CN109040728A - A kind of ultrashort out-of-focus projection's device and method thereof with dual camera keystone - Google Patents
A kind of ultrashort out-of-focus projection's device and method thereof with dual camera keystone Download PDFInfo
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- CN109040728A CN109040728A CN201811297705.9A CN201811297705A CN109040728A CN 109040728 A CN109040728 A CN 109040728A CN 201811297705 A CN201811297705 A CN 201811297705A CN 109040728 A CN109040728 A CN 109040728A
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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
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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]
- H04N9/3141—Constructional details thereof
- H04N9/317—Convergence or focusing systems
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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]
- H04N9/3141—Constructional details thereof
- H04N9/3173—Constructional details thereof wherein the projection device is specially adapted for enhanced portability
- H04N9/3176—Constructional details thereof wherein the projection device is specially adapted for enhanced portability wherein the projection device is incorporated in a camera
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- Engineering & Computer Science (AREA)
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- Signal Processing (AREA)
- Projection Apparatus (AREA)
- Transforming Electric Information Into Light Information (AREA)
Abstract
Ultrashort out-of-focus projection's equipment with dual camera keystone that the invention discloses a kind of, it is characterized in that, including MCU module, camera module, image processing unit module, ultrashort out-of-focus projection's instrument and projection screen, the MCU module is electrically connected with the camera module and described image processing unit module respectively, the camera module is provided with two groups, and camera module described in two groups is fixedly mounted on the projector.Ultrashort out-of-focus projection's method with dual camera keystone that the present invention also provides a kind of.Present invention mainly solves current ultrashort out-of-focus projection's equipment to support vertical trapezium mostly, and it needs to manually adjust, the function of correction cannot be automatically performed, the present invention makes user using in ultrashort out-of-focus projection's device procedures, when user accidentally moves ultrashort out-of-focus projection's instrument, when trapezoidal distortion occurs in picture, ultra short focal projector can be with automatic adjustable level and vertical direction trapezoidal distortion.
Description
Technical field
The present invention relates to projection industry technology field, specially a kind of ultrashort out-of-focus projections with dual camera keystone
Equipment.Ultrashort out-of-focus projection's method with dual camera keystone that the invention further relates to a kind of simultaneously
Background technique
In the routine use of projector, the position of projector will just can guarantee projection at right angle with projection screen as far as possible
Effect, if not can guarantee the vertical of the two, picture will generate trapezoidal.In this case, user needs using " trapezoidal school
Orthofunction " is trapezoidal to correct, and guarantees picture at the rectangle of standard.
Keystone usually has two kinds of methods: optics keystone and digital keystone, optics keystone refers to logical
The physical location of adjustment camera lens is crossed to achieve the purpose that adjustment is trapezoidal, another number keystone be by the method for software come
Realize keystone.
Current almost all of manufacturer of projector all uses digital keystone technology, and using digital keystone
Most projectors all support vertical keystone correction function, only a few projector support level trapezoid correction function.But
In practical application, other than needing vertical keystone correction, also usually encounter to generate because of the biasing of projector horizontal position
It is trapezoidal.
Horizontal keystone correction and vertical keystone correction belong to digital keystone, are carried out by software interpolation algorithm
Adjusting Shape and compensation.Horizontal keystone correction is solved since projector lens can not vertical and generation horizontal direction with screen
Image trapezoidal distortion, to allow projector that can also equally realize standard rectangular projected image in the side of screen.
Since projector lens focal length is different, the projector for being provided simultaneously with two-way keystone technology is common in long short focus and throws
Shadow machine, i.e., remote projection, and ultra short focal projector almost only has vertical keystone correction.
Summary of the invention
Ultrashort out-of-focus projection's device and method thereof with dual camera keystone that the purpose of the present invention is to provide a kind of,
To solve the problems mentioned in the above background technology.
