CN107018398A - A kind of method for quantifying demarcation for light field Three-dimensional Display - Google Patents
A kind of method for quantifying demarcation for light field Three-dimensional Display Download PDFInfo
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- CN107018398A CN107018398A CN201710135853.XA CN201710135853A CN107018398A CN 107018398 A CN107018398 A CN 107018398A CN 201710135853 A CN201710135853 A CN 201710135853A CN 107018398 A CN107018398 A CN 107018398A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N17/00—Diagnosis, testing or measuring for television systems or their details
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N13/00—Stereoscopic video systems; Multi-view video systems; Details thereof
- H04N13/10—Processing, recording or transmission of stereoscopic or multi-view image signals
- H04N13/106—Processing image signals
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N13/00—Stereoscopic video systems; Multi-view video systems; Details thereof
- H04N2013/0074—Stereoscopic image analysis
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- Multimedia (AREA)
- Signal Processing (AREA)
- Health & Medical Sciences (AREA)
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- General Health & Medical Sciences (AREA)
- Testing, Inspecting, Measuring Of Stereoscopic Televisions And Televisions (AREA)
- Processing Or Creating Images (AREA)
Abstract
The invention discloses a kind of method for quantifying demarcation for light field Three-dimensional Display, including：S1：According to field demand using can secondary development three-dimensional software generate several demarcation source image data；S2：Several source image datas are carried out with separation sequence and constitutes pixel sequence, and the demarcation level image that restructuring obtains agreeing with resolution ratio is sampled to pixel sequence；S3：Demarcation level image is uploaded to two dimensional surface matrix display, cylindrical lens array or lenticule are finely adjusted using D translation platform, to reach best match effect；S4：Repeat step S2 to S3, with generating quantification level image；S5：Upload quantization level image to sample to effect to two dimensional surface matrix display, and using CCD, carry out data processing comparison, the result quantified is detected to light field Three-dimensional Display effect.The invention has the advantages that：Significantly reduce quantization error, calibration structure more accurate.
Description
Technical field
The present invention relates to light field dimension display technologies field, and in particular to a kind of to quantify demarcation for light field Three-dimensional Display
Method.
Background technology
Three-dimensional Display has the function of providing three-dimensional scenic depth preception, and objective world is spatially three-dimensional, depth
It is third dimension information, human visual system is exactly a kind of complicated by feeling that (what is experienced is to three-dimensional world to two-dimensional projection
Image) to the process of consciousness (by the cognitive three-dimensional world of two dimensional image).Human perception nature depth is due to images of left and right eyes viewing
Real world has slight difference, and brain is merged the two, obtains 3 D stereo and feels.At present in amusement and industrial and commercial circles
Most common three-dimensional presentation technology is most still to use the method based on stereovision.This technical principle is to use various passages
The image of left eye and right eye is presented to left and right two respectively.The passage usually used has color filter, polaroid and electricity
Sub switch etc..This kind of method is easier to due to realizing, still there is wide application in amusement and business system at present.So
And, inevitably there is retinal rivalry using various passages or intensity declines caused eye fatigue, require to see during viewing
The person of seeing wears special glasses always, and the position of fixed eyes is also uncomfortable in itself, and these deficiencies are all limited based on vertical
Three-dimensional rendering method further the applying in amusement and the communications field of body observation.
Light field Three-dimensional Display is that have that any bore hole stereoscopic display technology helped regarding instrument need not be worn.In stereoscopic display
Real image refers to that the virtual image corresponding thereto is then to be deep into the figure inside display screen with the image for highlighting effect screen
Picture, and the aspect of light field Three-dimensional Display research is real image part, real image is more excellent in terms of depth perception compared with the virtual image, more
There is the value of research.
Biggest advantage of light track algorithm is to generate one of main algorithm of photo-realistic images.Its main thought is by following the trail of through picture
Which object of the visible light in face is interacted therewith, so as to simulate the propagation of light in the environment.In real world, light
It is irradiated on object, is reflected by the object or through transparent substance, reflection light reaches the mirror of human eye or camera from light source
Head.And biggest advantage of light track algorithm is calculated against the direction of light, it is from the camera of simulation, backward tracing light
Into scene, so as to set up the image of scene.
