CN101452191A - Projection device protective system and protection method - Google Patents
Projection device protective system and protection method Download PDFInfo
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- CN101452191A CN101452191A CNA2007102028393A CN200710202839A CN101452191A CN 101452191 A CN101452191 A CN 101452191A CN A2007102028393 A CNA2007102028393 A CN A2007102028393A CN 200710202839 A CN200710202839 A CN 200710202839A CN 101452191 A CN101452191 A CN 101452191A
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- image
- projection
- human face
- picture
- face region
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Abstract
A projector device protecting system comprises a signal processor, a projection lens, an image picking-up device, an analyzer, and a human face area detector. The signal processor processes the image signal which is input in the projector device for outputting projection image. The projection lens projects the projection image processed by the signal processor to an exterior screen. The image picking-up device picks up the picking-up image comprising the projection image. The analyzer analyzes whether a human face exists in the projection area between the projector device and the screen according to the picking-up image. The human face area detector calculates the projection area of projected image in the picking-up image, calculates the relative position of human face area in the projection area when a human face exists in the projection area and outputs a detection signal. According to the detection signal, the part of the output picture output from the signal processor corresponding to the human face area is black. The projection lens projects the picture to the exterior screen. The invention also relates to a projector device protecting method.
Description
Technical field
The present invention relates to a kind of projection arrangement, relate in particular to a kind of projection device protective system and guard method.
Background technology
Usually, exist between a bigger projection area between projection arrangement and the screen, the user often need do explanation to the picture that projects when making bulletin, the explanation personnel can unconsciously enter between the projection area or other staff are strayed into the projected area, and the light that projection arrangement sends will shine directly into human eye and damage.Along with projection arrangement goes out the more trend development of the more clear picture of Gao Gengliang towards projection, this extent of injury is increasing gradually, and the light that projection arrangement sends not only allows human eye feel uncomfortable, and serious also can causing is blind.Therefore, projection arrangement becomes urgent problem to the active protection of human eye.
Summary of the invention
In view of above content, be necessary to provide a kind of projection device protective system and the guard method that can protect human eye.
A kind of projection device protective system, it comprises a signal processing apparatus, a projection lens, an image capture unit, an analytical equipment and people's face regional detection device.Described signal processing apparatus is input to the picture signal of projection arrangement with the output projected image in order to processing.Described projection lens in order to the projected after the described signal processing means processes to exterior screen.Described image capture unit comprises the pick-up image of projected image in order to acquisition.Described analytical equipment is in order to analyze between the projection area between projection arrangement and the screen whether have people's face according to described pick-up image.Described human face region pick-up unit is in order to calculate the drop shadow spread of described projected image in described pick-up image, and when between described projection area, having people's face, according to described pick-up image calculate human face region in described drop shadow spread relative position and export a detection signal.According to described detection signal, picture that described signal processing apparatus is exported and the corresponding part of described human face region are black.The described picture of described projection lens projects is to exterior screen.
A kind of projection arrangement guard method, this method may further comprise the steps: the picture signal of accepting extraneous input is to export projected image and to be projected to exterior screen, and acquisition comprises the pick-up image of projected image; Calculate the drop shadow spread of described projected image in described pick-up image according to the luminance difference between described pick-up image and the described projected image; According to whether having people's face between the projection area between described pick-up image analysis projection arrangement and the screen; If have people's face between the projection area, then calculate human face region, and calculate people's face at the relative position of described drop shadow spread and export a detection signal according to described drop shadow spread and described human face region according to described pick-up image; According to described detection signal, output picture and the corresponding part of described human face region are black and throw described picture to exterior screen.
