CN105578171B - A kind of image-signal processing method and device - Google Patents
A kind of image-signal processing method and device Download PDFInfo
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Abstract
The invention discloses a kind of image-signal processing method and device, it is related to image display arts, the reverse parallax in inversion area can be reduced, while improves the stereo display effect in non-inversion area.This method includes：Obtain the depth information of picture signal and described image signal；It is N number of sub- view signal with different depth informations by described image signal transacting；N number of sub- view signal is treated as multi views signal, wherein, the parallax between every two neighboring sub- view is gradually reduced, and the N is more than 1.
Description
The application is on 04 01st, 2014 entitled " a kind of image-signal processing method and device " that proposes
The divisional application of Chinese invention patent application 201410128350.6.
Technical field
The present invention relates to stereo display technique field, more particularly to a kind of image-signal processing method and device.
Background technology
Auto-stereo display is based on bore hole 3D Display Techniques.Bore hole 3D Display Techniques utilize the left eye with parallax to regard
(images of left and right eyes view is also referred to as sub- view, for a user, and every sub- view correspondence one in display is regarded for figure and right-eye view
Point), alternately shown with certain frequency, because left-eye view and right-eye view have parallax, so that the left-eye view with parallax
After being shown with right-eye view, stereoscopic vision is comprehensively produced through remarkable brain.
In Auto-stereo display, the common 2D signal received or two viewpoint three dimensional image signals are converted into N
Parallax between the sub- view of individual viewpoint, and adjacent sub- view is identical, by the sub- View synthesis of N number of viewpoint is multi views and shows
Show, because two sub- views of arbitrary neighborhood all have parallax, then user is in each vision area (viewing area of adjacent two sub- view
Correspond to a vision area) in can watch stereoscopically displaying images.
As shown in Figure 1, if the signal received is converted into N number of sub- view signal, 1,2,3 ..., N-2, N-1,
After N number of sub- view is arranged successively, then the arrangement since 1 again；Due to there is parallax per two neighboring sub- view, then first regards
Then there is N-1 parallax between figure and n-th view；As can be seen here, between two adjacent display cycles, upper a cycle
The sub- view of n-th and first sub- view in this cycle between (two adjacent viewpoints, a vision area) exist N-2 it is anti-
To parallax, as inversion area, user can not watch normal stereo-picture in this region.As shown in Figure 1, a, b, c
Place can be normally watched at stereo-picture, d then can not normally watch stereo-picture for inversion area.As shown in Figure 2, it is assumed that 1 son is regarded
The steric information of figure signal is D0, the parallax of two adjacent pixels is D, and the inverse parallax for entering right and left eyes in the inversion area is
| (N-1) × D |, display effect has serious reversely ghost image for image.
Furthermore, each user is different to the susceptibility of stereoscopic display signal, the third dimension of each user by degree not yet
Together；Therefore, under same parallax effect, some users may think that parallax is excessive, and stereoscopic visual effect is excessively strong, and eyes pole holds
It is easily tired；Some users may think that parallax is too small, and stereoscopic visual effect is not strong enough.
The content of the invention
The present invention provides a kind of image-signal processing method and device, can reduce the reverse parallax in inversion area, change simultaneously
The stereo display effect in Shan Fei inversions area.
Concrete technical scheme provided in an embodiment of the present invention is as follows：
Obtain the depth information of picture signal and described image signal；
It is N number of sub- view signal with different depth informations by described image signal transacting, wherein, it is deep by changing
The gray value that each in information gray-scale map is put is spent, the parallax between making per two neighboring sub- view signal gradually increases, and N is more than 1；
N number of sub- view signal is treated as multi views signal.
Based on above-mentioned technical proposal, in the embodiment of the present invention, according to the depth information of the picture signal of acquisition, each son is adjusted
The depth information of view signal so that each sub- view has different depth informations, and suitable according to the arrangement of each sub- view signal
Sequence, the parallax between making per two neighboring sub- view is gradually reduced；In the prior art, the parallax between every two neighboring sub- view
It is identical, be for example all D, then inversion area between two neighboring display cycle (N number of sub- view is shown in each display cycle)
Parallax is N-1 reversely parallaxes, i.e., reverse (N-1) D, and in the present invention, due to the parallax between per two neighboring sub- view
It is gradually reduced and (can be described as D, K2D, K3D ..., K (N-1) D, wherein 1>K2>K3>….>K (N-1)), then two neighboring display
The parallax in the inversion area between the cycle is certainly less than reverse (N-1) D so that in the multi views signal of synthesis, two neighboring aobvious
Show that the inverse parallax in the inversion area between the cycle reduces, so that the influence of inversion effect is reduced, and because of phase in multi views signal
The parallax of adjacent two viewpoints tapers off change, can meet multiple beholders different to third dimension susceptibility and watch simultaneously, so that
Improve stereo display effect.
