CN113949852A - Projection method, projection apparatus, and storage medium - Google Patents
Projection method, projection apparatus, and storage medium Download PDFInfo
- Publication number
- CN113949852A CN113949852A CN202010693788.4A CN202010693788A CN113949852A CN 113949852 A CN113949852 A CN 113949852A CN 202010693788 A CN202010693788 A CN 202010693788A CN 113949852 A CN113949852 A CN 113949852A
- Authority
- CN
- China
- Prior art keywords
- projection
- image
- real
- lens
- projection position
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000000034 method Methods 0.000 title claims abstract description 96
- 230000003287 optical effect Effects 0.000 claims abstract description 63
- 238000013459 approach Methods 0.000 claims abstract description 24
- 238000012360 testing method Methods 0.000 claims description 61
- 238000001514 detection method Methods 0.000 claims description 4
- 230000003044 adaptive effect Effects 0.000 claims description 3
- 230000008569 process Effects 0.000 abstract description 27
- 230000000694 effects Effects 0.000 abstract description 13
- 230000015556 catabolic process Effects 0.000 abstract description 3
- 238000006731 degradation reaction Methods 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 18
- 230000009467 reduction Effects 0.000 description 10
- 238000003384 imaging method Methods 0.000 description 8
- 230000004927 fusion Effects 0.000 description 7
- 238000013519 translation Methods 0.000 description 7
- 238000004364 calculation method Methods 0.000 description 6
- 230000010365 information processing Effects 0.000 description 6
- 238000012545 processing Methods 0.000 description 6
- 230000008859 change Effects 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 5
- 238000004891 communication Methods 0.000 description 3
- 230000006870 function Effects 0.000 description 3
- 238000013461 design Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000004044 response Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 238000004590 computer program Methods 0.000 description 1
- 238000013500 data storage Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000013507 mapping Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000009877 rendering Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
Images
Classifications
-
- 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]
- H04N9/3141—Constructional details thereof
-
- 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]
-
- 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
- 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]
- H04N9/3191—Testing thereof
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Physics & Mathematics (AREA)
- Geometry (AREA)
- Projection Apparatus (AREA)
- Controls And Circuits For Display Device (AREA)
- Transforming Electric Information Into Light Information (AREA)
Abstract
The embodiment of the application discloses a projection method, a projection device and a storage medium, wherein a display image is projected by a first light source, a reference image is projected by a second light source at a preset time interval, a real-time projection position corresponding to the reference image is acquired, whether the real-time projection position is different from a target projection position is judged, if yes, an optical axis for projecting the display image is adjusted, so that the real-time projection position approaches to the target projection position, therefore, under the condition that the acquired real-time projection position corresponding to the reference image projected by the second light source at the preset time interval is different from the target projection position, the real-time projection position can approach to the target projection position by adjusting the optical axis for projecting the display image, and the projection effect is adjusted in the process of not influencing the projection of the display image, to overcome the problem of the degradation of the quality of the projected image due to pixel shift.
Description
Technical Field
The present application relates to the field of projection technologies, and in particular, to a projection method, a projection apparatus, and a storage medium.
Background
A projector, also called a projector, is a device that can project images or videos onto a curtain, and can be connected with a computer, a VCD, a DVD, a BD, a game machine, a DV, etc. through different interfaces to play corresponding video signals. With the development of projection technology, projectors are widely applied to various conferences and teaching, and great convenience is brought to daily life of people. However, a large amount of heat is generated during the operation of the projector, and the optical engine and the lens of the projector are heated during the operation process to generate thermal deformation, so that a certain degree of pixel shift is generated on the picture emitted to the screen, the loss or serious quality degradation of the imaging content is caused, and the projection effect and the viewing experience of the user are affected.
Disclosure of Invention
In view of the above, the present application proposes a projection method, a projection apparatus, and a storage medium to improve the above problem.
In a first aspect, an embodiment of the present application provides a projection method, which may be applied to a projection system, and the method includes: projecting a display image by a first light source and a reference image by a second light source at preset time intervals, the display image and the reference image having the same projection optical axis; acquiring a real-time projection position corresponding to the reference image; judging whether the real-time projection position is different from the target projection position or not; and if so, adjusting the optical axis for projecting the display image so as to enable the real-time projection position to approach the target projection position.
In a second aspect, an embodiment of the present application provides a projection method, which may be applied to a projection system, and the method includes: projecting a display image by a first light source and a reference image by a second light source at preset time intervals, the display image and the reference image having different projection optical axes; acquiring a real-time projection position corresponding to the reference image; judging whether the real-time projection position is different from the target projection position or not; and if so, adjusting the optical axis for projecting the display image so as to enable the real-time projection position to be adaptive to the target projection position.
In a third aspect, an embodiment of the present application provides a projection device, which includes a picture acquisition module, a pixel shift detection module, an adjustment module, one or more processors, and a memory; one or more programs stored in the memory and configured to be executed by the one or more processors, the one or more programs configured to perform the methods of the first or second aspects described above.
In a fourth aspect, the present application provides a computer-readable storage medium, in which a program code is stored, wherein when the program code runs, the method of the first aspect or the second aspect is performed.
According to the projection method, the projection equipment and the storage medium provided by the application, the display image is projected through the first light source, the reference image is projected through the second light source at the preset time interval, wherein the display image and the reference image have the same projection optical axis, the real-time projection position corresponding to the reference image is obtained, whether the real-time projection position is different from the target projection position or not is judged, if yes, the optical axis for projecting the display image is adjusted, so that the real-time projection position approaches to the target projection position, therefore, under the condition that the real-time projection position corresponding to the reference image projected by the second light source at the preset time interval is different from the target projection position, the real-time projection position can approach to the target projection position by adjusting the optical axis for projecting the display image, therefore, the projection effect can be adjusted in the process of not influencing the projection of the display image, and the problem of the reduction of the quality of the projection image caused by pixel offset is solved.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 shows an exemplary diagram of a pixel shift of a projected image in the prior art.
Fig. 2 shows a schematic structural diagram of a projection system proposed in an embodiment of the present application.
Fig. 3 shows a flowchart of a method of a projection method according to an embodiment of the present application.
Fig. 4 shows a schematic structural diagram of the color wheel in the embodiment of the present application.
Fig. 5 is a timing chart illustrating a modulation of the projection position by the light modulation device in the embodiment of the present application.