A kind of projection arrangement guard method, this method may further comprise the steps: the black full picture of projection is to screen and capture first image, the complete white picture of projection is to screen and capture second image, and the difference of more described first image and described second image calculates the drop shadow spread of black picture in described first image of projection; The picture signal of accepting extraneous input is to export projected image and to be projected to exterior screen; Acquisition comprises the pick-up image of projected image, according to whether having people's face between the projection area between described pick-up image analysis projection arrangement and the screen; If have people's face between the projection area, then calculate human face region, and calculate people's face at the relative position of described drop shadow spread and export a detection signal according to described drop shadow spread and described human face region according to described pick-up image; According to described detection signal, output picture and the corresponding part of described human face region are black and throw described picture to exterior screen.
Compared with prior art; projection device protective system of the present invention and guard method detect the relative position of people's face in drop shadow spread by the human face region pick-up unit; and after handling by signal processing apparatus; in described people's appearance the picture with the corresponding part of described human face region of position projection is shown as black, thereby realizes entering the defencive function of people's eyes between the projection area.
Description of drawings
Fig. 1 is the functional block diagram of projection device protective system of the present invention;
Fig. 2 is that projection device protective system human face region of the present invention detects synoptic diagram;
Fig. 3 is the flow chart of steps of projection arrangement guard method first embodiment of the present invention;
Fig. 4 is the flow chart of steps of projection arrangement guard method second embodiment of the present invention.
Embodiment
Below in conjunction with accompanying drawing, the present invention is described in further detail.
See also Fig. 1, be the functional block diagram of projection device protective system 100 of the present invention.This projection device protective system 100 comprises an image capture unit 10, analytical equipment 20, people's face regional detection device 30, a signal processing apparatus 40 and a projection lens 50.
Described signal processing apparatus 40 is input to the picture signal of projection arrangement with the output projected image in order to processing.
Described projection lens 50 is in order to be projected to exterior screen with described signal processing apparatus 40 projection image processed.
Described image capture unit 10 comprises the pick-up image of projected image in order to acquisition.
Described analytical equipment 20 is in order to analyze between the projection area between projection arrangement and the screen whether have people's face according to described pick-up image.
Please in conjunction with Figure 1 and Figure 2, described human face region pick-up unit 30 is used for detecting the relative position of human face region in described drop shadow spread when there is people's face in described projection.Described human face region pick-up unit 30 comprises that also drop shadow spread's computing unit 32, a human face region computing unit 34 and people's appearance are to position calculation unit 36.Described drop shadow spread computing unit 32 is in order to calculate the drop shadow spread (a of described projected image in described pick-up image according to the luminance difference between described pick-up image and the described projected image
1, b
1, a
2, b
2).Described human face region computing unit 34 calculates human face region (x according to described pick-up image
1, y
1, x
2, y
2).Described people's appearance to position calculation unit 36 according to the described (a of drop shadow spread
1, b
1, a
2, b
2) and described human face region (x
1, y
1, x
2, y
2) calculate people's face at the described (a of drop shadow spread
1, b
1, a
2, b
2) relative position (| x
1-a
1|, | y
1-b
1|, | x
2-a
2|, | y
2-b
2|) and export a detection signal.Described signal processing apparatus 40 is according to described detection signal output and human face region (x
1, y
1, x
2, y
2) corresponding black picture, described projection lens 50 people's appearance to the position (| x
1-a
1|, | y
1-b
1|, | x
2-a
2|, | y
2-b
2|) locate to throw described black picture to screen to hide and human face region (x
1, y
1, x
2, y
2) corresponding projected image part.
Be appreciated that described drop shadow spread computing unit 32 is not limited to calculate the described (a of drop shadow spread according to the luminance difference between described pick-up image and the described projected image
1, b
1, a
2, b
2).Can also be the complete black picture that is processed into of the described signal processing apparatus 40 of described projection lens 50 projections behind screen, described image capture unit 10 acquisitions first image.The complete white picture that the described signal processing apparatus 40 of described projection lens 50 projections is processed into is behind screen, and described image capture unit 10 captures second image.The difference of described drop shadow spread computing unit 32 more described first images and described second image calculates the complete black drop shadow spread (a of picture in described first image of projection
1, b
1, a
2, b
2).