Compared to other three-dimensional display apparatus, light field Three-dimensional Display effect still be present, be mainly manifested in 3 sides
Face：First, current crosstalk ratio is high, and picture has ghost image, spectators is produced the discomfort such as visual fatigue, dim eyesight, dizzy；The
Two, due to adding optics, so the colour gamut of light field three-dimensional display apparatus can reduce, and colour temperature can also change, from
And image colour cast is occurred；3rd, light field Three-dimensional Display product working status relative to resolution ratio be remarkably decreased, be that influence is aobvious
Show the key factor of effect.However, to every optically and electrically performance indications of light field Three-dimensional Display, standard is not established in the industry
The testing standard of change.
In the problem of light field dimension display technologies are present, influence of the crosstalk phenomenon to watching image quality is the hugest.
Meanwhile, crosstalk degree is equally the important indicator for weighing a three-dimensional display system, so the quantization demarcation to optics just has
Great demand, but had the disadvantage that using the measuring method of light-field camera：
(1) accurate expensive optical instrument is needed.
(2) complicated data handling procedure.
(3) harsh light environment.
Though the convenient evaluation method process for three-dimensional display system crosstalk degree does not need strict experimental situation simply, only
Normal visual acuity of observer's eyes after correction need to be only required, the eye problems such as no colour blindness, to the quantity and science of observer
Attainment has no too high requirement.Due to the model be because it based on brightness, tone and saturation degree, though meet regarding for human eye
Feel characteristic, but human eye will be far above the sensitiveness to tone and saturation degree to the sensitiveness of brightness, and observer's subjective impact is larger.
There is problems with convenient evaluation method：
(1) precision deficiency and uncalibrated visual servo.
(2) limitation does not consider that sub-pixel influences in terms of research.
(3) time-division processing is still needed to.
The content of the invention
It is contemplated that at least solving one of above-mentioned technical problem.
Therefore, it is an object of the invention to propose a kind of method for quantifying demarcation for light field Three-dimensional Display, making light field three
Cylindrical lens array or microlens array are demarcated with being optimal of two dimensional surface matrix display in dimension display, it is possible to demarcation
Effect is quantified, and greatly facilitates the Indexs measure of light field three-dimensional display apparatus.
To achieve these goals, embodiment of the invention discloses that a kind of side for quantifying demarcation for light field Three-dimensional Display
Method, comprises the following steps：S1：According to field demand using can secondary development three-dimensional software generate several demarcation source images number
According to；S2：Several described source image datas are carried out with separation sequence and constitutes pixel sequence, and the pixel sequence is sampled
Restructuring obtains agreeing with the demarcation level image of resolution ratio；S3：The demarcation level image is uploaded to two dimensional surface matrix display,
Cylindrical lens array or lenticule are finely adjusted using D translation platform, to reach best match effect；S4：Repeat step S2 is extremely
S3, with generating quantification level image；S5：The quantization level image is uploaded to the two dimensional surface matrix display, and is used
CCD is sampled to effect, carries out data processing comparison, and the result quantified is detected to light field Three-dimensional Display effect.
Further, in step S1：The three-dimensional software generation demarcation source image data of the secondary development is usage scenario
Description language carries out parallel shoot of aperture camera model to camera and sets what is obtained.
Further, in step s 5, the placement of the CCD is placed in the way of converging shooting and parallel ground.
Further, in step s 5, it is respectively to one using three CCD that the use CCD, which carries out sampling to effect,
Three sub-pixel samplings of pixel.
Further, in step s 5, the method for the comparing is more than the data of error preset value for removal error,
Solved with form and aspect scale, the data of three obtained dimension are integrated, and obtain virtual value.
Further, handle software Matlab using shape and separation sequence is carried out to several described source image datas.
According to embodiments of the present invention is used for the method that light field Three-dimensional Display quantifies demarcation, with advantages below：
(1) present invention calculates correct reflection and refraction angle using the method for ray tracing, can reach completely true
3D visual effect, correct for the error and interference from human factor in calibration process, and can in three form and aspect measurement amount
Change, significantly reduce quantization error.
(2) present invention can secondary development three-dimensional software using the method for simulating parallel shooting, in three-dimensional display system
Under different display patterns, the viewing effect obtained is also different.Although real image pattern is than virtual image pattern on viewing angle
It is slightly narrow, but the distance of its stereo-picture for being formed and observer are closer, therefore the virtual image can be better than in terms of depth perception
Display pattern, comparatively more research value.
