CN106331665A - Projection image adjustment method and projector - Google Patents
Projection image adjustment method and projector Download PDFInfo
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- 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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- 238000000034 method Methods 0.000 title claims abstract description 48
- 230000000052 comparative effect Effects 0.000 claims description 9
- 230000003287 optical effect Effects 0.000 claims description 5
- 230000009286 beneficial effect Effects 0.000 abstract 1
- 238000005266 casting Methods 0.000 description 7
- 230000008901 benefit Effects 0.000 description 2
- 239000004973 liquid crystal related substance Substances 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 241000208340 Araliaceae Species 0.000 description 1
- 241000196324 Embryophyta Species 0.000 description 1
- 235000005035 Panax pseudoginseng ssp. pseudoginseng Nutrition 0.000 description 1
- 235000003140 Panax quinquefolius Nutrition 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 235000008434 ginseng Nutrition 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/74—Projection 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
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.
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 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510387029.4A CN106331665A (en) | 2015-06-30 | 2015-06-30 | Projection image adjustment method and projector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106331665A true CN106331665A (en) | 2017-01-11 |
Family
ID=57607837
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510387029.4A Pending CN106331665A (en) | 2015-06-30 | 2015-06-30 | Projection image adjustment method and projector |
Country Status (4)
| Country | Link |
|---|---|
| CN (1) | CN106331665A (en) |
| HK (1) | HK1231655A1 (en) |
| TW (1) | TWI634792B (en) |
| WO (1) | WO2017000811A1 (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 of display panel, display panel and storage medium |
| 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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- 2016-06-29 TW TW105120632A patent/TWI634792B/en not_active IP Right Cessation
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| Publication number | Priority date | Publication date | Assignee | Title |
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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 of display panel, display panel and storage medium |
| 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 |
Also Published As
| Publication number | Publication date |
|---|---|
| TW201701654A (en) | 2017-01-01 |
| TWI634792B (en) | 2018-09-01 |
| HK1231655A1 (en) | 2017-12-22 |
| WO2017000811A1 (en) | 2017-01-05 |
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