CN103105146A - Smoothness detection method of cylindrical lenticulation for three-dimension display - Google Patents
Smoothness detection method of cylindrical lenticulation for three-dimension display Download PDFInfo
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Abstract
The invention relates to the field of smoothness detection, in particular to a smoothness detection method of a cylindrical lenticulation for three-dimension display. The smoothness detection method of the cylindrical lenticulation for the three-dimension display is characterized by including a first step of providing a cylindrical lens displayer to be used for displaying a test image, a second step of shooting the test image by a pair of charge coupled devices (CCDs) at the best viewing distance to respectively obtain a left detection image and a right detection image, a third step of conducting image analysis to the left detection image, a fourth step of conducting image analysis to the right detection image, a fifth step of respectively obtaining a crosstalk value of the left detection image and a crosstalk value of the right detection image according to a crosstalk coefficient, and a sixth step of working out a smoothness indicator of a cylindrical lens. The smoothness detection method of the cylindrical lenticulation for the three-dimension display has the advantages of being easy to operate, and capable of accurately providing a judgment indicator of bend degree of the cylindrical lens to provide an effective reference for a smooth measure of the cylindrical lens, and having certain guiding significance to improve performance of the cylindrical lenticulation stereoscopic displayer.
Description
Technical field
The present invention relates to the planarization detection field, especially a kind of planarization detection method of the Lenticular screen for 3-D display.
Background technology
3-D display (Three-dimensional Display, 3D) become current noticeable sciemtifec and technical sphere, wherein the Lenticular screen 3D display technique based on the parallax illumination technology becomes the present stage study hotspot because not needing to wear such as auxiliary devices such as anaglyph spectacleses.Lenticular screen formula 3D display is coupled to form by Lenticular screen and 2D display precision, wherein, Lenticular screen is the travel path of the change transmitted light of orientation as the beam splitter purpose, makes beholder's right and left eyes watch different anaglyphs, thereby produces stereoeffect.
Lenticular screen material (main concentrate for pet sheet material and pet film material) on the market at present, produce and transportation in very easily cause flexural deformation.Ideally, because the level of Lenticular screen is divided light action, what eyes were seen is the rectangle plane image of adjacent isolated area, if but the surface irregularity of post lens, to cause the light splitting distortion, make the interregional image section of 3 D visible overlapping, increase crosstalking of stereo-picture, reduce and watch comfort level.Therefore, in order to improve the stereo display effect, can do certain smooth processing to Lenticular screen, corresponding flatness detection mode is essential.
We have studied the impact that the planarization stereoscopic image of post lens is crosstalked for this reason, utilize image processing method, calculate the area in stereo-picture zone of crosstalking that eyes are seen, and then draw the roughness index of post lens.This index is directly reacted the degree of crosstalk of stereo-picture, and processing for the correction in later stage provides effective basis for estimation.
Summary of the invention
In view of this, the planarization detection method that the purpose of this invention is to provide a kind of Lenticular screen for 3-D display.
The present invention adopts following scheme to realize: a kind of planarization detection method of the Lenticular screen for 3-D display, it is characterized in that, and comprise the following steps:
S1: provide a post lenticular display in order to show a test pattern;
S2: described test pattern is taken with a pair of CCD in viewing ratio and obtained respectively a left detection figure and a right detection figure;
S3: described left detection figure is carried out graphical analysis; Different according to color and the gray shade scale of zones of different in described left detection figure, whole left detection figure is divided into several different vision areas, simultaneously, distinguish the available field of visual of described left detection figure and the vision area and each vision area is carried out label of crosstalking, and obtain the area of each vision area in described left detection figure and the area of total vision area;
S4: described right detection figure is carried out graphical analysis; Different according to color and the gray shade scale of zones of different in described right detection figure, whole right detection figure is divided into several different vision areas, simultaneously, distinguish the available field of visual of described right detection figure and the vision area and each vision area is carried out label of crosstalking, and obtain the area of each vision area in described right detection figure and the area of total vision area;
S5: obtain respectively the crossfire value of left detection figure and the crossfire value of right detection figure according to crosstalk coefficient, simultaneously, obtain the available field of visual ratio of left detection figure and the available field of visual ratio of right detection figure;
S6: the planarization index that calculates the post lens.
