CN103152591A - Image processor, image processing method, display apparatus and computer program - Google Patents

Abstract

The invention relates to an image processor, an image processing method, a display apparatus and a computer program. The image processor comprises an image signal analysis unit which analyzes whether the effect of parallax control on an image signal is difficult to obtain and a parallax control restrain unit which restrains parallax control relating to an image signal the parallax control effect of which is difficult to obtain.

Description

Image processing equipment, image processing method, display device and computer program

Technical field

Present technique relates to image processing equipment, image processing method, display device and the computer program of processing for carrying out 3-D view, relates to particularly for basis watching environment to carry out image processing equipment, image processing method, display device and the computer program of parallax control.

Background technology

Present three-dimensional 3 D visual image by left eye and right eye being shown the image with parallax, can providing to the beholder.For example, the combination of the shutter glasses worn by display device and image-watching person with a plurality of different images of time division way Alternation Display of time-division 3 D visual image display system and forming.In other words the mode that replaces with parallax under the extremely short cycle uses the frame sequence method, and display device is carried out the screen display of left-eye image and eye image.Simultaneously, the shutter glasses that the beholder wears is provided with the tripper that comprises the liquid crystal lens that is respectively used to left eye unit and right eye unit etc., and opens and closes operation and separate left-eye image and eye image by synchronously the left and right shutter alternately being carried out with the screens switch of display device side.And then left-eye image and eye image merge in beholder's brain and are three-dimensionally watched No. the 2003-45343rd, Japanese laid-open patent Shen Qing Publication (for example referring to).

As the transformat of 3-D view, used in the prior art (SBS) side by side method as shown in Figure 8.SBS is a kind of like this form, in described form, as shown in the figure, the active region (H of two dimensional image signal _Active) being divided in the horizontal direction two, left-eye image signal L and eye image signal R are compressed to 1/2 in the horizontal direction, are placed on respectively in the zone, left and right of division, and carry out and transmit.The 3-D view signal of SBS method for example even can be exported from the blu-ray player of the prior art of not supporting 3-D view.

The degree of depth of object in 3-D view is provided by the parallax between left-eye image and eye image.For for the object that is orientated in the position that there is no projection or depression between left-eye image and eye image parallax not, and when being present in as shown in Figure 9 in the same position on display screen in left-eye image and eye image when object, the beholder is the object on the perception screen as shown in figure 10.Form therewith contrast, if providing parallax to make as shown in figure 11 the object of left-eye image compare with the object of eye image to seem further keeps right, the beholder perceptive object is nearer than display screen as shown in figure 12.On the contrary, if providing parallax to make as shown in figure 13 the object of eye image compare with the object of left-eye image to seem further keeps right, the beholder perceptive object is more farther than display screen as shown in figure 14.

For example, propose about stereoscopic display device, wherein, based on to the image information of image correlation that can stereos copic viewing and with stereoscopic display device relevant display device information, by shifting left-eye image and eye image, the side-play amount that described stereoscopic display device is provided for showing, and adjust to show the stereoeffect No. the 2004-180069th, Japanese laid-open patent Shen Qing Publication (for example referring to) of image.

Such automatic parallax is controlled and is applicable to most of 3-D view contents, yet also has such content, can't obtain this effect for described content.In other words, have the wide situation of parallax, such as when left-eye image and eye image fully not simultaneously, and the pixel one of in only being exclusively used in left-eye image or eye image is when existing.

Wherein the specific examples of left-eye image and the diverse situation of eye image comprises: when the broadcast program that is received by television receiver switches to three-dimensional broadcasting from two dimension broadcasting, switch to three-dimensional display, even two dimension broadcasting is also underway.When even left-eye image and eye image are complete when difference also carrying out automatic parallax and controlling, this causes undesirable operation, and is the uncomfortable environment of watching for the user.

The specific examples of the situation that the pixel that one of wherein only is exclusively used in left-eye image or eye image in addition, exists comprises when showing two-dimensionally on the OSD(screen about 3-D view and showing) during screen.For example, when using the BD player do not support 3-D view to carry out OSD and show about SBS form 3-D view, osd screen one of only exists only in image.When the 3-D view that exists about the pixel that one of wherein only is exclusively used in left-eye image or eye image was by this way carried out automatic parallax and controlled, this caused undesirable operation, and is the uncomfortable environment of watching for the user.