To achieve the above object, the invention provides the following technical scheme: it is a kind of with the ultrashort of dual camera keystone
Out-of-focus projection's equipment, including MCU module, camera module, image processing unit module, ultrashort out-of-focus projection's instrument and projection screen, institute
It states MCU module to be electrically connected with the camera module and described image processing unit module respectively, the camera module is set
Two groups are equipped with, camera module described in two groups is fixedly mounted on the projector；
The camera module is for acquiring the image that ultrashort out-of-focus projection's instrument projects to the projection screen；
Described image processing unit module is used to carry out stretching to input signal image and scaling processing, while exporting processing
Image data afterwards；
The MCU module acquires described in ultrashort out-of-focus projection's instrument projects to for camera module described in receiving two groups
The image of projection screen is also used to store pair in the left side is long and the right is long comparison pixel data library and upper side length and lower side length
Than pixel data library, while for sending a signal to described image processing unit module.
Preferably, camera module described in two groups is in alignment with the projection screen, and camera module described in two groups divides
It is not installed on the opposite two sides of the projector, the camera module is at a distance from the projection screen less than 50 ㎝.
Preferably, the camera module is wide-angle camera mould group.
A kind of ultrashort out-of-focus projection's method with dual camera keystone, comprising the following steps:
S1, monitor that ultrashort out-of-focus projection's instrument left side is long and the right is long respectively using two groups of camera modules and upper side length and under
Changing rule between the variation of side length and image pixel points to obtain comparison pixel data library, then will compare pixel number
According to library storage into MCU module；
After S2, MCU are powered, MCU module controls two groups of ultrashort out-of-focus projection's instrument of camera modules acquisition and projects to projection screen
Image, and the image of acquisition is sent to MCU module；
S3, MCU module obtain horizontal direction or vertical by searching for comparison pixel data library, by the image measured in S2
Direction needs the four corner pixels point quantity of image corrected；
S4, MCU module will need the value adjusted to be sent to image processing unit module, and image processing unit module is to input
Signal pattern stretched, scaling processing, while the image data that exports that treated, and corresponding pixel is shunk in corner outstanding
Points, reach image rectangle effect, to realize automatic bidirectional keystone；
S5, when user in use because other factors cause the position of ultrashort out-of-focus projection's instrument and projection screen send out
Changing and when causing to occur trapezoidal, according to above step can fast automatic completion correct.
Preferably, it is acquired in the S1 and S2 when the left side is long and the right is long and uses two groups of camera modules, side length in acquisition
With when lower side length use one group of camera module.
Preferably, after the completion of automatically correcting in the S4, image processing unit module and two groups of camera modules stop
Work.
Compared with prior art, the beneficial effects of the present invention are: present invention mainly solves current ultrashort out-of-focus projection's equipment
Vertical trapezium is supported mostly, and needs to manually adjust, and does not have the function of being automatically performed correction, the present invention is using user
In ultrashort out-of-focus projection's device procedures, when user accidentally moves ultrashort out-of-focus projection's instrument, when trapezoidal distortion occurs in picture, ultrashort coke
Projection device can be with automatic adjustable level and vertical direction trapezoidal distortion.
Detailed description of the invention
Fig. 1 is logic diagram of the invention；
Fig. 2 is the location diagram of camera module and projection screen of the invention；
Fig. 3 is the working principle diagram of image processing unit module of the invention；
Fig. 4 is the relation schematic diagram of two groups of camera modules and projection screen of the invention；
Fig. 5 is the relation schematic diagram of No. 1 camera and projection screen of the invention；
Fig. 6 is the relation schematic diagram of No. 2 cameras and projection screen of the invention；
Fig. 7 is that projection screen of the invention horizontal trapezoidal schematic diagram occurs；
Fig. 8 is the relation schematic diagram of No. 1 camera and projection screen when projection screen of the invention occurs horizontal trapezoidal；
Fig. 9 is the relation schematic diagram of No. 2 cameras and projection screen when projection screen of the invention occurs horizontal trapezoidal；
Figure 10 is the relation schematic diagram of No. 1 camera and projection screen when the present invention closes No. 2 cameras；
Figure 11 is that projection screen of the invention the schematic diagram of vertical trapezium occurs.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, below in conjunction with specific embodiment and attached
Figure, the present invention will be described in further detail.It should be appreciated that specific embodiment described herein is only used to explain this hair
It is bright, it is not intended to limit the present invention.
