CN105301884A - Method and system for automatic focusing on multi-point reference image recognition - Google Patents
Method and system for automatic focusing on multi-point reference image recognition Download PDFInfo
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- CN105301884A CN105301884A CN201510779946.7A CN201510779946A CN105301884A CN 105301884 A CN105301884 A CN 105301884A CN 201510779946 A CN201510779946 A CN 201510779946A CN 105301884 A CN105301884 A CN 105301884A
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
- G03B21/14—Details
- G03B21/53—Means for automatic focusing, e.g. to compensate thermal effects
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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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Abstract
The invention relates to a method and system for automatic focusing on multi-point reference image recognition. The method comprises the following steps of S1, projecting a multi-point reference image distributed on different points on a predetermined projection surface; S2, driving a focusing lens assembly to convert a focusing state so as to adjust a focal length of projection; S3, acquiring image information of the multi-point reference image at different focal lengths; S4, obtaining focusing parameters of the clearest multi-point reference image according to the image information at different focal lengths; and S5, adjusting the focusing lens assembly to the corresponding focusing state according to the focusing parameters of the clearest multi-point reference image. According to the method and the system for automatic focusing on multi-point reference image recognition, disclosed by the invention, focusing is more accurate through multi-point focusing, the resolution of the image projected on the projection surface is uniform, and the image entirely looks more clearly.
Description
Technical field
The present invention relates to optical projection system, more particularly, relate to a kind of method and system of multiple spot being carried out to automatic focusing with reference to image recognition.
Background technology
Be currently applied to the technology of auto on projecting, there are telemetry and image analytical method two kinds, in image analytical method, mainly launch a focusing reference picture in projected picture central area, by analyzing the reference picture sharpness situation of launching, and complete automatic focusing process.
The method is adopted to have a condition precedent, that be exactly the imaging resolution of projection lens is required very high, whole projected picture all requires very clear, but due to the factor such as element precision and rigging error, when producing in batches, the resolution of projection lens is better than surrounding position in center, automatic focusing is carried out in this way so adopt, often cause projected picture center very clear, and corner is fuzzy, does not reach the effect of overall viewing.Thus need to adopt multipoint images analytical approach, avoid this situation to occur, make the image resolution ratio after automatic focusing relatively more even, whole structure is best.
Summary of the invention
The technical problem to be solved in the present invention is, provides a kind of method and system of multiple spot being carried out to automatic focusing with reference to image recognition.
The technical solution adopted for the present invention to solve the technical problems is: construct a kind of method of multiple spot being carried out to automatic focusing with reference to image recognition, comprise the following steps:
S1: launch the multiple spot reference image being distributed in difference on predetermined projecting plane;
S2: the focal length driving focusing lens component transform focus state adjustment projection;
S3: the image information obtaining described multiple spot reference image during different focal;
S4: according to image information during different focal draw described multiple spot with reference to image the most clear time focusing parameter;
S5: described focusing lens assembly is transferred to corresponding focus state by the focusing parameter time the most clear with reference to image according to described multiple spot.
Preferably, in described step S3:
When described focusing lens assembly adjusting focal length during Real-time Obtaining different focal described multiple spot with reference to the image information of image.
Preferably, described multiple spot comprises the combination of a kind of characteristics of image in word, grid, gridiron pattern or multiple characteristics of image with reference to image.
Preferably, described multiple spot is the general image being covered with described projecting plane with reference to image.
Preferably, described multiple spot is visible images and/or infrared light image with reference to image.
Preferably, described multiple spot comprises with reference to image the subimage that at least two are distributed in described projecting plane zones of different.
Preferably, described multiple spot comprises with reference to image the subimage that five are distributed in described projecting plane zones of different, and wherein four rectangular distributions of subimage, another subimage is positioned at the subimage center of four rectangular distribution.
Preferably, described multiple spot comprises with reference to image the subimage that nine are distributed in described projecting plane zones of different, and the matrix arrangement mode in 3X3 is uniformly distributed.