For example, proposed a kind of parallax conversion equipment, this parallax conversion equipment: analyze disparity map, the disposable maintenance of described disparity map is for the parallax of the pixel of pixel groups or input picture; Generate the parallax control parameter, within making parallax in the input picture distribute to remain on preset range; And control first order picture conversion and second level picture conversion, described first order picture conversion shift in the horizontal direction input in picture left-eye image and the relative position of eye image, described second level picture conversion is carried out convergent-divergent and is processed after the picture conversion of the first order has been performed based on the parallax control parameter, described convergent-divergent is processed at the center based on left-eye image and eye image and carried out convergent-divergent No. the 2011-55022nd, Japanese laid-open patent Shen Qing Publication (for example referring to).Be understandable that, when parallax is provided for pixel, make the degree of depth surpass watching when limiting of nearside, perhaps surpass on the contrary watching when limiting of distally, stress level rises.Above-described parallax conversion equipment has been determined transfer amount and amount of zoom, makes the total amount of the stress level of whole screen be minimized.Yet no matter received image signal how, even left-eye image and eye image are transferred to lower stress level, this also can cause often carrying out parallax control, and causes in some cases the undesired uncomfortable operation of user.

Summary of the invention

Be desirable to provide a kind of fabulous image processing equipment, image processing method, display device and computer program, it can be according to the parallax control of watching fitness of environment ground execution 3-D view.

According to the embodiment of present technique, a kind of image processing equipment is provided, this image processing equipment comprises: picture signal is analyzed the unit, and whether its analysis is difficult to obtain parallax control to the effect of picture signal; And parallax control suppresses the unit, and it suppresses the parallax control relevant to the picture signal of the effect that wherein is difficult to obtain parallax control.

According to the embodiment of present technique, about the picture signal of the effect that wherein is difficult to obtain parallax control, parallax control suppresses the operation that the unit can stop parallax control, perhaps postpones the operation of parallax control.

According to the embodiment of present technique, picture signal is analyzed the unit and be may further include: parallax distribution computing unit, and the parallax that its each pixel for picture signal is calculated between left-eye image and eye image distributes; And parallax distributional analysis unit, it analyzes the picture signal that described parallax distributes and detects the effect that wherein is difficult to obtain parallax control.

According to the embodiment of present technique, parallax distributional analysis unit can obtain poor between maximum that parallax distributes and minimum value, and on duty when surpassing predetermined threshold, and the picture signal that wherein is difficult to obtain the effect of parallax control is detected.

According to the embodiment of present technique, parallax distributional analysis unit can the calculated stress curve and the integration total amount that distributes of parallax, and on duty when surpassing predetermined threshold, and the picture signal that wherein is difficult to obtain the effect of parallax control is detected.

Embodiment according to present technique, image processing equipment may further include: the transfer amount computing unit, it calculates transfer amount by the relative position that shifts in the horizontal direction left-eye image and eye image that distributes based on parallax, wherein, picture signal about the effect that wherein is difficult to obtain parallax control, the transfer amount that parallax control suppresses unit left-eye image and eye image is set to zero, perhaps transfer amount is maintained preceding value.

Another embodiment according to present technique provides a kind of image processing method, and the method comprises: analyze whether be difficult to obtain parallax control to the effect of picture signal; And suppress the parallax control relevant to the picture signal of the effect that wherein is difficult to obtain parallax control.

Another embodiment that also has according to present technique, a kind of display device is provided, this display device comprises: the parallax converting unit, and the parallax adjustment of its carries out image signal suppresses the parallax control relevant to the picture signal of the effect that wherein is difficult to obtain parallax control simultaneously; Image-display units; And indicative control unit, it carries out control, in order to make described image-display units show the picture signal of having been changed by described parallax converting unit parallax.

Another embodiment that also has according to present technique, a kind of computer program of describing with computer-readable format is provided, wherein, make computer play following effect: picture signal is analyzed the unit, and whether its analysis is difficult to obtain parallax control to the effect of picture signal; And parallax control suppresses the unit, and it suppresses the parallax control relevant to the picture signal of the effect that wherein is difficult to obtain parallax control.

Defined a kind of like this computer program according to the computer program of the embodiment of present technique, described computer program is described with computer-readable format, in order to realize on computers prior defined procedure.In other words, showed the cooperation operation by installing on computers according to the computer program of the embodiment of present technique, and can obtain and the operational effect similar according to the image processing equipment of the embodiment of present technique.