Be appreciated that described signal processing apparatus 40 can also according to described detection signal directly with in the projected image with human face region (x
1, y
1, x
2, y
2) corresponding section processes becomes the black picture.
Please in conjunction with Fig. 2 and Fig. 3, the steps flow chart of projection arrangement guard method first embodiment of the present invention is as follows:
Step S100, the picture signal of accepting extraneous input with the output projected image and with described projected to exterior screen, acquisition comprises the pick-up image of described projected image;
Step S102 calculates the drop shadow spread (a of described projected image in described pick-up image according to the luminance difference between described pick-up image and the projected image
1, b
1, a
2, b
2);
Step S104 is according to whether having people's face between the projection area between described pick-up image analysis projection arrangement and the screen;
Step S106 if do not have people's face between the projection area, then throws projected image, if having people's face between the projection area, then calculates human face region (x according to described pick-up image
1, y
1, x
2, y
2), and according to the described (a of drop shadow spread
1, b
1, a
2, b
2) and described human face region (x
1, y
1, x
2, y
2) calculate people's face at the described (a of drop shadow spread
1, b
1, a
2, b
2) relative position (| x
1-a
1|, | y
1-b
1|, | x
2-a
2|, | y
2-b
2|) and export a detection signal;
Step S108 is according to described detection signal output and human face region (x
1, y
1, x
2, y
2) corresponding black picture, people's appearance to the position (| x
1-a
1|, | y
1-b
1|, | x
2-a
2|, | y
2-b
2|) locate to throw described black picture to screen to hide and human face region (x
1, y
1, x
2, y
2) corresponding projected image part.
Be appreciated that step S108 is not limited to adopt the mode described in the present embodiment, can also be according to described detection signal directly with in the projected image with human face region (x
1, y
1, x
2, y
2) corresponding section processes becomes the black picture and be projected to screen.
Please in conjunction with Fig. 2 and Fig. 4, the steps flow chart of projection arrangement guard method second embodiment of the present invention is as follows:
Step S200, the black full picture of projection is to screen and capture first image, the complete white picture of projection is to screen and capture second image, and the difference of more described first image and described second image calculates the drop shadow spread (a of black picture in described first image of projection
1, b
1, a
2, b
2);
Step S202, the picture signal of accepting extraneous input is to export projected image and to be projected to screen;
Step S204, acquisition comprises the image of projected image, analyzes between the projection area whether have people's face according to described pick-up image;
Step S206 if do not have people's face between the projection area, then throws projected image, if having people's face between the projection area, then calculates human face region (x according to described pick-up image
1, y
1, x
2, y
2), and according to the described (a of drop shadow spread
1, b
1, a
2, b
2) and described human face region (x
1, y
1, x
2, y
2) calculate people's face at the described (a of drop shadow spread
1, b
1, a
2, b
2) relative position (| x
1-a
1|, | y
1-b
1|, | x
2-a
2|, | y
2-b
2|) and export a detection signal;
Step S208 is according to described detection signal output and human face region (x
1, y
1, x
2, y
2) corresponding black picture, people's appearance to the position (| x
1-a
1|, | y
1-b
1|, | x
2-a
2|, | y
2-b
2|) locate to throw described black picture to screen to hide and human face region (x
1, y
1, x
2, y
2) corresponding projected image part.
Be appreciated that step S208 is not limited to adopt the mode described in the present embodiment, can also be according to described detection signal directly with in the projected image with human face region (x
1, y
1, x
2, y
2) corresponding section processes becomes the black picture and be projected to screen.
The projection device protective system of embodiment of the present invention and guard method detect the relative position of people's face in drop shadow spread by the human face region pick-up unit; and after handling by signal processing apparatus; in described people's appearance the picture with the corresponding part of described human face region of position projection is shown as black, thereby realizes entering the defencive function of people's eyes between the projection area.
Be understandable that, for the person of ordinary skill of the art, can make other various corresponding changes and distortion by technical conceive according to the present invention, and all these change the protection domain that all should belong to claim of the present invention with distortion.