Embodiment
The present invention provides a kind of ultrashort out-of-focus projection's equipment with dual camera keystone as shown in Figs. 1-3, packets
Include MCU module, camera module, image processing unit module, ultrashort out-of-focus projection's instrument and projection screen, the MCU module difference
It is electrically connected with the camera module and described image processing unit module, the camera module is provided with two groups, two groups
The camera module is fixedly mounted on the projector；
The camera module is for acquiring the image that ultrashort out-of-focus projection's instrument projects to the projection screen；
Described image processing unit module is used to carry out stretching to input signal image and scaling processing, while exporting processing
Image data afterwards；
The MCU module acquires described in ultrashort out-of-focus projection's instrument projects to for camera module described in receiving two groups
The image of projection screen is also used to store pair in the left side is long and the right is long comparison pixel data library and upper side length and lower side length
Than pixel data library, while for sending a signal to described image processing unit module.
Specifically, camera module described in two groups is in alignment with the projection screen, and camera module described in two groups point
It is not installed on the opposite two sides of the projector, the camera module is at a distance from the projection screen less than 50 ㎝.
Specifically, the camera module is wide-angle camera mould group.
A kind of ultrashort out-of-focus projection's method with dual camera keystone, comprising the following steps:
S1, ultrashort out-of-focus projection's instrument left side long L and the long R in the right and upper side length are monitored respectively using camera 1 and camera 2
Changing rule between the variation and image pixel points of lower side length, to obtain comparison pixel data library, then will compare picture
Plain database purchase is into MCU module；
Two groups of camera modules are separately mounted to the two sides of ultrashort out-of-focus projection's instrument, shoot the left and right view of projection screen respectively
Figure, as shown in figure 4, L and R are marked respectively, the left side is long and the right is long；
Since camera module installation is not placed in the middle, lead to screen captured by screen captured by camera 1 and camera 2 not
Together, for camera 1, the distance of corner c and corner d to camera will be less than corner a and corner b, be imaged according to object distance former
Reason, the long R in the right will be less than the long L in the left side in camera imaging, as shown in figure 5, similarly, such as Fig. 6 of picture captured by camera 2 institute
Show, i.e., when ultrashort out-of-focus projection's instrument is normally put, camera 1 assert the long L in the left side, and the long R- Δ R in the right is calibration value, and camera 2 is recognized
Determine the long L- Δ L in the left side, the long R in the right is calibration value；
After S2, MCU are powered, MCU module controls two groups of ultrashort out-of-focus projection's instrument of camera modules acquisition and projects to projection screen
Image, and the image of acquisition is sent to MCU module；
S3, as shown in fig. 7, ultrashort out-of-focus projection's instrument on the left of from screen distance be greater than right side off screen curtain with a distance from, human eye viewing,
That is the left wide right narrow trapezoidal phenomenon of level in figure will occur in L > R, projected picture, in the case of this, camera 1 and camera 2
Captured image will be as shown in FIG. 8 and 9, and the data analysis that camera 1 obtains show that the long L+ Δ L in the left side has more than full-length L
Δ L, and the right length is constant.The data analysis that camera 2 obtains, show that the long L in the left side has more Δ L than full-length L- Δ L, and right
Side length is constant.So MCU module, which calculates, determines that upper lower trapezoid occurs for image, and left image needs to adjust pixel, according to meter
It calculates length changes delta L and compares pixel data library, corner a needs to adjust pixel quantity Na downwards, and corner b needs to adjust upward pixel
Na and Nb are sent to image processing unit module by quantity Nb, MCU；
Same principle, is applied in vertical keystone correction, at this point, can start camera 1, closes camera 2.Ultrashort coke