Fig. 6 is a schematic optical path diagram illustrating a light modulation device modulating a projection position according to an embodiment of the present application.
Fig. 7 is a schematic diagram illustrating a positional relationship between a lens corresponding to a picture capturing module and a projection lens corresponding to a projection device in an embodiment of the present application.
Fig. 8 shows a flowchart of a method of a projection method according to another embodiment of the present application.
Fig. 9 shows a method flowchart of step S240 in fig. 8.
FIG. 10 illustrates an example diagram of a projected target test pattern provided by an embodiment of the present application.
FIG. 11 is a diagram illustrating an example of one implementation of adjusting an optical axis of a projected display image in an embodiment of the application.
Fig. 12 shows an example diagram of the adjustment implementation principle corresponding to the embodiment in fig. 11.
Fig. 13 is a diagram showing an example of another embodiment of adjusting the optical axis of the projection display image in the embodiment of the present application.
Fig. 14 shows a method flowchart of a projection method according to another embodiment of the present application.
Fig. 15 is a flowchart illustrating a method of a projection method according to still another embodiment of the present application.
FIG. 16 illustrates another example diagram of a projected target test pattern provided by the present embodiment.
FIG. 17 is a diagram illustrating yet another example of a projected target test pattern provided by the present embodiment.
Fig. 18 is a flow chart of a method of projection according to still another embodiment of the present application.
FIG. 19 is a diagram illustrating an example of a principle of determining a projection position of a target in a case of a plurality of projection apparatuses according to an embodiment of the present application.
Fig. 20 is a block diagram illustrating a projection apparatus according to the present application for performing a projection method according to an embodiment of the present application.
Fig. 21 illustrates a storage unit of an embodiment of the present application for storing or carrying program codes for implementing a projection method according to an embodiment of the present application.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
With the development of projection technology, projectors are widely applied to various conferences and teaching, and great convenience is brought to daily life of people. However, the inventor of the present invention found in research that, the efficiency of converting electricity into light in the operation process of the projector is less than 10%, and a large amount of heat is generated in the operation process, so that some of the elements, especially elements in the optical path (for example, an optical engine and a lens of the projector), are heated to generate thermal deformation, for example, a structural member of a fixed display chip in the optical engine is heated to expand and a lens and a structural member inside the lens are heated to expand, so that a certain degree of pixel shift of a picture emitted to a screen is generated, and the picture pixel shift is accompanied by a certain degree of picture defocusing.
When the design of the optical machine and the lens of the projector can better meet the use requirement, the problem of picture defocusing is not serious, and the picture quality is in an acceptable degree. However, if the projector optical engine and the lens are designed generally, the performance of the projector may be greatly reduced due to the out-of-focus of the image caused by the pixel shift, and optionally, two more common usage scenarios in which the projector optical engine and the lens are greatly affected are as follows: when a plurality of projectors are fused, the projection pictures of two adjacent projectors are overlapped to a certain extent, as shown in a fusion area in fig. 1. Because the pixel offset of the projectors is influenced by a plurality of factors, such as ambient temperature, luminance of emergent light, design of an optical machine lens and the like, the offset of the two projectors has certain difference and has larger repeatability. When the fusion area displays the content with the static single-pixel width and the pixel offset is between 1-2 pixels, the images of the fusion area of the two projector images will have double images under certain conditions, resulting in serious reduction of the imaging quality, such as the Chinese character 'zhong' in fig. 1. When the picture projected by the projector needs to be matched with the projection screen, the projection screen is fixed on the projection surface, and the movement of the projection picture can cause the picture to exceed the frame of the screen, so that the loss of the imaging content or the serious quality reduction is caused.
In the prior art, the picture quality is generally improved by adopting a mode of starting up the projector in advance each time, or the deviation of 1-2 pixels is allowed by adopting a mode of making the edge of a frame larger than a projection picture, although the picture quality reduction caused by the pixel deviation can be avoided to a certain extent when the projector is used, the picture quality is still not high, and the problem of reducing the visual experience of a user still exists.
Therefore, in order to improve the above problem, the present application provides a projection method and a projection apparatus, which can adjust the projection effect during the process of not affecting the projection of the display image by adjusting the optical axis of the projection display image so that the real-time projection position can approach the target projection position when the real-time projection position corresponding to the acquired reference image projected by the second light source at the preset time interval is different from the target projection position, so as to overcome the problem of the quality reduction of the projection image due to the pixel offset.
The projection system related to the projection method provided by the embodiment of the present application is described first.
Fig. 2 is a schematic structural diagram of a projection system 10 according to an embodiment of the present disclosure. The projection control system 10 includes a projection imaging module 11, a picture acquisition module 12, an information processing module 13, and an actuator 14. The projection imaging module 11 is electrically connected to the image acquisition module 12, the image acquisition module 12 is electrically connected to the information processing module 13, and the information processing module 13 is electrically connected to the actuator 14.
As a mode, the projection imaging module 11 is configured to project various text data or audio/video data that need to be projected, and the specific projection content may not be limited, and the picture acquisition module 12 is configured to acquire a real-time projection position corresponding to the reference image. The information processing module 13 is configured to determine whether a difference exists between the real-time projection position and a target projection position (which may be a pre-stored target projection position), and if the difference exists, convert the difference between the real-time projection position and the target projection position into a position adjustment instruction and send the position adjustment instruction to the actuator 14, so that the actuator 14 may adjust an optical axis of the projection display image according to the position adjustment instruction, so that the real-time projection position approaches the target projection position, that is, the real-time projection position is the same as the target projection position, or the real-time projection position approaches the target projection position infinitely.
Embodiments of the present application will be described in detail below with reference to the accompanying drawings.
Referring to fig. 3, an embodiment of the present application provides a projection method applied to a projection system, the method including:
step S110: a display image is projected by a first light source and a reference image is projected by a second light source at preset time intervals.
Optionally, the first light source and the second light source in this embodiment may be light sources emitted by the same projection device, or light sources emitted by different projection devices. The first light source and the second light source may be the same light source (which may be understood herein as the same light source) or different light sources. For example, in one implementation, the first light source and the second light source may both emit visible light; in another implementation, the first light source may emit visible light and the second light source may emit infrared light.
Wherein the display image may be understood as a projection picture projected onto a projection plane (the projection picture is smaller than the projection plane, for example, the projection plane may be a wall, and the projection picture is an area on the wall for displaying the projection picture), and the reference image may be understood as a test pattern projected at a preset time interval during the projection of the display image, and the test pattern may be used for testing whether there is a difference between the position of the projected reference image and the target projection position.
