CN102508578B - Projection positioning device and method as well as interaction system and method - Google Patents
Projection positioning device and method as well as interaction system and method Download PDFInfo
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- CN102508578B CN102508578B CN201110302639.1A CN201110302639A CN102508578B CN 102508578 B CN102508578 B CN 102508578B CN 201110302639 A CN201110302639 A CN 201110302639A CN 102508578 B CN102508578 B CN 102508578B
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- 238000000034 method Methods 0.000 title claims abstract description 47
- 230000003993 interaction Effects 0.000 title abstract description 13
- 230000008859 change Effects 0.000 claims abstract description 22
- 238000012545 processing Methods 0.000 claims abstract description 10
- 235000009508 confectionery Nutrition 0.000 claims description 35
- 230000002452 interceptive effect Effects 0.000 claims description 23
- 238000012876 topography Methods 0.000 claims description 16
- 230000003287 optical effect Effects 0.000 claims description 14
- 230000008569 process Effects 0.000 claims description 14
- 238000000691 measurement method Methods 0.000 claims description 12
- 238000005259 measurement Methods 0.000 claims description 9
- 238000012937 correction Methods 0.000 claims description 6
- 230000003044 adaptive effect Effects 0.000 claims description 4
- 201000009310 astigmatism Diseases 0.000 claims description 3
- 238000011088 calibration curve Methods 0.000 claims description 3
- 230000010363 phase shift Effects 0.000 claims description 3
- 238000009877 rendering Methods 0.000 claims description 3
- 238000004088 simulation Methods 0.000 claims description 3
- 238000009432 framing Methods 0.000 claims description 2
- 230000036544 posture Effects 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 238000003384 imaging method Methods 0.000 description 3
- 238000011160 research Methods 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 238000007654 immersion Methods 0.000 description 2
- 230000004807 localization Effects 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000036760 body temperature Effects 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
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- 238000007689 inspection Methods 0.000 description 1
- 238000003909 pattern recognition Methods 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 230000004044 response Effects 0.000 description 1
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/042—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by opto-electronic means
- G06F3/0425—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by opto-electronic means using a single imaging device like a video camera for tracking the absolute position of a single or a plurality of objects with respect to an imaged reference surface, e.g. video camera imaging a display or a projection screen, a table or a wall surface, on which a computer generated image is displayed or projected
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/0304—Detection arrangements using opto-electronic means
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- Projection Apparatus (AREA)
Abstract
The invention discloses a projection positioning device, comprising a projector, a camera and a processing device, wherein the projector is used for projecting regularly-set strip patterns on the surface of an object to be detected; the camera is used for shooting a modulated and deformed strip image according to the shape of the surface of the object to be detected; and the processing device is used for determining a space position and/or a position change of the object to be detected according to the deformed strip image. Furthermore, the invention discloses a corresponding projection positioning method, an interaction system and an interaction method. By projecting the strip patterns on the surface of the object to be detected and capturing and analyzing the deformed strip image modulated by the evenness of the surface of the object to be detected, the higher-precise position and the faster-speed real-time trace are carried out on the object to be detected, such as a human hand with complex three-dimensional postures, so that the accurate and smooth motion sensing or touch operation are realized.
Description
Technical field
The present invention relates to the technology of carrying out man-machine interaction, particularly relate to projection positioning device and method and based on the interactive system of projective iteration and method.
Background technology
Along with the develop rapidly of computer technology, people show more colourful content by multimedia equipment more and more widely, as sound, image, word and video.Accordingly, the projector equipment that can demonstrate large format picture have also been obtained increasingly extensive application and develops fast.But early stage optical projection system cannot realize the direct interactive operation between people and projection screen, significantly limit its range of application, as the occasion such as classroom instruction, Entertainment; People cannot be met and pursue more natural, to have more feeling of immersion man-machine interaction experience.
At present both at home and abroad more ripe interactive projection system builds based on electronic whiteboard mostly, mainly comprises the type of skills such as touch-screen type, infrared array formula, induction and laser scan type.Its advantage is that reliability of positioning and precision are higher, and tracking velocity is very fast; Shortcoming all needs to rely on special projection screen, cannot realize the interactive function on any projection plane, and install and use inconvenient, cost is higher.Another kind of interactive projection system then adopts special mutual pen device, as ultrasonic pen, infrared light electroprobe, optical mouse pen etc., coordinate special receiving sensor, accurately can locate pen tip position, realize writing and touch control operation on any projection plane.But user by interaction pen, must cannot realize free-hand interactive function when using this kind equipment, and this brings certain constraint to user, weakens the interactive experience of " nature ".