The present invention also constructs a kind of system of multiple spot being carried out to automatic focusing with reference to image recognition, comprising:
Projection module, for launching the multiple spot reference image being distributed in difference on predetermined projecting plane;
First driver module, for the focal length driving focusing lens component transform focus state to adjust projection, to convert the sharpness of described multiple spot with reference to figure;
Monitoring module, during for obtaining different focal, described multiple spot is with reference to the image information of image;
Optimal parameter acquisition module, for drawing focusing parameter when described multiple spot is the most clear with reference to image according to described image information during different focal;
Second driver module, is transferred to corresponding focus state according to the focusing parameter time the most clear by described focusing lens assembly.
Preferably, during described monitoring module Real-time Obtaining different focal described multiple spot with reference to the image information of image.
Preferably, described multiple spot comprises the combination of a kind of characteristics of image in word, grid, gridiron pattern or multiple characteristics of image with reference to image; Or,
Described multiple spot comprises with reference to image the subimage that at least two are distributed in described projecting plane zones of different; Or,
Described multiple spot is the general image being covered with described projecting plane with reference to image; Or,
Described multiple spot is visible images and/or infrared light image with reference to image.
Implement method and system of multiple spot being carried out to automatic focusing with reference to image recognition of the present invention, there is following beneficial effect: described focusing lens assembly is transferred to corresponding focus state by focusing parameter when method and system of carrying out automatic focusing with reference to image recognition to multiple spot of the present invention are the most clear with reference to image according to described multiple spot, pass through multi-spot, make focusing more accurate, make image resolution ratio that projecting plane projects even, entirety seems more clear.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the invention will be further described, in accompanying drawing:
The schematic diagram of Fig. 1 when to be the multiple spot launched to projecting plane of the method for carrying out automatic focusing with reference to image recognition to multiple spot in the embodiment of the present invention comprise five subimages with reference to image;
The schematic diagram of Fig. 2 when to be the multiple spot launched to projecting plane of the method for carrying out automatic focusing with reference to image recognition to multiple spot in the embodiment of the present invention comprise nine subimages with reference to image;
The schematic diagram that Fig. 3 is multiple spot that the method for carrying out automatic focusing with reference to image recognition to multiple spot in the embodiment of the present invention is launched to projecting plane when being general image with reference to image;
Fig. 4 is the flow chart of steps of multiple spot being carried out to the method for automatic focusing with reference to image recognition in the embodiment of the present invention.
Embodiment
In order to there be understanding clearly to technical characteristic of the present invention, object and effect, now contrast accompanying drawing and describe the specific embodiment of the present invention in detail.
As shown in Figure 1, comprising the system that multiple spot carries out automatic focusing with reference to image recognition in a preferred embodiment of the invention: projection module, for launching the multiple spot reference image being distributed in difference on predetermined projecting plane S; First driver module, for the focal length driving focusing lens assembly 1 to convert focus state adjustment projection, to convert the sharpness of multiple spot with reference to figure; Monitoring module, during for obtaining different focal, multiple spot is with reference to the image information of image; Optimal parameter acquisition module, for drawing focusing parameter when multiple spot is the most clear with reference to image according to image information during different focal; Second driver module, is transferred to corresponding focus state according to the focusing parameter time the most clear by focusing lens assembly 1.Further, optimal parameter acquisition module judges index, algorithm can preset.The system that automatic focusing carries out with reference to image recognition to multiple spot by multiple spot with reference to image recognition to carry out automatic focusing, allow focussing process realize robotization, and focusing is more accurate.Preferably, during monitoring module Real-time Obtaining different focal, multiple spot is with reference to the image information of image, makes the result of focusing more accurate, and make image resolution ratio that projecting plane projects even, entirety seems more clear.
Focusing lens assembly 1 comprises focusing lens, and the first driver module, the second driver module control step motor or servo motor etc. drive focusing lens assembly 1 to move at projecting direction, to adjust the focal length of projection.Focusing lens assembly 1 also can comprise multiple focusing lens and be combined to form, and step motor or servo motor also can be used for drive part focusing lens and move at projecting direction, to adjust the focal length of projection.