According to the embodiment of present technique, a kind of fabulous image processing equipment, image processing method, display device and computer program can be provided, it can be according to the parallax control of watching fitness of environment ground execution 3-D view.

Embodiment according to present technique, when the picture signal of the effect that wherein is difficult to obtain parallax control is detected, operation by stopping parallax control or postpone the operation of parallax control (amount of movement of left-eye image and eye image is set to zero, perhaps amount of movement is maintained preceding value), can avoid the environment of watching of for the user uncomfortable 3-D view.

Due to the detailed description that embodiment and accompanying drawing based on description after a while carry out, other purpose, characteristic and the advantage of present technique will become clear.

Description of drawings

Fig. 1 is the diagram that schematically illustrates according to the configuration of the three-dimensional image display systems of the embodiment of present technique;

Fig. 2 is the diagram of example of the internal configurations of diagram parallax converting unit;

Fig. 3 is the diagram of the histogrammic example of diagram parallax distribution;

Fig. 4 is the diagram of the stress curve of the relation between diagram expression parallax and stress level;

Fig. 5 is the diagram that illustrates the method for the transfer amount of calculating the parallax adjustment;

Fig. 6 A is the histogrammic diagram that the parallax of (extremely) picture signal of the illustration effect that wherein is difficult to obtain parallax control distributes;

Fig. 6 B is the histogrammic diagram that the parallax of (extremely) picture signal of the illustration effect that wherein is difficult to obtain parallax control distributes;

Fig. 7 A is the diagram that illustrates the calculated situation of histogrammic integration total amount that the parallax of stress curve and normal image signal wherein distributes;

Fig. 7 B is the diagram that illustrates the calculated situation of histogrammic integration total amount that the parallax of stress curve and abnormal image signal wherein distributes;

Fig. 8 is the diagram of the transformat of diagram SBS method 3-D view signal;

Fig. 9 is the diagram of the situation in the same position that illustrates on the screen that object wherein is present in left eye picture and right eye picture;

The diagram of Figure 10 lip-deep object of beholder's perception display floater that is diagram when object is present in same position on the screen of left eye picture and right eye picture;

Figure 11 is the object that illustrates left eye picture wherein than the seem diagram of the situation of further keeping right of the object of right eye picture;

Figure 12 is diagram when the object of left eye picture than the object of the right eye picture beholder's perceptive object diagram nearer than display floater when further keeping right that seem;

Figure 13 is the object that illustrates right eye picture wherein than the seem diagram of the situation of further keeping right of the object of left eye picture; And

Figure 14 is diagram when the object of right eye picture than the object of the left eye picture beholder's perceptive object diagram more farther than display floater when further keeping right that seem.

Embodiment

Hereinafter, describe the embodiment of present technique in detail with reference to accompanying drawing.

Fig. 1 schematically illustrates the configuration according to the three-dimensional image display systems 100 of the embodiment of present technique.Illustrated three-dimensional image display systems 100 comprises image input unit 110, parallax converting unit 120, indicative control unit 130 and image-display units 140.

110 inputs of image input unit are used for the picture signal of three-dimensional display.In picture signal, the eye image of the left-eye image of people's left eye institute perception and people's right eye institute perception is matched mutually, and for example inputs with SBS method transformat.

In parallax converting unit 120, the picture signal of image input unit 110 inputs is carried out the parallax conversion process, and carry out the adjustment by the parallax of eyes perception.Automatic parallax is controlled and is applicable to most of 3-D view contents, yet also has such content, can't obtain effect for described content.When carrying out unchangeably automatic parallax control, have following worry: this may cause undesirable operation and the uncomfortable environment of watching for the user.In current embodiment, configuration is such: when parallax converting unit 120 detected the picture signal of the effect that wherein is difficult to obtain parallax control, the operation of parallax control was stopped or postpones, and will at length provide its description after a while.

Indicative control unit 130 is carried out and is controlled, and makes from the picture signal of parallax converting unit 120 outputs to be presented on the image-display units 140 of one-level after a while.Image-display units 140 is picture signal to be shown as the three dimensional display of 3-D view, and for example can the application of frame sequence method, in described frame sequence method, alternately shows left-eye image and eye image with the extremely short cycle.The demonstration of indicative control unit 130 carries out image display units 140 is controlled, in order to support display packing.