In recent years, the Gesture Recognition of view-based access control model image, as the important research direction in field of human-computer interaction, provides nature interactive mode intuitively, and interactive experience easily true to nature, becomes rapidly the focus of research.Current research work concentrates on hand-shaped characteristic extraction algorithm mostly, and based on pattern-recognition dynamically or static gesture recognizer, it is inherently two-dimensional process to images of gestures and parsing.And free-hand interactive function, then need the three-dimensional information to images of gestures, particularly the locus of finger tip and/or change in location carry out Measurement accuracy and real-time follow-up, such as free-hand touch-control, free-handly to write.For this problem, existing solution mainly based on the stereovision technique of one or more detector, to locate finger tip locus and/or change in location.But extract image three-dimensional information based on monocular or multi-view stereo vision principle, spatial positioning accuracy is limited, be difficult to realize meticulous " touch-control " operation.In addition, visual image information amount is large, and be easily disturbed, thus image processing algorithm is comparatively complicated, is difficult to realize real time location tracking, and especially for the situation of multi-point touch, calculated amount is multiplied especially.Therefore, the interaction technique of current view-based access control model image is also difficult to the real requirement meeting people's " accurate touch-control ".
Summary of the invention
One object of the present invention is exactly for the deficiencies in the prior art, a kind of projection positioning device and method are provided, can such as have a staff of complex three-dimensional gesture to testee to locate with carrying out degree of precision and fast speed ground real-time follow-up, thus realize precisely smooth body sense or touch control operation.
Another object of the present invention is to provide a kind of interactive system based on projective iteration and exchange method, can obtain accurately quick, natural and tripping man-machine interaction experience.
For achieving the above object, the present invention is by the following technical solutions:
A kind of projective iteration method, comprises the following steps:
A. will there is the stripe pattern projection of setting rule to testee surface;
B. the deforming stripe image modulated by testee surface configuration is absorbed;
C. according to locus and/or the change in location of described deforming stripe image determination testee.
Preferably, described method is used in projector in projection screen projected image process, and described candy strip is projecting to testee surface every a frame or the time slot between multiple image.
Preferably, the locus of described testee and/or change in location are that the data reconstruction obtaining object surface tri-dimensional profile by topography measurement algorithm is determined, described topography measurement algorithm is selected from Fourier transform topography measurement method FTP, phase shift topography measurement method PSP, modulation is measured in topography measurement method MMP, Spatial phase measurement method SPD one or more.
Preferably, described candy strip comprises: the striped spatially adapted with the different parts feature of testee combines, and/or the striped in the sequential adapted with the posture changing feature of testee combines.
Preferably, the factor of described setting rule comprises the shape of striped, thickness, spacing, gray scale, brightness, contrast and projecting direction.
Preferably, the shape of striped is that ring-type or linearity are wavy or latticed.
Preferably, described step c comprises: first implement coarse positioning substantially to lock testee region, more accurately locate it; And/or utilize fringe gray level information to carry out stripe subdividing process.
Preferably, described testee is staff, before step a, by setting up staff three-dimensional model, choose multi-form candy strip respectively and carry out simulation calculating, analyze the adaptive faculty of often kind of candy strip to different hand shape, gesture, hand position, the colour of skin and motor pattern, presetting can for the candy strip of projection.
Preferably, described candy strip is non-visible light candy strip, such as infrared ray candy strip.
Preferably, in step c, the locus of testee and/or the determination of change in location are through Error processing, and described Error processing comprises:
Originate for the physical location of testee and measuring position analytical error, set up error model;
The optical property factor of projection lens and pick-up lens of analyzing is on the impact of error, and/or analytic system whole geometry structure is on the impact of error, and described optical property factor at least comprises optical distortion and astigmatism;
By setting up error correction table or rendering error calibration curve carries out error correction and compensation.
Based on an exchange method for projective iteration, for carrying out alternately, comprising with the system providing image to show:
Show the step of image on a display screen;
According to the step of any one projective iteration method aforementioned relative to shown framing testee;
According to the step of positioning result to described system feedback control information.
