WO2022267595A1 - Procédé et appareil de correction de projection, dispositif et support de stockage - Google Patents

Procédé et appareil de correction de projection, dispositif et support de stockage Download PDF

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Publication number
WO2022267595A1
WO2022267595A1 PCT/CN2022/083560 CN2022083560W WO2022267595A1 WO 2022267595 A1 WO2022267595 A1 WO 2022267595A1 CN 2022083560 W CN2022083560 W CN 2022083560W WO 2022267595 A1 WO2022267595 A1 WO 2022267595A1
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vertex
projection
image
coordinates
correction
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PCT/CN2022/083560
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English (en)
Chinese (zh)
Inventor
冉宏威
王鑫
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成都极米科技股份有限公司
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Publication of WO2022267595A1 publication Critical patent/WO2022267595A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • H04N9/12—Picture reproducers
    • H04N9/31—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]
    • H04N9/3179—Video signal processing therefor
    • H04N9/3185—Geometric adjustment, e.g. keystone or convergence
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/74—Projection arrangements for image reproduction, e.g. using eidophor
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • H04N9/12—Picture reproducers
    • H04N9/31—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]

Definitions

  • the present application relates to the field of projection technology, and in particular, to a projection correction method, device, electronic equipment, and storage medium.
  • the commonly used keystone correction methods include automatic keystone correction (Auto Keystone, AK) and manual "4-point correction".
  • AK automatic keystone correction
  • 4-point correction manual "4-point correction"
  • 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.
  • the user manually adjusts the picture using "4-point correction there is currently no correction solution that can quickly correct the original image.
  • 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.
  • the embodiment of the present application provides a projection correction method, including:
  • 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;
  • 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;
  • the projection is performed according to the image of the new optical machine, and the corrected projection picture is obtained.
  • 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.
  • 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.
  • the processor executes machine-readable instructions to execute the steps of the projection correction method as provided in the first 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • FIG. 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;
  • FIG. 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.
  • the projected picture on the wall changes from a rectangular picture to a right-angled trapezoidal picture.
  • 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.
  • DMD Digital Micromirror Device
  • 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.
  • the method may include:
  • the "projection correction page” refers to a page used to correct the projection screen.
  • 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.
  • 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.
  • 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”
  • 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.
  • 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.
  • 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.
  • 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.
  • the optomechanical image and the area corresponding to the frame of the simulated imaging element corresponding to the optomechanical image can be clearly obtained.
  • 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.
  • 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.
  • 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;
  • 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.
  • any page such as a video playback page, a music playback page, etc.
  • 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.
  • the preset vertex is point a
  • 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.
  • the second adjustment control is pressed, the corresponding accumulated step value mstep is reduced by a fixed step value s.
  • the preset vertex changes accordingly, from point a to point b, which is not specifically limited in the present application.
  • the projection light machine 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.
  • 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 .
  • 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.
  • 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
  • the light map on the wall also does not change, and the picture is always moving within the range of the light map.
  • 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,
  • 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
  • the projected image fa'b'h2 on the wall is just a rectangular image 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.
  • 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.
  • 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.
  • L d3h2 corresponds to 1
  • L a'b' corresponds to K1
  • L h2b' corresponds to K
  • the light map ratio can also refer to the proportional relationship between K, K1 and 1, where,
  • 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.
  • 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.
  • the determined light diagram can be a right-angled trapezoid d3-a'-b'-h2 in the figure
  • 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.
  • 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.
  • the rectangular image f-g-m-h2 matching the preset display ratio can be determined in the light diagram of the projection screen.
  • the coordinates of the above-mentioned first intersection point g can be calculated 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 .
  • 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
  • the light source is O
  • the first light source curve can refer to Ob'
  • the second light source curve can refer to Ob"'
  • the included angle can refer to ⁇ B.
  • 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.
  • 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.
  • 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.
  • the specific implementation of the second step above is:
  • 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.
  • 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.
  • 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.
  • 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".
  • the keystone corrected picture can be conveniently corrected , which can effectively improve the efficiency of projected picture correction;
  • the accuracy of projected picture correction can be improved, and the user's viewing experience can be improved.
  • step S102 to step S105 can correct the projected picture from abcd to A1B1C1d.
  • 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
  • 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.
  • AK keystone correction
  • this solution is also applicable to the projected picture after optical zooming and zooming.
  • the first adjustment operation for the first vertex of the projected picture after optical zooming and zooming can still be obtained.
  • the first adjustment operation executes the above steps S102 to S105 to realize convenient correction of the screen.
  • 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.
  • the outer frame of the analog imaging component corresponding to the optical-mechanical image and the analog imaging 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.
  • 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.
  • 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:
  • 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.
  • the side length parameter of the frame of the simulated imaging device can be calculated according to the vertex coordinates of the optomechanical image.
  • calculating the side length parameter of the frame of the analog imaging component may include:
  • the resulting optical-mechanical image corresponding to the projected picture is not a standard right-angled trapezoid.
  • 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.
  • 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).
  • 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.
  • 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.
  • 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.
  • the extension direction of the simulated imaging component frame can also be determined according to the vertex coordinates of the optomechanical image.
  • the optomechanical image is a quadrilateral.
  • 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:
  • 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.
  • 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.
  • 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:
  • 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.
  • 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).
  • the second distance to move the initial vertex 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.
  • 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.
  • 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.
  • 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.
  • 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 trapezoidal correction is fully automatic trapezoidal correction
  • the area shape of the effective projection area is a right-angled trapezoid
  • 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)
  • the coordinates of the second effective projection vertex are B2 (x2, d2);
  • 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:
  • 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.
  • 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 ⁇ Bx f(Ay).
  • the difference value ⁇ B2_x of the abscissa of the second effective projected vertex can be calculated.
  • 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.
  • 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
  • Figure 13 is a quick correction provided by the embodiment of the present application
  • the optical-mechanical image is a quadrilateral.
  • step S105 project according to the new optical-mechanical image to obtain a corrected projection image, including:
  • 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 optomechanical image is a quadrilateral.
  • 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:
  • 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.
  • the target correction coefficient can be obtained through the following calculation method.
  • the above step of obtaining the target correction coefficient includes:
  • 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.
  • Px in the above-mentioned formula is the second distance aa1
  • 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
  • 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.
  • 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 ⁇ B1_x of the abscissa of the second projection vertex in the optomechanical image.
  • 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
  • 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.
  • 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.
  • 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:
  • the correction threshold is a preset threshold set according to correction experience.
  • the corrected projection screen 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.
  • 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 .
  • 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,
  • 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.
  • point A moves along the upper edge of the analog imaging component frame
  • 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.
  • 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 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.
  • 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.
  • the determination module 2502 is also used to:
  • the vertex coordinates of the frame of the simulated imaging component are calculated.
  • the determination module 2502 is also used to:
  • 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;
  • the width parameter of the frame of the simulated imaging component is calculated.
  • the optomechanical image is a quadrilateral
  • 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.
  • the determination module 2502 is also used to:
  • the optomechanical image corresponding to the projected picture is updated to obtain a new optomechanical image for correcting the projected picture.
  • 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:
  • 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 obtaining module 2500 is also used for:
  • the optomechanical image is a quadrilateral
  • the projection module 2503 is also used for:
  • an animation image associated with the optical-mechanical image and the new optical-mechanical image is generated
  • 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.
  • the determination module 2502 is also used to:
  • acquire module 2500 also for:
  • the calculated coordinates of the abscissa of the second projected vertex in the optical-mechanical image are calculated
  • the target correction coefficient is calculated.
  • acquire module 2500 also for:
  • 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 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.
  • ASIC Application Specific Integrated Circuit
  • DSP digital singnal processor
  • FPGA Field Programmable Gate Array
  • 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.
  • CPU central processing unit
  • 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.
  • 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.
  • ASIC Application Specific Integrated Circuit
  • DSP Digital Singnal Processor
  • FPGA Field Programmable Gate Array
  • 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.
  • CPU Central Processing Unit
  • these modules can be integrated together and implemented in the form of a System-on-a-chip (SOC for short).
  • SOC System-on-a-chip
  • 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.
  • the memory 2602 stores program codes.
  • 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 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.
  • 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.
  • a program product such as a computer-readable storage medium, including a program
  • the disclosed devices and methods may be implemented in other ways.
  • the device embodiments described above are only illustrative.
  • the division of the units is only a logical function division. In actual implementation, there may be other division methods.
  • multiple units or components can be combined or May be integrated into another system, or some features may be ignored, or not implemented.
  • 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.
  • 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.
  • ROM Read-Only Memory
  • RAM Random Access Memory
  • magnetic disk or optical disc etc.