In an embodiment of the present invention, described step S3 is specially:
S31: the gray-scale value of described left detection being schemed each pixel RGB component is analyzed, and the component that gray-scale value is larger is divided available field of visual and the vision area of crosstalking as the viewpoint color of this pixel with this;
S32: the area that calculates each vision area
And the area of total vision area
, wherein l represents left detection figure, and n represents the numbering of vision area, and n ∈ (N, N), N are positive integer, when n=0, are available field of visual, and n ≠ 0 o'clock is the vision area of crosstalking.
In an embodiment of the present invention, described step S4 is specially:
S41: the gray-scale value of described right detection being schemed each pixel RGB component is analyzed, and the component that gray-scale value is larger is divided available field of visual and the vision area of crosstalking as the viewpoint color of this pixel with this;
S42: the area that calculates each vision area
And the area of total vision area
, wherein r represents right detection figure, and m represents the numbering of vision area, and m ∈ (N, N), N are positive integer, when m=0, are available field of visual, and m ≠ 0 o'clock is the vision area of crosstalking.
In an embodiment of the present invention, described step S5 is specially:
S51: determine crosstalk coefficient k, crosstalk coefficient k represent the to crosstalk degree of crook of vision area;
S52: according to formula
Calculate the crossfire value of left detection figure; According to formula
Calculate the crossfire value of right detection figure;
S53: according to formula
Calculate the available field of visual ratio of left detection figure; According to formula
Calculate the available field of visual ratio of right detection figure.
In an embodiment of the present invention, described step S6 is specially: according to out-of-flatness crossfire value formula
Calculate out-of-flatness crossfire value A, namely draw the planarization index of post lens.
In an embodiment of the present invention, after the described planarization index that draws the post lens, draw the 3 dimensional drawing of post lens surface planarization by matlab emulation according to this roughness index.
In an embodiment of the present invention, described viewing ratio is determined by the parameter of described post lenticular display.
The present invention proposes a kind of detection method of Lenticular screen flatness.For at present on the market the Lenticular screen material thereby the problem that bending affects the stereo display effect easily appears, provide a kind ofly than the naked-eye observation method of test column lens planarization more accurately, the computing formula of post lens flatness has been proposed.Method of the present invention is simple to operate and can accurately provide the judgement index of the degree of crook of post lens, and the coupled columns lens take smooth measure that effective reference is provided, and also the performance of lifting column lenticulation three-dimensional display are had certain directive significance.
Description of drawings
Fig. 1 is the schematic diagram that the present invention uses two CCD to take.
Fig. 2 is the continuous viewpoint view that the present invention is observed by left CCD.
Fig. 3 is the continuous viewpoint view that the present invention is observed by right CCD.
Fig. 4 is the continuous viewpoint view center pillar lens surface degree of crook schematic diagram that the present invention is observed by left CCD.
Embodiment
For making purpose of the present invention, technical scheme and advantage clearer, below will by specific embodiment and relevant drawings, the present invention be described in further detail.
The invention provides a kind of planarization detection method of the Lenticular screen for 3-D display, it is characterized in that, comprise the following steps:
S1: provide a post lenticular display in order to show a test pattern;
S2: described test pattern is taken with a pair of CCD in viewing ratio and obtained respectively a left detection figure and a right detection figure;
S3: described left detection figure is carried out graphical analysis; Different according to color and the gray shade scale of zones of different in described left detection figure, whole left detection figure is divided into several different vision areas, simultaneously, distinguish the available field of visual of described left detection figure and the vision area and each vision area is carried out label of crosstalking, and obtain the area of each vision area in described left detection figure and the area of total vision area;
S4: described right detection figure is carried out graphical analysis; Different according to color and the gray shade scale of zones of different in described right detection figure, whole right detection figure is divided into several different vision areas, simultaneously, distinguish the available field of visual of described right detection figure and the vision area and each vision area is carried out label of crosstalking, and obtain the area of each vision area in described right detection figure and the area of total vision area;
S5: obtain respectively the crossfire value of left detection figure and the crossfire value of right detection figure according to crosstalk coefficient, simultaneously, obtain the available field of visual ratio of left detection figure and the available field of visual ratio of right detection figure;
S6: the planarization index that calculates the post lens.
In a preferred embodiment of the present invention, the post lenticular display adopts the three-dimensional display of 8 viewpoints, gets the complete red image of 3 width, the complete green image of 3 width, and the 2 full blue images of width are totally 8 RGB images, according to red, green, blue, red, green, blue, red, green order compound stereoscopic disparity map.As shown in Figure 1, use a post lenticular display with n viewpoint to show a test pattern, we choose monochrome image that RGB replaces successively as test pattern, and every figure is the achromatic sheet of gray-scale value 255, and arrangement mode is RGBRGBRG.