Automatic parallax is controlled and is applicable to most of 3-D view contents, yet also has such content, can't obtain effect for described content.When carrying out unchangeably automatic parallax control, have following worry: this may cause undesirable operation and the uncomfortable environment of watching for the user.For example, have the situation of parallax wide (top description), such as when left-eye image and eye image fully not simultaneously, and the pixel one of in only being exclusively used in left-eye image or eye image is when existing.In current embodiment, configuration is such: when parallax converting unit 120 detected the picture signal of the effect that wherein is difficult to obtain parallax control, the operation of parallax control was stopped or postpones.

Fig. 2 illustrates the example of the internal configurations of parallax converting unit 120.Illustrated parallax converting unit 120 comprises parallax distribution computing unit 201, transfer amount computing unit 202, parallax distributional analysis unit 203, transfer amount determining unit 204 and transfer processing unit 205.

When the picture signal that is formed by left-eye image and eye image is transfused to, parallax distribution computing unit 201 is for the parallax between each pixel calculating left-eye image and eye image, and obtain the histogram that parallax distributes, the frequency that in other words namely occurs for each parallax pixel.Fig. 3 illustrates the histogrammic example that parallax distributes.

Transfer amount computing unit 202 distributes based on parallax and calculates transfer amount, to shift in the horizontal direction the relative position of left-eye image and eye image.The spirit of present technique is not limited to the specific calculation method of transfer amount.For example, can use the method for the calculating transfer amount that the total amount of disclosed wherein stress level in No. the 2011-55022nd, Japanese laid-open patent Shen Qing Publication is minimized.

Be understandable that, the stress that the people receives changes according to parallax.Fig. 4 illustrates the stress curve of the relation between expression parallax and stress level.Have comfort standard near the center that stress level is extremely low therein approx, yet, when parallax be provided for pixel make the degree of depth surpass nearside watch restriction or surpass on the contrary the distally watch restriction the time, stress level rises.The histogram (the pixel frequency of occurrences of each parallax) that stress curve (stress level of each parallax) and parallax distribute is integrated, and obtains its total amount.When carrying out the parallax adjustment, the histogram that parallax distributes shifts in the horizontal direction.Transfer amount computing unit 202 can obtain transfer amount as shown in Figure 5, makes total amount be minimized by following: when changing the transfer amount that parallax adjusts, and the total amount of the histogrammic integration that distributes of calculated stress curve and parallax continuously.

The histogram that the parallax that calculated by parallax distribution computing unit 201 distributes is analyzed in parallax distributional analysis unit 203, and detects the picture signal of the effect that wherein is difficult to obtain parallax control.Have a kind of like this picture signal, in described picture signal, when left-eye image and eye image fully not simultaneously, when the pixel one of in only being exclusively used in left-eye image or eye image exists, etc., be difficult to obtain the effect of parallax control, yet parallax is all wide under the whole circumstances.

Fig. 6 A and Fig. 6 B illustration wherein be difficult to obtain the histogram that the parallax of (extremely) picture signal of the effect of parallax control distributes.In the example shown in Fig. 6 A, pixel not only appears in the comfort standard of parallax distribution, but also has crossed over the parallax of wide region.In addition, in the example shown in Fig. 6 B, almost do not have pixel to appear in the comfort standard of parallax distribution, and many pixels appear near watching restriction of nearside and distally.

In arbitrary situation in Fig. 6 A and Fig. 6 B, the span that the maximum that parallax distributes and the difference between minimum value are far longer than comfort standard.Therefore, parallax distributional analysis unit 203 obtains poor between maximum that parallaxes distribute and minimum value, and when its value during over predetermined threshold, can detect the picture signal of the effect that wherein is difficult to obtain parallax control.

In addition, when parallax distributes when being present in zone outside comfort standard as shown in Fig. 6 A and Fig. 6 B, the amount esox increase of the integration of the histogram (the pixel frequency of occurrences Hist (d) of each parallax) that stress curve (the stress level Stress (d) of each parallax) and parallax distribute.When the total amount of the total amount of the stress curve of the normal image signal as shown in Fig. 7 A relatively and the histogrammic integration that parallax distributes and the stress curve of abnormal image signal as shown in Fig. 7 B and the histogrammic integration that parallax distributes, be appreciated that the latter's value is significantly larger.Therefore, the amount esox of the stress curve Stress (d) that parallax distributional analysis unit 203 calculating parallaxes distribute and the integration of histogram Hist (d), and when its value surpasses predetermined threshold, can detect the picture signal of the effect that wherein is difficult to obtain parallax control.