Claims (11)
- [claim 1] a kind of projection device protective system, it comprises:A signal processing apparatus, its picture signal that is input to projection arrangement in order to processing is with the output projected image;A projection lens, its in order to the projected after the described signal processing means processes to exterior screen; It is characterized in that,Described projection device protective system also comprises an image capture unit; it comprises the pick-up image of projected image in order to acquisition; an analytical equipment; it is in order to analyze between the projection area between projection arrangement and the screen whether have people's face according to described pick-up image; people's face regional detection device; it is in order to calculate the drop shadow spread of described projected image in described pick-up image; and when between described projection area, having people's face; according to described pick-up image calculate human face region in described drop shadow spread relative position and export a detection signal; according to described detection signal; picture that described signal processing apparatus is exported and the corresponding part of described human face region are black, and the described picture of described projection lens projects is to exterior screen.
- [claim 2] projection device protective system as claimed in claim 1 is characterized in that, described human face region pick-up unit also comprises:Drop shadow spread's computing unit, it is in order to calculate the drop shadow spread of described projected image in described pick-up image according to the luminance difference between described pick-up image and the described projected image;A human face region computing unit, it is in order to calculate human face region according to described pick-up image;People's appearance calculates the relative position of people's face in described drop shadow spread to position calculation unit according to described drop shadow spread and described human face region.
- [claim 3] projection device protective system as claimed in claim 1 is characterized in that, described human face region pick-up unit also comprises:Drop shadow spread's computing unit, complete black picture that the described signal processing means processes of described projection lens projection becomes and complete white picture to screen, described drop shadow spread computing unit according to described image capture unit respectively when black full picture of described projection lens projection and the complete white picture picked image calculate the described complete black drop shadow spread of picture in described pick-up image;A human face region computing unit, it is in order to calculate human face region according to described pick-up image;People's appearance calculates the relative position of people's face in described drop shadow spread to position calculation unit according to described drop shadow spread and described human face region.
- [claim 4] projection device protective system as claimed in claim 1; it is characterized in that; according to described detection signal; output of described signal processing apparatus and the corresponding black picture of human face region, described people's appearance to the place, position state the described black picture of projection lens projects to screen to hide and the corresponding projected image part of human face region.
- [claim 5] projection device protective system as claimed in claim 1; it is characterized in that; according to described detection signal, described signal processing apparatus directly will become the black picture with the corresponding section processes of human face region in the described projected image, and by projection lens projects to screen.
- [claim 6] a kind of projection arrangement guard method is characterized in that this method may further comprise the steps:The picture signal of accepting extraneous input is to export projected image and to be projected to exterior screen, and acquisition comprises the pick-up image of projected image;Calculate the drop shadow spread of described projected image in described pick-up image according to the luminance difference between described pick-up image and the described projected image;According to whether having people's face between the projection area between described pick-up image analysis projection arrangement and the screen;If have people's face between the projection area, then calculate human face region, and calculate people's face at the relative position of described drop shadow spread and export a detection signal according to described drop shadow spread and described human face region according to described pick-up image;According to described detection signal, output picture and the corresponding part of described human face region are black and throw described picture to exterior screen.
- [claim 7] projection arrangement guard method as claimed in claim 6; it is characterized in that; according to described detection signal; output and the corresponding black picture of human face region, people's appearance to the position throw described black picture to screen to hide and the corresponding projected image part of human face region.
- [claim 8] projection arrangement guard method as claimed in claim 6 is characterized in that, directly will become the black picture and be projected to screen with the corresponding section processes of human face region in the described projected image according to described detection signal.
