CN102025893A - Projection picture light reflection compensating method and projection device - Google Patents
Projection picture light reflection compensating method and projection device Download PDFInfo
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- CN102025893A CN102025893A CN2009101690840A CN200910169084A CN102025893A CN 102025893 A CN102025893 A CN 102025893A CN 2009101690840 A CN2009101690840 A CN 2009101690840A CN 200910169084 A CN200910169084 A CN 200910169084A CN 102025893 A CN102025893 A CN 102025893A
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Abstract
The invention provides a projection picture light reflection compensating method and a projection device. The projection picture light reflection compensating method comprises that: the projection device projects a preset picture, detects the spectrum of the light reflected by the preset picture, compares the spectrum of the reflected light and the original spectrum of the preset picture and regulates the light characteristic value of the projected preset picture to compensate for the difference between the detected spectrum of the reflected light and the original spectrum.
Description
Technical field
The present invention relates to a kind of smooth compensation method and device, and be particularly related to a kind of light reflection compensation method and projection arrangement of projected picture.
Background technology
Along with the development of projection display technique, optical projection system and equipment have the development of highly significant within recent years.The principle of projector and transparency or lantern slide are similar, and the bulb that all is to use a high brightness is as light source, and picture is projected on white cloth curtain or the wall.With regard to know-why, projector on the market can be divided into negative electrode iconoscope (CRT) projector, high temperature polysilicon (Polysilicon) penetrating LCD (generally being referred to as liquid crystal projector) at present, and digital light processor (Digital Light Processing, DLP) three major types such as projector.
Wherein, liquid crystal projector can be done quite compactly, adds all images and is all cast out by same camera lens, need not polymer images, and therefore more traditional projector has the characteristic that is easy to carry, easily adjusts, and also becomes main flow in the market.In addition, the brain that more projector can be Connected Power when utilizing projector to do bulletin, training course, and the image on the computer is directly projected on the screen, saved the inconvenience of making transparency, also allow office more push forward with no paper at all.
Yet with the use of existing projector, desirable situation is the total reflection cloth curtain that projected picture is incident upon white, and will around light source close or cover.But actual situation is, projected picture can be subjected to the influence of various light evils (for example sight lamp) on every side and cause contrast to descend and the skew of whole colour temperature, when if the background of projection is not white cloth curtain or wall, then the light absorption reflectivity of background also can cause the contrast of picture to descend and hue shift.Therefore, be necessary to develop and a kind ofly can adjust the projection arrangement of projected picture quality in good time, and allow the user can obtain best ornamental quality according to environmental change,
Summary of the invention
In view of this, the invention provides a kind of light reflection compensation method of projected picture, by the default picture of projection, and with the spectrum comparison of its catoptrical spectrum and default picture carrying out adaptive adjustment, and can realize the light reflection compensation of projected picture.
The invention provides a kind of projection arrangement, by watch the projected picture place OPTICAL SENSORS to be set the user with the light of detecting by the projected picture reflection, with brightness, contrast and the saturation of adjusting projected picture adaptively, and can allow the user watch the projected picture of more pressing close to original quality.
The present invention proposes a kind of light reflection compensation method of projected picture, be applicable to projection arrangement, the method projection earlier one default picture, and the catoptrical spectrum that the default thus picture of detecting is reflected, original spectrum with this reverberation spectrum and default picture compares then, adjust the light characteristic value of the default picture that throws according to this, and the difference between compensatory reflex light spectrum and original spectrum.
On the other hand, the invention provides a kind of projection arrangement, it comprises projecting cell, OPTICAL SENSORS and processing unit; Wherein, projecting cell is in order to throw default picture; OPTICAL SENSORS is throwed the catoptrical spectrum of default picture reflection by projecting cell in order to detecting; Processing unit compares in order to the original spectrum with reverberation spectrum and default picture, adjusts the light characteristic value of the default picture that throws according to this, and the difference between compensatory reflex light spectrum and original spectrum.
Based on above-mentioned, the light reflection compensation method of projected picture of the present invention and projection arrangement are by the multiple default picture of projection, and the light that utilizes the OPTICAL SENSORS detecting to reflect by default picture, and the difference between the spectrum of reverberation spectrum that analysis is detected and default picture, with the light characteristic value of the default picture of accommodation institute projection, therefore can in different environment, provide the user identical picture quality.
