CN101304540B - General Stereoscopic Image Synthesis Method Based on Lenticular LCD Autostereoscopic Display Device - Google Patents
General Stereoscopic Image Synthesis Method Based on Lenticular LCD Autostereoscopic Display Device Download PDFInfo
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Abstract
本发明公开了一种基于柱镜光栅LCD自由立体显示设备的通用立体图像合成方法。包括以下步骤：1)测量柱镜光栅的实际线数LPI值和实际倾斜角α值；2)根据合成立体图像所需的视点个数N以及分辨率H*V，对N个视点图像进行采样，每个视点图像的垂直分辨率采样成V/v，而水平分辨率采样成H/h，其中，N≥2，v*h＝N，v取最接近的整数值；3)根据实际线数LPI值和实际倾斜角α值以及LCD显示器的点距DOT，将经过采样的N个视点图像的RGB分量填充到立体图像的RGB分量中，得到所需的立体图像。本发明适用于具有任意线数LPI值和任意倾斜角α值的柱镜光栅，且能快速而高效地合成具有任意视点个数和任意分辨率的立体图像。
The invention discloses a general stereoscopic image synthesis method based on a lenticular lens grating LCD autostereoscopic display device. The method includes the following steps: 1) measuring the actual line number LPI value and the actual tilt angle α value of the lenticular lens grating; 2) sampling N viewpoint images according to the viewpoint number N and the resolution H*V required for synthesizing the stereoscopic image , the vertical resolution of each viewpoint image is sampled as V/v, and the horizontal resolution is sampled as H/h, where N≥2, v*h=N, and v is the closest 3) according to the actual line number LPI value and the actual tilt angle α value and the dot pitch DOT of the LCD display, fill the RGB components of the N viewpoint images through sampling into the RGB components of the stereoscopic image to obtain the required Stereoscopic image. The invention is suitable for lenticular gratings with any line number LPI value and any tilt angle α value, and can quickly and efficiently synthesize stereoscopic images with any number of viewpoints and any resolution.
Description
Technical field
The present invention relates to a kind of general stereo-picture synthetic method based on the pole mirror grating LCD freedom stereoscopic display device.
Background technology
Continuous development along with Display Technique, people have developed various need not by auxiliary tools of looking such as anaglyph spectacleses, and directly just can watch the free 3 D display technology of stereo-picture with bore hole, mainly comprise column mirror grating stereo demonstration, slit grating stereo display, holographic three-dimensional demonstration and the demonstration of body 3 D stereo etc.In numerous free 3 D display technologies, because of column mirror grating is easy to processing, stereoscopic visual effect is outstanding, and become current comparatively common free 3 D display technology based on the free 3 D display technology of column mirror grating.
3 D grating generally is attached to stereo-picture or display screen outside, and people just can utilize the refraction principle of light and see stereo-picture with bore hole like this.3 D grating can be divided into three major types substantially: slit grating, prismatic mirror grating and dot matrix grating.Slit grating is commonly called as the black light grid, and its image-forming principle is the pinhole imaging system principle, thereby it is that interval process black lines constitute black non transparent lines and transparent gap length structure arranged on transparent film.The slit grating imaging is clear, can not produce a dizzy eye effect basically, but it must have auxiliary background light source, is not having under the situation of light source, will be as dark as a stack of black cats and can't see any stereoeffect.Column mirror grating is commonly called as white raster, and its image-forming principle is the convex lens image-forming principle, and it is formed by the post lens arrangement of a rule.No matter have or not background light source, can see good stereoeffect by column mirror grating, stereoeffect is perfect more under the situation of light source of having powerful connections certainly.In addition, under the prerequisite that production technology improves constantly at present, the dizzy eye effect of column mirror grating also can be avoided.The dot matrix grating is called holographic formula dot matrix grating again, and its image-forming principle is the convex lens image-forming principle, and its surface is made up of bulbous protrusion one by one.Because the dot matrix grating is rarely found, and the slit grating stereoeffect is added column mirror grating and is easy to processing not as column mirror grating, is therefore greatly developed and popularizes based on the free stereo display equipment of column mirror grating.