Alternatively, the display image and the reference image in the present embodiment may have the same projection optical axis. For example, assuming that the first light source and the second light source are the same light source, the projection optical axes of the display image and the reference image may both be the optical axis of the optical portion of the projector.
Optionally, the projection system in this embodiment may include a color wheel, wherein the color wheel may receive the light of the light source and sequentially emit three color sequential lights, such as red, green and blue, and the color wheel in this embodiment is briefly described with reference to fig. 4 as an example below:
as shown in fig. 4, the color wheel 50 is located on a light path where light source light emitted by the light source is located, the color wheel 50 includes at least two segment areas 51, a period from when a light spot formed on the color wheel 50 by the light source light emitted by the light source irradiates across two adjacent segment areas 51 to when the light spot irradiates across two segment areas 51 is a spoke period, and an area irradiated by the light spot in the spoke period constitutes a spoke area 52; one spoke region 52 is divided into two spoke regions (511 in fig. 15) which are respectively located in two adjacent segment regions 51, and a region other than the spoke region 52 included in the two adjacent segment regions 51 constitutes a non-spoke region 513. In this manner, the preset time interval may be the time interval during which the color wheel rotates to the spoke region, i.e., the second light source may project the reference image during the time interval during which the color wheel rotates to the spoke region.
In a specific application scenario, assuming that the first light source emits visible light and the second light source emits infrared light, the step of projecting the reference image by the second light source at the preset time interval may be: and when the color wheel rotates into the spoke area corresponding to the color wheel, the visible light source is closed, and the infrared test pattern is projected. Illustratively, stray light of visible light is bright, and the signal-to-noise ratio of the projection position where the visible light camera is used to collect the projection image is poor, so that the calculation accuracy of the latest projection position of the obtained display image is poor. In this case, the visible light camera may be replaced by an infrared camera, and an infrared signal actively transmitted by the projector is used as information acquired by the image acquisition module. Optionally, wavelengths other than those projected by the projector may be added before the camera, and the infrared signal may be displayed within the aforementioned preset time interval, for example, the time of processing spoke by DMD may be used to display the infrared signal.
For example, in one specific application scenario, as shown in fig. 5, the image displayed in the non-spoke region 61 is in a modulated state, and the image displayed in the spoke region 62 is in a non-modulated state, as a way, the power of the visible light source can be in a turned-off state and the power of the infrared light source can be in a turned-on state in the spoke region, in this way, the infrared test pattern can be projected in the spoke region to realize the adjustment of the projection lens in the spoke region.
Referring to fig. 6, a light path diagram corresponding to the projection process of fig. 5 is shown, as shown in fig. 6, the light source module includes infrared light and visible light, and the infrared light and the visible light are combined into the same light path through the dichroic filter 63 by using a wavelength combining method, optionally, a separate infrared light source is used for the infrared light in the diagram shown in fig. 6, and the wavelength may be 850nm or 940 nm. Optionally, in practical implementation, the infrared light may also be implemented in a laser fluorescence manner, that is, laser light with a wavelength shorter than that of infrared light is used to excite the infrared fluorescent powder, and the short wavelength may be blue laser or other laser light. The light emitted by the light source module is relayed to the display chip DMD through the optical machine module, and the light modulated by the display chip is projected onto the screen through the lens module. It should be noted that in this embodiment, a single-chip DMD, a double-chip DMD, or a three-chip DMD, or a single-chip LCD, a double-chip LCD, or a three-chip LCD, may all be implemented by using the same principle, and details are not described herein again.
Optionally, as another embodiment, the visible light source may also be projected without turning off the visible light source when the color wheel rotates into the spoke region corresponding to the color wheel, in this way, the projection lens may be adjusted according to the test patterns of the other light sources, and the specific modulation principle and the modulation process may refer to the description in the foregoing embodiment, and are not described herein again.
It should be noted that, in this embodiment, the image capturing module is mounted at a position that is less affected by a temperature change caused by a process of a change of turning on and turning off the projector, for example, the image capturing module may be fixed on a bottom plate of the whole projector and not directly connected to the optical engine and the lens.
As shown in fig. 7, the projection ratio of the lens corresponding to the image capturing module and the projection ratio of the projection lens of the projection apparatus in the zoom state satisfy the following formula:
the field angle of the lens corresponding to the picture acquisition module and the field angle of the projection lens of the projection equipment in the zooming state meet the formula:
wherein, TRcameraThe projection ratio of the corresponding lens of the picture acquisition module is represented,
characterizing the maximum throw ratio, FOV, of a projection lens of a projection device in a zoom statecameraThe representation picture acquisition module corresponds to the field angle of the lens,
and characterizing the maximum field angle of the projection lens of the projection device in a zoom state.
Optionally, the image resolution of the image acquired by the image acquisition module can resolve a single pixel of the imaging image when the projection lens of the projection device is in the minimum field angle state, and the angular resolution of the lens corresponding to the image acquisition module satisfies the requirementThe following equation:
wherein,
and N represents the number of pixels of one side containing a large number of pixels.
Optionally, the pixel resolution of the lens corresponding to the image acquisition module is greater than the pixel resolution of the projection lens of the projection device. The pixel size of the acquisition chip corresponding to the picture acquisition module is small enough: suppose the pixel size of the projection display chip is aprojectorThen the side length of the pixel on the projection picture is Pprojector＝aprojector*MprojectorWhen the projector lens zooms to reach the maximum projection ratio, the magnification of the corresponding collector lens corresponds to the minimum value
The pixel size of the image acquisition module is
Because the pixel size and the resolution ratio of the display chip are determined, the image magnification of the projection equipment is in direct proportion to the field angle of the projection equipment, and the image magnification can be obtained
Optionally, the actuator in this embodiment of the application may be a voice coil motor, or may also be a piezoelectric ceramic or the like to execute the command sent by the information processing module.
Optionally, the update frequency of the image position may comprehensively consider the time frequency of the large change of the picture position, the response frequency of the information acquisition module and the information processing module, and the response frequency of the actuator capable of executing the action.
It will be appreciated that there is a time interval between different image frames of the projected image and as a way of doing so, the present embodiment may project a feature pattern within the interval between different image frames, which feature pattern is then used as the target test pattern. Optionally, for the specific projection process of the target test pattern and the adjustment process of the projection position in this embodiment, reference may be made to the description in the foregoing embodiment, and details are not repeated here.