In certain embodiments, multiple spot comprises the combination of a kind of characteristics of image in word, grid, gridiron pattern or multiple characteristics of image with reference to image.When multiple spot comprises a kind of characteristics of image with reference to image, the quantity of characteristics of image can be one, is presented at a region of projecting plane S, covers multiple points of projecting plane S; The quantity of characteristics of image also can be multiple, is distributed in the region that projecting plane S is different.When multiple spot comprises multiple characteristics of image with reference to image, multiple characteristics of image can be distributed in the zones of different of projecting plane S, and also can overlap is presented on the S of projecting plane.
In certain embodiments, multiple spot comprises the subimage A that at least two are distributed in described projecting plane S zones of different with reference to image, and subimage A can be one in word, grid, chessboard or combination, and the content of each subimage A can be identical with size, also can be different.Shown in composition graphs 1, multiple spot comprises with reference to image the subimage A that five are distributed in projecting plane S zones of different, and wherein four rectangular distributions of subimage A, another subimage A is positioned at the subimage A center of four rectangular distribution.Shown in composition graphs 2, in other embodiments, multiple spot comprises with reference to image the subimage A that nine are distributed in projecting plane S zones of different, and the matrix arrangement mode in 3X3 is uniformly distributed.
Shown in composition graphs 3, in other embodiments, multiple spot is the general image being covered with projecting plane S with reference to image, and overall figure can be grid, also can be chessboard or word, or multiple combination.
Monitoring module by monitoring camera 2 and for sense multiple spot with reference to image monitoring sensor sensing image after obtain image information.Multiple spot can be visible images with reference to image, corresponding, monitoring sensor comprises visible light sensor.Multiple spot also can be infrared light image with reference to image, corresponding, monitoring sensor comprises infrared light transducer[sensor.Multiple spot also can be the combination of visible images and infrared light image with reference to image, corresponding, monitoring sensor comprises the combination of visible light sensor and infrared light transducer[sensor.
As shown in Figure 4, further, above-mentioned multiple spot may be used in automatic focusing method with reference to image, comprises the following steps the method that multiple spot carries out automatic focusing with reference to image recognition:
S1: launch the multiple spot reference image being distributed in difference on predetermined projecting plane S;
S2: drive focusing lens assembly 1 to convert the focal length of focus state adjustment projection;
S3: during acquisition different focal, multiple spot is with reference to the image information of image;
S4: according to image information during different focal draw multiple spot with reference to image the most clear time focusing parameter;
S5: focusing lens assembly 1 is transferred to corresponding focus state by the focusing parameter time the most clear with reference to image according to multiple spot.Focusing lens assembly 1 is adjusted in the most clear state of projected image, completes automatic focusing, by multiple spot with reference to image, can allow to the sharpness of defocused picture various piece even.
Preferably, in order to make the image information of acquisition more comprehensive, in step S3:
When focusing lens assembly 1 adjusting focal length, during Real-time Obtaining different focal, multiple spot, with reference to the image information of image, makes the result of focusing more accurate.
Understandably, above-mentioned each technical characteristic can combination in any use and unrestricted.
The foregoing is only embodiments of the invention; not thereby the scope of the claims of the present invention is limited; every utilize instructions of the present invention and accompanying drawing content to do equivalent structure or equivalent flow process conversion; or be directly or indirectly used in other relevant technical fields, be all in like manner included in scope of patent protection of the present invention.
Claims (9)
1. multiple spot is carried out to a method for automatic focusing with reference to image recognition, it is characterized in that, comprise the following steps:
S1: launch the multiple spot reference image being distributed in difference on predetermined projecting plane (S);
S2: the focal length driving focusing lens assembly (1) conversion focus state adjustment projection;
S3: the image information obtaining described multiple spot reference image during different focal;
S4: according to image information during different focal draw described multiple spot with reference to image the most clear time focusing parameter;
S5: described focusing lens assembly (1) is transferred to corresponding focus state by the focusing parameter time the most clear with reference to image according to described multiple spot.
2. method of multiple spot being carried out to automatic focusing with reference to image recognition according to claim 1, is characterized in that, in described step S3:
When described focusing lens assembly (1) adjusting focal length during Real-time Obtaining different focal described multiple spot with reference to the image information of image.