A kind of projection positioning device, comprising:
Projector, for having the stripe pattern projection of setting rule to testee surface;
Video camera, for absorbing the deforming stripe image modulated by testee surface configuration;
Treating apparatus, for according to the locus of described deforming stripe image determination testee and/or change in location.
Preferably, described projector is also for projection screen projected image, and described candy strip is projecting to testee surface every a frame or the time slot between multiple image.
Preferably, described testee is staff or touching control.
Based on an interactive system for projective iteration, comprise display screen and according to any one projection positioning device aforementioned.
Preferably, described display screen is LCD display or LED display or projection screen.
The technique effect that the present invention is useful is:
By there is the stripe pattern projection of certain rule to testee surface, absorb the deforming stripe image modulated by testee surface undulation, and deforming stripe image is processed and analyzed, namely can determine that detected object is relative to the locus of screen display content and/or change in location, thus, instant invention overcomes traditional view-based access control model image processing method positioning precision limited, easily be disturbed, the shortcoming that False Rate is higher, higher positioning precision and real-time follow-up speed faster can be obtained, especially can be implemented in the free-hand body sense manipulation of the accurate smoothness on any display panel, there is speed fast, precision is high, measurement range is large waits remarkable advantage, obtain nature accurately smooth man-machine interaction effect directly perceived, and well manipulate experience for user provides.The present invention can be applicable to man-machine interaction occasion as various in classroom instruction, Entertainment etc., reaches the man-machine interaction experience having more feeling of immersion.
Under preferred embodiment, the present invention can be used in the reciprocal process of user and projection display system and carries out projective iteration, by candy strip is being projected to testee surface every a frame or the time slot between multiple image, projector can be made simultaneously for the projection of projection screen imaging and candy strip.
Accompanying drawing explanation
Fig. 1 is the structural representation of projection positioning device of the present invention and an interactive system embodiment;
Fig. 2 is the functional block diagram of a projection positioning device of the present invention embodiment;
Fig. 3 is the process flow diagram of a projective iteration method of the present invention embodiment;
Fig. 4 is the schematic diagram of stripe pattern projection and capture process in an embodiment;
Fig. 5 implements coarse positioning and pinpoint schematic diagram in an embodiment.
Embodiment
By reference to the accompanying drawings the present invention is described in further detail by the following examples.
See Fig. 1 and Fig. 2, in one embodiment, projection positioning device comprises projector, projector and treating apparatus, wherein, projector is used for having the stripe pattern projection of setting rule to testee surface, video camera for absorbing the deforming stripe image modulated by testee surface configuration, and sends obtained image information to treating apparatus such as computing machine, and treating apparatus is used for according to the locus of described deforming stripe image determination testee and/or change in location.Testee can be staff or use touching control alternately, to absorbing the deforming stripe image arrived, corresponding topography measurement algorithm can be utilized to carry out processing and obtain the data reconstruction of object surface tri-dimensional profile, thus determining locus and/or the change in location of staff or mutual touching control.
In a preferred embodiment, described projector is also for projection screen projected image, and described candy strip is projecting to testee surface every a frame or the time slot between multiple image.Therefore, the present embodiment projection positioning device is for the man-machine interaction in optical projection system, and the projection location of projection screen imaging and candy strip shares the projecting function of projector.The optical projection system formed thus is namely based on the interactive system of projective iteration.
With reference to Fig. 1, each several part of the interactive system of a preferred embodiment is described as follows:
Projector is used for projection screen projected image, and for projecting the candy strip of setting rule between picture frame.Projector comprises optical system and driving circuit, can launch candy strip in the gap of normal picture display.
Striped after change for taking digital striped, and is transferred to computing machine by video camera.Video camera preferably adopts high-speed camera, as ccd detector.
Short distance projector and wide-angle camera can be adopted to avoid being blocked of testee as far as possible.
Projection screen can be the screen that can be used for arbitrarily projecting.
Computing machine is as the control core of whole system, be responsible for the deforming stripe pattern controlling projector work and analyze video camera shooting, it, by certain algorithm, obtains the data reconstruction of object surface tri-dimensional profile, analyzes and determines locus and/or the change in location of mutual object.Preferably, computing machine adopts certain error model to reduce positioning error.