Consideration based on implementation complexity and versatility, generally only be applicable to have the column mirror grating that certain line is counted LPI value and inclination angle alpha value with existing based on the supporting stereo-picture synthetic method of pole mirror grating LCD freedom stereoscopic display device, and generally also can only synthesize stereo-picture with fixed view number and fixed resolution, such stereo-picture synthetic method obviously lacks universality, has limited the application based on the free stereo display equipment of column mirror grating greatly.To this, we have proposed a kind of general stereo-picture synthetic method based on the pole mirror grating LCD freedom stereoscopic display device, this method is not only applicable to have the column mirror grating that free-throw line is counted LPI value and any inclination angle alpha value, and can synthesize stereo-picture fast and efficiently, thereby expanded application greatly based on the LCD free stereo display equipment of column mirror grating with any viewpoint number and arbitrary resolution.
Summary of the invention
The objective of the invention is to overcome the prior art deficiency, a kind of general stereo-picture synthetic method based on the pole mirror grating LCD freedom stereoscopic display device is provided.
General stereo-picture synthetic method based on the pole mirror grating LCD freedom stereoscopic display device may further comprise the steps:
1) actual line of measuring column mirror grating is counted LPI value and actual tilt angles α value;
2) viewpoint number N and the resolution H*V required according to synthetic stereo image samples to N visual point image, and the vertical resolution of each visual point image is sampled into V/v, and horizontal resolution is sampled into H/h, wherein, N 〉=2, v*h=N, v gets the most approaching
Integer value;
3) point of counting LPI value and actual tilt angles α value and LCD display according to actual line is apart from DOT, will be filled in the RGB component of stereo-picture through the RGB component of N visual point image of over-sampling, obtains required stereo-picture.
The actual line of described measurement column mirror grating is counted LPI value and actual tilt angles α value step:
(a) get that 4 width of cloth are black entirely, 2 width of cloth totally 6 width of cloth RGB images in vain entirely, wherein 4 width of cloth all black pictures as viewpoint 3 and viewpoint 4, and estimate that the proximal line that obtains column mirror grating counts the LPI value and be similar to inclination angle alpha value as the complete white image of viewpoint 1, viewpoint 2, viewpoint 5 and viewpoint 6,2 width of cloth;
(b) count the LPI value according to the proximal line of estimating and be similar to the stereo-picture of inclination angle alpha value synthetic 6 viewpoints of 6 width of cloth RGB images;
(c) observe stereo-picture by LCD free stereo display equipment based on column mirror grating, if can observe complete white visual effect in the display device dead ahead, the both direction of simultaneously taking back and take in the dead ahead is observed complete black visual effect, and the proximal line that description of step (a) is estimated is counted the LPI value and is similar to inclination angle alpha value is exactly that the actual line of this column mirror grating is counted LPI value and actual tilt angles α value;
(d) if do not observe the described complete black or complete white visual effect of step (c), then get near the line of approximation and count LPI value and inclination angle alpha value, repeat the operation of step (b) and step (c), till observing complete black or complete white visual effect.
Described will being filled in the RGB component of stereo-picture through the RGB component of N visual point image of over-sampling obtains required stereo-picture step:
(e) according to formula: X=(25.4/LPI/cos α)/DOT*3, calculate the RGB sub-pixel number X on the LCD display that the pitch of column mirror grating covered in the horizontal direction, wherein, the RGB sub-pixel on the LCD display is corresponding to the RGB component of image;
(f) according to formula: n=mod (i-3*j*tan α, X)/X*N, calculate the RGB component of N visual point image and the corresponding mapping table of RGB component of stereo-picture, wherein, mod represents modulo operation, i and j represent the level and the vertical coordinate value of the RGB component of stereo-picture, coordinate figure is with the coordinate figure (1 of the upper left corner RGB component of stereo-picture, 1) be benchmark, then i increases progressively 1 to the right, increases progressively 1 to next j, n represents that coordinate figure is (i in the stereo-picture, j) RGB component is corresponding to the corresponding RGB component of viewpoint n, when mod (i-3*j*tan α, X)/when the value of X*N is not integer, n gets immediate integer value, when mod (i-3*j*tan α, X)/during X*N=0, n=N;
(g) according to mapping table, the RGB component of N visual point image is filled in the RGB component of stereo-picture, the capable RGB component of every v for stereo-picture, per 1 row RGB component with N visual point image is filled, for the RGB component in each row of stereo-picture, its every 3*h RGB component is filled with per 1 RGB component of N visual point image, is all filled by the RGB component of N visual point image up to all RGB components of stereo-picture.