Take in viewing ratio and optimal viewing angle the test pattern that shows with two CCD, described viewing ratio and optimal viewing angle are determined by the parameter of described post lenticular display, if that this moment, left CCD took is the full red-out figure of viewpoint 4, that this moment, right CCD took so is the full Cyanopia figure of viewpoint 3.As shown in Figures 2 and 3, Fig. 2 is the continuous viewpoint view that is observed by left CCD, and Fig. 3 is the continuous viewpoint view that is observed by right CCD.
Described step S3 is specially:
S31: the gray-scale value of described left detection being schemed each pixel RGB component is analyzed, and the component that gray-scale value is larger is divided available field of visual and the vision area of crosstalking as the viewpoint color of this pixel with this; The color of determining each irregular vision area is also determined simultaneously the viewpoint under this vision area;
S32: the area that calculates each vision area
And the area of total vision area
, wherein l represents left detection figure, and n represents the numbering of vision area, and n ∈ (N, N), N are positive integer, when n=0, are available field of visual, and n ≠ 0 o'clock is the vision area of crosstalking.
As shown in Figure 4, the rectangular area is the whole view pictures that left CCD photographs, and n represents the numbering of vision area, increases progressively from left to right arrangement; Curve is the separatrix between vision area, is the vision area border flexural deformation that the out-of-flatness by Lenticular screen causes; The curve both sides are the vision area of different colours, and its quantity is the smooth degree of reaction column lens directly, curve more multilist photopic vision interval crosstalk more serious.We call primary vision area to the vision area of area maximum in display frame, and also referred to as available field of visual, other vision areas are all by the uneven vision area of crosstalking that produces of post lens.Can find out on scheming | the vision area that n| is larger is far away apart from primary vision area, and corresponding crooked degree is higher.Vision area S in figure for example
lBe available field of visual, S
l+1, S
l+2, S
l+3The next one that occurs successively for the increase along with the degree of crook vision area of crosstalking.
Described step S4 is specially:
S41: the gray-scale value of described right detection being schemed each pixel RGB component is analyzed, and the component that gray-scale value is larger is divided available field of visual and the vision area of crosstalking as the viewpoint color of this pixel with this;
S42: the area that calculates each vision area
And the area of total vision area
, wherein r represents right detection figure, and m represents the numbering of vision area, and m ∈ (N, N), N are positive integer, when m=0, are available field of visual, and m ≠ 0 o'clock is the vision area of crosstalking.
Described step S5 is specially:
S51: determine crosstalk coefficient k, crosstalk coefficient k represent the to crosstalk degree of crook of vision area;
Because the degree of crook of whole post lens plane is also inhomogeneous, higher the closer to the vision area degree of crook of image border, so we utilize crosstalk coefficient k to characterize this degree of crook that changes along with the distance increase.By analyzing, the crosstalk coefficient k of the crosstalk zone from primary vision area away from more can corresponding increase, and k=|n|, n are the vision area numbering.。
S52: according to formula
Calculate the crossfire value of left detection figure; According to formula
Calculate the crossfire value of right detection figure;
S53: according to formula
Calculate the available field of visual ratio of left detection figure; According to formula
Calculate the available field of visual ratio of right detection figure.
Described step S6 is specially: according to out-of-flatness crossfire value formula
Calculate out-of-flatness crossfire value A, namely draw the planarization index of post lens.After drawing the planarization index of post lens, draw the 3 dimensional drawing of post lens surface planarization by matlab emulation according to this roughness index.
Above-listed preferred embodiment; the purpose, technical solutions and advantages of the present invention are further described; institute is understood that; the above is only preferred embodiment of the present invention; not in order to limit the present invention; within the spirit and principles in the present invention all, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (7)
1. a planarization detection method that is used for the Lenticular screen of 3-D display, is characterized in that, comprises the following steps:
S1: provide a post lenticular display in order to show a test pattern;
S2: described test pattern is taken with a pair of CCD in viewing ratio and obtained respectively a left detection figure and a right detection figure;
S3: described left detection figure is carried out graphical analysis; Different according to color and the gray shade scale of zones of different in described left detection figure, whole left detection figure is divided into several different vision areas, simultaneously, distinguish the available field of visual of described left detection figure and the vision area and each vision area is carried out label of crosstalking, and obtain the area of each vision area in described left detection figure and the area of total vision area;
S4: described right detection figure is carried out graphical analysis; Different according to color and the gray shade scale of zones of different in described right detection figure, whole right detection figure is divided into several different vision areas, simultaneously, distinguish the available field of visual of described right detection figure and the vision area and each vision area is carried out label of crosstalking, and obtain the area of each vision area in described right detection figure and the area of total vision area;
S5: obtain respectively the crossfire value of left detection figure and the crossfire value of right detection figure according to crosstalk coefficient, simultaneously, obtain the available field of visual ratio of left detection figure and the available field of visual ratio of right detection figure;
S6: the planarization index that calculates the post lens.