3. according to claim 1 and 2ly carry out the method for automatic focusing to multiple spot with reference to image recognition, it is characterized in that, described multiple spot comprises the combination of a kind of characteristics of image in word, grid, gridiron pattern or multiple characteristics of image with reference to image; Or,
Described multiple spot is the general image being covered with described projecting plane (S) with reference to image; Or,
Described multiple spot is visible images and/or infrared light image with reference to image.
4. method of multiple spot being carried out to automatic focusing with reference to image recognition according to claim 1 and 2, is characterized in that, described multiple spot comprises with reference to image the subimage (A) that at least two are distributed in described projecting plane (S) zones of different.
5. method of multiple spot being carried out to automatic focusing with reference to image recognition according to claim 4, it is characterized in that, described multiple spot comprises with reference to image the subimage (A) that five are distributed in described projecting plane (S) zones of different, the wherein rectangular distribution of four subimages (A), another subimage (A) is positioned at subimage (A) center of four rectangular distribution.
6. method of multiple spot being carried out to automatic focusing with reference to image recognition according to claim 4, it is characterized in that, described multiple spot comprises with reference to image the subimage (A) that nine are distributed in described projecting plane (S) zones of different, and the matrix arrangement mode in 3X3 is uniformly distributed.
7. multiple spot is carried out to a system for automatic focusing with reference to image recognition, it is characterized in that, comprising:
Projection module, for launching the multiple spot reference image being distributed in difference on predetermined projecting plane (S);
First driver module, for the focal length driving focusing lens assembly (1) to convert focus state adjustment projection, to convert the sharpness of described multiple spot with reference to figure;
Monitoring module, during for obtaining different focal, described multiple spot is with reference to the image information of image;
Optimal parameter acquisition module, for drawing focusing parameter when described multiple spot is the most clear with reference to image according to described image information during different focal;
Second driver module, is transferred to corresponding focus state according to the focusing parameter time the most clear by described focusing lens assembly (1).
8. system of multiple spot being carried out to automatic focusing with reference to image recognition according to claim 7, is characterized in that, during described monitoring module Real-time Obtaining different focal, described multiple spot is with reference to the image information of image.
9. according to claim 7 or 8, carry out the system of automatic focusing to multiple spot with reference to image recognition, it is characterized in that, described multiple spot comprises the combination of a kind of characteristics of image in word, grid, gridiron pattern or multiple characteristics of image with reference to image; Or,
Described multiple spot comprises with reference to image the subimage (A) that at least two are distributed in described projecting plane (S) zones of different; Or,
Described multiple spot is the general image being covered with described projecting plane (S) with reference to image; Or,
Described multiple spot is visible images and/or infrared light image with reference to image.
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105933684A (en) * | 2016-04-19 | 2016-09-07 | 深圳市印象科技有限公司 | AF method with interactive function and projector |
| CN106488121A (en) * | 2016-09-29 | 2017-03-08 | 西安中科晶像光电科技有限公司 | A kind of method and system of the automatic focusing based on pattern match |
| WO2017079964A1 (en) * | 2015-11-13 | 2017-05-18 | 神画科技（深圳）有限公司 | Method and system for automatic focusing on multi-point reference image recognition |