The present invention is applicable to have the column mirror grating that free-throw line is counted LPI value and any inclination angle alpha value, and can synthesize the stereo-picture with any viewpoint number and arbitrary resolution fast and efficiently.Compare other stereo-picture synthetic methods, the present invention can expand the application based on the pole mirror grating LCD freedom stereoscopic display device greatly.
Description of drawings
Fig. 1 is based on the lateral plan of the LCD free stereo display equipment of column mirror grating;
Fig. 2 is based on the front view of the LCD free stereo display equipment of column mirror grating;
Fig. 3 is the black entirely and full schematic diagrames of RGB image synthetic stereo image in vain of 2 width of cloth of 4 width of cloth;
Fig. 4 is that the RGB component of 4 visual point images distributes schematic diagram.
Embodiment
General stereo-picture synthetic method based on the pole mirror grating LCD freedom stereoscopic display device may further comprise the steps:
1) actual line of measuring column mirror grating is counted LPI value and actual tilt angles α value;
2) viewpoint number N and the resolution H*V required according to synthetic stereo image samples to N visual point image, and the vertical resolution of each visual point image is sampled into V/v, and horizontal resolution is sampled into H/h, wherein, N 〉=2, v*h=N, v gets the most approaching
Integer value;
It is the most approaching why v gets
Integer value, be based on the one hand the versatility of composition algorithm, be to make the value of v and h approaching on the other hand, make synthetic stereo-picture visual effect the best;
If the original level resolution of N visual point image greater than H/h, will be carried out horizontal down-sampling, otherwise then carry out horizontal up-sampling; If the original vertical resolution of N visual point image greater than V/3, will be carried out vertical down-sampling, otherwise then carry out vertical up-sampling, for example, we need synthesize the resolution with 4 viewpoints is the stereo-picture of 1024*768, at this moment, and V=1024, H=768, N=4, v=2, h=4/2=2, the horizontal resolution of 4 required like this visual point images should be sampled as 1024/2=512, and vertical resolution should be sampled as 768/2=384; And the original resolution of our existing 4 visual point images is 640*480, and we just need carry out down-sampling to existing 4 visual point images like this, and wherein horizontal sample rate is 512/640, and vertical sample rate is 384/480;
3) point of counting LPI value and actual tilt angles α value and LCD display according to actual line is apart from DOT, will be filled in the RGB component of stereo-picture through the RGB component of N visual point image of over-sampling, obtains required stereo-picture.
The actual line of described measurement column mirror grating is counted LPI value and actual tilt angles α value step:
(a) get that 4 width of cloth are black entirely, 2 width of cloth totally 6 width of cloth RGB images in vain entirely, wherein 4 width of cloth all black pictures as viewpoint 3 and viewpoint 4, and estimate that the proximal line that obtains column mirror grating counts the LPI value and be similar to inclination angle alpha value as the complete white image of viewpoint 1, viewpoint 2, viewpoint 5 and viewpoint 6,2 width of cloth;
(b) count the LPI value according to the proximal line of estimating and be similar to the stereo-picture of inclination angle alpha value synthetic 6 viewpoints of 6 width of cloth RGB images;
(c) observe stereo-picture by LCD free stereo display equipment based on column mirror grating, if can observe complete white visual effect in the display device dead ahead, the both direction of simultaneously taking back and take in the dead ahead is observed complete black visual effect, and the proximal line that description of step (a) is estimated is counted the LPI value and is similar to inclination angle alpha value is exactly that the actual line of this column mirror grating is counted LPI value and actual tilt angles α value;
(d) if do not observe the described complete black or complete white visual effect of step (c), then get near the line of approximation and count LPI value and inclination angle alpha value, repeat the operation of step (b) and step (c), till observing complete black or complete white visual effect.
As shown in Figure 1, the LCD free stereo display equipment based on column mirror grating comprises LCD display (1), transparent organic glass (2) and column mirror grating (3).By in the middle of LCD display and column mirror grating, installing transparent organic glass additional, make that both distances are the focal distance f of column mirror grating unit.
As shown in Figure 2, the height of each the RGB sub-pixel on the LCD display is 3 times of its width, it is arranged on LCD display in the following order: each provisional capital is RGBRGB ... until the full whole LCD display of row, wherein per three adjacent R, G, B sub-pixel constitute a LCD pixel.The number that each column mirror grating unit covers the RGB sub-pixel in the horizontal direction is X, its axis of lens is α with respect to the inclination angle of LCD display vertical axis, like this benefit one of She Zhiing be can the balance synthetic stereo image in the resolution of level and vertical direction, guarantee that its ratio is undistorted; The 2nd, can alleviate the mole line effect that causes because of the arrangement of LCD pixel.