For above-mentioned feature and advantage of the present invention can be become apparent, below especially exemplified by embodiment, and conjunction with figs. is described in detail below.
Description of drawings
Fig. 1 is the calcspar of projection arrangement of the projected picture of one embodiment of the invention.
Fig. 2 is the flow chart of light reflection compensation method of the projected picture of one embodiment of the invention.
Fig. 3 a and Fig. 3 b are the examples of light reflection compensation method of the projected picture of one embodiment of the invention.
Fig. 4 is the method flow diagram of the adjustment projected picture contrast of one embodiment of the invention.
Fig. 5 is the method flow diagram of the adjustment projected picture saturation of one embodiment of the invention.
The primary clustering symbol description:
Projection arrangement-100; Projecting cell-110;
OPTICAL SENSORS-120; Processing unit-130;
Light characteristic value calculating module-132; Comparison module-134;
Adjusting module-136;
Each the step-S210～S238 of the light reflection compensation method of the projected picture of one embodiment of the invention;
Each the step-S402～S412 of the contrast of default picture is throwed in the adjustment of one embodiment of the invention;
Each the step-S502～S508 of the saturation of default picture is throwed in the adjustment of one embodiment of the invention.
Embodiment
In order to allow the user obtain preferable ornamental quality, the present invention is placed on OPTICAL SENSORS around projection arrangement or the user, with the catoptrical spectrum of detecting user's projected picture that eyes are touched, analyze present light evil degree, projection background according to this to the absorption reflectivity of light etc., and analysis result informed projection arrangement, so that carry out corresponding output correction, make finally the reverberation spectrum that receives by OPTICAL SENSORS can be as far as possible near the quality of raw frames.In order to make content of the present invention more clear, below the example that can implement according to this really as the present invention especially exemplified by embodiment.
Fig. 1 is the calcspar of projection arrangement of the projected picture of one embodiment of the invention.Please refer to Fig. 1, the projection arrangement 100 of present embodiment comprises projecting cell 110, OPTICAL SENSORS 120 and processing unit 130, it for example is negative electrode iconoscope (CRT) projector, high temperature polysilicon (Polysilicon) penetrating LCD (generally being referred to as liquid crystal projector) or digital light processor (DigitalLight Processing, DLP) device such as projector, and can carry out the light reflection compensation for the picture of its projection.
Fig. 2 is the flow chart of light reflection compensation method of the projected picture of one embodiment of the invention.Please be simultaneously with reference to Fig. 1 and Fig. 2, the compensation method of present embodiment is applicable to the projection arrangement 100 of Fig. 1, and descends or the colour temperature skew in order to the contrast that compensation is harmful because of light or the change of projection background is caused, its detailed step is as follows:
At first, by the default picture (step S210) of projecting cell 110 projections.Wherein, projecting cell 110 can be by pure white picture, pure red picture, pure green picture or the ethereal blue picture of projection more than one or one, with the step of the light reflection compensation of carrying out following projected picture.
Then, throwed the catoptrical spectrum (step S220) of default picture reflection by projecting cell 110 by OPTICAL SENSORS 120 detectings.Wherein, OPTICAL SENSORS 120 for example is that light in order to the default picture reflection of being throwed by projecting cell 110 around the detecting projection arrangement 100 is to obtain its spectrum.In addition, OPTICAL SENSORS 120 also can be configured on user's remote controller by the side of or be placed on the object of an ad-hoc location around the user, and in order to throw the catoptrical spectrum that default picture reflects by projecting cell 110 around the detecting user.Wherein, the distance between above-mentioned ad-hoc location and user position is less than a predeterminable range (for example 1 meter), and the sense of reality that the reverberation spectrum that OPTICAL SENSORS 120 is detected is more pressed close to user's eyes.In other words, projecting cell 110 and OPTICAL SENSORS 120 can be separately positioned on distance one user's diverse location place, and carry out projection and light sensing function under distance user diverse location, and OPTICAL SENSORS 120 can be arranged on the position more approaching apart from the user.