| CN106961555A (en) * | 2017-04-20 | 2017-07-18 | 成都市极米科技有限公司 | Data processing method and device |
| CN108024101A (en) * | 2016-10-28 | 2018-05-11 | 中强光电股份有限公司 | Projector and its focalization method |
| WO2018214153A1 (en) * | 2017-05-26 | 2018-11-29 | 神画科技（深圳）有限公司 | Automated compensation system and method for heat-caused defocusing |
| CN110827289A (en) * | 2019-10-08 | 2020-02-21 | 歌尔股份有限公司 | Method and device for extracting target image in projector definition test |
| CN111064939A (en) * | 2018-10-16 | 2020-04-24 | 中强光电股份有限公司 | Projection system and trapezoidal correction method |
| CN111726512A (en) * | 2019-03-18 | 2020-09-29 | 浙江宇视科技有限公司 | Area focusing method, device, equipment and storage medium |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101470246A (en) * | 2007-12-27 | 2009-07-01 | 深圳富泰宏精密工业有限公司 | Automatic focusing system and method for projector |
| CN102354079A (en) * | 2011-09-23 | 2012-02-15 | 海信集团有限公司 | Projection device and automatic focusing method |
| TW201209508A (en) * | 2010-08-31 | 2012-03-01 | Hon Hai Prec Ind Co Ltd | Auto-focusing projector and method |
| CN102967991A (en) * | 2012-11-08 | 2013-03-13 | 广东欧珀移动通信有限公司 | Method, device, system and mobile terminal for adjusting projector focal length |
| CN203397073U (en) * | 2013-06-18 | 2014-01-15 | 中山市众盈光学有限公司 | Projector automatic focusing control device |
| WO2015131688A1 (en) * | 2014-10-09 | 2015-09-11 | 中兴通讯股份有限公司 | Method and apparatus for automatic projector focusing, and projector |
| WO2015170437A1 (en) * | 2014-05-07 | 2015-11-12 | Sony Corporation | Projection type image display device and control method of projection type image display device |
-
2015
- 2015-11-13 CN CN201510779946.7A patent/CN105301884A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101470246A (en) * | 2007-12-27 | 2009-07-01 | 深圳富泰宏精密工业有限公司 | Automatic focusing system and method for projector |
| TW201209508A (en) * | 2010-08-31 | 2012-03-01 | Hon Hai Prec Ind Co Ltd | Auto-focusing projector and method |
| CN102354079A (en) * | 2011-09-23 | 2012-02-15 | 海信集团有限公司 | Projection device and automatic focusing method |
| CN102967991A (en) * | 2012-11-08 | 2013-03-13 | 广东欧珀移动通信有限公司 | Method, device, system and mobile terminal for adjusting projector focal length |
| CN203397073U (en) * | 2013-06-18 | 2014-01-15 | 中山市众盈光学有限公司 | Projector automatic focusing control device |
| WO2015170437A1 (en) * | 2014-05-07 | 2015-11-12 | Sony Corporation | Projection type image display device and control method of projection type image display device |
| WO2015131688A1 (en) * | 2014-10-09 | 2015-09-11 | 中兴通讯股份有限公司 | Method and apparatus for automatic projector focusing, and projector |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017079964A1 (en) * | 2015-11-13 | 2017-05-18 | 神画科技（深圳）有限公司 | Method and system for automatic focusing on multi-point reference image recognition |
| CN105933684A (en) * | 2016-04-19 | 2016-09-07 | 深圳市印象科技有限公司 | AF method with interactive function and projector |
| CN106488121A (en) * | 2016-09-29 | 2017-03-08 | 西安中科晶像光电科技有限公司 | A kind of method and system of the automatic focusing based on pattern match |
| CN108024101A (en) * | 2016-10-28 | 2018-05-11 | 中强光电股份有限公司 | Projector and its focalization method |
| CN106961555A (en) * | 2017-04-20 | 2017-07-18 | 成都市极米科技有限公司 | Data processing method and device |
| CN106961555B (en) * | 2017-04-20 | 2019-11-05 | 成都极米科技股份有限公司 | Data processing method and device |
| WO2018214153A1 (en) * | 2017-05-26 | 2018-11-29 | 神画科技（深圳）有限公司 | Automated compensation system and method for heat-caused defocusing |
| CN111064939A (en) * | 2018-10-16 | 2020-04-24 | 中强光电股份有限公司 | Projection system and trapezoidal correction method |
| CN111726512A (en) * | 2019-03-18 | 2020-09-29 | 浙江宇视科技有限公司 | Area focusing method, device, equipment and storage medium |
| CN110827289A (en) * | 2019-10-08 | 2020-02-21 | 歌尔股份有限公司 | Method and device for extracting target image in projector definition test |
| CN110827289B (en) * | 2019-10-08 | 2022-06-14 | 歌尔光学科技有限公司 | Method and device for extracting target image in projector definition test |
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Application publication date: 20160203 |