CN110149508A - A kind of array of figure generation and complementing method based on one-dimensional integrated imaging system - Google Patents
A kind of array of figure generation and complementing method based on one-dimensional integrated imaging system Download PDFInfo
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- CN110149508A CN110149508A CN201910448420.9A CN201910448420A CN110149508A CN 110149508 A CN110149508 A CN 110149508A CN 201910448420 A CN201910448420 A CN 201910448420A CN 110149508 A CN110149508 A CN 110149508A
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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
- H04N13/122—Improving the 3D impression of stereoscopic images by modifying image signal contents, e.g. by filtering or adding monoscopic depth cues
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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
- H04N13/128—Adjusting depth or disparity
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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
- H04N13/30—Image reproducers
- H04N13/302—Image reproducers for viewing without the aid of special glasses, i.e. using autostereoscopic displays
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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
- H04N13/30—Image reproducers
- H04N13/327—Calibration thereof
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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
- H04N2013/0081—Depth or disparity estimation from stereoscopic 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
- H04N2013/0085—Motion estimation from stereoscopic image signals
Abstract
A kind of array of figure generation and complementing method category naked eye 3D display technical field based on one-dimensional integrated imaging system, the present invention is according to geometric optics and the thought of DIBR, the visual point image of any position is simulated using depth map, image inside bulk cavity is filled first with optical flow method, then other cavities are filled up with Criminisi image repair algorithm;The advantage of both algorithms of present invention combination optical flow method with Criminisi image repair algorithm fills up image, both with reference to the image information of different frame in video, the arithmetic speed of Criminisi image repair algorithm is improved again, compared with only carrying out hole-filling with Criminisi image repair algorithm, under the setting of identical parameters, the present invention averagely saves for 45.448% time, and fills up better effect.
Description
Technical field
The invention belongs to naked eye 3D display technical fields, and in particular to a kind of array of figure based on one-dimensional integrated imaging system is raw
At and complementing method.
Background technique
1908, Nobel laureate Lippmann first proposed integration imaging.It is a kind of utilization lenticule battle array
Column record and the stereo display technique for reproducing three dimensional spatial scene.Integration imaging have continuous viewpoint, full parallax, without visual fatigue with
And the advantages that without ancillary equipment, is to the extensive concern by various countries.But integration imaging itself there is also some disadvantages with
It is insufficient.Integration imaging cost is high, is not suitable for large screen display, and the requirement to screen resolution is higher, empty to storage
Between and data-handling capacity all have higher requirements.One-dimensional integrated imaging solves the above problem to a certain extent.It is one-dimensional integrated
The vertical three-dimensional sense of integration imaging has been given up in imaging, in only the horizontal direction on have three-dimensional sense, greatly reduce data volume, increase
To the utilization rate of screen resolution.So one-dimensional integrated imaging technology can faster processing speed in the realization side of integration imaging
Show one's talent among method.
But currently, the three-dimensional film source based on one-dimensional integrated imaging is not common.It is suitble to one-dimensional integrated imaging to generate
Three-dimensional film source, it is necessary to carry out hole-filling.Criminisi algorithm is currently used image repair algorithm.The reparation algorithm
Algorithm complexity and picture size it is related with pixel block size, picture is bigger, and the Riming time of algorithm is longer;Unit pixel block
Smaller, the Riming time of algorithm is longer, but reparation is more careful, and repairing effect is better.Find that the algorithm can be preferably in practice
The cavity for being located at image border is repaired and spends the time few, and when being repaired to the bulk hole region inside picture,
Repair time is long, and repairing effect is not good enough.
Due to the defect of algorithm above, it is difficult to obtain ideal effect in practical applications, has much room for improvement.
Summary of the invention
For solve algorithm above defect, the present invention is intended to provide what a kind of Criminisi algorithm was combined with optical flow method
Hole-filling algorithm improves hole-filling in conjunction with the advantage of optical flow method and Criminisi algorithm and optical flow method to greatest extent
Accuracy rate and efficiency.