When being transferred to column mirror grating via LCD display by the synthetic stereo-picture of N viewpoint, because lens are to interception of rays, make that (n＜N) individual viewpoint enters beholder's left eye for n in the stereo-picture, and n+1 viewpoint enters beholder's right eye, thereby makes the beholder perceive stereoeffect.For by the synthetic stereo-picture of N viewpoint, always have N-1 best viewing areas, clear and abundant stereoscopic visual effect can both be watched in each zone.Along with the variation of viewpoint number N, can both show exactly based on the LCD free stereo display equipment of column mirror grating, enjoy thereby give the perfect stereoscopic vision of beholder.
As shown in Figure 3 be the schematic diagrames of the entirely black and complete white RGB image synthetic stereo image of 2 width of cloth of 4 width of cloth.
Described will being filled in the RGB component of stereo-picture through the RGB component of N visual point image of over-sampling obtains required stereo-picture step:
(e) according to formula: X=(25.4/LPI/cos α)/DOT*3, calculate the RGB sub-pixel number X on the LCD display that the pitch of column mirror grating covered in the horizontal direction, wherein, the RGB sub-pixel on the LCD display is corresponding to the RGB component of image;
(f) according to formula: n=mod (i-3*j*tan α, X)/X*N, calculate the RGB component of N visual point image and the corresponding mapping table of RGB component of stereo-picture, wherein, mod represents modulo operation, i and j represent the level and the vertical coordinate value of the RGB component of stereo-picture, coordinate figure is with the coordinate figure (1 of the upper left corner RGB component of stereo-picture, 1) be benchmark, then i increases progressively 1 to the right, increases progressively 1 to next j, n represents that coordinate figure is (i in the stereo-picture, j) RGB component is corresponding to the corresponding RGB component of viewpoint n, when mod (i-3*j*tan α, X)/when the value of X*N is not integer, n gets immediate integer value, when mod (i-3*j*tan α, X)/during X*N=0, n=N;
(g), the RGB component of N visual point image is filled in the RGB component of stereo-picture according to mapping table;
The capable RGB component of every v for stereo-picture, per 1 row RGB component with N visual point image is filled, that is to say, the the 1st to v capable RGB component of stereo-picture comes corresponding with the 1st row RGB component of N visual point image, the capable RGB component of the v+1 to 2*v of stereo-picture comes correspondence with the 2nd row RGB component of N visual point image, and the rest may be inferred;
For the RGB component in each row of stereo-picture, its every 3*h RGB component is filled with per 1 RGB component of N visual point image, all RGB components up to stereo-picture are all filled by the RGB component of N visual point image, that is to say, the the 1st to 3*h RGB component of certain row of stereo-picture filled with the 1st RGB component of N visual point image corresponding line, the same 3*h+1 to 6*h of delegation of stereo-picture RGB component filled with the 2nd RGB component of N visual point image corresponding line, the rest may be inferred, all filled by the RGB component of N visual point image up to all RGB components of stereo-picture.
For example, work as N=4, DOT=0.264mm, LPI=26, α=atan (1/6), when resolution was 1024*768, we can obtain the RGB component of 4 visual point images as shown in table 1 and the corresponding mapping table of RGB component of stereo-picture.