Step S120: and acquiring a real-time projection position corresponding to the reference image.
As an implementation manner, the projection plane and the projection distance may be obtained (the specific obtaining principle and obtaining process of the projection distance may refer to the related technology, which is not described herein again), and the real-time projection position corresponding to the reference image is obtained according to the projection plane and the vertex coordinates. As another embodiment, a projection frequency at which the second light source projects the reference image may be obtained, and a real-time projection position corresponding to the reference image may be obtained according to the projection frequency.
Step S130: and judging whether the real-time projection position is different from the target projection position.
The target projection position may be understood as a position of a projection display image stored in advance. Optionally, whether the real-time projection position is different from the target projection position or not may be determined by comparing the position coordinate of the real-time projection position with the position coordinate of the target projection position, and optionally, if the position coordinate of the real-time projection position is different from the position coordinate of the target projection position, it may be determined that the real-time projection position is different from the target projection position; if the position coordinates of the real-time projection position are the same as the position coordinates of the target projection position, it can be determined that there is no difference between the real-time projection position and the target projection position.
Step S140: the optical axis of the projected display image is adjusted so that the real-time projection position approaches the target projection position.
As an embodiment, if it is determined that the real-time projection position is different from the target projection position, it may be determined that the projected display image has a pixel shift, and in this embodiment, the pixel shift may be avoided by adjusting the optical axis of the projected display image so that the real-time projection position approaches the target projection position. For example, the offset direction and the offset amount of the display image on the projection plane may be calculated according to the projection plane and the measured projection distance, so that the optical axis of the projected display image may be adjusted according to the offset direction and the offset amount.
Optionally, if there is no difference between the position coordinate of the real-time projection position and the target projection position, the determination process may be ended.
The application provides a projection method, which projects a display image through a first light source, and projects a reference image at a preset time interval through a second light source, wherein the display image and the reference image have the same projection optical axis, then a real-time projection position corresponding to the reference image is obtained, whether the real-time projection position is different from a target projection position is judged, if yes, the optical axis for projecting the display image is adjusted, so that the real-time projection position approaches to the target projection position, therefore, under the condition that the real-time projection position corresponding to the reference image projected at the preset time interval by the second light source and the target projection position are different, the optical axis for projecting the display image can be adjusted, so that the real-time projection position approaches to the target projection position, and the projection effect can be adjusted in the process of not influencing the projection of the display image, to overcome the problem of the degradation of the quality of the projected image due to pixel shift.
Referring to fig. 8, another embodiment of the present application provides a projection method applied to a projection system, the method including:
step S210: a display image is projected by a first light source and a reference image is projected by a second light source at preset time intervals.
Step S220: and acquiring a real-time projection position corresponding to the reference image.
Step S230: and judging whether the real-time projection position is different from the target projection position.
Step S240: obtaining an offset parameter corresponding to the difference according to the target test pattern.
The reference image in this embodiment may be a target test pattern, and specific contents (for example, a pattern style and the number of patterns) of the target test pattern may be set according to actual requirements. For example, the pattern shape of the target test pattern may be a triangle, a square, a rectangle, etc., and the pattern content of the target test pattern may be a stripe, a square, etc., and may not be limited specifically. The outline size of the target test pattern may be equal to the outline of the projection screen, or the outline size of the target test pattern may be smaller than the outline of the projection screen.
As one mode, if it is determined that there is a difference between the real-time projection position and the target projection position, an offset parameter corresponding to the difference may be acquired from the target test pattern. Alternatively, the offset parameters and the offset amount can be understood as the offset direction and the offset amount of the real-time projection position relative to the target projection position. The specific acquisition process of the offset parameter can be referred to the following description.
Referring to fig. 9, as an approach, step S240 may include:
step S241: and acquiring a first coordinate corresponding to the target projection position.
Alternatively, the target projection position may be a vertex of the projection screen, and the first coordinate may be a position coordinate of the vertex.
Step S242: and acquiring a second coordinate corresponding to the real-time projection position based on the target test pattern.
As an implementation manner, the second coordinate corresponding to the real-time projection position may be obtained based on the target test pattern, for example, the projection distance of the target test pattern may be obtained, and then the second coordinate corresponding to the real-time projection position may be obtained according to the projection distance and the vertex of the target test pattern.
For example, in a specific application scenario, please refer to fig. 10, which shows an exemplary diagram of a target test pattern projected according to an embodiment of the present application, and as shown in fig. 10, the vertices of a projection frame 21 are a0、B0、C0、D0Vertex A0、B0、C0、D0Corresponding coordinate is X0＝[XA0,XB0,XC0,XD0]，Y0＝[yA0,yB0,yC0,yD0]The vertices of the target test pattern 22 are A, B, C, D, respectively, and optionally, assuming that the projection distance of the target test pattern 22 is d, the vertices A may be combined0、B0、C0、D0Corresponding coordinate X0＝[XA0,XB0,XC0,XD0]，Y0＝[yA0,yB0,yC0,yD0]And the coordinates corresponding to the vertex A, B, C, D calculated by the projection distance d are each X ═ XA,XB,XC,XD]，Y＝[yA,yB,yC,yD]The second coordinate corresponding to the real-time projection position may be obtained, where the specific calculation principle and calculation process may refer to related technologies, which are not described herein again.
Step S243: and acquiring the offset direction and the offset of the second coordinate relative to the first coordinate based on a specified rule.
Optionally, the specified rule in this embodiment may be a formula [ X, Y [ ]]＝M*[X0,Y0]+ V, wherein, [ X, Y]Coordinates of vertices representing a target test pattern, M represents a scaling factor of a current projection screen relative to a pre-stored initial projection screen, V represents an amount of pixel translation occurring in the current projection screen, [ X ]0,Y0]Coordinates characterizing vertices of the projection screen.
As one approach, it can be based on the formula [ X, Y [ ]]＝M*[X0,Y0]+ V calculates the offset direction and amount of the second coordinate relative to the first coordinate, illustratively, at the time coordinate [ X ] is acquired0,Y0]And [ X, Y]May be according to the formula V ═ 1,1,1,1]′*[δX,δy]Firstly, the translation amount (i.e. the amount of pixel translation occurring in the current projection picture) V is calculated, and then according to V and the formula [ X, Y ]]＝M*[X0,Y0]+ V calculates the scaling factor M, where [ δ [ ]X,δy]And representing the variation of the offset of the current projection picture relative to the initial projection picture in the x and y directions. Alternatively, the offset direction of the second coordinate with respect to the first coordinate may be determined based on the scaling factor, and the offset amount of the second coordinate with respect to the first coordinate may be determined based on the translation amount.