Array of figure based on one-dimensional integrated imaging system of the invention generates and complementing method, including the following steps:
1.1 set original image as Ioriginal-k, depth map Hk, the viewpoint figure with cavity of generation is Wk-r,
Wherein: k indicates kth frame image in video;R indicates that r-th of viewpoint, the value range of r are 1~2*N, and N is half view
Points;
1.1.1 according to required depth effect, what default human eye can be experienced goes out screen depth and enters to shield depth, by geometry
Optics obtains:
M/B=P/ (P+D)
Wherein: B is eyes spacing;M is parallax, indicates the horizontal distance between right and left eyes picture;P is what human eye can be experienced
Scenery depth;D is the distance between observer and screen;
Later, the scenery depth P that human eye can be experienced carries out identity transformation, becomes pixel by millimeter: through Conversion of measurement unit
Maximum positive parallax afterwards, the parallax will be generated into screen effect: maxPM=maxM* (a/A);The negative view of maximum after Conversion of measurement unit
Difference, which, which will lead to out, shields effect:
MaxNM=-abs (maxM) * (a/A)
Wherein: abs (maxM)=maxP*B/ (D-maxP);A is the horizontal resolution of screen;A is that the level of screen is wide
Degree;
1.1.2 in the scenery depth that depth value uniform quantization to human eye can be experienced, it is translated into parallax value, is converted
Formula are as follows:
D (i, j)=(maxNM-maxPM)/255*H (i, j)+maxPM
Wherein: d (i, j) is the corresponding parallax value of coordinate (i, j) point;H (i, j) is depth value corresponding to point (i, j);
It follows that when depth value is 0, corresponding positive parallax maxPM;When depth value is 255, corresponding negative parallax
maxNM;
1.1.3 each pixel in original video image is translated according to parallax value, any viewpoint figure can be obtained
Picture:
IN-x+1(i, j-d (i, j) * x/2N)=Ioriginal-k(i,j)、IN+x(I, j+d (i, j) * x/2N)=Ioriginal-k
(i,j)
Viewpoint is numbered according to opposite original image direction from left to right, viewpoint sum is 2*N, which is the
X visual point image;
1.2 statistics are in figure Wk-rIn, by Ioriginal-kIt is mapped to Wk-rThe coordinate of the number (n) of the point of (i, j) and they
Ioriginal-k(x1,y1)、Ioriginal-k(x2,y2)、...Ioriginal-k(xn,yn);
As n=0, W is enabledk-r(i, j)=0, as empty point;
As n=1, W is enabledk-r(i, j)=Ioriginial-k(x,y);
As n=2, enable
As n > 2, I is takenoriginal-k(x1,y1)、Ioriginal-k(x2,y2)、...Ioriginal-k(xn,yn) in depth most
Big value Horiginal-k(i, j) enables Wk-r(i, j)=Ioriginal-k(xp,yp)(1≤p≤n);
The point of n=0, the i.e. pixel value of cavity point are set as 0 by 1.3, and other is 255, obtains maskk-rImage;maskk-rFigure
As will intuitively reflect Wk-rEmpty distribution situation in image;
1.4. hole-filling is carried out to the viewpoint figure tentatively generated using optical flow method to include the following steps:
1.4.1 extracting image maskk-rThe edge in internal large area cavity, if the marginal point in the i-th row cavity is respectively
(i, a) and (i, b), if a <b, if reference frame picture is the third frame in original video, i.e. image Ioriginal-3, utilize LK optical flow method
I.e. sparse optical flow method is to Wk-rWith figure Ioriginal-3It is calculated, obtains each pixel in both the horizontal and vertical directions
Movement velocity, respectively ofv and ofh;
1.4.2 will (i, a) left side with (i, b) on the right side of depth value be compared, if (i, a) on the left of depth value it is small, then
Illustrate that it is farther at a distance from observer, is the background parts of image;
1.4.3 the light stream value for estimating hollow sectors takes (i, a) the horizontal movement speed and vertical movement of 7 pixels in left side
Speed is averaged, the horizontal movement speed and vertical movement speed as row cavity, it may be assumed that
1.4.4 the horizontal displacement for setting the displacement of corresponding pixel points as Δ x, Δ y, as a < j <b, at cavity are as follows: Δ x=
Ofh (i, j) × 10, vertical displacement are as follows: Δ y=ofv (i, j) × 10 acquires cavity and is in Ioriginal-3Mapping block: Wk-r(i,
J)=Ioriginal-3(i+Δx,j+Δy);
1.5 are included the following steps: using Criminisi image repair algorithm process image
1.5.1 Criminisi image repair algorithm process W is usedk-rImage, since original image size is 436*1024 pixel,
The unit that the unit pixel block in Criminisi image repair algorithm is 12--20 pixel as radius is set according to original image size
Block.