When projector normally puts, as shown in Figure 10, by camera 1 calculate after obtain upper side length Lu- Δ Lu, lower side length Ld, at this time for
Normal data；
Ultrashort out-of-focus projection's instrument is tilted close to the side of projection screen, can from Figure 11 higher than the side far from projection screen
To find out, top is long at this time is greater than following long, shoots obtained data by camera, a length of Lu in top, following a length of Ld,
MCU module analyses and comparison pixel data library has obtained more than side length Δ Lu, and lower side length is constant, and vertical trapezium has occurred in image,
Pixel data library is compared according to computational length changes delta Lu, obtains pixel number Na and Nc that corner a and corner c needs to shrink,
Na and Nc are sent to image processing unit module；
S4, MCU module will need the value adjusted to be sent to image processing unit module, and image processing unit module is to input
Signal pattern stretched, scaling processing, while the image data that exports that treated, and corresponding pixel is shunk in corner outstanding
Points, reach image rectangle effect, to realize automatic bidirectional keystone；
S5, when user in use because other factors cause the position of ultrashort out-of-focus projection's instrument and projection screen send out
Changing and when causing to occur trapezoidal, according to above step can fast automatic completion correct.
Two groups of camera modules, side length in acquisition are used specifically, being acquired when the left side is long and the right is long in the S1 and S2
With when lower side length use one group of camera module.
Specifically, image processing unit module and two groups of camera modules stop after the completion of automatically correcting in the S4
Work.
In summary: present invention mainly solves current ultrashort out-of-focus projection's equipment to support vertical trapezium mostly, and needs
Manually adjust, it is not possible to be automatically performed the function of correction, the present invention makes user using in ultrashort out-of-focus projection's device procedures, when with
Family accidentally moves ultrashort out-of-focus projection's instrument, when there is trapezoidal distortion in picture, ultra short focal projector can with automatic adjustable level and
Vertical direction trapezoidal distortion.
The foregoing is only a preferred embodiment of the present invention, but scope of protection of the present invention is not limited thereto,
Anyone skilled in the art in the technical scope disclosed by the present invention, according to the technique and scheme of the present invention and its
Inventive concept is subject to equivalent substitution or change, should be covered by the protection scope of the present invention.
Claims (6)
1. a kind of ultrashort out-of-focus projection's equipment with dual camera keystone, which is characterized in that including MCU module, camera
Module, image processing unit module, ultrashort out-of-focus projection's instrument and projection screen, the MCU module respectively with the camera module
It is electrically connected with described image processing unit module, the camera module is provided with two groups, and camera module described in two groups is equal
It is fixedly mounted on the projector；
The camera module is for acquiring the image that ultrashort out-of-focus projection's instrument projects to the projection screen；
Described image processing unit module is used to carry out stretching to input signal image and scaling processing, while treated for output
Image data；
The MCU module acquires ultrashort out-of-focus projection's instrument for camera module described in two groups of reception and projects to the projection
The image of screen is also used to store the comparison picture in the left side is long and the right is long comparison pixel data library and upper side length and lower side length
Plain database, while for sending a signal to described image processing unit module.
2. a kind of ultrashort out-of-focus projection's method with dual camera keystone according to claim 1, it is characterised in that:
Camera module described in two groups is in alignment with the projection screen, and camera module described in two groups is respectively arranged in the projection
On the opposite two sides of instrument, the camera module is at a distance from the projection screen less than 50 ㎝.
3. a kind of ultrashort out-of-focus projection's method with dual camera keystone according to claim 1, it is characterised in that:
The camera module is wide-angle camera mould group.
