CN101452193B - Device with projection control function, projection control method, computer and porjector - Google Patents
Device with projection control function, projection control method, computer and porjector Download PDFInfo
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- CN101452193B CN101452193B CN2007101785396A CN200710178539A CN101452193B CN 101452193 B CN101452193 B CN 101452193B CN 2007101785396 A CN2007101785396 A CN 2007101785396A CN 200710178539 A CN200710178539 A CN 200710178539A CN 101452193 B CN101452193 B CN 101452193B
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Abstract
The invention provides a protection control method and a device, a computer and a projector with the projection control function, wherein the device comprises an image acquisition module, a first user positioning module, a first forbidding module, and a transmission module. The image acquisition module is used for acquiring an original image to be projected and a practical environmental image in projection area of the projector; the first user positioning module is used for comparing the original image to be projected and the practical environmental image, and determining a first pixel corresponding to the position of a user in the original image to be projected according to a comparison result; the first forbidding module is used for forbidding the first pixel in the original image to be projected so as to form a first image to be projected; and the first transmission module is used for transmitting the first image to be projected to the projector for projection. The invention eliminates the impact of projection light on the user in the process of projection, thereby protecting eyes of the user.
Description
Technical field
The present invention relates to technical field of image processing, particularly a kind of device with projection control function and method for controlling projection, computer, projector.
Background technology
The projector that is used for projects images can amplify demonstration with the picture signal that image supply devices such as computing machine are supplied with on screen, so projector is widely used in various situations such as meeting, demonstration.
During in situations such as meeting, demonstrations, a host or speaker are arranged all generally speaking in projector applications, this host or speaker preside over before screen or give a lecture.If host or speaker are between projector and the projection screen, it is the health that is incident upon host or speaker that part light must be arranged in the light of projector projects, and be between projector and the projection screen host or speaker, and during in the face of projector, the light of projector projects can shine directly into host or speaker's eyes, cause host or speaker's discomfort, when throw light is strong, even can host or speaker's eyesight be caused damage.
In order to address the above problem, a kind of projected light beam controlling schemes is arranged in the prior art, under this scheme, utilize ultrasonic listening people's existence, when detecting the people and just in time be in projector the place ahead, close the light beam of projector, but this scheme is owing to directly close projected light beam, host or speaker can't carry out follow-up hosting or speech according to projected image.
Summary of the invention
The purpose of the embodiment of the invention provides a kind of device with projection control function and method for controlling projection, computer, projector, eliminates the influence of the throw light of projector to user's vision.
To achieve these goals, an alternative embodiment of the invention provides the device with projection control function, wherein, comprising:
Image collection module is used to obtain the original actual environment image for the treatment of projected image and projector projects zone;
First user's locating module, be used for described actual environment image is handled, obtain and the described original actual environment changing image for the treatment of the projected image Matching Alignment, more described original treat projected image and with the described original actual environment image for the treatment of the projected image Matching Alignment, and determine described original all corresponding in the projected image first pixels for the treatment of with customer location according to comparative result;
First disabled module is used for forbidding described original all first pixels corresponding with the active user position for the treatment of projected image, forms first and treats projected image;
First sending module is used for treating that with described first projected image sends to described projector and throws;
Preferably, above-mentioned device, first user's locating module specifically comprises:
The Matching Alignment unit, be used for calculating affine transformation relationship according to the described original mated alignment features of projected image and described actual environment image for the treatment of, and handle described actual environment image according to described affine transformation relationship, obtain and the described original actual environment changing image for the treatment of the projected image Matching Alignment;
The contrast unit, more described actual environment changing image and the described original projected image for the treatment of are determined described original all corresponding with customer location in the projected image first pixels for the treatment of.
Preferably, above-mentioned device also comprises:
Second user's locating module, what be used for that the comparison last time sends to that described projector carries out projection treats projected image and described actual environment image, and determines original all corresponding with the active user position in the projected image second pixels for the treatment of according to comparative result;
Second disabled module is used for forbidding described original all second pixels corresponding with the active user position for the treatment of projected image, forms second and treats projected image;
Second sending module is used for treating that with described second projected image sends to described projector and throws.