Alternatively, the obtained shift direction and shift amount may be used as a shift parameter corresponding to the pixel shift, so that the projection position may be adjusted based on the shift parameter.
Step S250: and adjusting the optical axis for projecting the display image according to the offset parameter so as to enable the real-time projection position to approach the target projection position.
As one mode, the lens of the projection lens may be translated according to the offset parameter to adjust the optical axis of the projected display image, that is, the projection position may be adjusted in a manner of translating the lens of the projection lens based on the offset parameter, specifically, one lens of the projection lens may be translated. For example, in a specific application scenario, please refer to fig. 11, which illustrates an example of adjusting an optical axis of a projected display image based on a shift parameter, as shown in fig. 11, the projection lens 23 includes a lens 231, a lens 232, and a lens 233, and optionally, the lens 232 may be adjusted according to a direction of an arrow (which may be horizontal left and horizontal right) shown in fig. 11 based on the shift parameter, in this way, a central axis of a projected image of the projected image may be deflected, so that the image of the projected image may be moved as a whole, thereby achieving adjustment of a shift of a pixel at a projected position. Alternatively, the projected image on the projection screen may be shifted by 1-2 pixels when the lens is shifted by a few microns. The optical axis of the projection display image is adjusted in a mode of translating the lens of the projection lens, so that the real-time projection position approaches the target projection position infinitely, and further the pixel offset is reduced.
As shown in fig. 12, the coil a and the coil B may be connected to the same circuit, the coil C and the coil D may be connected to the same circuit, when a current passes through the circuit, a magnetic field generated by the coil interacts with a permanent magnet near the coil to push the coil to move, the coil is fixed to the positioning device of the lens 23, and the movement of the coil may push the lens to move, so that a certain lens in the projection lens may be translated in this way.
As another embodiment, as shown in fig. 13, a parallel plate having a certain included angle θ with the optical axis may be added on the imaging optical path in the projection process, so that the optical axis generates a certain offset, and the entire translation of the projection image pixels is realized by rotating the angle of the parallel plate.
The present embodiment is described below by way of example:
optionally, in this embodiment, a visible light camera may be used to collect the projection picture. Assuming that the pixel resolution of a display chip DMD of a projection device is 1920 x 1080, the pixel size is 5.4um, and the projection ratio range of a zoom lens of a projector is 1.2-2.0: 1, a collection camera can be selected according to the following criteria: (1) the FOV of the lens of the camera needs to be larger than the corresponding FOV at a projection ratio of 1.2: 1, i.e. half angle
(2) The pixel resolution of the camera is not less than 1920 x 1080, and the pixel size of the camera is not more than
Wherein, a Voice Coil Motor (VCM) can be used as an actuator to drive one lens in the lens to adjust the whole translation of the picture, and the whole translation of the picture is moved along the optical axisThe lens is moved to adjust the zooming of the picture.
According to the projection method, under the condition that the real-time projection position corresponding to the reference image projected by the second light source at the preset time interval is different from the target projection position, the offset direction and the offset corresponding to pixel offset are obtained according to the projected target test pattern, the optical axis of the projection display image is adjusted based on the offset direction and the offset, the projection effect is adjusted in the process of not influencing image projection, and the problem of projection image quality reduction caused by pixel offset is solved.
Referring to fig. 14, another embodiment of the present application provides a projection method applied to a projection system, the method including:
step S310: a display image is projected by a first light source and a reference image is projected by a second light source at preset time intervals.
Step S320: and acquiring a real-time projection position corresponding to the reference image.
Step S330: and judging whether the real-time projection position is different from the target projection position.
Step S340: and acquiring the resolution level corresponding to the target test pattern.
Optionally, in order to ensure the precision of the adjusted projection image, the pixels of the test pattern in this embodiment may correspond to multiple densities, and as a manner, resolution levels corresponding to different densities may be set and stored, for example, the resolution level corresponding to the denser pixels may be set to be lower, or the resolution level corresponding to the denser pixels may be set to be higher according to an actual situation, and the like, which is not specifically limited, in this case, after the target test pattern is obtained, the resolution level corresponding to the target test pattern may be obtained, so that the adjustment degree of the screen may be determined according to the resolution level.
Step S350: and acquiring an adjusting parameter matched with the resolution level.
For example, if the content of the target test pattern is a stripe, and the currently acquired resolution level is the lowest resolution level, in this way, the stripe is dense, there is a screen out-of-focus, and the vertex position of the target test pattern may not be accurately detected, optionally, a projection screen may be roughly adjusted (for example, a test pattern with a larger projection width or a higher projection precision may be selected to adjust the projection screen), and then an adjustment amount corresponding to the rough adjustment may be used as an adjustment parameter matched with the current resolution level. Optionally, after the coarse adjustment, a test pattern with a smaller projection width or a test pattern with a smaller projection precision may be continuously selected to perform a fine adjustment on the projection screen, and optionally, the adjustment process from the coarse adjustment to the fine adjustment may be periodically performed according to the actual situation.
Optionally, in this embodiment, the adjustment of the precision of the projection image by different degrees of adjustment modes may be precision adjustment for the entire region of the projection image, or precision adjustment for a partial region of the projection image, for example, if the projection content in the projection image is located at a corner of the projection screen, then the precision of the projection image at the corner may be adjusted only.
Step S360: and taking the adjusting parameter as an offset parameter corresponding to the difference.
As one mode, the above adjustment parameter may be used as an offset parameter corresponding to the pixel offset.
Step S370: and adjusting the optical axis for projecting the display image according to the offset parameter so as to enable the real-time projection position to approach the target projection position.
According to the projection method, under the condition that the real-time projection position corresponding to the reference image projected by the second light source at the preset time interval is different from the target projection position, the step-by-step precision adjustment of the optical axis of the projection display image is carried out based on the acquired offset parameter, so that the projection effect can be adjusted in the process of image projection without being influenced, and the problem of projection image quality reduction caused by pixel offset is solved.