The present invention is in such a way that a kind of optical flow method is in conjunction with Criminisi image repair algorithm come filling cavity.Firstly,
According to geometric optics and the thought of DIBR, the visual point image of any position is simulated using depth map.In this process, to mapping
Point on to viewpoint figure is classified, and keeps the viewpoint figure generated more accurate.Secondly, when carrying out hole-filling, first with
Optical flow method is filled image inside bulk cavity.Empty edge is extracted, the depth value of both sides of edges is compared, takes larger one
The light stream value of the light stream value estimation hollow sectors of side, to calculate mapping block of the hollow sectors on reference frame.Finally, using again
Criminisi image repair algorithm fills up other cavities.
The advantage of both algorithms of present invention combination optical flow method with Criminisi image repair algorithm fills out image
It mends, not only with reference to the image information of different frame in video, but also improves the arithmetic speed of Criminisi image repair algorithm, than
It rises and only carries out hole-filling with Criminisi image repair algorithm, under the setting of identical parameters, the present invention averagely saves the time
45.448%, and fill up better effect.
1 original Criminisi image repair algorithm of table is compared with the method for the present invention used time
Detailed description of the invention
Fig. 1 is the flow chart of array of figure generation and complementing method based on one-dimensional integrated imaging system
Fig. 2 is the preliminary viewpoint figure with cavity generated
Fig. 3 is by optical flow method treated viewpoint figure
Fig. 4 is by the viewpoint figure after Criminisi algorithm process
Fig. 5 is only by the viewpoint figure after Criminisi algorithm process
Specific embodiment
Core of the invention content is: when carrying out hole-filling, using the Optic flow information in video, filling up figure in advance
As the large area cavity of center portion, Criminisi image repair algorithm is recycled to carry out hole-filling.Compared to
Criminisi image repair algorithm, this method averagely saves for 45.448% time, and repairing effect is more preferable.Such as Fig. 4, Fig. 5 institute
Show.
To make the purpose of the present invention, technical solution and advantage are clearer, and with reference to the accompanying drawing and example is done further
Narration in detail:
A kind of array of figure generation and complementing method based on one-dimensional integrated imaging system, such as Fig. 1, including the following steps:
1.3 set original image as Ioriginal-k, depth map Hk, the viewpoint figure with cavity of generation is Wk-r,
Wherein: k indicates kth frame image in video;R indicates that r-th of viewpoint, the value range of r are 1~2*N, and N is half view
Points;
1.1.1 according to required depth effect, what default human eye can be experienced goes out screen depth and enters to shield depth, by geometry
Optics obtains:
M/B=P/ (P+D)
Wherein: B is eyes spacing;M is parallax, indicates the horizontal distance between right and left eyes picture;P is what human eye can be experienced
Scenery depth;D is the distance between observer and screen;
Later, the scenery depth P that human eye can be experienced carries out identity transformation, becomes pixel by millimeter: through Conversion of measurement unit
Maximum positive parallax afterwards, the parallax will be generated into screen effect: maxPM=maxM* (a/A);The negative view of maximum after Conversion of measurement unit