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  • Projection Apparatus (AREA)

Abstract

La présente demande se rapporte au domaine technique de la projection et concerne un procédé et un appareil de correction de projection, un dispositif et un support de stockage. Le procédé consiste : dans une page de correction de projection après une correction de trapèze, à obtenir une première opération de réglage pour un premier sommet d'un écran de projection ; en réponse à la première opération de réglage, à obtenir des coordonnées de sommet d'une image de moteur lumière correspondant à l'écran de projection ; à déterminer, en fonction des coordonnées de sommet de l'image de moteur lumière, un cadre externe d'un élément d'imagerie simulé correspondant à l'image du moteur lumière, et des coordonnées du cadre externe de l'élément d'imagerie simulé, le cadre externe de l'élément d'imagerie simulé étant un cadre rectangulaire ; sur la base d'une première distance, des coordonnées du cadre externe de l'élément d'imagerie simulé et d'une fonction de correction d'écran associée à une échelle d'affichage prédéfinie, à déterminer une nouvelle image de moteur lumière pour corriger l'écran de projection ; et à réaliser une projection selon la nouvelle image de moteur lumière pour obtenir un écran de projection corrigé. Dans la présente demande, d'une part, l'écran soumis à une correction de trapèze peut être corrigé de manière appropriée ; d'autre part, en introduisant la fonction de correction d'écran associée à l'échelle d'affichage prédéfinie, la précision de la correction d'écran de projection est améliorée.
PCT/CN2022/083560 2021-06-25 2022-03-29 Procédé et appareil de correction de projection, dispositif et support de stockage WO2022267595A1 (fr)

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