Brief description of the drawings
Fig. 1 is normal visual parallax in visible area in the prior art and inverse parallax schematic diagram；
Fig. 2 is inverse parallax schematic diagram in visible area in the prior art；
Fig. 3 is converted to the process signal of multiple views signal for 2D signal or two viewpoint three dimensional image signals in the prior art
Figure；
Fig. 4 is image-signal processing method schematic flow sheet in the embodiment of the present invention；
The schematic diagram that Fig. 5 is gradually reduced for parallax in visible area in the embodiment of the present invention；
The schematic diagram that Fig. 6 linearly reduces for parallax in the embodiment of the present invention；
Fig. 7 is parallax change procedure schematic diagram in the embodiment of the present invention；
Fig. 8 is parallax numerical value change schematic diagram in the embodiment of the present invention；
Fig. 9 is the schematic diagram of the non-linear reduction of parallax in the embodiment of the present invention；
Figure 10 is parallax nonlinear change process schematic in the embodiment of the present invention；
Figure 11 is parallax numerical value nonlinear change schematic diagram in the embodiment of the present invention；
The schematic diagram of another non-linear reduction of parallax in Figure 12 embodiment of the present invention；
Figure 13 is another parallax nonlinear change process schematic in the embodiment of the present invention；
Figure 14 is another parallax numerical value nonlinear change schematic diagram in the embodiment of the present invention；
Figure 15 is image signal processing apparatus structural representation in the embodiment of the present invention.
Embodiment
In order to reduce the reverse parallax in inversion area, improve the stereo display effect in non-inversion area, the embodiment of the present invention is provided
A kind of image-signal processing method and device.
The preferred embodiment of the present invention is described in detail below in conjunction with the accompanying drawings.
Two dimensional image signal or two viewpoint three dimensional image signals are first converted into two dimensional image signal, and (Chang Weiyuan two dimensional images are believed
Number) and respective depth information (Depth), depth information is represented by(wherein, e is between two camera lens of virtual video camera
Away from being usually taken to be human eye interocular distance, i.e. 65mm, f is virtual video camera focal length, D is parallax, Depth information and parallax are into anti-
Exist and in free stereo signal processing algorithm, its relevant parameter is mostly identical with actual 3D video cameras than, virtual video camera),
Different sub- view signals can be obtained by changing depth information, finally again by this secondary multi views of a little view signal synthesis one
Signal.
Depth information Depth is equally represented with gray scale diagram form, and the minimum value and maximum of depth information are corresponded to respectively
0 for gray-scale map and 255, other depth informations are corresponding in turn to as each gray value in gray-scale map in proportion.2D signal or
Two viewpoint three dimensional image signals are converted to multiple views signal process as shown in figure 3, two dimensional image signal or two viewpoint 3-D views
The combination of signal first converted new two dimensional image signal and Depth information, new two dimensional image signal is typically two-dimentional with original
Picture signal is identical, in the new sub- view signal of generation, need to only change Depth information and (change the ash that each in gray-scale map is put
Angle value) different sub- view signals can be obtained, from Depth and parallax relation, change Depth information and change
Parallax.Sub- view signal 1 is generated by new two dimensional image signal and Depth1, and sub- view signal 2 is by new two dimensional image signal
With Depth2 generations, sub- view signal N is generated by two dimensional image signal and DepthN, wherein Depth1, Depth2 ...,
DepthN is differed.Inventor's discovery, in the prior art, the depth information difference between two adjacent sub- view signals
Be identical, be represented by Depth2-Depth1=Depth3-Depth2=...=DepthN-Depth (N-1), i.e., it is N number of
In sub- view signal, the parallax between every two neighboring sub- view is identical, furtherly, that is, in N number of sub- view signal, correspondence
In the pixel of same pixel coordinate, the parallax phase in every two neighboring sub- view between two pixels of correspondence same pixel coordinate
Together.
In following examples, based on above-mentioned principle, in each sub- view signal that acquisition is caused by percentage regulation information, often
Parallax between two neighboring sub- view signal is different, to reach that the inverse parallax in inversion area and offer are more in reduction multi views signal
Plant the purpose of different parallax visual experiences.
In first embodiment of the invention, as shown in Figure 4 there is provided a kind of image-signal processing method, the tool of this method
Body process is as follows：
Step 401：Obtain picture signal and the depth information of the picture signal.