- [claim 9] a kind of projection arrangement guard method is characterized in that this method may further comprise the steps:The black full picture of projection is to screen and capture first image, and the complete white picture of projection is to screen and capture second image, and the difference of more described first image and described second image calculates the drop shadow spread of black picture in described first image of projectionThe picture signal of accepting extraneous input is to export projected image and to be projected to exterior screen;Acquisition comprises the pick-up image of projected image, according to whether having people's face between the projection area between described pick-up image analysis projection arrangement and the screen;If have people's face between the projection area, then calculate human face region, and calculate people's face at the relative position of described drop shadow spread and export a detection signal according to described drop shadow spread and described human face region according to described pick-up image;According to described detection signal, output picture and the corresponding part of described human face region are black and throw described picture to exterior screen.
- [claim 10] projection arrangement guard method as claimed in claim 9; it is characterized in that; according to described detection signal; output and the corresponding black picture of human face region, people's appearance to the position throw described black picture to screen to hide and the corresponding projected image part of human face region.
- [claim 11] projection arrangement guard method as claimed in claim 9 is characterized in that, directly will become the black picture and be projected to screen with the corresponding section processes of human face region in the described projected image according to described detection signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007102028393A CN101452191A (en) | 2007-12-04 | 2007-12-04 | Projection device protective system and protection method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007102028393A CN101452191A (en) | 2007-12-04 | 2007-12-04 | Projection device protective system and protection method |
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| Publication Number | Publication Date |
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| CN101452191A true CN101452191A (en) | 2009-06-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2007102028393A Pending CN101452191A (en) | 2007-12-04 | 2007-12-04 | Projection device protective system and protection method |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101795375B (en) * | 2009-12-30 | 2012-07-18 | 广东威创视讯科技股份有限公司 | Device for displaying projection and method for controlling projection |
| CN102914936A (en) * | 2012-09-20 | 2013-02-06 | 深圳雅图数字视频技术有限公司 | Method and device for controlling projector |
| CN104601917A (en) * | 2015-01-26 | 2015-05-06 | 苏州佳世达光电有限公司 | Eye protection projection method and device |
| CN105959659A (en) * | 2016-04-28 | 2016-09-21 | 乐视控股（北京）有限公司 | Method for realizing projector adaptive adjustment and projector |
| CN109031868A (en) * | 2018-07-26 | 2018-12-18 | 漳州万利达科技有限公司 | A kind of ultrashort burnt table top projectors with eye protection function |
| CN109803132A (en) * | 2018-12-20 | 2019-05-24 | 合肥凌极西雅电子科技有限公司 | A kind of projection device hommization intelligence control system and method |
-
2007
- 2007-12-04 CN CNA2007102028393A patent/CN101452191A/en active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101795375B (en) * | 2009-12-30 | 2012-07-18 | 广东威创视讯科技股份有限公司 | Device for displaying projection and method for controlling projection |
| CN102914936A (en) * | 2012-09-20 | 2013-02-06 | 深圳雅图数字视频技术有限公司 | Method and device for controlling projector |
| CN102914936B (en) * | 2012-09-20 | 2016-02-17 | 深圳雅图数字视频技术有限公司 | The control method of projector and device |
| CN104601917A (en) * | 2015-01-26 | 2015-05-06 | 苏州佳世达光电有限公司 | Eye protection projection method and device |
| CN104601917B (en) * | 2015-01-26 | 2018-07-27 | 苏州佳世达光电有限公司 | A kind of eye shield projection method and projection arrangement |
| CN105959659A (en) * | 2016-04-28 | 2016-09-21 | 乐视控股（北京）有限公司 | Method for realizing projector adaptive adjustment and projector |
| CN109031868A (en) * | 2018-07-26 | 2018-12-18 | 漳州万利达科技有限公司 | A kind of ultrashort burnt table top projectors with eye protection function |
| CN109031868B (en) * | 2018-07-26 | 2020-09-22 | 漳州万利达科技有限公司 | Ultrashort-focus desktop projector with eye protection function |
| CN109803132A (en) * | 2018-12-20 | 2019-05-24 | 合肥凌极西雅电子科技有限公司 | A kind of projection device hommization intelligence control system and method |
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Open date: 20090610 |