The transfer amount that transfer amount determining unit 204 input is calculated from transfer amount computing unit 202, the analysis result that in addition distributes from the parallax of parallax distributional analysis unit 203 with input.From parallax distributional analysis unit 203 when receiving indication and wherein can obtain the analysis result of normal image signal of effect of parallax control, transfer amount determining unit 204 will be outputed to unchangeably by the transfer amount that transfer amount computing unit 202 calculates transfer processing unit 205 when transfer amount determining unit 204.On the other hand, when transfer amount determining unit 204 from parallax distributional analysis unit 203 when receiving indication and wherein can't obtain the analysis result of abnormal image signal of effect of parallax control, transfer amount determining unit 204 transfer amount are set to zero and stop the operation of parallax control, perhaps transfer amount is maintained preceding value and suppress parallax control, in order to postpone the operation of parallax control.

According to the transfer amount from 204 outputs of transfer amount determining unit, the left-eye image of the picture signal that transfer processing unit 205 transfers are inputted in the horizontal direction and the relative position of eye image.

And then, when image-display units 140 is configured by liquid crystal display, exist owing to carrying out automatic parallax and control the worry of crosstalking and can more worsen.Therefore, preferably guarantee by following and do not carry out parallax control about character: by analysis or other mechanism of using parallax to distribute, detect whether comprise character in picture signal.

Foundation is according to the three-dimensional image display systems of the embodiment of present technique, when the picture signal of the effect that wherein is difficult to obtain parallax control is detected, operation by stopping parallax control or postpone the operation of parallax control (amount of movement of left-eye image and eye image is set to zero, perhaps amount of movement is maintained preceding value), can avoid the environment of watching of for the user uncomfortable 3-D view.

And then present technique can also be configured as described below.

(1) a kind of image processing equipment comprises: picture signal is analyzed the unit, and whether its analysis is difficult to obtain parallax control to the effect of picture signal; And parallax control suppresses the unit, and it suppresses the parallax control relevant to the picture signal of the effect that wherein is difficult to obtain parallax control.

(2) image processing equipment described according to (1), wherein, about the picture signal of the effect that wherein is difficult to obtain parallax control, described parallax control suppresses the operation that the unit stops parallax control, perhaps postpones the operation of parallax control.

(3) image processing equipment described according to (1), wherein, described picture signal is analyzed the unit and is further comprised: parallax distribution computing unit, the parallax that its each pixel for picture signal is calculated between left-eye image and eye image distributes; And parallax distributional analysis unit, it analyzes the picture signal that described parallax distributes and detects the effect that wherein is difficult to obtain parallax control.

(4) image processing equipment described according to (3), wherein, described parallax distributional analysis unit obtains poor between maximum that described parallax distributes and minimum value, and on duty when surpassing predetermined threshold, and the picture signal that wherein is difficult to obtain the effect of parallax control is detected.

(5) image processing equipment described according to (3), wherein, the total amount of the integration that described parallax distributional analysis unit calculated stress curve and parallax distribute, and on duty when surpassing predetermined threshold, the picture signal that wherein is difficult to obtain the effect of parallax control is detected.

(6) image processing equipment described according to (1), further comprise: the transfer amount computing unit, it calculates transfer amount by the relative position that shifts in the horizontal direction left-eye image and eye image that distributes based on parallax, wherein, picture signal about the effect that wherein is difficult to obtain parallax control, the transfer amount that described parallax control suppresses unit left-eye image and eye image is set to zero, perhaps transfer amount is maintained preceding value.

(7) a kind of image processing method comprises: analyze whether be difficult to obtain parallax control to the effect of picture signal; And suppress the parallax control relevant to the picture signal of the effect that wherein is difficult to obtain parallax control.

(8) a kind of display device comprises: the parallax converting unit, and the parallax adjustment of its carries out image signal suppresses the parallax control relevant to the picture signal of the effect that wherein is difficult to obtain parallax control simultaneously; Image-display units; And indicative control unit, it carries out control, in order to make described image-display units show the picture signal of having been changed by described parallax converting unit parallax.