(3) method that the present invention gathers light field Three-dimensional Display data using convergence, the public domain for converging collection is larger, warp
The light field three dimensional rendered images crossed after processing can carry more information.Therefore the present invention can be widely used in light field Three-dimensional Display
Quantify the technical field of demarcation.
(4) pixel subdivision of two dimensional surface matrix display, using the method for fine subregion, is 3 sons by the present invention
Pixel, analytical effect is carried out in the level of sub-pixel.Therefore light field Three-dimensional Display quantization scaling method is more smart than ever by the present invention
Really.
The additional aspect and advantage of the present invention will be set forth in part in the description, and will partly become from the following description
Obtain substantially, or recognized by the practice of the present invention.
Brief description of the drawings
The above-mentioned and/or additional aspect and advantage of the present invention will become from description of the accompanying drawings below to embodiment is combined
Substantially and be readily appreciated that, wherein：
Fig. 1 is the flow chart that light field Three-dimensional Display quantifies the method for demarcation that is used for of the embodiment of the present invention；
Fig. 2 is that scene description language sets schematic diagram；
Fig. 3 is simple orifice optical model schematic diagram；
Fig. 4 is that ray tracing renders flow chart；
Fig. 5 is light field Three-dimensional Display demarcation level image schematic diagram；
Fig. 6 is that light field Three-dimensional Display quantifies level image schematic diagram；
Fig. 7 a~7d is to quantify sampling restructuring schematic diagram；
Fig. 8 is the calibrated curve map of light field Three-dimensional Display；
Fig. 9 is that light field Three-dimensional Display quantifies level image sampling restructuring schematic diagram；
Embodiment
Embodiments of the invention are described below in detail, the example of the embodiment is shown in the drawings, wherein from beginning to end
Same or similar label represents same or similar element or the element with same or like function.Below with reference to attached
The embodiment of figure description is exemplary, is only used for explaining the present invention, and is not considered as limiting the invention.
In the description of the invention, it is to be understood that term " first ", " second " are only used for describing purpose, and can not
It is interpreted as indicating or implying relative importance.
With reference to following description and accompanying drawing, it will be clear that these and other aspects of embodiments of the invention.In these descriptions
In accompanying drawing, some particular implementations in embodiments of the invention are specifically disclosed, to represent the implementation for implementing the present invention
Some modes of the principle of example, but it is to be understood that the scope of embodiments of the invention is not limited.On the contrary, the present invention
Embodiment includes all changes, modification and the equivalent fallen into the range of the spirit and intension of attached claims.
The present invention is described below in conjunction with accompanying drawing.
Fig. 1 is the flow chart that light field Three-dimensional Display quantifies the method for demarcation that is used for of the embodiment of the present invention.As shown in figure 1,
A kind of method for quantifying demarcation for light field Three-dimensional Display, comprises the following steps：
S1：According to field demand using can secondary development three-dimensional software generate several demarcation source image data.
Specifically, several demarcation source image datas are generated to comprise the following steps：
Usage scenario description language is configured (such as Fig. 2) to scene；
For the setting of camera model, simple orifice imaging model can be used to the geometrical optical characteristic of each camera model
To simulate (such as Fig. 3).It is determined that position of the pixel rendered in three-dimensional coordinate system is needed in record plane, it is determined that need to render
The locus of the affiliated optical centre of pixel, determines that light is projected according to the location of pixels and aperture position obtained above
Starting point and radiation direction, ray trace, completion render (such as Fig. 4).
S2：Several source image datas are carried out with separation sequence and constitutes pixel sequence, and weight is sampled to pixel sequence
Group obtains agreeing with the demarcation level image of resolution ratio.
Specifically, demarcation sampling restructuring comprises the following steps：
Measure two dimensional surface matrix display parameter index, regulation cylindrical lens array or microlens array and two dimensional surface square
Battle array display frontier distance；
It is determined that sampling index, calculates pixel sequence correspondence position, error abatement is carried out；
According to sampling index, correspondence cylindrical lens array or microlens array parameter are calculated, with two dimensional surface matrix display
Matched, the crosstalk that abatement Moire fringe is brought, obtain the demarcation level image matched with monitor resolution (as schemed
5)。
S3：Demarcation level image is uploaded to two dimensional surface matrix display, using D translation platform to cylindrical lens array or
Lenticule is finely adjusted, to reach best match effect.
In one embodiment of the invention, D translation platform is finely adjusted to cylindrical lens array or lenticule and uses software
Synchronisation control means.