Difference, which, which will lead to out, shields effect:
MaxNM=-abs (maxM) * (a/A)
Wherein: abs (maxM)=maxP*B/ (D-maxP);A is the horizontal resolution of screen;A is that the level of screen is wide
Degree;
1.1.2 in the scenery depth that depth value uniform quantization to human eye can be experienced, it is translated into parallax value, is converted
Formula are as follows:
D (i, j)=(maxNM-maxPM)/255*H (i, j)+maxPM
Wherein: d (i, j) is the corresponding parallax value of coordinate (i, j) point;H (i, j) is depth value corresponding to point (i, j);
It follows that when depth value is 0, corresponding positive parallax maxPM;When depth value is 255, corresponding negative parallax
maxNM;
1.1.3 each pixel in original video image is translated according to parallax value, any viewpoint figure can be obtained
Picture:
IN-x+1(i, j-d (i, j) * x/2N)=Ioriginal-k(i,j)、IN+x(I, j+d (i, j) * x/2N)=Ioriginal-k
(i,j)
Viewpoint is numbered according to opposite original image direction from left to right, viewpoint sum is 2*N, which is the
X visual point image;
1.4 statistics are in figure Wk-rIn, by Ioriginal-kIt is mapped to Wk-rThe coordinate of the number (n) of the point of (i, j) and they
Ioriginal-k(x1,y1)、Ioriginal-k(x2,y2)、...Ioriginal-k(xn,yn);
As n=0, W is enabledk-r(i, j)=0, as empty point;
As n=1, W is enabledk-r(i, j)=Ioriginial-k(x,y);
As n=2, enable
As n > 2, I is takenoriginal-k(x1,y1)、Ioriginal-k(x2,y2)、...Ioriginal-k(xn,yn) in depth most
Big value Horiginal-k(i, j) enables Wk-r(i, j)=Ioriginal-k(xp,yp)(1≤p≤n);
The point of n=0, the i.e. pixel value of cavity point are set as 0 by 1.3, and other is 255, obtains maskk-rImage;maskk-rFigure
As will intuitively reflect Wk-rEmpty distribution situation in image;
2.1, which carry out hole-filling to the viewpoint figure tentatively generated using optical flow method, includes the following steps:
2.1.1 extracting image maskk-rThe edge in internal large area cavity, if the marginal point in the i-th row cavity is respectively
(i might as well set a <b a) with (i, b), if reference frame picture is the third frame in original video, i.e. image Ioriginal-3, utilize LK light
Stream method, that is, sparse optical flow method is to Wk-rWith figure Ioriginal-3It is calculated, obtains each pixel in horizontal and vertical directions
On movement velocity, respectively ofv and ofh;
2.1.2 will (i, a) left side with (i, b) on the right side of depth value be compared, if (i, a) on the left of depth value it is small, then
Illustrate that it is farther apart from observer, is the background parts of image;
2.1.3 the light stream value for estimating hollow sectors takes (i, a) the horizontal movement speed and vertical movement of 7 pixels in left side
Speed is averaged, the horizontal movement speed and vertical movement speed as row cavity, it may be assumed that
2.1.4 the horizontal displacement for setting the displacement of corresponding pixel points as Δ x, Δ y, as a < j <b, at cavity are as follows: Δ x=
Ofh (i, j) × 10, vertical displacement are as follows: Δ y=ofv (i, j) × 10 acquires cavity and is in Ioriginal-3Mapping block: Wk-r(i,
J)=Ioriginal-3(i+Δx,j+Δy);
3.1 are included the following steps: using Criminisi image repair algorithm process image
3.1.1 algorithm process W is repaired with Criminisik-rImage.Since original image size is 436*1024 in the present invention
Pixel, according to original image size set the unit pixel block in Criminisi image repair algorithm as radius be 12--20 pixel
Units chunk.