Except adopting the projection interactive system of projection screen, interactive system also can be the interactive system adopting other types display screen, and these display screens are such as LCD display or LED display, can be touch-screen or non-touch screen.By to testee such as staff projected fringe pattern, can realize the location of testee relative to the displaying contents on display screen especially its, thus by the Three-Dimensional Dynamic gestural feedback of user to the treating apparatus of interactive system, treating apparatus identifies these Three-Dimensional Dynamic gestures and converts the control command of system to, realizes human body temperature type mutual.
With reference to Fig. 3, a kind of projective iteration method of embodiment comprises the following steps:
Step a. will have the stripe pattern projection of setting rule to testee surface;
Step b. absorbs the deforming stripe image modulated by testee surface configuration;
Step c is according to the locus of described deforming stripe image determination testee and/or change in location.
In preferably embodiment, this method is used in the process of projection systems project imaging, can with the projector of optical projection system every a frame or the time slot projected fringe pattern between multiple image surperficial to testee.More preferably, within each work period, first projector launches a two field picture, before next frame image projection, launches candy strip on screen and testee.All project candy strip in the gap of every two field picture, the change of gesture can be followed the tracks of rapidly, located quickly and accurately.
Can hand or carry out interactive operation for the object such as thin rod of interactive identification.During for human body as testee, its measurand can be the change etc. of finger position, gesture motion and body gesture.
Candy strip realizes setting and change by programming, and the gap that projector is launched at picture frame, throws into screen and for carrying out mutual object by the digital stripe pattern of having programmed.
From in shape, candy strip can be ring-shaped stripe, rectangle striped, wire striped etc., also can adopt the localization method that multiple candy strip combines.Candy strip is preferably invisible light formation, such as infrared digital striped.
According to the performance of the different candy strip of the characteristic sum of testee, by combining the mode of locating with striped, to obtain higher positioning precision and response speed.In preferred embodiment, described candy strip comprises the striped spatially adapted with the different parts of testee (as finger fingertip, referring to body and the back of the hand) feature and combines.
As shown in Figure 4, the candy strip gone out at each picture frame interstitial transmissive can also be as the striped in gesture changes, motor pattern adapts sequential combines with the posture changing feature of testee.Such as, in the R(redness that projects out respectively), G(is green), B(is blue) etc. different colours, after forming colour projection's image, at the striped 1 of a time slot projection twill formula, at the striped 2 of future time interstitial transmissive skewed crossing grid type, at the striped 3 of future time interstitial transmissive square node formula again, thus better location is implemented to testee.
In some preferred embodiments, the deforming stripe image adopting the surface undulation of high-speed camera shooting testee to modulate, is delivered to computing machine by the candy strip after each distortion of synchronous acquisition.Computing machine carries out analyzing and processing to the image adopted by certain algorithm, according to the staff three-dimensional model set up in advance, obtains three-D profile and the fingertip location information of staff.Utilize corresponding topography measurement algorithm, body surface can be obtained and to rise and fall the change stripe pattern modulated.Topography measurement algorithm can be Fourier transform topography measurement method (FTP), one in topography measurement method (MMP), Spatial phase measurement method (SPD) etc. is measured in phase shift topography measurement method (PSP), modulation or combination.
When setting up staff three-dimensional model, multi-form striped can be chosen respectively and carry out simulation calculating, by parameter such as adjustment fringe spacing, projecting direction etc., analyze the adaptive faculty of often kind of candy strip to different hand shape, determine the performance parameter such as positioning precision, tracking velocity.By studying different striped to different hand shape adaptive faculty, projecting suitable striped, positioning precision and sensitivity can be improved.During test, by choosing some standard points on projection screen, the Static positioning accuracy of measuring system at diverse location place and dynamic responding speed.Such as, can to point or thin rod carries out touch control operation, inspection touch-control success ratio and positioning precision: moveable finger or carefully rod fast, travel through whole projection screen, detect its tracking velocity; Test hand shape, the colour of skin, hand position (as finger tip), the factors such as hand, hand positions and motor pattern of changing, on the impact of system performance, adopt the projective patterns of striped or the striped combination that can obtain located higher performance.