S4：Repeat step S2 to S3, with generating quantification level image.
S5：Upload quantization level image to sample to effect to two dimensional surface matrix display, and using CCD, carry out
Data processing is compared, and the result quantified is detected to light field Three-dimensional Display effect.
Specifically, CCD samplings comprise the following steps：
Using the identical CCD of 3 parameters, and CCD is controlled using software synchronization, while gathering light field Three-dimensional Display number
According to；
Calculating obtains the putting position (distance and angle) needed for 3 CCD correspondence light field Three-dimensional Display targets；
The data collected are contrasted with light field Three-dimensional Display quantization figure (such as Fig. 6)；
Analyze the iterative processing that 3 obtained class data are distinguished；
Repeat iterative processing steps several times；
Cast out wrong data, export user data.
In one embodiment of the invention, in step s 5, CCD placement be with converge shooting and parallel ground side
Formula is placed.
In one embodiment of the invention, in step s 5, the method for comparing is pre- more than error to remove error
If the data of value, are solved, the data of three obtained dimension are integrated, and obtain virtual value with form and aspect scale.
To make those skilled in the art further understand the present invention, it will be described in detail by following examples.
As shown in figure 5, the target that black portions gather for needs in figure.In order to suitable for various wrong crosstalk patterns, bag
Saltus step mistake, burst error and Fault Distribution inequality are included, the present invention combines the advantage of D translation platform, it is proposed that the side of negative-feedback
Method, i.e., judge after being detected to collection target, negative-feedback regu- lation carried out to variable.The present invention uses negative-feedback regu- lation
Method is comprised the steps of：
(1) demarcation level image first is uploaded in two dimensional surface matrix display, CCD is determined according to demarcation level image position
Putting position.
(2) software synchronization CCD is shot, and carries out 255 rank quantification treatments to gathered data, takes its R value, G values, B values.
(3) logarithm is it is judged that software controls the movement of D translation platform after processing.
(4) step (3) is repeated.
(5) movement is stopped when meeting experimental precision.
As shown in Fig. 7 a~7d, RED sector is R dimension datas in figure, and figure Green part is blueness portion in G dimension datas, figure
It is divided into B dimension datas.In order to compress multi-dimensional data to two dimensional surface matrix display, the present invention proposes the side of sampling restructuring
Method, i.e., after being separated to multidimensional data, progress is spliced to form quantization level image (such as Fig. 7 d).The present invention is using sampling restructuring
Method is comprised the steps of：
(1) on the basis of demarcation is completed, demarcation level image parameter is obtained.
(2) multidimensional data is separated according to demarcation level image parameter, pixel physical coordinates is calculated, to physical coordinates
Compartmentalization processing is carried out, the pixel that can not be shown is eliminated.
(3) pixel sequence sorted is recombinated, is formed and quantify level image.
As shown in figure 8, image is effective coverage in figure center, figure center is outer due to two dimensional surface matrix display border
There is noise in influence.Its effective coverage is calibrated effect, but by inactive area it has also been discovered that demarcating effect and paying no attention to
Think, so to quantify light field Three-dimensional Display demarcation effect.The present invention quantifies scaling method and comprised the steps of：
(1) using can secondary development three-dimensional software generate several quantify demarcation source image data.
(2) several quantization demarcation source image datas are sampled using PaintShop, and pixel reorganization is obtained
To demarcation level image.
(3) quantization level image is uploaded to two dimensional surface matrix display, and sample quantization mark is carried out to effect using CCD
It is fixed.
In above-mentioned steps (2), the sampling recombination method that the present invention is used comprises the following steps：
As shown in figure 9, will quantify demarcation source image data lines up 3 × ki×jiArray, kiAnd jiRespectively column direction
Resolution ratio length, the resolution ratio length of line direction.
For each ki×jiArray, split in line direction, segmentation complete after spliced.
Primary after splicing quantifies level image directional resolution length of being expert at and has integral multiple extension, the image side of being expert at
To distortion.
Averagely compressed in line direction, resolution ratio is met two dimensional surface matrix display.
In above-mentioned steps (3), the sample quantization scaling method that the present invention is used comprises the following steps：
Calculate R dimensions, G dimensions, B and tie up angle and distance that three angle CCD are put, parallel ground, which is put, puts CCD and adjusted
Examination.
Three CCD are controlled using software synchronization, the light field Three-dimensional Display data of three dimensions are gathered.