4. a kind of ultrashort out-of-focus projection's method described in claim 1 with dual camera keystone, which is characterized in that including
Following steps:
S1, long ultrashort out-of-focus projection's instrument left side and the right length and upper side length and lower side length are monitored respectively using two groups of camera modules
Variation and image pixel points between changing rule, thus obtain comparison pixel data library, then will compare pixel data library
It stores in MCU module；
After S2, MCU are powered, MCU module controls two groups of camera modules and acquires the figure that ultrashort out-of-focus projection's instrument projects to projection screen
Picture, and the image of acquisition is sent to MCU module；
S3, MCU module obtain horizontal direction or vertical direction by the image measured in S2 by searching for comparison pixel data library
Four corner pixels point quantity of the image for needing to correct；
S4, MCU module will need the value adjusted to be sent to image processing unit module, and image processing unit module is to input signal
Image stretched, scaling processing, while the image data that exports that treated, and corresponding pixel is shunk in corner outstanding
Number, reaches image rectangle effect, to realize automatic bidirectional keystone；
S5, when user in use because other factors cause the position of ultrashort out-of-focus projection's instrument and projection screen to become
It, can fast automatic completion correction according to above step when changing and causing to occur trapezoidal.
5. a kind of ultrashort out-of-focus projection's method with dual camera keystone according to claim 4, it is characterised in that:
Acquired in the S1 and S2 when the left side is long and the right is long and use two groups of camera modules, in acquisition side length and when lower side length using one
Group camera module.
6. a kind of ultrashort out-of-focus projection's method with dual camera keystone according to claim 4, it is characterised in that:
After the completion of automatically correcting in the S4, image processing unit module and two groups of camera modules stop working.
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| CN201811297705.9A CN109040728B (en) | 2018-11-02 | 2018-11-02 | Ultra-short-focus projection equipment with double-camera trapezoidal correction and method thereof |
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| CN201811297705.9A CN109040728B (en) | 2018-11-02 | 2018-11-02 | Ultra-short-focus projection equipment with double-camera trapezoidal correction and method thereof |
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| CN110798670A (en) * | 2019-11-11 | 2020-02-14 | 成都极米科技股份有限公司 | Ultrashort-focus picture screen alignment method and device, ultrashort-focus projection equipment and medium |
| CN111586386A (en) * | 2020-06-01 | 2020-08-25 | 光峰光电(无锡)有限公司 | Ultra-short-focus projection method capable of automatically focusing and bidirectionally correcting trapezoid |
| CN112004072A (en) * | 2020-07-31 | 2020-11-27 | 海尔优家智能科技（北京）有限公司 | Projection image detection method and device |
| CN112505994A (en) * | 2020-12-11 | 2021-03-16 | 四川长虹电器股份有限公司 | Ultra-short focus projection system and automatic focusing method thereof |
| CN114845091A (en) * | 2021-02-01 | 2022-08-02 | 扬智科技股份有限公司 | Projection device and trapezoidal correction method thereof |
| EP3934243A4 (en) * | 2019-11-11 | 2022-12-07 | Chengdu Xgimi Technology Co., Ltd | Ultra-short-focus alignment method and apparatus for picture and screen, ultra-short-focus projector, and storage medium |
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| CN111586386A (en) * | 2020-06-01 | 2020-08-25 | 光峰光电(无锡)有限公司 | Ultra-short-focus projection method capable of automatically focusing and bidirectionally correcting trapezoid |
| CN112004072A (en) * | 2020-07-31 | 2020-11-27 | 海尔优家智能科技（北京）有限公司 | Projection image detection method and device |
| CN112505994A (en) * | 2020-12-11 | 2021-03-16 | 四川长虹电器股份有限公司 | Ultra-short focus projection system and automatic focusing method thereof |
| CN114845091A (en) * | 2021-02-01 | 2022-08-02 | 扬智科技股份有限公司 | Projection device and trapezoidal correction method thereof |
| CN114845091B (en) * | 2021-02-01 | 2023-11-10 | 扬智科技股份有限公司 | Projection device and trapezoid correction method thereof |
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| CN109040728B (en) | 2021-01-12 |
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