In some preferred embodiments, the analyzing and processing of computing machine also comprises the process to error effect, this process can comprise: position (can obtain the physical location of object with corresponding surveying instrument) and measuring position for reality are carried out analytical error and originated, and set up error model; The factor such as optical distortion, astigmatism of projection lens and pick-up lens of analyzing is on the impact of error, and analytic system whole geometry structure is on the impact of error; The methods such as use error table, Error Curve Fitting, estimation of error carry out error correction and compensation.By eliminating the impact of error as much as possible, localization and tracking more accurately can be obtained.According to these embodiments, first error model is set up according to source of error, numerous factor causing error is included in error model, find out the principal element causing error, wherein optical property factor normally needs an error effect factor of consideration, thus according to the principal element causing error, error correction table or rendering error calibration curve can be set up, in order to carry out Controlling and compensating to error.If source of error is in the cause of projective patterns, then can change projective patterns type.
Furthermore, following better locator meams can especially be adopted.In these preferred embodiments, according to the candy strip information collected, adopt " the thick smart two-stage " stage to implement locating and tracking, first quick lock in fingertip area, then it is accurately located." thick smart two-stage " the locating and tracking mode of employing as shown in Figure 5, for the staff as testee, the first approximate region A of quick lock in finger tip, more accurately location is carried out to it determine finger tip precise region B.
In some preferred embodiments, also stripe subdividing process be can carry out by fringe gray level information, measuring accuracy and tracking velocity improved further.
Above content is in conjunction with concrete preferred implementation further description made for the present invention, can not assert that specific embodiment of the invention is confined to these explanations.For general technical staff of the technical field of the invention, without departing from the inventive concept of the premise, some simple deduction or replace can also be made, all should be considered as belonging to protection scope of the present invention.
Claims (13)
1. a projective iteration method, is characterized in that, comprises the following steps:
A. at projector in projection screen projected image process, every a frame or the time slot between multiple image, the stripe pattern projection that described projector will have setting rule is surperficial to testee;
B. the deforming stripe image modulated by testee surface configuration is absorbed;
C. according to described deforming stripe image determination testee relative to the locus of screen display content and change in location, testee is positioned and real-time follow-up, to realize the body sense manipulation on projection screen;
Described step c comprises: first implement coarse positioning substantially to lock testee region, more accurately locate it; And/or utilize fringe gray level information to carry out stripe subdividing process.
2. the method for claim 1, it is characterized in that, the locus of described testee and/or change in location are that the data reconstruction obtaining object surface tri-dimensional profile by topography measurement algorithm is determined, described topography measurement algorithm is selected from Fourier transform topography measurement method FTP, phase shift topography measurement method PSP, modulation is measured in topography measurement method MMP, Spatial phase measurement method SPD one or more.
3. the method as described in any one of claim 1-2, it is characterized in that, described candy strip comprises: the striped spatially adapted with the different parts feature of testee combines, and/or the striped in the sequential adapted with the posture changing feature of testee combines.
4. method as claimed in claim 3, it is characterized in that, the factor of described setting rule comprises the shape of striped, thickness, spacing, gray scale, brightness, contrast and projecting direction.
5. the method as described in any one of claim 1-2, is characterized in that, the shape of striped is that ring-type or linearity are wavy or latticed.
6. the method as described in any one of claim 1-2, it is characterized in that, described testee is staff, before step a, by setting up staff three-dimensional model, choose multi-form candy strip respectively and carry out simulation calculating, analyze the adaptive faculty of often kind of candy strip to different hand shape, gesture, hand position, the colour of skin and motor pattern, presetting can for the candy strip of projection.
7. the method as described in any one of claim 1-2, is characterized in that, described candy strip is the candy strip that non-visible light is formed.
8. method as claimed in claim 7, is characterized in that, described candy strip is the candy strip that infrared ray is formed.
9. the method as described in any one of claim 1-2, is characterized in that, in step c, the locus of testee and the determination of change in location are through Error processing, and described Error processing comprises:
Originate for the physical location of testee and measuring position analytical error, set up error model;
The optical property factor of projection lens and pick-up lens of analyzing is on the impact of error, and/or analytic system whole geometry structure is on the impact of error, and described optical property factor at least comprises optical distortion and astigmatism;
By setting up error correction table or rendering error calibration curve carries out error correction and compensation.
10. based on an exchange method for projective iteration, for carrying out alternately, it is characterized in that, comprising with the system providing image to show:
In the step of projection screen display image;
Projective iteration method according to any one of claim 1-9 is shown the step of framing testee relatively;
According to the step of positioning result to described system feedback control information.