Need to prove, after OPTICAL SENSORS 120 detects reverberation spectrum, present embodiment also can be back to projection arrangement 100 by remote controller or other transmitting device (not illustrating) transmission meanss that the reverberation spectrum transmitting of being detected is wired or wireless that is connected with OPTICAL SENSORS 120, uses and carries out subsequent analysis processing.Above-mentioned wireless transmission method for example comprises modes such as radio, bluetooth or infrared ray, and present embodiment does not limit its scope.
After obtaining reverberation spectrum, the reverberation spectrum that processing unit 130 can be detected OPTICAL SENSORS 120 and the original spectrum of default picture are relatively, adjust the light characteristic value of the default picture that is throwed according to this, and the difference between compensatory reflex light spectrum and original spectrum (step S230).Wherein, the original spectrum of described default picture for example is that projecting cell 110 throws under a full dark situation when presetting picture, by the catoptrical spectrum of OPTICAL SENSORS 120 detects by default picture reflection.
In detail, above-mentioned processing unit 130 for example comprises light characteristic value calculating module 132, comparison module 134 and adjusting module 136, above-mentioned steps S230 then can be subdivided into following a plurality of substep again: projection arrangement 100 for example is earlier to calculate (the luminous intensity for example of certain light characteristic value between the original spectrum of reverberation spectrum and default picture by light characteristic value calculating module 132, colourity, contrast or saturation) difference (step S232), then by comparison module 134 this difference and a threshold value are compared again, to judge whether this difference surpasses threshold value (step S234), and when this difference surpasses threshold value, can adjust the light characteristic value of the default picture that throws by adjusting module 136, with the difference (step S236) of this light characteristic value between the original spectrum of compensatory reflex light spectrum and default picture; Otherwise when this difference does not surpass threshold value, adjusting module 136 will can not be adjusted the light characteristic value (step S238) that projecting cell 110 throws default picture.
Need to prove, the reverberation spectrum that projection arrangement 100 can be measured OPTICAL SENSORS 120 with should default picture under good environment during (unglazed evil and be incident upon total reflection cloth curtain) projection by OPTICAL SENSORS 120 measurements to reverberation spectrum compare, with the light intensity decays situation that analyzes each color, the drift condition of colourity and the damage of contrast etc.Can carry out the adjustment strategy of predefined according to this analysis result afterwards, and make the loss of picture quality drop to minimum.At the attenuation of above-mentioned luminous intensity, colourity, contrast and saturation, the present invention disposes corresponding adjustment instrument respectively to carry out corresponding adjustment strategy in projection arrangement 100, use the light reflection compensation of realizing projected picture.Described adjustment instrument comprises that instrument is adjusted in brightness, colourity is adjusted instrument, contrast adjustment instrument and saturation and adjusted instrument, describes in detail for embodiment respectively with next.
At the adjustment of brightness, the present invention is by the light source power of brightness adjustment instrument adjustment projecting cell 110, and the brightness of the default picture that change projecting cell 110 is throwed, to compensate the luminance difference between above-mentioned reverberation spectrum and the original spectrum.Wherein, described light source for example is bulb or other lamp sources, and above-mentioned adjustment for light source power comprises the luminous intensity of adjusting a plurality of colour light sources simultaneously, makes that the reverberation spectrum that is finally recorded by OPTICAL SENSORS 120 can be near original spectrum.
At the adjustment of colourity, the present invention is by the gain of colourity adjustment instrument adjustment a plurality of color components that projection arrangement throws, and with the colourity of picture that balance is throwed, described color component comprises redness, blueness and green component etc., and does not limit its scope.
For instance, Fig. 3 a and Fig. 3 b are the examples of light reflection compensation method of the projected picture of one embodiment of the invention.Present embodiment uses a non-total reflection, nattier blue wall as the projection reflecting surface.Wherein, the projecting cell 110 of Fig. 3 a throws the original spectrum of default picture, and the projecting cell 110 of Fig. 3 b will be preset image projection when above-mentioned projection reflecting surface, the reverberation spectrum that OPTICAL SENSORS 120 is measured.If the spectrum of Fig. 3 b and the original spectrum comparison of Fig. 3 a can be found that catoptrical brightness obviously descends, and the tone of whole picture can be partial to blue color.At this defective, the brightness (arrow as shown in Fig. 3 b) that present embodiment improves picture integral body by the power output that strengthens projecting cell 110 bulbs; Simultaneously also can be by drawing high the gain ratio of red rifle a little, and make Red in the reverberation reach state than balance.