Referring to fig. 15, another embodiment of the present application provides a projection method applied to a projection system, the method including:
step S410: a display image is projected by a first light source and a reference image is projected by a second light source at preset time intervals.
Step S420: and acquiring a real-time projection position corresponding to the reference image.
Step S430: and judging whether the real-time projection position is different from the target projection position.
Step S440: and acquiring the identification pattern content of the target test pattern.
Optionally, the change of the projection lens may cause a change in different directions or different mirror images to the projected image, so as to affect the projection effect of the projected image or the quality of the projected image, and as a way of improving the problem, in this embodiment, the second light source may project target test patterns with different pattern contents at preset time intervals, so as to implement precision adjustment on the projected image in each position direction.
In this embodiment, if the projection screen is taken as the whole projection area (as shown in fig. 10), the target test patterns with different pattern contents can be alternately projected on the projection screen; if the projection screen is divided into a plurality of areas, the target test patterns with different pattern contents can be projected in different areas, for example, as shown in fig. 16, the projection screen includes an area a, an area B, an area C, and an area D, where the pattern content of the target test pattern corresponding to the area a is vertical stripes, the pattern content of the target test pattern corresponding to the area B is horizontal stripes, the pattern content of the target test pattern corresponding to the area C is squares, and the pattern content of the target test pattern corresponding to the area D is mosaic-style squares, and by setting the pattern contents of the target test patterns corresponding to the area a, the area B, the area C, and the area D to be different, the accuracy adjustment of the projection image in each position direction by different target test patterns can be realized, that is, the fine adjustment is realized step by step.
As one way, after the target test pattern is acquired, the pattern content of the target test pattern may be acquired so that the adjustment accuracy of the projection image may be determined according to the pattern content.
Optionally, in a manner of dividing the projection screen into a plurality of regions, when the projection image is adjusted by using the target test patterns with different pattern contents, the calculated amount may be increased to a certain extent, and the projection effect is further affected. As a way to improve this problem, as shown in fig. 17, an image mask with a certain tolerance may be superimposed on the projection image based on that shown in fig. 16, so that data calculation of the area where the mask is located may be omitted in the calculation process, thereby reducing the calculation amount of image processing and further improving the projection effect. The specific position and the superimposition area of the mask plate superimposed on the projection image may not be limited.
Step S450: and acquiring an adjusting direction corresponding to the content of the identification pattern.
Optionally, the adjustment directions corresponding to different pattern contents may be different, and it may also be understood that the precision adjustment directions corresponding to different pattern contents may be different, and different pattern contents and corresponding adjustment directions may be preconfigured and stored in a mapping relationship. For example, in the above example, the pattern content of the target test pattern in the area where the vertex a is located is a vertical stripe, the corresponding adjustment direction is the lateral precision direction, the pattern content of the target test pattern in the area where the vertex B is located is a horizontal stripe, and the corresponding adjustment direction is the vertical precision direction. In this way, an adjustment direction corresponding to the pattern content of the current target test pattern may be obtained.
Step S460: the adjustment direction is taken as an offset parameter corresponding to the difference.
Step S470: and adjusting the optical axis for projecting the display image according to the offset parameter so as to enable the real-time projection position to approach the target projection position.
According to the projection method, under the condition that the real-time projection position corresponding to the reference image projected by the second light source at the preset time interval is different from the target projection position, the step-by-step precision adjustment of the optical axis of the projection display image is carried out based on the acquired offset parameter, so that the projection effect is adjusted in the process of not influencing the image projection, and the problem of projection image quality reduction caused by pixel offset is solved. The projection position is adjusted in different directions through the patterns with different contents, and the image precision after adjustment can be improved.
Referring to fig. 18, another embodiment of the present application provides a projection method, which may be applied to a projection system, and a difference between this embodiment and the foregoing embodiment is that this embodiment is suitable for a scenario where multiple projectors need to be spliced for pixel offset compensation, and implementation processes and implementation principles of other steps in this embodiment may refer to relevant descriptions in the foregoing embodiment, which are not described herein again, and the method includes:
step S510: a display image is projected by a first light source and a reference image is projected by a second light source at preset time intervals.
Alternatively, the display image and the reference image in this embodiment have different projection optical axes.
Step S520: and acquiring a real-time projection position corresponding to the reference image.
Optionally, the projection system in this embodiment may further include a projection device, and the target projection position may be a position after the projection device is thermally stabilized or a designated position on the projection surface. As an implementation manner, the designated position may be a fixed position on the projection screen, for example, the fixed position on the projection screen may be determined by placing a fixed infrared scattering point on the projection screen. Alternatively, as shown in fig. 19, if the projection apparatus is a plurality of projectors, one projector may be identified as the main projector, and the pixel shift thereof is not automatically compensated, which is designated as P0; identifying a projector spliced with the main projector as a secondary projector with the number of P1, wherein the pixel offset can be automatically compensated according to the projection picture of the P0 of the previous projector spliced with the secondary projector, and the reference position point of the projector can be selected to be in a fusion area with P0; similarly, another projector spliced with the projector P1 can be identified as a secondary projector, which is numbered P2, and the pixel offset can be automatically compensated according to the projection picture of the previous projector P1 spliced with the secondary projector, and then the reference position point of the projector can be selected to be in the fusion area with the projector P1, and so on, the fusion of multiple projectors can be realized.
Step S530: and judging whether the real-time projection position is different from the target projection position.
Step S540: and if so, adjusting the optical axis for projecting the display image so as to enable the real-time projection position to be adaptive to the target projection position.
As one way, if it is determined that the real-time projection position is different from the target projection position, the optical axis of the projection display image may be adjusted so that the real-time projection position may be adapted to the target projection position, which may be understood as the real-time projection position may approach the target projection position to a preset relative position, which may be understood as the position where the fusion region is located as shown in fig. 19.
According to the projection method, under the condition that the real-time projection position corresponding to the reference image projected by the second light source at the preset time interval is different from the target projection position, the step-by-step precision adjustment of the optical axis of the projection display image is carried out based on the acquired offset parameter, so that the projection effect is adjusted in the process of not influencing the image projection, and the problem of projection image quality reduction caused by pixel offset is solved. When a plurality of projectors are spliced and fused, pixel offset compensation is performed on one adjacent projector behind according to the mode of performing automatic compensation on the projection picture of the spliced previous projector P1, so that the accuracy of pixel offset compensation can be improved.
A projection apparatus provided by the present application will be described with reference to fig. 20.