Light field Three-dimensional Display data to three dimensions carry out data assessment, leave out invalid data, valid data are entered
Row integration is handled, and draws the parameter for quantifying demarcation.
According to embodiments of the present invention is used for the method that light field Three-dimensional Display quantifies demarcation, with advantages below：
(1) present invention calculates correct reflection and refraction angle using the method for ray tracing, can reach completely true
3D visual effect, correct for the error and interference from human factor in calibration process, and can in three form and aspect measurement amount
Change, significantly reduce quantization error.
(2) present invention can secondary development three-dimensional software using the method for simulating parallel shooting, in three-dimensional display system
Under different display patterns, the viewing effect obtained is also different.Although real image pattern is than virtual image pattern on viewing angle
It is slightly narrow, but the distance of its stereo-picture for being formed and observer are closer, therefore the virtual image can be better than in terms of depth perception
Display pattern, comparatively more research value.
(3) method that the present invention gathers light field Three-dimensional Display data using convergence, the public domain for converging collection is larger, warp
The light field three dimensional rendered images crossed after processing can carry more information.Therefore the present invention can be widely used in light field Three-dimensional Display
Quantify the technical field of demarcation.
(4) pixel subdivision of two dimensional surface matrix display, using the method for fine subregion, is 3 sons by the present invention
Pixel, analytical effect is carried out in the level of sub-pixel.Therefore light field Three-dimensional Display quantization scaling method is more smart than ever by the present invention
Really.
In addition, other compositions and the effect pair of the method for being used for the quantization demarcation of light field Three-dimensional Display of the embodiment of the present invention
All it is known for those skilled in the art, in order to reduce redundancy, does not repeat.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means to combine specific features, structure, material or the spy that the embodiment or example are described
Point is contained at least one embodiment of the present invention or example.In this manual, to the schematic representation of above-mentioned term not
Necessarily refer to identical embodiment or example.Moreover, specific features, structure, material or the feature of description can be any
One or more embodiments or example in combine in an appropriate manner.
Although an embodiment of the present invention has been shown and described, it will be understood by those skilled in the art that：Not
In the case of departing from the principle and objective of the present invention a variety of change, modification, replacement and modification can be carried out to these embodiments, this
The scope of invention is by claim and its equivalent limits.
Claims (6)
1. a kind of method for quantifying demarcation for light field Three-dimensional Display, it is characterised in that comprise the following steps：
S1：According to field demand using can secondary development three-dimensional software generate several demarcation source image data；
S2：Several described source image datas are carried out with separation sequence and constitutes pixel sequence, and the pixel sequence is taken out
Sample recombinates the demarcation level image for obtaining agreeing with resolution ratio；
S3：The demarcation level image is uploaded to two dimensional surface matrix display, using D translation platform to cylindrical lens array or
Lenticule is finely adjusted, to reach best match effect；
S4：Repeat step S2 to S3, with generating quantification level image；
S5：The quantization level image is uploaded to the two dimensional surface matrix display, and effect is sampled using CCD,
Data processing comparison is carried out, the result quantified is detected to light field Three-dimensional Display effect.
2. the method according to claim 1 for quantifying demarcation for light field Three-dimensional Display, it is characterised in that in step S1：
The three-dimensional software generation demarcation source image data of the secondary development is that usage scenario description language carries out aperture camera to camera
Parallel shoot of model sets what is obtained.
3. the method according to claim 1 for quantifying demarcation for light field Three-dimensional Display, it is characterised in that in step S5
In, the placement of the CCD is placed in the way of converging shooting and parallel ground.
4. the method according to claim 1 for quantifying demarcation for light field Three-dimensional Display, it is characterised in that in step S5
In, it is to use three sub-pixel samplings of three CCD respectively to a pixel that the use CCD, which carries out sampling to effect,.
5. the method according to claim 1 for quantifying demarcation for light field Three-dimensional Display, it is characterised in that in step S5
In, the method for the comparing is solved with form and aspect scale, obtained to remove the data that error is more than error preset value
The data of three dimensions are integrated, and obtain virtual value.
6. the method according to claim 1 for quantifying demarcation for light field Three-dimensional Display, it is characterised in that handled using shape
Software Matlab carries out separation sequence to several described source image datas.
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| CN109741375A (en) * | 2018-11-06 | 2019-05-10 | 三亚中科遥感研究所 | A kind of naked eye 3D model light field generation method and its device |
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