Claims (1)
1. a kind of array of figure based on one-dimensional integrated imaging system generates and complementing method, it is characterised in that include the following steps:
1.1 set original image as Ioriginal-k, depth map Hk, the viewpoint figure with cavity of generation is Wk-r,
Wherein: k indicates kth frame image in video;R indicates that r-th of viewpoint, the value range of r are 1~2*N, and N is half viewpoint number;
1.1.1 according to required depth effect, what default human eye can be experienced goes out screen depth and enters to shield depth, by geometry light
Learn to:
M/B=P/ (P+D)
Wherein: B is eyes spacing;M is parallax, indicates the horizontal distance between right and left eyes picture;P is the scenery that human eye can be experienced
Depth;D is the distance between observer and screen;
Later, the scenery depth P that human eye can be experienced carries out identity transformation, becomes pixel by millimeter: after Conversion of measurement unit
Maximum positive parallax, the parallax will be generated into screen effect: maxPM=maxM* (a/A);Maximum negative parallax after Conversion of measurement unit, should
Parallax, which will lead to out, shields effect:
MaxNM=-abs (maxM) * (a/A)
Wherein: abs (maxM)=maxP*B/ (D-maxP);A is the horizontal resolution of screen;A is the horizontal width of screen;
1.1.2 in the scenery depth that depth value uniform quantization to human eye can be experienced, it is translated into parallax value, conversion is public
Formula are as follows:
D (i, j)=(maxNM-maxPM)/255*H (i, j)+maxPM
Wherein: d (i, j) is the corresponding parallax value of coordinate (i, j) point;H (i, j) is depth value corresponding to point (i, j);
It follows that when depth value is 0, corresponding positive parallax maxPM;When depth value is 255, corresponding negative parallax maxNM;
1.1.3 each pixel in original video image is translated according to parallax value, any visual point image can be obtained:
IN-x+1(i, j-d (i, j) * x/2N)=Ioriginal-k(i,j)、IN+x(I, j+d (i, j) * x/2N)=Ioriginal-k(i,j)
Viewpoint is numbered according to the direction of opposite original image from left to right, viewpoint sum is 2*N, which is x-th
Visual point image;
1.2 statistics are in figure Wk-rIn, by Ioriginal-kIt is mapped to Wk-rThe coordinate of the number (n) of the point of (i, j) and they
Ioriginal-k(x1,y1)、Ioriginal-k(x2,y2)、...Ioriginal-k(xn,yn);
As n=0, W is enabledk-r(i, j)=0, as empty point;
As n=1, W is enabledk-r(i, j)=Ioriginial-k(x,y);
As n=2, enable
As n > 2, I is takenoriginal-k(x1,y1)、Ioriginal-k(x2,y2)、...Ioriginal-k(xn,yn) in depth maximum value
Horiginal-k(i, j) enables Wk-r(i, j)=Ioriginal-k(xp,yp)(1≤p≤n);
The point of n=0, the i.e. pixel value of cavity point are set as 0 by 1.3, and other is 255, obtains maskk-rImage;maskk-rImage
It will intuitively reflect Wk-rEmpty distribution situation in image;
1.4. hole-filling is carried out to the viewpoint figure tentatively generated using optical flow method to include the following steps:
1.4.1 extracting image maskk-rThe edge in internal large area cavity, if the marginal point in the i-th row cavity be respectively (i, a)
(i, b), if a <b, if reference frame picture is the third frame in original video, i.e. image Ioriginal-3, utilize LK optical flow method, that is, dilute
Optical flow method is dredged to Wk-rWith figure Ioriginal-3It is calculated, obtains the movement of each pixel in both the horizontal and vertical directions
Speed, respectively ofv and ofh;
1.4.2 will (i, a) left side with (i, b) on the right side of depth value be compared, if (i, a) on the left of depth value it is small, then illustrate
It is farther at a distance from observer, is the background parts of image;
1.4.3 the light stream value for estimating hollow sectors takes (i, a) the horizontal movement speed of 7 pixels in left side and vertical movement speed
Degree, is averaged, the horizontal movement speed and vertical movement speed as row cavity, it may be assumed that
1.4.4 the horizontal displacement for setting the displacement of corresponding pixel points as Δ x, Δ y, as a < j <b, at cavity are as follows: Δ x=ofh
(i, j) × 10, vertical displacement are as follows: Δ y=ofv (i, j) × 10 acquires cavity and is in Ioriginal-3Mapping block: Wk-r(i,j)
=Ioriginal-3(i+Δx,j+Δy);
1.5 are included the following steps: using Criminisi image repair algorithm process image
1.5.1 Criminisi image repair algorithm process W is usedk-rImage, since original image size is 436*1024 pixel, root
The unit that the unit pixel block in Criminisi image repair algorithm is 12--20 pixel as radius is set according to original image size
Block.
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