Referring to fig. 20, based on the projection method, another projection apparatus 100 capable of performing the projection method is provided in the embodiment of the present application. The projection device 100 comprises one or more processors 102 (only one is shown in the figure), a memory 104, a picture acquisition module 11, a pixel shift detection module 12, and an adjustment module 13 for adjusting the pixel shift of the projected picture, which are coupled to each other. The memory 104 stores programs that can execute the content of the foregoing embodiments, and the processor 102 can execute the programs stored in the memory 104.
The Memory 104 may include a Random Access Memory (RAM) or a Read-Only Memory (Read-Only Memory). The memory 104 may be used to store instructions, programs, code sets, or instruction sets. The memory 104 may include a program storage area and a data storage area, wherein the program storage area may store instructions for implementing an operating system, instructions for implementing at least one function (such as a video image projection and playback function, etc.), instructions for implementing the various method embodiments described above, and the like. The storage data area may also store data created during use of projection device 100 (e.g., audio-visual data, chat log data), and the like.
The picture collecting module 11 is configured to obtain a real-time projection position corresponding to the reference image. Optionally, the image acquisition module in this embodiment may be a module inside the projection device, or may be a device having external communication with the projection device.
The pixel shift detection module 12 is used for determining whether there is a difference between the real-time projection position and the target projection position. The adjusting module 13 is configured to determine that there is a pixel shift if it is determined that the real-time projection position is different from the target projection position, and adjust an optical axis of the projection display image so that the real-time projection position approaches the target projection position, so that the adjusted real-time projection position is the same as the target projection position, or the adjusted real-time projection position approaches the target projection position infinitely.
Referring to fig. 21, a block diagram of a computer-readable storage medium according to an embodiment of the present application is shown. The computer-readable medium 600 has stored therein a program code that can be called by a processor to execute the method described in the above-described method embodiments.
The computer-readable storage medium 600 may be an electronic memory such as a flash memory, an EEPROM (electrically erasable programmable read only memory), an EPROM, a hard disk, or a ROM. Alternatively, the computer-readable storage medium 600 includes a non-volatile computer-readable storage medium. The computer readable storage medium 600 has storage space for program code 610 for performing any of the method steps of the method described above. The program code can be read from or written to one or more computer program products. The program code 610 may be compressed, for example, in a suitable form.
To sum up, the projection method, the projection apparatus and the storage medium provided by the present application project a display image through a first light source, and project a reference image at a preset time interval through a second light source, wherein the display image and the reference image have the same projection optical axis, then obtain a real-time projection position corresponding to the reference image, and then judge whether the real-time projection position is different from a target projection position, if so, adjust the optical axis projecting the display image, so that the real-time projection position approaches to the target projection position, thereby realizing that the real-time projection position approaches to the target projection position by adjusting the optical axis projecting the display image under the condition that the real-time projection position corresponding to the reference image projected at the preset time interval by the second light source is different from the target projection position, therefore, the projection effect can be adjusted in the process of not influencing the projection of the display image, and the problem of the reduction of the quality of the projection image caused by pixel offset is solved.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit the same; although the present application has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not necessarily depart from the spirit and scope of the corresponding technical solutions in the embodiments of the present application.
Claims (16)
1. A projection method, applied to a projection system, the method comprising:
projecting a display image by a first light source and a reference image by a second light source at preset time intervals, the display image and the reference image having the same projection optical axis;
acquiring a real-time projection position corresponding to the reference image;
judging whether the real-time projection position is different from the target projection position or not;
and if so, adjusting the optical axis for projecting the display image so as to enable the real-time projection position to approach the target projection position.
2. The method of claim 1, wherein the reference image is a target test pattern, and wherein adjusting the optical axis from which the display image is projected comprises:
acquiring an offset parameter corresponding to the difference according to the target test pattern;
and adjusting an optical axis for projecting the display image according to the offset parameter.
3. The method of claim 2, wherein said adjusting an optical axis on which the display image is projected according to the offset parameter comprises:
and translating the lens of the projection lens according to the offset parameter so as to adjust the optical axis for projecting the display image.
4. The method of claim 2, wherein said obtaining an offset parameter corresponding to the difference from the target test pattern comprises:
acquiring a first coordinate corresponding to the target projection position;
acquiring a second coordinate corresponding to the real-time projection position based on the target test pattern;
and acquiring the offset direction and the offset of the second coordinate relative to the first coordinate based on a specified rule.
5. The method of claim 2, wherein said obtaining an offset parameter corresponding to the difference from the target test pattern comprises:
acquiring a resolution level corresponding to the target test pattern;
acquiring an adjusting parameter matched with the resolution level;
and taking the adjusting parameter as an offset parameter corresponding to the difference.
6. The method of claim 2, wherein said obtaining an offset parameter corresponding to the difference from the target test pattern comprises:
acquiring the identification pattern content of the target test pattern;
acquiring an adjusting direction corresponding to the content of the identification pattern;
the adjustment direction is taken as an offset parameter corresponding to the difference.
7. The method of claim 1, wherein the projection system comprises a color wheel, and the preset time interval is a time interval when the color wheel rotates to a spoke region periodically.
8. The method of claim 7, wherein the projection system further comprises a projection device, and wherein the target projection location comprises a location after the projection device is thermally stabilized or is a specified location on a projection surface.
9. The method of claim 8, wherein the projection system further comprises a picture-capturing module, and a projection ratio of a corresponding lens of the picture-capturing module and a projection ratio of a projection lens of the projection device in a zoom state satisfy the following formula:
the field angle of the lens corresponding to the picture acquisition module and the field angle of the projection lens of the projection device in the zooming state meet the formula:
wherein, the TR iscameraCharacterizing a throw ratio of a lens corresponding to the image acquisition module, the
Characterizing a maximum throw ratio of a projection lens of the projection device in a zoom state, the FOVcameraCharacterizing the field angle of the corresponding lens of the image acquisition module, the
Characterizing a projection lens of the projection device in a zoom stateThe maximum field angle.
10. The method of claim 9, wherein the image resolution of the image captured by the image capture module is capable of resolving a single pixel of the imaged image when the projection lens of the projection device is in the minimum field angle state, and the angular resolution of the corresponding lens of the image capture module satisfies the following formula:
wherein, the
And characterizing the minimum field angle of the projection lens of the projection device in a zooming state, wherein N represents the number of pixels of one side containing a large number of pixels.