Step 402：Picture signal is processed as N number of sub- view signal with different depth informations.
Step 403：N number of sub- view signal is treated as multi views signal, wherein, per two neighboring sub- view signal it
Between parallax be gradually reduced, N be more than 1.
Wherein, for two viewpoint three dimensional image signals, using a view signal as reference, according between two view signals
Difference is calculated as the depth information of the view signal of reference, is obtained according to this as the view signal and depth information of reference
Much individual sub- view signals.
During by two dimensional image signal or two viewpoint three dimensional image signals generation multi views signal (i.e. free stereo signal), in
Between can generate N number of sub- view signal, N is more than 1, when generating this little view signal, and every sub- view signal can all be corresponded to not
Same Depth information, need to only change Depth information (changing the gray value that each in Depth gray-scale maps is put), you can obtain not
Same sub- view signal, with parallax inversely, it is to change parallax to change Depth information to Depth information, therefore is changed
The different sub- view signals of Depth information acquisitions are also believed to change the different sub- view signals of parallax acquisition.
By changing each sub- view signal of Depth information acquisitions so that between the Depth per two adjacent sub- view signals
Difference differ, but gradually increase, i.e., parallax is gradually reduced.
In the embodiment of the present invention, the mode of the depth information of adjustment two dimensional image signal or two viewpoint three dimensional image signals has
It is a variety of, it is only necessary to a variety of different depth informations can be obtained, wherein every kind of depth information one sub- view signal of correspondence.
It is preferred that after the depth information of picture signal and picture signal is obtained, distinguishing ratio at different zoom
The gray value of each pixel of the picture signal depth information is zoomed in and out, each sub- view signal is obtained；
Or,
Distinguish gray value of the ratio to each pixel in the regional area of the depth information of picture signal at different zoom
Zoom in and out, obtain each sub- view signal.
Wherein, the change of the depth information per adjacent sub- view signal and being changing into for the parallax per adjacent sub- view signal
When inverse relation, the i.e. depth information per adjacent sub- view signal are in the variation tendency increased, regarding per adjacent sub- view signal
Difference is in the trend reduced.
It is multiple with different depth information by percentage regulation information acquisition in the embodiment of the present invention based on the feature
Sub- view signal so that the difference of the depth information between per two neighboring sub- view signal is differed, i.e., by adjacent two
Each error image that the depth information of sub- view signal makes the difference acquisition is different, also allows for the parallax of every adjacent sub- view signal not
Together.
It is preferred that many sub- view signals of percentage regulation information acquisition, are corresponded to, correspondence is identical in each sub- view signal
In each pixel of pixel coordinate, the parallax between two pixels per two neighboring sub- view correspondence same pixel coordinate gradually subtracts
It is small；The depth information of adjacent sub- view signal is made the difference in each error image of acquisition, the picture of each pixel of pixel coordinate identical
Plain value gradually increases.
For example, as shown in Figure 5, if the parallax of the first sub- view signal of acquiescence and the second sub- view signal is D, one
It is individual can be in apparent cycle, the parallax of two neighboring sub- view signal is respectively D, k1D、k2D、……、kN-3D、kN-2D, wherein, k1、
k2、……、kN-3And kN-2For variation coefficient, and 1>k1>k2>……>kN-3>kN-2, one can apparent cycle last sub- view
The parallax between the pixel in pixel and first sub- view signal of lower cycle in signal is | (1+k1+......+kN-3+kN-2)D
|, than | (N-1) D | it is much smaller, it can weaken inversion area inversion effect significantly, and the visual experience of a variety of different parallaxes can be provided,
If the parallax of first sub- view signal and second sub- view signal reduces, the inversion effect in inversion area can further weaken.
Preferably, the parallax between every two neighboring sub- view signal is gradually reduced, and has following two situations：
Parallax between per two neighboring pixel linearly reduces；
Or,
The non-linear reduction of parallax between per two neighboring pixel.
It is preferred that in each sub- view signal in each pixel of correspondence same pixel coordinate, per two neighboring sub- view correspondence
The non-linear reduction of parallax between two pixels of same pixel coordinate, can be that the parallax between every two neighboring pixel meets f (x)
=Ax2+ Bx+C, wherein, x represents the parallax coordinate of two neighboring sub- view signal, N-1 sub- view image signals and N
The parallax coordinate of individual sub- view image signal is N-1.