To achieve these goals, one embodiment of the present of invention provide a kind of method for controlling projection, comprising:
Obtain the original actual environment image for the treatment of projected image and projector projects zone;
Described actual environment image is handled, obtain and the described original actual environment changing image for the treatment of the projected image Matching Alignment, more described original treat projected image and with the described original actual environment image for the treatment of the projected image Matching Alignment, and determine described original all corresponding in the projected image first pixels for the treatment of with customer location according to comparative result;
Forbid described original all first pixels corresponding for the treatment of in the projected image, form first and treat projected image with the active user position;
Throw described first and treat projected image.
Preferably, in the said method, described original projected image and the described actual environment image treated, and determine that according to comparative result the described original step of all corresponding with customer location in the projected image first pixels for the treatment of specifically comprises:
Calculate affine transformation relationship according to the described original mated alignment features of projected image and described actual environment image for the treatment of, and handle described actual environment image according to described affine transformation relationship, obtain and the described original actual environment changing image for the treatment of the projected image Matching Alignment;
More described actual environment changing image and the described original projected image for the treatment of are determined described original all corresponding with customer location in the projected image first pixels for the treatment of.
Preferably, said method also comprises step:
Relatively more last send to that described projector carries out projection treat projected image and described actual environment image, and determine original all corresponding in the projected image second pixels for the treatment of with the active user position according to comparative result;
Forbid described original all second pixels corresponding for the treatment of in the projected image, form second and treat projected image with the active user position;
Throw described second and treat projected image.
To achieve these goals, another embodiment of the present invention provides a kind of computer, comprises display, CPU, hard disk, wherein, also comprises:
Image collection module is used to obtain the original actual environment image for the treatment of projected image and projector projects zone;
First user's locating module, be used for described actual environment image is handled, obtain and the described original actual environment changing image for the treatment of the projected image Matching Alignment, more described original treat projected image and with the described original actual environment image for the treatment of the projected image Matching Alignment, and determine described original all corresponding in the projected image first pixels for the treatment of with customer location according to comparative result;
First disabled module is used for forbidding described original all first pixels corresponding with the active user position for the treatment of projected image, forms first and treats projected image;
First sending module is used for treating that with described first projected image sends to described projector and throws.
To achieve these goals, another embodiment of the present invention provides a kind of projector, comprises projection module, wherein, also comprises:
Image collection module is used to obtain the original actual environment image for the treatment of projected image and projector projects zone;
First user's locating module, be used for described actual environment image is handled, obtain and the described original actual environment changing image for the treatment of the projected image Matching Alignment, more described original treat projected image and with the described original actual environment image for the treatment of the projected image Matching Alignment, and determine described original all corresponding in the projected image first pixels for the treatment of with customer location according to comparative result;
First disabled module is used for forbidding described original all first pixels corresponding with the active user position for the treatment of projected image, forms first and treats projected image;
First sending module is used for treating that with described first projected image sends to described projection module.
At least one embodiment of the present invention has following beneficial effect:
After determining customer location by the image of relatively treating projected image and actual view field, forbid treating in the projected image and the corresponding pixel of user, therefore, do not have projection ray's direct irradiation eyes of user, eliminated the influence of projection ray, protected user's eyes the user;
Simultaneously,, can eliminate the influence of projection ray at any time, protection user's eyes along with user's motion to the user by the processing of second locating module and second disabled module.
Description of drawings
Fig. 1 is the structural representation of the device with projection control function of the embodiment of the invention;
Fig. 2 is the schematic flow sheet of the method for controlling projection of the embodiment of the invention.
Embodiment
The device with projection control function of the specific embodiment of the invention and method for controlling projection, computing machine, projector; at first obtain formed actual projection images after the projector projects; and then compare actual projection images and treat projected image; determine customer location; forbid treating the pixel of customer location correspondence in the projected image; thereby, user's health or face can not shone by throw light, thus the protection user.
Fig. 1 is the structural representation of the device with projection control function of the embodiment of the invention, and as shown in Figure 1, this device with projection control function comprises:
First image collection module is used to obtain the original projected image for the treatment of, at this, this original projected image for the treatment of is the digital picture from image supply device (as computing machine, digital camera etc.);
Second image collection module is used to obtain the actual environment image in projector projects zone; When the user was between projector and the projection screen, this actual environment image was the stack of projector projects image and user image;
First user's locating module is used for more original projected image and the actual environment image treated, and determines original first corresponding with the active user position in the projected image pixel for the treatment of according to comparative result;
First disabled module is used for forbidding original first pixel for the treatment of projected image, forms first and treats projected image;
First sending module is used for treating that with first projected image sends to projector and throws.
At this, as shown in Figure 1, this user's locating module specifically comprises:
The Matching Alignment unit, calculate affine transformation relationship according to the original mated alignment features of projected image and actual environment image for the treatment of, and, obtain and the original actual environment changing image for the treatment of the projected image Matching Alignment according to the affine transformation relationship processing actual environment image that calculates;
Need finish coupling between two width of cloth characteristics of image according to mated alignment features based on the Matching Alignment method of mated alignment features, set up affine transformation relationship between the image by the matching relationship of feature.
Images match mainly is to set up two affine transformation relationship between the image, and further closes the various affined transformation distortions of introducing in the elimination shooting process (mainly being rotation, translation and change of scale) according to affined transformation.
This mated alignment features can be the edge, angle point in the image etc., and the edge can pass through edge detection operator (as Sobel operator, Canny operator etc.) and detect, and angle point can pass through Corner Detection operator (as the Susan operator) detection;
As angle point, just can utilize the affined transformation of corresponding angle calculation mean square value error minimum;
At this, can be by the actual environment image to be carried out translation, rotation and scale make and the original projected image Matching Alignment for the treatment of; Behind zone unnecessary and invalid under the shearing (the normally boundary member of image), the image that just can obtain Matching Alignment is right.
The contrast unit, relatively actual environment changing image and the original projected image for the treatment of are determined original first corresponding with customer location in the projected image pixel for the treatment of.
The method for controlling projection of the embodiment of the invention specifically comprises as shown in Figure 2:
This step 22 specifically comprises:
Step 221, calculate affine transformation relationship according to the original mated alignment features of projected image and actual environment image for the treatment of, and, obtain and the original actual environment changing image for the treatment of the projected image Matching Alignment according to the affine transformation relationship processing actual environment image that calculates;
Step 222, relatively actual environment changing image and the original projected image for the treatment of are determined original first pixel for the treatment of that projected image is corresponding with the active user position.
In step 222, need be by relatively actual environment changing image and the original projected image for the treatment of, determine that customer location corresponding to original first pixel for the treatment of in the projected image, can realize in the following manner in specific embodiments of the invention.
1, pixel comparative approach one by one
Obtain with the original actual environment changing image for the treatment of the projected image Matching Alignment after, the actual environment changing image treats that with original the resolution of projected image is consistent, can utilize visual signature parameter (as brightness, color, contrast etc.) that the pixel of correspondence is compared one by one, determine original first pixel for the treatment of in the projected image, this first pixel is originally to treat in the projected image that the difference with the visual signature parameter value of actual environment changing image respective pixel surpasses the pixel of default visual signature parameter threshold;
After having obtained the first all pixels, whether the number of judging the first continuous pixel surpasses default number judgment threshold, if, can judge that then this first pixel is the pixel corresponding with the active user position, otherwise judge that this first pixel is not the pixel corresponding with the active user position.
At this, be that example relatively describes pixel below with the color contrast.
To actual environment changing image and original each pixel for the treatment of projected image obtain R, G, the B value (obtains pixel R, G, B value, can use the GetPixel function of API), compare respective pixel right R, G, the difference of B value then, whether the difference of judging the right R of this pixel, G, B value surpasses preset threshold value,, if then the number with first pixel adds 1, all pixels are right until relatively finishing, and obtain the number of first pixel.
2, block of pixels comparative approach
In first kind of above-mentioned mode, be that pixel is compared one by one, at pixel more for a long time, spended time is more, the processing requirements height, therefore, also a plurality of pixels can be divided into a block of pixels, and then utilize visual signature parameter (as brightness, color, contrast etc.) that the block of pixels of correspondence is compared, determine original first block of pixels for the treatment of in the projected image, this first block of pixels is originally to treat in the projected image that the difference with the visual signature parameter value of actual environment changing image respective pixel piece surpasses the block of pixels of default visual signature parameter threshold;
After having obtained the first all block of pixels, whether the number of judging the first continuous block of pixels surpasses default number judgment threshold, if, can judge that then this first block of pixels is the block of pixels corresponding with the active user position, otherwise judge that this first pixel is not the pixel corresponding with the active user position.
In the block of pixels comparative approach, can with each pixel R, G, B value in the block of pixels with value or block of pixels in R, G, the B mean value of pixel judge, at this, be not described in detail.
In above-mentioned judgment mode, be to judge with the number of the first continuous pixel/first block of pixels, certainly, also can further comprehensive length and width judge, perhaps the first continuous pixel/first block of pixels is formed the shape in zone and carry out, judge according to similarity with the humanoid shape of storage in advance.
After having carried out above-mentioned processing, the method for controlling projection of the embodiment of the invention and device can be eliminated and be incident upon people's light on the face.
But because the continuous motion of people in speech or hosting process, only utilize above-mentioned apparatus and method, after speaker or host position change, a plurality of black patches will appear in view field, as A1 time host in the B1 position, at this moment, the method for controlling projection of the embodiment of the invention and device promptly can be forbidden original treating in the projected image and the corresponding pixel in A2 position, and arrived the A2 time, the host is in the B2 position, at this moment, the method for controlling projection of the embodiment of the invention and device promptly can be forbidden original treating in the projected image and the corresponding pixel in B2 position, but original treating still is in the state of being under an embargo with the corresponding pixel in A2 position in the projected image, after the host moves repeatedly, whole projected image will be incoherent, therefore, and the existence that the method for controlling projection of the embodiment of the invention and device need address the above problem.
The device with projection control function of the embodiment of the invention also comprises:
Second user's locating module, what be used for that the comparison last time sends to that projector carries out projection treats projected image and current actual environment image, and determines original second corresponding with the active user position in the projected image pixel for the treatment of according to comparative result;
At this, it may be first to treat projected image that this last time sends to the projected image for the treatment of that projector carries out projection, also may be following second to treat projected image.
Since last send to projector carry out projection treat projected image and original treat projected image only just some pixel be under an embargo, therefore, relatively more last send to projector carry out projection treat projected image and current actual environment image after, can determine that the last time sends to the pixel corresponding with the active user position in the projected image for the treatment of that projector carries out projection, just originally treat pixel corresponding in the projected image with the active user position;
Second disabled module is used for forbidding original second pixel for the treatment of projected image, forms second and treats projected image;
Second sending module is used for treating that with second projected image sends to projector and throws.
Therefore, as shown in Figure 2, the method for the embodiment of the invention also comprises:
The computer of the embodiment of the invention comprises display, CPU, hard disk, also comprises the projection control device, and this projection control device comprises:
Photographing module is used to obtain the actual environment image of the formed projected area of projector projects; When the user was between projector and the projection screen, this actual environment image was the stack of projector projects image and user image;
First user's locating module is used for more original projected image and the actual environment image treated, and determines original first corresponding with the active user position in the projected image pixel for the treatment of according to comparative result;
First disabled module is used for forbidding original first pixel for the treatment of projected image, forms first and treats projected image;
First sending module is used for treating that with first projected image sends to projector and throws;
Second user's locating module, what be used for that the comparison last time sends to that projector carries out projection treats projected image and current actual environment image, and determines original second corresponding with the active user position in the projected image pixel for the treatment of according to comparative result;
Second disabled module is used for forbidding original second pixel for the treatment of projected image, forms second and treats projected image;
Second sending module is used for treating that with second projected image sends to projector and throws.
The projector of the embodiment of the invention comprises projection module, also comprises the projection control device, and this projection control device comprises:
The original projection image collection module is used to obtain the original projected image for the treatment of, at this, this original projected image for the treatment of is the digital picture from image supply device (as computing machine, digital camera etc.);
Photographing module is used to obtain the actual environment image of the formed projected area of projector projects; When the user was between projector and the projection screen, this actual environment image was the stack of projector projects image and user image;
First user's locating module is used for more original projected image and the actual environment image treated, and determines original first corresponding with the active user position in the projected image pixel for the treatment of according to comparative result;
First disabled module is used for forbidding original first pixel for the treatment of projected image, forms first and treats projected image;
First sending module is used for treating that with first projected image sends to projection module and throws.
Second user's locating module, what be used for that the comparison last time sends to that projector carries out projection treats projected image and current actual environment image, and determines original second corresponding with the active user position in the projected image pixel for the treatment of according to comparative result;
Second disabled module is used for forbidding original second pixel for the treatment of projected image, forms second and treats projected image;
Second sending module is used for treating that with second projected image sends to projection module and throws.
Through the above description of the embodiments, those skilled in the art can be well understood to the present invention and can realize by the mode that software adds necessary general hardware platform, can certainly pass through hardware, but obviously the former is better embodiment.Based on such understanding, the part that technical scheme of the present invention contributes to prior art in essence in other words can embody with the form of software product, this computer software product comprise some instructions with so that a computer equipment (said here computer equipment is a generalized concept, include but not limited to personal computer, server, the network equipment etc.) the described method of the execution embodiment of the invention.
The above only is a preferred implementation of the present invention; should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle of the invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (10)
1. the device with projection control function is characterized in that, comprising:
Image collection module is used to obtain the original actual environment image for the treatment of projected image and projector projects zone;
First user's locating module, be used for described actual environment image is handled, obtain and the described original actual environment changing image for the treatment of the projected image Matching Alignment, more described original treat projected image and with the described original actual environment image for the treatment of the projected image Matching Alignment, and determine described original all corresponding in the projected image first pixels for the treatment of with customer location according to comparative result;
First disabled module is used for forbidding described original all first pixels corresponding with customer location for the treatment of projected image, forms first and treats projected image;
First sending module is used for treating that with described first projected image sends to described projector and throws.
2. device according to claim 1 is characterized in that, described first user's locating module specifically comprises:
The Matching Alignment unit, be used for calculating affine transformation relationship according to the described original mated alignment features of projected image and described actual environment image for the treatment of, and handle described actual environment image according to described affine transformation relationship, obtain and the described original actual environment changing image for the treatment of the projected image Matching Alignment;
The contrast unit, more described actual environment changing image and the described original projected image for the treatment of are determined described original all corresponding with customer location in the projected image first pixels for the treatment of.
3. device according to claim 1 and 2 is characterized in that, also comprises:
Second user's locating module, what be used for that the comparison last time sends to that described projector carries out projection treats projected image and described actual environment image, and determines original all corresponding with the active user position in the projected image second pixels for the treatment of according to comparative result;
Second disabled module is used for forbidding described original all second pixels for the treatment of that the described of projected image is corresponding with the active user position, forms second and treats projected image;
Second sending module is used for treating that with described second projected image sends to described projector and throws.
4. device according to claim 3 is characterized in that, described first disabled module and described second disabled module are identical or different module; Described first sending module is a module identical or inequality with described second sending module.
5. a method for controlling projection is characterized in that, comprises step:
Obtain the original actual environment image for the treatment of projected image and projector projects zone;
Described actual environment image is handled, obtain and the described original actual environment changing image for the treatment of the projected image Matching Alignment, more described original treat projected image and with the described original actual environment image for the treatment of the projected image Matching Alignment, and determine described original all corresponding in the projected image first pixels for the treatment of with customer location according to comparative result;
Forbid described original all first pixels corresponding for the treatment of in the projected image, form first and treat projected image with customer location;
Throw described first and treat projected image.
6. method for controlling projection according to claim 5, it is characterized in that, described original projected image and the described actual environment image treated, and determine that according to comparative result the described original step of all corresponding with customer location in the projected image first pixels for the treatment of specifically comprises:
Calculate affine transformation relationship according to the described original mated alignment features of projected image and described actual environment image for the treatment of, and handle described actual environment image according to described affine transformation relationship, obtain and the described original actual environment changing image for the treatment of the projected image Matching Alignment;
More described actual environment changing image and the described original projected image for the treatment of are determined described original all corresponding with customer location in the projected image first pixels for the treatment of.
7. according to claim 5 or 6 described method for controlling projection, it is characterized in that, also comprise step:
Relatively more last send to that described projector carries out projection treat projected image and described actual environment image, and determine original all corresponding in the projected image second pixels for the treatment of with the active user position according to comparative result;
Forbid described original all second pixels corresponding for the treatment of in the projected image, form second and treat projected image with the active user position;
Throw described second and treat projected image.
8. a computer comprises display, CPU, hard disk, it is characterized in that, also comprises:
Image collection module is used to obtain the original actual environment image for the treatment of projected image and projector projects zone;
First user's locating module, be used for described actual environment image is handled, obtain and the described original actual environment changing image for the treatment of the projected image Matching Alignment, more described original treat projected image and with the described original actual environment image for the treatment of the projected image Matching Alignment, and determine described original all corresponding in the projected image first pixels for the treatment of with customer location according to comparative result;
First disabled module is used for forbidding described original all first pixels corresponding with customer location for the treatment of projected image, forms first and treats projected image;
First sending module is used for treating that with described first projected image sends to described projector and throws.
9. a projector comprises projection module, it is characterized in that, also comprises:
Image collection module is used to obtain the original actual environment image for the treatment of projected image and projector projects zone;
First user's locating module, be used for described actual environment image is handled, obtain and the described original actual environment changing image for the treatment of the projected image Matching Alignment, more described original treat projected image and with the described original actual environment image for the treatment of the projected image Matching Alignment, and determine described original all corresponding in the projected image first pixels for the treatment of with customer location according to comparative result;
First disabled module is used for forbidding described original all first pixels corresponding with customer location for the treatment of projected image, forms first and treats projected image;
First sending module is used for treating that with described first projected image sends to described projection module.
10. projector according to claim 9 is characterized in that, also comprises:
Second user's locating module, what be used for that the comparison last time sends to that described projector carries out projection treats projected image and described actual environment image, and determines original all corresponding with the active user position in the projected image second pixels for the treatment of according to comparative result;
Second disabled module is used for forbidding described original all second pixels corresponding with the active user position for the treatment of projected image, forms second and treats projected image;
Second sending module is used for treating that with described second projected image sends to described projection module.
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| CN102103259B (en) * | 2009-12-18 | 2012-11-21 | 深圳市巨龙科教高技术股份有限公司 | Device and method for preventing strong light irradiation of projector |
| 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 |
| CN104657973B (en) * | 2013-11-25 | 2018-12-14 | 联想(北京)有限公司 | A kind of image processing method, electronic equipment and control system |
| CN110968281B (en) * | 2018-09-30 | 2023-09-08 | 千寻位置网络有限公司 | Scene presentation method and device, execution terminal, center console and control system |
| 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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| US6137881A (en) * | 1997-02-28 | 2000-10-24 | Texas Instruments Incorporated | Adaptive filtering method and apparatus employing modified fast affine projection algorithm |
| CN1607740A (en) * | 2003-09-24 | 2005-04-20 | 卓联半导体股份有限公司 | Modified affine projection algorithm for non-stationary signal |
| CN1617009A (en) * | 2004-09-20 | 2005-05-18 | 深圳大学 | Three-dimensional digital imaging method based on space lattice projection |
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| US6137881A (en) * | 1997-02-28 | 2000-10-24 | Texas Instruments Incorporated | Adaptive filtering method and apparatus employing modified fast affine projection algorithm |
| CN1607740A (en) * | 2003-09-24 | 2005-04-20 | 卓联半导体股份有限公司 | Modified affine projection algorithm for non-stationary signal |
| CN1617009A (en) * | 2004-09-20 | 2005-05-18 | 深圳大学 | Three-dimensional digital imaging method based on space lattice projection |
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