At the adjustment of contrast, the present invention adjusts the contrast that projecting cell 110 throws default picture by contrast adjustment instrument, to compensate the contrast difference between above-mentioned reverberation spectrum and the original spectrum.For instance, Fig. 4 is the method flow diagram of the adjustment projected picture contrast of one embodiment of the invention.Please refer to Fig. 4, present embodiment throws complete white picture and complete black picture respectively by contrast adjustment instrument control projecting cell 110, and the reverberation of complete thus white picture of control OPTICAL SENSORS 120 detectings and complete black picture reflection, and obtain first spectrum and second spectrum (step S402).
Then, add up the light intensity value of each frequency in this first spectrum and second spectrum respectively by contrast adjustment instrument control light characteristic value calculating module 132, and obtain first intensity level and second intensity level (step S404), and then the ratio that calculates this first intensity level and second intensity level is with as with reference to contrast (step S406).Then control comparison module 134 afterwards with reference to contrast and one contrast threshold value relatively, judge with reference to contrast whether be lower than contrast threshold value (step S408) according to this this, and the whether adjustment of degree of comparing of decision.
When the reference contrast was lower than the contrast threshold value, contrast is adjusted instrument promptly can control the spectrum that projecting cell 110 is adjusted the picture that throws, the contrast (step S410) of being throwed picture to draw high; Otherwise then do not adjust (step S412).By said method, projection arrangement 100 can maintain the contrast of its picture that throws on certain ratio, and then reaches the purpose of control contrast.
At the adjustment of saturation, the present invention adjusts the saturation that projecting cell 110 throws default picture by saturation adjustment instrument, with the compensation catoptrical saturation of being detected.For instance, Fig. 5 is the method flow diagram of the adjustment projected picture saturation of one embodiment of the invention.Please refer to Fig. 5, redness, green and blueness (RGB) color space that present embodiment is detected OPTICAL SENSORS 120 in the catoptrical spectrum by saturation adjustment instrument control light characteristic value calculating module 132 is converted to colourity, saturation and brightness (HSV) color space (step S502), then control again comparison module 134 get wherein the saturation color space and saturation threshold value relatively, whether be lower than saturation threshold value (step S504) to judge the saturation color space.
Wherein, when judging that the saturation color space is lower than the saturation threshold value, saturation is adjusted instrument and promptly the scope of the saturation color space of projecting cell 110 picture that throws outwards can be expanded, and is throwed the saturation (step S506) of picture to draw high; Otherwise then do not adjust (step S508).In detail, above-mentioned colourity, saturation and brightness and color space can be represented that wherein the rounded bottom surface of cone is equivalent to colourity by the cone of a three-dimensional, and saturation increases to the edge from the center of circle, and brightness is then successively decreased to the vertex of a cone from the base.Therefore, the scope of saturation color space can be increased the saturation of picture by the outside expansion in center.
By above-mentioned adjustment strategy, projection arrangement 100 can be at any time in response to the variation of context, in time adjust brightness, colourity, contrast and the saturation of projecting cell 110 picture that throws, and allow the received reverberation spectrum of OPTICAL SENSORS 120 (or user's eyes) can be as far as possible near the raw frames quality.
In sum, the light reflection compensation method of projected picture of the present invention and device are by the original spectrum comparison with the catoptrical spectrum of projected picture and this picture, and analyze light intensity decays situation, the chroma offset situation of each color and contrast damage etc., and adjust the light characteristic value of projected picture adaptively, therefore the loss of picture quality can be dropped to minimum.In addition, the present invention also by building remote controller in the OPTICAL SENSORS in or be placed on around the user, therefore can allow the user obtain best ornamental quality.