For example, as shown in Figure 6, the parallax of the 1st and 2 viewpoints is that the viewpoints of D, the 2nd and 3 parallax is k1The viewpoints of D, the 3rd and 4 are regarded
Difference is k2D, the like, N-1 viewpoints and N viewpoints parallax are kN-2D, the reduction of parallax linearly changes, i.e. D-k1D=k1D-
k2D=...=kN-3D-kN-2D, this change straight line coincidence formula f (x)=Ax+B, wherein, x is parallax coordinate, the 1st sub- view
Signal and the parallax coordinate of the 2nd sub- view signal are that the parallax coordinate of the 1, the 2nd sub- view signal and the 3rd sub- view signal is 2, according to
Secondary to analogize, the parallax coordinate of N-1 viewpoints and N viewpoints is N-1, and f (x) represents parallax size, and the positive and negative of A determines that straight line is
Rise straight line and still decline straight line, A is negative value herein, and A value is more big, decline slower, be i.e. the rate of change of parallax is smaller.This
In the mode of kind, parallax change is more uniform, parallax regular change from big to small.As shown in Figure 7, with 5 sub- view signals
Exemplified by, it is assumed that the steric information of 1 sub- view signal is D0, the parallax of the 1st and 2 sub- view signals is the sub- view signals of D, the 1st and 2
Parallax be the sub- view signals of D, the 2nd and 3 parallax be the sub- view signals of 0.8D, the 3rd and 4 parallax be 0.6D, the 4th and 5 son
The parallax of view signal is 0.4D, and inversion area parallax is | 2.8D |, now the A in f (x)=Ax+B is 1.2 for -0.2, B, then public affairs
Formula is f (x)=- 0.2x+1.2, as shown in Figure 8.
Again for example, as shown in figure 9, in each sub- view signal in each pixel of pixel coordinate identical, per two neighboring pixel
Between parallax it is non-linear reduce, this change curve coincidence formula：F (x)=Ax2+ Bx+C, wherein, x is parallax coordinate, and the 1st son is regarded
Figure signal and the parallax coordinate of the 2nd sub- view signal are that the parallax coordinate of the 1, the 2nd sub- view signal and the 3rd sub- view signal is 2,
The like, the parallax coordinate of N-1 view signals and the sub- view signals of N is N-1, and f (x) is parallax size,'s
Positive and negative to determine that curve is ascending curve or decline curve, curve is decline curve herein, thenFor negative value, 2A value is determined
The slow degree of curve decline is determined, 2A is bigger, then what is declined is rapider, i.e. the rate of change of parallax is bigger, and 2A is smaller, then declines
It is slower, i.e. the rate of change of parallax is smaller, in such a mode, and the viewpoint number that the three-dimensional depth of reservation is big is few, three-dimensional depth
Small viewpoint number is more.(there are 5 sub- view signals) so that there is the arrangement of 5 viewpoints a display cycle as an example, it is assumed that (1 son is regarded 1 viewpoint
Figure signal) steric information be D0, the 1st and 2 viewpoint parallaxes are that the viewpoints of D, the 1st and 2 parallax is that the viewpoints of D, the 2nd and 3 parallax is 0.7D,
3rd and 4 viewpoint parallaxes are that the viewpoints of 0.5D, the 4th and 5 parallax is 0.4D, and inversion area parallax is | 2.6D |, as shown in Figure 10, now f
(x)=Ax2A in+Bx+C is that 0.05, B is that -0.45, C is 1.4, then formula is f (x)=0.05x2- 0.45x+1.4, such as accompanying drawing
Shown in 11.
Again for example, as shown in Figure 12, in each sub- view signal, in each pixel of correspondence same pixel coordinate, per adjacent
The non-linear reduction of parallax in two sub- views between two pixels of correspondence same pixel coordinate, this change curve coincidence formula：f
(x)=Ax2+ Bx+C, in such a mode, the viewpoint number that the three-dimensional depth of reservation is big is more, and the small viewpoint number of three-dimensional depth is few.With
One display cycle has 5 viewpoints (to have 5 sub- view signals) exemplified by arranging, it is assumed that 1 viewpoint (1 sub- view signal) steric information
For D0, the 1st and 2 viewpoint parallaxes are that the viewpoints of D, the 2nd and 3 parallax is that the viewpoints of 0.9D, the 3rd and 4 parallax is that the viewpoints of 0.7D, the 4th and 5 are regarded
Difference is 0.4D, and inversion area parallax is | 3D |, as shown in Figure 13.Now f (x)=Ax2A is 0.05, C for -0.05, B in+Bx+C
For 1, then formula is f (x)=- 0.05x2+ 0.05x+1, as shown in Figure 14.
When synthesizing multi views signal (i.e. free stereo signal), each picture of same coordinate position in each sub- view signal is obtained
Element, is arranged in order to form a display cycle, after being arranged in order for each location of pixels according to the order of each sub- view
Synthesize multi views signal.