11. 1 kinds of projection positioning devices, is characterized in that, comprising:
Projector, in projection screen projected image process, every a frame or the time slot between multiple image, will have the stripe pattern projection of setting rule to testee surface;
Video camera, for absorbing the deforming stripe image modulated by testee surface configuration;
Treating apparatus, for according to described deforming stripe image determination testee relative to the locus of screen display content and change in location, testee is positioned and real-time follow-up, to realize the body sense manipulation on projection screen; Wherein treating apparatus first implements coarse positioning substantially to lock testee region, more accurately locates it; And/or utilize fringe gray level information to carry out stripe subdividing process.
12. projection positioning devices as claimed in claim 11, it is characterized in that, described testee is staff or touching control.
13. 1 kinds, based on the interactive system of projective iteration, is characterized in that, comprise projection screen and the projection positioning device according to any one of claim 11-12.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110302639.1A CN102508578B (en) | 2011-10-09 | 2011-10-09 | Projection positioning device and method as well as interaction system and method |
| HK12108794.7A HK1168166A1 (en) | 2011-10-09 | 2012-09-07 | Projection positioning device and method, interactive system and interactive method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110302639.1A CN102508578B (en) | 2011-10-09 | 2011-10-09 | Projection positioning device and method as well as interaction system and method |
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| Publication Number | Publication Date |
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| CN102508578A CN102508578A (en) | 2012-06-20 |
| CN102508578B true CN102508578B (en) | 2015-07-22 |
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| CN201110302639.1A Expired - Fee Related CN102508578B (en) | 2011-10-09 | 2011-10-09 | Projection positioning device and method as well as interaction system and method |
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| CN (1) | CN102508578B (en) |
| HK (1) | HK1168166A1 (en) |
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| TWI465989B (en) * | 2012-10-17 | 2014-12-21 | The projection touch apparatus | |
| CN103227912B (en) * | 2013-04-02 | 2016-01-20 | 苏州佳世达光电有限公司 | A kind of method and optical projection system improving the picture quality of optical projection system |
| CN104133565B (en) * | 2014-07-24 | 2017-05-24 | 四川大学 | Real-time laser point tracking man-machine interaction system realized by utilizing structured light technology |
| CN105629199A (en) * | 2014-11-04 | 2016-06-01 | Tcl集团股份有限公司 | Indoor positioning method and system |
| CN104596413B (en) * | 2014-12-25 | 2017-08-11 | 于天舒 | The photogrammetric survey method of liquid crystal display and its application |
| CN104930986B (en) * | 2015-06-17 | 2019-09-24 | 泉州师范学院 | A kind of projection and camera system for measuring three-dimensional morphology |
| CN106461380B (en) * | 2016-08-31 | 2019-04-05 | 深圳大学 | A kind of projector lens distortion correction method and its system based on adaptive striped |
| CN107632744A (en) * | 2017-09-09 | 2018-01-26 | 深圳大学 | A kind of desktop alternative projection system and control method |
| CN107786816A (en) * | 2017-09-14 | 2018-03-09 | 天津大学 | Adaptive projecting method based on exposure compensating |
| DE102018203349A1 (en) * | 2018-03-07 | 2019-09-12 | BSH Hausgeräte GmbH | Interaction module |
| DE102018203343A1 (en) * | 2018-03-07 | 2019-09-12 | BSH Hausgeräte GmbH | Interaction module |
| CN109591033A (en) * | 2018-09-28 | 2019-04-09 | 广州智伴人工智能科技有限公司 | A kind of non-contact type human-machine interaction system |
| CN113758437B (en) * | 2021-11-05 | 2022-03-18 | 北京创米智汇物联科技有限公司 | Non-contact deformation monitoring system and method |
| CN114820670A (en) * | 2022-03-23 | 2022-07-29 | 合肥嘉石科普服务有限公司 | Laser projection interaction method, system and device |
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- 2012-09-07 HK HK12108794.7A patent/HK1168166A1/en not_active IP Right Cessation
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| US6541761B1 (en) * | 1999-08-31 | 2003-04-01 | Dr. Johannas Heidenhain Gmbh | Optical position measuring system with a graduation that causes essentially only first orders of diffraction |
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Also Published As
| Publication number | Publication date |
|---|---|
| HK1168166A1 (en) | 2012-12-21 |
| CN102508578A (en) | 2012-06-20 |
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