It should be noted that at last: above embodiment only in order to technical scheme of the present invention to be described, is not intended to limit; Although with reference to previous embodiment the present invention is had been described in detail, those of ordinary skill in the art is to be understood that: it still can be made amendment to the technical scheme that aforementioned each embodiment put down in writing, and perhaps part technical characterictic wherein is equal to replacement; And these modifications or replacement do not make the essence of appropriate technical solution break away from the spirit and scope of various embodiments of the present invention technical scheme.
Claims (15)
1. the light reflection compensation method of a projected picture is applicable to a projection arrangement, and this method comprises the following steps:
Projection one default picture;
Detecting is by the projection reverberation spectrum that this default picture reflected; And
Relatively an original spectrum of this reverberation spectrum and this default picture is adjusted a smooth characteristic value of this default picture that throws according to this, and compensates the difference between this reverberation spectrum and this original spectrum.
2. the light reflection compensation method of projected picture according to claim 1, wherein this default picture of this projection and this step of detecting this reverberation spectrum are carried out in distance one user's diverse location place, and the step of this this reverberation spectrum of detecting is performed in the position near this user.
3. the light reflection compensation method of projected picture according to claim 1, wherein relatively this reverberation spectrum and this original spectrum that should default picture, adjust this light characteristic value of this default picture that throws according to this, and the step that compensates this difference between this reverberation spectrum and this original spectrum comprises:
Calculate this reverberation spectrum and should this original spectrum of default picture between a difference of this light characteristic value;
Judge whether this difference surpasses a threshold value; And
When this difference surpasses this threshold value, adjust this light characteristic value of this default picture that throws, with this difference of this light characteristic value between this original spectrum that compensates this reverberation spectrum and this default picture.
4. the light reflection compensation method of projected picture according to claim 1 is wherein adjusted this light characteristic value of this default picture that throws, and the step that compensates this difference between this reverberation spectrum and this original spectrum comprises:
Adjust a light source power of this projection arrangement and change the brightness that to preset picture of being throwed, to compensate the luminance difference between this reverberation spectrum and this original spectrum.
5. the light reflection compensation method of projected picture according to claim 1 is wherein adjusted this light characteristic value of this default picture that throws, and the step that compensates this difference between this reverberation spectrum and this original spectrum comprises:
Adjust the gain of a plurality of color components of this default picture that this projection arrangement throws, with a colourity of this default picture that balance is throwed.
6. the light reflection compensation method of projected picture according to claim 1 is wherein adjusted this light characteristic value of this default picture that throws, and the step that compensates this difference between this reverberation spectrum and this original spectrum comprises:
Adjust a contrast of this default picture that throws, to compensate the contrast difference between this reverberation spectrum and this original spectrum.
7. the light reflection compensation method of projected picture according to claim 6 is wherein adjusted this contrast of this default picture that throws, and the step that compensates this difference between this reverberation spectrum and this original spectrum comprises:
Throw a complete white picture and a complete black picture respectively, and detect the reverberation that reflects by this complete white picture of throw and this entirely black picture, and obtain one first spectrum and one second spectrum;
Add up the light intensity value of a plurality of frequencies in this first spectrum and this second spectrum respectively, and obtain one first intensity level and one second intensity level;
The ratio that calculates this first intensity level and this second intensity level is with as one with reference to contrast, and should be with reference to contrast and a contrast threshold value relatively; And
When this is lower than this contrast threshold value with reference to contrast, adjust the spectrum of the picture that throws, the contrast of being throwed picture to draw high.
8. the light reflection compensation method of projected picture according to claim 1 is wherein adjusted this light characteristic value of this default picture that throws, and the step that compensates this difference between this reverberation spectrum and this original spectrum comprises:
Adjust a saturation of this default picture that throws, to compensate the saturation difference between this reverberation spectrum and this original spectrum.
9. the light reflection compensation method of projected picture according to claim 8 is wherein adjusted this saturation of this default picture that throws, and the step that compensates this difference between this reverberation spectrum and this original spectrum comprises:
A redness, green and blue color space that conversion is received in this reverberation spectrum are a colourity, saturation and brightness and color space;
Judge whether this saturation color space is lower than a saturation threshold value; And
When this saturation color space is lower than this saturation threshold value, outwards expand the scope of this saturation color space of the picture that throws, the saturation of being throwed picture to draw high.
