the vertex in the initial projection picture, calculate the calculated coordinates of the abscissa of the second projected vertex in the optical-mechanical image;

The target correction coefficient is calculated according to the calculated coordinates of the abscissa of the second projected vertex, the actual abscissa of the second projected vertex in the optomechanical image, and a difference value of the abscissa of the second projected vertex.
The method according to claim 5, wherein the obtaining the second distance of the first vertex relative to the initial vertex in the initial projection picture moves, comprising:

According to the ordinate of the first projection vertex in the optical-mechanical image, the fitting function between the vertex of the optical-mechanical image and the vertex in the initial projection image, calculate the first vertex in the projection image Relative to the first vertex in the initial projection frame, the first vertex corresponds to a second distance moved by the initial vertex.
A projection correction device, characterized in that the device comprises:

An acquisition module, configured to acquire a first adjustment operation for the first vertex of the projected image on the projection correction page after keystone correction, and the first adjustment operation is used to indicate: align the first vertex along the first direction move the first distance;

A response module, configured to respond to the first adjustment operation and obtain the vertex coordinates of the optomechanical image corresponding to the projection screen;

A determining module, configured to determine the outer frame of the analog imaging element corresponding to the optomechanical image and the outer frame coordinates of the outer frame of the analog imaging element according to the vertex coordinates of the optomechanical image; wherein, the outer frame of the analog imaging element The frame is a rectangular frame; based on the first distance, the frame coordinates of the frame of the simulated imaging element and a frame correction function associated with a preset display ratio, determine a new optical-mechanical image for correcting the projected frame;

The projection module is configured to perform projection according to the new optical machine image to obtain a corrected projection picture.
An electronic device, characterized in that it includes: a processor, a storage medium and a bus, the storage medium stores program instructions executable by the processor, and when the electronic device is running, the processor and the storage medium communicate with each other through the bus, the processor executes the program instructions, so as to execute the steps of the method according to any one of claims 1 to 12 when executed.
A computer-readable storage medium, wherein a computer program is stored on the storage medium, and when the computer program is executed by a processor, the steps of the method according to any one of claims 1 to 12 are executed.