Based on identical principle, in second embodiment of the invention, there is provided a kind of processing of picture signal as shown in Figure 15
Device, the specific implementation of the device can be found in the description of above method part, repeats part and repeats no more, the device is mainly wrapped
Include：
Acquisition module 1501, the depth information for obtaining picture signal and described image signal；
First processing module 1502, for described image signal transacting to be regarded for N number of son with different depth informations
Figure signal；
Second processing module 1503, for N number of sub- view signal to be treated as into multi views signal, wherein, per phase
Parallax between adjacent two sub- views is gradually reduced, and the N is more than 1.
Preferably, Second processing module specifically for：
Parallax between making per two neighboring sub- view linearly reduces；
Or,
The non-linear reduction of parallax between making per two neighboring sub- view.
Preferably, Second processing module specifically for：
When N number of sub- view signal is treated as into multi views signal, make per the parallax f (x) between two neighboring sub- view=
Ax2+ Bx+C, wherein, x represents the parallax coordinate of two neighboring sub- view signal, and N-1 sub- view signals are regarded with n-th
The parallax coordinate of figure signal is N-1.
Specifically, first processing module specifically for：
Ratio is zoomed in and out to the gray value of each pixel of the depth information of picture signal at different zoom respectively,
Obtain each sub- view signal；
Or,
Distinguish gray value of the ratio to each pixel in the regional area of the depth information of picture signal at different zoom
Zoom in and out, obtain each sub- view signal.
Based on above-mentioned technical proposal, in the embodiment of the present invention, according to the depth information of the picture signal of acquisition, each son is adjusted
The depth information of view signal so that each sub- view has different depth informations, and suitable according to the arrangement of each sub- view signal
Sequence, the parallax between making per two neighboring sub- view is gradually reduced；In the prior art, the parallax between every two neighboring sub- view
It is identical, be for example all D, then inversion area between two neighboring display cycle (N number of sub- view is shown in each display cycle)
Parallax is N-1 reversely parallaxes, i.e., reverse (N-1) D, and in the present invention, due to the parallax between per two neighboring sub- view
It is gradually reduced and (can be described as D, K2D, K3D ..., K (N-1) D, wherein 1>K2>K3>….>K (N-1)), then two neighboring display
The parallax in the inversion area between the cycle is certainly less than reverse (N-1) D so that in the multi views signal of synthesis, two neighboring aobvious
Show that the inverse parallax in the inversion area between the cycle reduces, so that the influence of inversion effect is reduced, and because of phase in multi views signal
The parallax of adjacent two viewpoints tapers off change, can meet multiple beholders different to third dimension susceptibility and watch simultaneously, so that
Improve stereo display effect.
Obviously, those skilled in the art can carry out the essence of various changes and modification without departing from the present invention to the present invention
God and scope.So, if these modifications and modification of the present invention belong to the scope of the claims in the present invention and its equivalent technologies
Within, then the present invention is also intended to comprising including these changes and modification.
Claims (2)
1. a kind of image-signal processing method, it is characterised in that including：
Obtain the depth information of picture signal and described image signal；
It is N number of sub- view signal with different depth informations by described image signal transacting, wherein, believed by changing depth
The gray value that each in gray-scale map is put is ceased, the parallax between making per two neighboring sub- view signal is gradually reduced, and N is more than 1；
N number of sub- view signal is treated as multi views signal.
2. the method as described in claim 1, it is characterised in that described image signal transacting is had into different depth to be N number of
The sub- view signal of information, including：
Ratio is zoomed in and out to the gray value of each pixel of the depth information of described image signal at different zoom respectively,
Obtain each sub- view signal；
Or,
Distinguish gray value of the ratio to each pixel in the regional area of the depth information of described image signal at different zoom
Zoom in and out, obtain each sub- view signal.
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| CN102308590B (en) * | 2009-02-05 | 2014-04-16 | 富士胶片株式会社 | Three-dimensional image output device and three-dimensional image output method |
| EP2393298A1 (en) * | 2010-06-03 | 2011-12-07 | Zoltan Korcsok | Method and apparatus for generating multiple image views for a multiview autostereoscopic display device |
| CN102300112A (en) * | 2010-06-24 | 2011-12-28 | 索尼公司 | Display device and control method of display device |
| CN103167305A (en) * | 2013-03-21 | 2013-06-19 | 青岛海信电器股份有限公司 | Signal processing method and device |
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| CN105578171A (en) | 2016-05-11 |
| CN103945204A (en) | 2014-07-23 |
| CN103945204B (en) | 2016-03-23 |
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