2. the planarization detection method of the Lenticular screen for 3-D display according to claim 1, it is characterized in that: described step S3 is specially:
S31: the gray-scale value of described left detection being schemed each pixel RGB component is analyzed, and the component that gray-scale value is larger is divided available field of visual and the vision area of crosstalking as the viewpoint color of this pixel with this;
S32: the area that calculates each vision area
And the area of total vision area
, wherein l represents left detection figure, and n represents the numbering of vision area, and n ∈ (N, N), N are positive integer, when n=0, are available field of visual, and n ≠ 0 o'clock is the vision area of crosstalking.
3. the planarization detection method of the Lenticular screen for 3-D display according to claim 2, it is characterized in that: described step S4 is specially:
S41: the gray-scale value of described right detection being schemed each pixel RGB component is analyzed, and the component that gray-scale value is larger is divided available field of visual and the vision area of crosstalking as the viewpoint color of this pixel with this;
S42: the area that calculates each vision area
And the area of total vision area
, wherein r represents right detection figure, and m represents the numbering of vision area, and m ∈ (N, N), N are positive integer, when m=0, are available field of visual, and m ≠ 0 o'clock is the vision area of crosstalking.
4. the planarization detection method of the Lenticular screen for 3-D display according to claim 3, it is characterized in that: described step S5 is specially:
S51: determine crosstalk coefficient k, crosstalk coefficient k represent the to crosstalk degree of crook of vision area;
S52: according to formula
Calculate the crossfire value of left detection figure; According to formula
Calculate the crossfire value of right detection figure;
S53: according to formula
Calculate the available field of visual ratio of left detection figure; According to formula
Calculate the available field of visual ratio of right detection figure.
5. the planarization detection method of the Lenticular screen for 3-D display according to claim 4, it is characterized in that: described step S6 is specially: according to out-of-flatness crossfire value formula
Calculate out-of-flatness crossfire value A, namely draw the planarization index of post lens.
6. the planarization detection method of the Lenticular screen for 3-D display according to claim 5, it is characterized in that: after the described planarization index that draws the post lens, draw the 3 dimensional drawing of post lens surface planarization by matlab emulation according to this roughness index.
7. the planarization detection method of the Lenticular screen for 3-D display according to claim 1, it is characterized in that: described viewing ratio is determined by the parameter of described post lenticular display.
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| WO2022246844A1 (en) * | 2021-05-28 | 2022-12-01 | 京东方科技集团股份有限公司 | Screen detection method and apparatus, device, computer program, and readable medium |
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| CN105898287A (en) * | 2016-05-05 | 2016-08-24 | 清华大学 | Device and method for machine visual analysis based on naked-eye stereoscopic display |
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| CN109791748A (en) * | 2016-09-28 | 2019-05-21 | 富士胶片株式会社 | Grating display body, the forming method of raster image, the formation program of the manufacturing method of grating display body and raster image |
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| CN107888906A (en) * | 2017-11-23 | 2018-04-06 | 张家港康得新光电材料有限公司 | The detecting system of crosstalk, the detection method of crosstalk, storage medium and processor |
| CN112543318A (en) * | 2020-12-01 | 2021-03-23 | 深圳英伦科技股份有限公司 | 3D display screen compensation method, system and computer readable storage medium |
| CN112543318B (en) * | 2020-12-01 | 2023-02-17 | 深圳英伦科技股份有限公司 | 3D display screen compensation method, system and computer readable storage medium |
| WO2022246844A1 (en) * | 2021-05-28 | 2022-12-01 | 京东方科技集团股份有限公司 | Screen detection method and apparatus, device, computer program, and readable medium |
| CN113916907A (en) * | 2021-12-13 | 2022-01-11 | 成都工业学院 | Grating stereograph printing quality detection method |
| CN113916907B (en) * | 2021-12-13 | 2022-02-18 | 成都工业学院 | Grating stereograph printing quality detection method |
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