10. projection arrangement comprises:
One projecting cell, projection one default picture;
One OPTICAL SENSORS, detecting should be preset the reverberation spectrum that picture reflects by what this projecting cell throwed; And
One processing unit, relatively an original spectrum of this reverberation spectrum and this default picture is adjusted a smooth characteristic value of this default picture that throws according to this, and compensates the difference between this reverberation spectrum and this original spectrum.
11. projection arrangement according to claim 10, wherein this processing unit comprises:
One smooth characteristic value calculating module, calculate this reverberation spectrum and should this original spectrum of default picture between a difference of this light characteristic value;
One comparison module, relatively this difference and a threshold value; And
One adjusting module when this comparison module judges that this difference surpasses this threshold value, is adjusted this light characteristic value of this default picture that this projecting cell throws, with this difference of this light characteristic value between this original spectrum that compensates this reverberation spectrum and this default picture.
12. projection arrangement according to claim 11, wherein this adjusting module comprises:
Instrument is adjusted in one brightness, adjust a light source power of this projecting cell and change throwed should default picture a brightness, to compensate the luminance difference between this reverberation spectrum and this original spectrum.
13. projection arrangement according to claim 11, wherein this adjusting module comprises:
One colourity is adjusted instrument, and the gain of a plurality of color components when adjusting this projecting cell and throwing this default picture is with a colourity of this default picture that balance is throwed.
14. projection arrangement according to claim 11, wherein this adjusting module comprises:
One contrast is adjusted instrument, adjusts a contrast of this default picture that throws, to compensate the contrast difference between this reverberation spectrum and this original spectrum.
15. projection arrangement according to claim 11, wherein this adjusting module comprises:
One saturation is adjusted instrument, adjusts a saturation of this default picture that this projecting cell throws, to compensate the saturation difference between this reverberation spectrum and this original spectrum.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2009101690840A CN102025893A (en) | 2009-09-21 | 2009-09-21 | Projection picture light reflection compensating method and projection device |
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| CN2009101690840A CN102025893A (en) | 2009-09-21 | 2009-09-21 | Projection picture light reflection compensating method and projection device |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104318912A (en) * | 2014-10-23 | 2015-01-28 | 赵辉 | Method and device for detecting environmental light brightness |
| CN104410803A (en) * | 2014-09-28 | 2015-03-11 | 联想(北京)有限公司 | Information processing method and electronic equipment |
| TWI549516B (en) * | 2014-10-03 | 2016-09-11 | 宏碁股份有限公司 | Electronic device and method for projecting screen adjustment |
| CN111051963A (en) * | 2016-07-01 | 2020-04-21 | 倾斜五股份有限公司 | Head-mounted projection display with multi-layer beam splitter and color correction |
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2009
- 2009-09-21 CN CN2009101690840A patent/CN102025893A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104410803A (en) * | 2014-09-28 | 2015-03-11 | 联想(北京)有限公司 | Information processing method and electronic equipment |
| TWI549516B (en) * | 2014-10-03 | 2016-09-11 | 宏碁股份有限公司 | Electronic device and method for projecting screen adjustment |
| US9769441B2 (en) | 2014-10-03 | 2017-09-19 | Acer Incorporated | Electronic device and method for adjusting setting for projecting screen by re-calculating ambient contrast ratio according to variation of ambient light |
| CN104318912A (en) * | 2014-10-23 | 2015-01-28 | 赵辉 | Method and device for detecting environmental light brightness |
| CN104318912B (en) * | 2014-10-23 | 2017-02-01 | 赵辉 | Method and device for detecting environmental light brightness |
| CN111051963A (en) * | 2016-07-01 | 2020-04-21 | 倾斜五股份有限公司 | Head-mounted projection display with multi-layer beam splitter and color correction |
| CN111051963B (en) * | 2016-07-01 | 2022-12-06 | 倾斜五股份有限公司 | Head-mounted projection display with multi-layer beam splitter and color correction |
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Application publication date: 20110420 |