The mapping table of 4 viewpoints of table 1
| R 4 | G 1 | B 1 | R 1 | G 2 | B 2 | R 2 | G 3 | B 3 | R 3 | G 4 | B 4 | R 4 | G 1 | B 1 | R 2 | G 2 | B 2 | R 3 | G 3 | B 3 | R 4 | G 4 | B 4 | R 1 | G 1 | B 1 | R 2 | ... |
| R 4 | G 4 | B 1 | R 1 | G 1 | B 2 | R 2 | G 2 | B 3 | R 3 | G 4 | B 4 | R 4 | G 1 | B 1 | R 1 | G 2 | B 2 | R 2 | G 3 | B 3 | R 3 | G 4 | B 4 | R 1 | G 1 | B 1 | R 2 | ... |
| R 4 | G 4 | B 1 | R 1 | G 1 | B 2 | R 2 | G 2 | B 3 | R 3 | G 3 | B 4 | R 4 | G 4 | B 1 | R 1 | G 2 | B 2 | R 2 | G 3 | B 3 | R 3 | G 4 | B 4 | R 4 | G 1 | B 1 | R 1 | ... |
| R 4 | G 4 | B 4 | R 1 | G 1 | B 1 | R 2 | G 2 | B 2 | R 3 | G 3 | B 4 | R 4 | G 4 | B 1 | R 1 | G 1 | B 2 | R 2 | G 2 | B 3 | R 3 | G 3 | B 4 | R 4 | G 1 | B 1 | R 1 | ... |
Image RGB component with as shown in Figure 44 viewpoints is assigned as example, at this moment, v=2, h=2 for per 2 row RGB components of stereo-picture, fills with per 1 capable RGB component of 4 visual point images; For the RGB component in each row of stereo-picture, its per 6 RGB components are filled with per 1 RGB component of N visual point image.For example, the 1st RGB component of the 1st row of stereo-picture (coordinate figure is (1,1)) is the R component, and the R component of its corresponding viewpoint 4 is so put into the value of the 1st the R component of the 1st row of viewpoint 4 the 1st RGB component of the 1st row of stereo-picture; And for example, the 8th RGB component of the 1st row of stereo-picture (coordinate figure is (1,8)) is the G component, and the G component of its corresponding viewpoint 3 is so put into the value of the 2nd the G component of the 1st row of viewpoint 3 the 8th RGB component of the 1st row of stereo-picture; For another example, (coordinate figure is (4 to the 7th RGB component of the 4th row of stereo-picture, 7)) be the R component, the R component of its corresponding viewpoint 2, so the value of the 2nd the R component of the 2nd row of viewpoint 2 is put into the 7th RGB component of the 4th row of stereo-picture, the rest may be inferred, all filled by the RGB component of each visual point image up to all RGB components of stereo-picture, and the stereo-picture of such 4 viewpoints is also just synthetic to finish.
At this moment, by the LCD free stereo display equipment based on column mirror grating, the beholder just can watch clear and true to nature stereoscopic visual effect at 3 best viewing areas.
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| CN102447936B (en) * | 2011-11-10 | 2013-09-04 | 吉林大学 | Method for generating LED (Light-Emitting Diode) large-screen stereoscopic image file |
| CN102421001B (en) * | 2011-11-16 | 2013-11-06 | 合肥工业大学 | Synthesis method of three-dimensional image in case that non-integer sub-pixel is covered by column lens raster |
| CN102708577B (en) * | 2012-06-15 | 2016-05-11 | 中航华东光电有限公司 | The synthetic method of multi-viewpoint three-dimensional picture |
| CN103676173B (en) * | 2013-12-24 | 2016-02-03 | 北京邮电大学 | The fill method of a kind of LED three-dimensional display screen and a kind of anaglyph |
| CN103869566B (en) * | 2014-03-31 | 2017-04-19 | 南京中电熊猫液晶显示科技有限公司 | Pixel structure, liquid crystal display panel and stereoscopic display device |
| CN105679113A (en) * | 2016-04-11 | 2016-06-15 | 成都汇盈利智能科技有限公司 | Method for applying naked-eye 3D technology to teaching aid |
| CN105761558A (en) * | 2016-04-11 | 2016-07-13 | 成都汇盈利智能科技有限公司 | Naked eye 3D teaching tool |
| CN108076208B (en) * | 2016-11-15 | 2021-01-01 | 中兴通讯股份有限公司 | Display processing method and device and terminal |
| CN108156445B (en) * | 2017-12-29 | 2021-03-16 | 无锡易维视显示技术有限公司 | Method for rapidly generating naked eye three-dimensional display sub-pixel mapping table |
| CN109410780A (en) * | 2018-12-04 | 2019-03-01 | 深圳奇屏科技有限公司 | A low crosstalk naked eye 3D-LED large screen |
| CN110730341A (en) * | 2019-11-01 | 2020-01-24 | 城乡联投建设发展有限公司 | Mobile phone grating film calibration method based on naked eye 3D |
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Effective date of registration: 20180903 Address after: 518000 B unit 101, Fengyun mansion 5, Xili street, Nanshan District, Shenzhen, Guangdong. Patentee after: WANWEI DISPLAY TECHNOLOGY (SHENZHEN) Co.,Ltd. Address before: 518000 2 of Fengyun tower, Fifth Industrial Zone, Nanshan District North Ring Road, Shenzhen, Guangdong, 101 Patentee before: World wide technology (Shenzhen) Ltd. |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100602 |