11. The method of claim 9, wherein the pixel resolution of the lens corresponding to the image capture module is greater than the pixel resolution of the projection lens of the projection device.
12. The method of any one of claims 1-11, wherein the first light source and the second light source are the same light source or different light sources.
13. The method of claim 12, wherein the first light source emits visible light and the second light source emits infrared light.
14. A projection method, wherein the method is applied to a projection system, and wherein the method comprises:
projecting a display image by a first light source and a reference image by a second light source at preset time intervals, the display image and the reference image having different projection optical axes;
acquiring a real-time projection position corresponding to the reference image;
judging whether the real-time projection position is different from the target projection position or not;
and if so, adjusting the optical axis for projecting the display image so as to enable the real-time projection position to be adaptive to the target projection position.
15. A projection device is characterized by comprising a picture acquisition module, a position difference detection module, an adjustment module, one or more processors and a memory;
one or more programs stored in the memory and configured to be executed by the one or more processors, the one or more programs configured to perform the method of any of claims 1-13 or 14.
16. A computer-readable storage medium, having program code stored therein, wherein the program code when executed by a processor performs the method of any of claims 1-13 or 14.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010693788.4A CN113949852A (en) | 2020-07-17 | 2020-07-17 | Projection method, projection apparatus, and storage medium |
| PCT/CN2021/106669 WO2022012651A1 (en) | 2020-07-17 | 2021-07-16 | Projection method, projection device and storage medium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010693788.4A CN113949852A (en) | 2020-07-17 | 2020-07-17 | Projection method, projection apparatus, and storage medium |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113949852A true CN113949852A (en) | 2022-01-18 |
Family
ID=79327236
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010693788.4A Pending CN113949852A (en) | 2020-07-17 | 2020-07-17 | Projection method, projection apparatus, and storage medium |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN113949852A (en) |
| WO (1) | WO2022012651A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115086626A (en) * | 2022-05-23 | 2022-09-20 | 广州达蒙安防科技有限公司 | Projection pen, projection method and storage medium |
| CN115736842A (en) * | 2022-12-15 | 2023-03-07 | 陕西中科创孚医疗科技有限责任公司 | Near-infrared fluorescence target positioning device, positioning method and calibration method |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116160239B (en) * | 2023-01-04 | 2024-09-03 | 歌尔股份有限公司 | Method, device, system and storage medium for assembling camera shooting product |
| CN118233610B (en) * | 2024-05-23 | 2024-08-30 | 成都赛力斯科技有限公司 | Focusing method and device of pixel headlight, electronic equipment and storage medium |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006350452A (en) * | 2005-06-13 | 2006-12-28 | Olympus Corp | Photographing display device and calibration data calculation method therefor |
| WO2010146974A1 (en) * | 2009-06-19 | 2010-12-23 | 株式会社日立製作所 | Optical scanning image display device |
| JP2013243515A (en) * | 2012-05-21 | 2013-12-05 | Sony Corp | Image adjustment device, image adjustment system, and image adjustment method |
| CN103220482B (en) * | 2013-03-12 | 2016-07-27 | 广东威创视讯科技股份有限公司 | A kind of full degree of freedom adjusts the method for projected picture position and size |
| JP6716864B2 (en) * | 2015-06-19 | 2020-07-01 | ソニー株式会社 | Projection apparatus and projection method, projection module, electronic device, and program |
| CN105657389B (en) * | 2016-03-22 | 2018-05-18 | 耿得力 | A kind of optical projection device and its calibration method |
| CN110636274A (en) * | 2019-11-11 | 2019-12-31 | 成都极米科技股份有限公司 | Ultrashort-focus picture screen alignment method and device, ultrashort-focus projector and storage medium |
-
2020
- 2020-07-17 CN CN202010693788.4A patent/CN113949852A/en active Pending
-
2021
- 2021-07-16 WO PCT/CN2021/106669 patent/WO2022012651A1/en active Application Filing
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115086626A (en) * | 2022-05-23 | 2022-09-20 | 广州达蒙安防科技有限公司 | Projection pen, projection method and storage medium |
| CN115736842A (en) * | 2022-12-15 | 2023-03-07 | 陕西中科创孚医疗科技有限责任公司 | Near-infrared fluorescence target positioning device, positioning method and calibration method |
| CN115736842B (en) * | 2022-12-15 | 2023-11-03 | 西安长空医疗科技服务有限公司 | Near infrared fluorescent target positioning device, positioning method and calibration method |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2022012651A1 (en) | 2022-01-20 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN114205570B (en) | Projection equipment and display control method for automatically correcting projection image | |
| CN113949852A (en) | Projection method, projection apparatus, and storage medium | |
| JP3925521B2 (en) | Keystone correction using part of the screen edge | |
| JP4424314B2 (en) | Document photographing apparatus, document still image detecting method and program | |
| CN102365866B (en) | Multiprojection display system and screen forming method | |
| US9794537B2 (en) | Image processing method and image projection device | |
| US9521383B2 (en) | Image processing apparatus, projector, and image processing method | |
| US10129471B2 (en) | Method, apparatus and system for detecting location of laser point on screen | |
| WO2011102299A1 (en) | Control device and projection-type image display device | |
| CN104658462B (en) | The control method of projector and projector | |
| US11611731B2 (en) | Evaluation method for image projection system, image projection system, and image projection control apparatus | |
| CN112272292A (en) | Projection correction method, apparatus and storage medium | |
| US20110279738A1 (en) | Control device and projection video display device | |
| CN116320335A (en) | Projection equipment and method for adjusting projection picture size | |
| US8031271B2 (en) | Calibrating a projection system | |
| CN115002432B (en) | Projection equipment and obstacle avoidance projection method | |
| JP2012078658A (en) | Projection type video display device | |
| JP2015043556A (en) | Information processor, image projection system and program | |
| CN116055696A (en) | Projection equipment and projection method | |
| JP2012181264A (en) | Projection device, projection method, and program | |
| JP2009181323A (en) | Signal processor and projection video display | |
| KR100917615B1 (en) | Method and apparatus for detecting location of laser beam with minimized error using mono-camera | |
| CN115802016A (en) | Lens adjusting method and device of projection optical machine and electronic equipment | |
| US11350067B2 (en) | Evaluation method for image projection system, image projection system, and image projection control apparatus | |
| JP2012220709A (en) | Projection type image display apparatus and control method for the same |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |