CN106331665A - Projection image adjustment method and projector - Google Patents

Projection image adjustment method and projector Download PDF

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Publication number
CN106331665A
CN106331665A CN201510387029.4A CN201510387029A CN106331665A CN 106331665 A CN106331665 A CN 106331665A CN 201510387029 A CN201510387029 A CN 201510387029A CN 106331665 A CN106331665 A CN 106331665A
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China
Prior art keywords
parameter
image
projection
screen
difference
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Pending
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CN201510387029.4A
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Chinese (zh)
Inventor
唐金腾
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Yutou Technology Hangzhou Co Ltd
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Yutou Technology Hangzhou Co Ltd
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Priority to CN201510387029.4A priority Critical patent/CN106331665A/en
Priority to PCT/CN2016/086621 priority patent/WO2017000811A1/en
Priority to TW105120632A priority patent/TWI634792B/en
Publication of CN106331665A publication Critical patent/CN106331665A/en
Priority to HK17105105.2A priority patent/HK1231655A1/en
Pending legal-status Critical Current

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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00Details of television systems
    • H04N5/74Projection arrangements for image reproduction, e.g. using eidophor

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  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Projection Apparatus (AREA)
  • Controls And Circuits For Display Device (AREA)
  • Video Image Reproduction Devices For Color Tv Systems (AREA)

Abstract

The invention discloses a projection image adjustment method and a projector, and belongs to the technical field of image processing. The method comprises the following steps: step S1, collecting a screen image by an image sensor; step S2, comparing at least one image parameter of the screen image with the corresponding image parameter of an original image stored in the projector; step S3, judging a parameter difference between the image parameter of the screen image and the image parameter of the original image according to a comparison result, and logging out if the parameter difference is contained within a difference range; and step S4, adjusting the projection parameter associated with the projection of the original image in the projector according to the parameter difference, projecting the next frame of original image on the projection screen according to the adjusted projection parameter, and then returning to step S1. The above-mentioned technical scheme has the beneficial effects of eliminating the influence of the projection screen having a background color or different projection environments to the projection image, expanding the selection diversity of the projection screen and improving the enjoy experience of users.

Description

A kind of projection image adjustment method and projector
Technical field
The present invention relates to technical field of image processing, particularly relate to a kind of projection image adjustment method.
Background technology
In existing shadow casting technique, it usually needs projection screen is white, or the light color screen of broken white Curtain, so could ensure the quality of image of projection picture to greatest extent.If the projection screen selected is not white Color, such as screen are yellow, redness, green or other colors, or there is colored ambient lighting Impact, then projecting image on the projection screen may be affected by screen back scenery or ambient lighting And produce image fault, between image and original image that i.e. user is seen, distortion occurs, thus Reduce the experience of viewing and admiring of user, and limit the multiformity that projection screen selects simultaneously.
Summary of the invention
According to problems of the prior art, a kind of projection image adjustment method of existing offer and projector, Aim to solve the problem that in prior art, projection picture is affected and the problem of distortion by screen back scenery or ambient color.
Technique scheme specifically includes:
A kind of projection image adjustment method, wherein, installs an imageing sensor on projector, to obtain The screen picture of display on corresponding projection screen;
Described projection image adjustment method specifically includes:
Step S1, collects the described screen picture of present frame by described imageing sensor;
Step S2, by least one class image parameter of the described screen picture of present frame collected and institute The corresponding described image parameter stating the corresponding frame original image preserved in projector compares, and Output comparative result;
Step S3, according to described comparative result, it is judged that the described image parameter of described screen picture is with described Parameter difference between the described image parameter of original image:
If described parameter difference is included in a default difference range, then exit;
Step S4, projects described original image according to described parameter difference to being associated with in described projector Projective parameter is adjusted, and according to the described projective parameter being adjusted by original image described in next frame Project to, on the described projection screen of correspondence, be then returned to described step S1.
Preferably, this projection image adjustment method, wherein, the classification of described image parameter includes:
RGB color channel components parameter;And/or
Gamma curve parameter;And/or
Histogram parameter;And/or
Signal to noise ratio parameter;And/or
Color saturation parameter;And/or
Luminance parameter.
Preferably, this projection image adjustment method, wherein, in described step S3, according to correspondence at least The described parameter difference of image parameter described in one class judges, and according at least one described parameter corresponding Described projective parameter is adjusted by difference.
Preferably, this projection image adjustment method, wherein, respectively by described screen picture and described original The multiple equal-sized block of pixels of image division;
In described step S3, respectively to each described block of pixels of described screen picture that is associated with corresponding The described block of pixels being associated with described original image compare, to obtain corresponding each described block of pixels Described parameter difference and export;
Described step S4 specifically includes:
Step S41, according to described parameter difference, projects each described of described original image to being associated with The described projective parameter of block of pixels is adjusted;
Step S42, according to original image described in all described block of pixels split being adjusted and be projected in On described projection screen, it is then returned to described step S1.
Preferably, this projection image adjustment method, wherein, in described step S3, described default difference Value scope is 0;
In the most described step S3, it is judged that the described image parameter of described screen picture and described original image Described image parameter between parameter difference, and when described parameter difference is 0, directly exit.
Preferably, this projection image adjustment method, wherein, it is applied in digital light processing projection system.
A kind of projector, wherein, applies above-mentioned projection image adjustment method.
Technique scheme provides the benefit that: provide a kind of projection image adjustment method, it is possible to eliminate tool Have powerful connections the projection screen of color or the different projection environment impact on projection picture, extended projection screen The multiformity selected, promote user views and admires experience.
Accompanying drawing explanation
Fig. 1-2 is in the preferred embodiment of the present invention, the flow process signal of a kind of projection image adjustment method Figure.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out Clearly and completely describe, it is clear that described embodiment is only a part of embodiment of the present invention, and It is not all, of embodiment.Based on the embodiment in the present invention, those of ordinary skill in the art are not making The every other embodiment obtained on the premise of going out creative work, broadly falls into the scope of protection of the invention.
It should be noted that in the case of not conflicting, the embodiment in the present invention and the spy in embodiment Levy and can be mutually combined.
The invention will be further described with specific embodiment below in conjunction with the accompanying drawings, but not as the present invention's Limit.
Up-to-date shadow casting technique, i.e. Digital Light Processor (Digital Light Processor, DLP) projection Technology, is a kind of to be capable of the shadow casting technique that digital information shows.DLP shadow casting technique is micro-instead with numeral Emitter (Digital Micro-mirror Device, DMD) is as light valve image device, it is possible to make figure As tonal gradation reaches 256-1024 level, color kind reaches 2563-10243 kind, and has reflection Advantage so that total light efficiency of image device reaches 60% with first-class.But DLP shadow casting technique, including Cathode ray tube (Cathode Ray Tube, the CRT) shadow casting technique of tradition use and liquid crystal apparatus (Liquid Crystal Device, LCD) shadow casting techniques etc., are respectively provided with the restriction that projection screen selects, The light color screen of white or broken white i.e. must be selected as projection screen, and reduce colored as far as possible The ambient light impact on projection picture, could present to user on the projection screen and project more really Image.Above-mentioned restriction Producing reason is projector itself not have according to screen color and automatically changes throwing The ability of shadow image, does not accounts for screen color and/or ambient color to projection designing projector when Image produces the factor of impact, and therefore projector cannot be made for screen background color and/or ambient color in time Reaction.
In the preferred embodiment of the present invention, based on the above-mentioned problems in the prior art, now provide one Plant the technical scheme of projection image adjustment method.
In the preferred embodiment of the present invention, above-mentioned projection image adjustment method is applied to projector, before it Carry as arranging an imageing sensor on projector, show on the projection screen with the projection of acquired projections instrument Screen picture.Therefore, in the preferred embodiment of the present invention, imageing sensor towards with projecting lamp Towards unanimously, both face towards projection screen.
In the preferred embodiment of the present invention, above-mentioned imageing sensor, in gatherer process, will not change institute Gather the picture quality of image, i.e. project screen picture on the projection screen and collect with imageing sensor Screen picture consistent.
In the preferred embodiment of the present invention, as it is shown in figure 1, above-mentioned projection image adjustment method is specifically wrapped Include:
Step S1, collects the screen picture of present frame by imageing sensor;
In the preferred embodiment of the present invention, each frame screen picture is acquired by imageing sensor, and Send in time in projector.
Step S2, at least one class image parameter and the projector of the screen picture of present frame that will collect The corresponding image parameter of a corresponding frame original image of middle preservation compares, and exports comparative result;
In the preferred embodiment of the present invention, the classification of image parameter may include that
RGB color channel components parameter;And/or
Gamma curve parameter;And/or
Histogram parameter;And/or
Signal to noise ratio parameter;And/or
Color saturation parameter;And/or
Luminance parameter.
Wherein, RGB color channel components parameter can include that R channel components parameter, G channel components are joined Number and channel B component parameters.In follow-up parameter tuning process, can only judge and adjust R to lead to Road component parameters, and/or G channel components parameter, and/or channel B component parameters.
In other embodiments of the present invention, above-mentioned image parameter can include the most hereinbefore listing other The classification of picture quality can be characterized, do not repeat them here.
In the preferred embodiment of the present invention, so-called original image, refer to image generated in projector, Will project on the projection screen to form screen picture by original image.In the preferred embodiment of the present invention, Owing to the background colour of projection screen is not necessarily white, and projection environment bright is likely to as colour, therefore The picture quality of projection screen picture on the projection screen may be caused certain impact, the most above-mentioned Screen picture is the most identical with original image, then be associated with the image parameter of above-mentioned screen picture and associate May there is deviation between the corresponding image parameter of above-mentioned original image, this deviation is all reacted In comparative result.
In the preferred embodiment of the present invention, can only relatively one type as described above or several Class image parameter, the categorical measure of the image parameter that participation is compared can be to be solidificated in advance inside projector Processor in, it is also possible to by user according to different projection environment and/or different projection accuracy demands It is set obtaining.
Step S3, according to comparative result, it is judged that the image ginseng of the image parameter of screen picture and original image Parameter difference between number:
If parameter difference is included in a default difference range, then exit;
In the preferred embodiment of the present invention, so-called parameter difference, refer to corresponding to same class image parameter, The difference being associated with between the image parameter of screen picture and the image parameter being associated with original image.Such as, Corresponding to R channel components parameter, it is associated with the R channel components parameter of screen picture and is associated with original graph Difference between the R channel components parameter of picture.
In the preferred embodiment of the present invention, so-called difference range, refer to that a default user is permissible The image fault scope accepted, i.e. user naked eyes image fault inconspicuous scope.Specifically, if The parameter difference of a corresponding class image parameter falls into above-mentioned predetermined difference range, then be projected in projection screen On screen picture and the original image in projector between gap compare small, user passes through naked eyes It is difficult to differentiate.In the preferred embodiment of the present invention, above-mentioned difference range can be carried out according to the actual requirements Set.
In the preferred embodiment of the present invention, when parameter difference is included in above-mentioned default difference range, Then think now screen picture distortion level within the acceptable range, therefore without projective parameter is entered Row is corresponding to be adjusted, then can directly exit.
In one preferred embodiment of the present invention, above-mentioned difference range can be set as 0, then mean Only when difference parameter is 0, just think that the distortion level of screen picture is qualified, i.e. only work as screen map As the most directly exiting time identical with original image.
In the preferred embodiment of the present invention, in a comparison procedure, multiclass image parameter can be selected, Or the multiple image parameters in a class image parameter compare, such as:
1) RGB color channel components parameter can be selected, and color saturation parameter compares. Then final comparative result is the comparative result of RGB color channel components parameter and color saturation parameter Integrated value, is the most only being associated with the parameter difference of RGB color channel components parameter, and is being associated with When the parameter difference of color saturation parameter all falls within above-mentioned difference range, just think now need not into Row sum-equal matrix, and directly exit.
In one preferred embodiment of the present invention, a corresponding class image parameter, a difference can be set Scope, the most only all falls within the difference of correspondence in the parameter difference being associated with the image parameter that every class is compared In the range of time, just think and be now made without adjusting, and directly exit.
2) the R channel components parameter in RGB color channel components parameter and G passage can be selected to divide Amount parameter, is the most only being associated with the parameter difference of R channel components parameter, and is being associated with G passage The parameter difference of component parameters all fall within correspondence difference range in time, just think now be made without tune Whole, and directly exit.
In the preferred embodiment of the present invention, can be adjusted flexibly, according to practical situation, the image participating in comparing Subclass (the R in such as RGB color channel components parameter in the classification of parameter, and each classification Channel components parameter, and/or G channel components parameter, and/or channel B component parameters), thus meet The demand of different projection Adjustment precision.
Step S4, is carried out the projective parameter being associated with projection original image in projector according to parameter difference Adjust, and according to the projective parameter being adjusted, next frame original image is projected to the projection screen of correspondence On, it is then returned to step S1.
In the preferred embodiment of the present invention, in above-mentioned steps S4, comparing R channel components parameter it is According to parameter difference analysis, example, if showing that the R channel components parameter that is associated with of screen picture is more than original graph Picture be associated with R channel components parameter, then after explanation original image projects on screen picture, R leads to Road component parameters increases, and (reduction is associated with the projective parameter the most now needing to reduce in projector accordingly The gain of the projective parameter of R channel parameters component);Otherwise, need the corresponding projection improved in projector The parameter gain of projective parameter of R channel parameters component (raising be associated with).
Correspondingly, in the preferred embodiment of the present invention, if to multiclass or the image parameter of multiple subclass Compare, then for different parameter difference, corresponding projective parameter is adjusted simultaneously.
In the preferred embodiment of the present invention, projector is according to the projective parameter being adjusted, to projection screen Curtain projection next frame image, and return step S1, to continue the image fault degree of monitoring screen image, Until image fault degree meets demand.
In one preferred embodiment of the present invention, in order to promote the precision of projection Image Adjusting, for screen Curtain image and original image, be respectively divided multiple equal-sized block of pixels, such as, divide in units of 1*1 Screen picture and original image are not divided into and include multiple block of pixels.Subsequently, in above-mentioned steps S3, Respectively each block of pixels being associated with screen picture is carried out with the corresponding block of pixels being associated with original image Relatively, to obtain the parameter difference of corresponding each block of pixels and to export.In other words, each block of pixels is worked as Make an independent image frame to carry out independently comparing, and export the parameter difference of corresponding each block of pixels.
Therefore, in the preferred embodiment of the present invention, as in figure 2 it is shown, above-mentioned steps S4 specifically includes:
Step S41, according to parameter difference, the projection to each block of pixels being associated with projection original image Parameter is adjusted;
Step S42, according to all block of pixels split original images being adjusted and be projected in projection screen On, it is then returned to step S1.
I.e. in the preferred embodiment of the present invention, according to the lifting of Image Adjusting accuracy requirement, will be the most whole The process evolution that width image compares for divide an image into one by one small pixel block and respectively than Relatively, thus the Adjustment precision of image is substantially improved.
In the preferred embodiment of the present invention, can Image Adjusting precision according to demand, determine at a width The quantity of the block of pixels divided on image.
In the preferred embodiment of the present invention, the method for above-mentioned division block of pixels can be tackled a projection There is on screen the situation of multiple background colour, and/or under there is the projection environment of ambient light of multiple color Ensure the picture quality of the image of projection.
In sum, in technical solution of the present invention, gather the screen picture of currently playing frame, and by its with The original image of the respective frame in projector compares, to obtain the parameter between corresponding image parameter Difference.According to parameter difference, projective parameter corresponding in projector is adjusted, and employing is adjusted After projective parameter continue to projection screen project next frame image, and simultaneously continue monitoring next frame screen The image fault degree of image.Said process moves in circles, until the image fault of a certain frame screen picture Till degree meets demand (parameter difference falls in difference range).Technique scheme can make up existing There is the problem that cannot change image displaying quality for different projection environment in technology, it is possible to extended projection The multiformity that screen selects, promotes the stability of the picture quality of projection picture, thus promotes user View and admire experience.
In the preferred embodiment of the present invention, above-mentioned projection image adjustment method goes for above-mentioned DLP In optical projection system.Similarly, in other embodiments of the present invention, above-mentioned projection image adjustment method also may be used Be applicable to other optical projection systems such as CRT optical projection system or LCD optical projection system.
In the preferred embodiment of the present invention, also provide for a kind of projector, wherein use above-mentioned projection picture Method of adjustment.
The foregoing is only preferred embodiment of the present invention, not thereby limit embodiments of the present invention and Protection domain, to those skilled in the art, it should can appreciate that all utilization description of the invention And the equivalent done by diagramatic content and the scheme obtained by obvious change, all should comprise Within the scope of the present invention.

Claims (7)

1. a projection image adjustment method, it is characterised in that install an imageing sensor on projector, To obtain the screen picture of display on corresponding projection screen;
Described projection image adjustment method specifically includes:
Step S1, collects the described screen picture of present frame by described imageing sensor;
Step S2, by least one class image parameter of the described screen picture of present frame collected and institute The corresponding described image parameter stating the corresponding frame original image preserved in projector compares, and Output comparative result;
Step S3, according to described comparative result, it is judged that the described image parameter of described screen picture is with described Parameter difference between the described image parameter of original image:
If described parameter difference is included in a default difference range, then exit;
Step S4, projects described original image according to described parameter difference to being associated with in described projector Projective parameter is adjusted, and according to the described projective parameter being adjusted by original image described in next frame Project to, on the described projection screen of correspondence, be then returned to described step S1.
2. projection image adjustment method as claimed in claim 1, it is characterised in that described image parameter Classification include:
RGB color channel components parameter;And/or
Gamma curve parameter;And/or
Histogram parameter;And/or
Signal to noise ratio parameter;And/or
Color saturation parameter;And/or
Luminance parameter.
3. projection image adjustment method as claimed in claim 1, it is characterised in that described step S3 In, judge according to the described parameter difference of image parameter described in a correspondence at least class, and according to correspondence Described projective parameter is adjusted by least one described parameter difference.
4. projection image adjustment method as claimed in claim 1, it is characterised in that respectively by described screen Curtain image and described original image divide multiple equal-sized block of pixels;
In described step S3, respectively to each described block of pixels of described screen picture that is associated with corresponding The described block of pixels being associated with described original image compare, to obtain corresponding each described block of pixels Described parameter difference and export;
Described step S4 specifically includes:
Step S41, according to described parameter difference, projects each described of described original image to being associated with The described projective parameter of block of pixels is adjusted;
Step S42, according to original image described in all described block of pixels split being adjusted and be projected in On described projection screen, it is then returned to described step S1.
5. projection image adjustment method as claimed in claim 1, it is characterised in that described step S3 In, described default difference range is 0;
In the most described step S3, it is judged that the described image parameter of described screen picture and described original image Described image parameter between parameter difference, and when described parameter difference is 0, directly exit.
6. projection image adjustment method as claimed in claim 1, it is characterised in that be applied to digital light Process in optical projection system.
7. a projector, it is characterised in that application projection Image Adjusting as described in claim 1-6 Method.
CN201510387029.4A 2015-06-30 2015-06-30 Projection image adjustment method and projector Pending CN106331665A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
CN201510387029.4A CN106331665A (en) 2015-06-30 2015-06-30 Projection image adjustment method and projector
PCT/CN2016/086621 WO2017000811A1 (en) 2015-06-30 2016-06-21 Method for adjusting projected image and projector
TW105120632A TWI634792B (en) 2015-06-30 2016-06-29 Projection image adjustment method and a projector
HK17105105.2A HK1231655A1 (en) 2015-06-30 2017-05-19 A projection image adjustment method and a projector

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HK (1) HK1231655A1 (en)
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CN107257453A (en) * 2017-07-12 2017-10-17 上海斐讯数据通信技术有限公司 The color calibration method and system of a kind of projected image
CN107659802A (en) * 2017-11-10 2018-02-02 范永浩 Outdoor projection instrument
CN109192158A (en) * 2018-09-21 2019-01-11 重庆惠科金渝光电科技有限公司 Control method, display panel and the storage medium of display panel
CN109831658A (en) * 2019-04-03 2019-05-31 贵安新区新特电动汽车工业有限公司 Projected light tone adjusting method and projected light tone engagement positions
CN113938568A (en) * 2020-06-29 2022-01-14 先临三维科技股份有限公司 Scanner adjusting method and device, processor and scanning system

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CN107659802A (en) * 2017-11-10 2018-02-02 范永浩 Outdoor projection instrument
CN109192158A (en) * 2018-09-21 2019-01-11 重庆惠科金渝光电科技有限公司 Control method, display panel and the storage medium of display panel
CN109831658A (en) * 2019-04-03 2019-05-31 贵安新区新特电动汽车工业有限公司 Projected light tone adjusting method and projected light tone engagement positions
CN113938568A (en) * 2020-06-29 2022-01-14 先临三维科技股份有限公司 Scanner adjusting method and device, processor and scanning system

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TW201701654A (en) 2017-01-01
WO2017000811A1 (en) 2017-01-05
TWI634792B (en) 2018-09-01

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