(9) a kind of computer program of describing with computer-readable format, wherein, make computer play following effect: picture signal is analyzed the unit, and whether its analysis is difficult to obtain parallax control to the effect of picture signal; And parallax control suppresses the unit, and it suppresses the parallax control relevant to the picture signal of the effect that wherein is difficult to obtain parallax control.

Present technique comprises the theme with on the December 6th, 2011 of disclosed Topic relative in the Japanese priority patent application JP 2011-266407 of Japan Office application, and the whole content of this patent application is incorporated herein by reference.

One skilled in the art will appreciate that and depend on design needs and other factors, various modifications, combination, recombinant and change all may occur, within they all are in the scope of claims and equivalent connotation thereof.

Claims (12)

1. image processing equipment comprises:

Picture signal is analyzed the unit, and whether its analysis is difficult to obtain parallax control to the effect of picture signal; And

Parallax control suppresses the unit, and it suppresses the parallax control relevant to the picture signal of the effect that wherein is difficult to obtain parallax control.

2. image processing equipment according to claim 1, wherein, about the picture signal of the effect that wherein is difficult to obtain parallax control, described parallax control suppresses the operation that the unit stops parallax control, perhaps postpones the operation of parallax control.

3. image processing equipment according to claim 1, wherein, described picture signal is analyzed the unit and is further comprised:

Parallax distribution computing unit, the parallax that its each pixel for picture signal is calculated between left-eye image and eye image distributes; And

Parallax distributional analysis unit, it analyzes the picture signal that described parallax distributes and detects the effect that wherein is difficult to obtain parallax control.

4. image processing equipment according to claim 3, wherein, described parallax distributional analysis unit obtains poor between maximum that described parallax distributes and minimum value, and on duty when surpassing predetermined threshold, and the picture signal that wherein is difficult to obtain the effect of parallax control is detected.

5. image processing equipment according to claim 3, wherein, the total amount of the integration that described parallax distributional analysis unit calculated stress curve and parallax distribute, and on duty when surpassing predetermined threshold, the picture signal that wherein is difficult to obtain the effect of parallax control is detected.

6. image processing equipment according to claim 1 further comprises:

The transfer amount computing unit, it calculates transfer amount by the relative position that shifts in the horizontal direction left-eye image and eye image that distributes based on parallax,

Wherein, about the picture signal of the effect that wherein is difficult to obtain parallax control, the transfer amount that described parallax control suppresses unit left-eye image and eye image is set to zero, perhaps transfer amount is maintained preceding value.

7. image processing method comprises:

Analyze and whether be difficult to obtain parallax control to the effect of picture signal; And

Suppress the parallax control relevant to the picture signal of the effect that wherein is difficult to obtain parallax control.

8. display device comprises:

The parallax converting unit, the parallax adjustment of its carries out image signal suppresses the parallax control relevant to the picture signal of the effect that wherein is difficult to obtain parallax control simultaneously;

Image-display units; And

Indicative control unit, it carries out control, in order to make described image-display units show the picture signal of having been changed by described parallax converting unit parallax.

9. display device according to claim 8, wherein, described parallax converting unit further comprises:

Parallax distribution computing unit, the parallax that its each pixel for picture signal is calculated between left-eye image and eye image distributes; And

Parallax distributional analysis unit, it analyzes the picture signal that described parallax distributes and detects the effect that wherein is difficult to obtain parallax control.

10. display device according to claim 9, wherein, described parallax converting unit further comprises:

The transfer amount computing unit, it calculates transfer amount by the relative position that shifts in the horizontal direction left-eye image and eye image that distributes based on described parallax; And

The transfer amount determining unit, it is about the picture signal of the effect that wherein is difficult to obtain parallax control, and the transfer amount of left-eye image and eye image is set to zero, perhaps transfer amount is maintained preceding value.

11. display device according to claim 10, wherein, described parallax converting unit further comprises:

The transfer processing unit, it shifts the relative position of left-eye image and eye image according to the transfer amount from described transfer amount determining unit output.

12. a computer program of describing with computer-readable format wherein, makes computer play following effect:

Picture signal is analyzed the unit, and whether its analysis is difficult to obtain parallax control to the effect of picture signal; And

Parallax control suppresses the unit, and it suppresses the parallax control relevant to the picture signal of the effect that wherein is difficult to obtain parallax control.

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