Computer graphics processing and selective visual display system – Plural physical display element control system – Display elements arranged in matrix
Reexamination Certificate
1999-04-21
2001-07-10
Shalwala, Bipin (Department: 2673)
Computer graphics processing and selective visual display system
Plural physical display element control system
Display elements arranged in matrix
C348S044000, C348S046000
Reexamination Certificate
active
06259426
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The invention relates to a video display method and a video display apparatus which can emphasize a stereoscopic feeling in a video signal.
2. Description of the Related Art
Among stereoscopic display systems, there is a stereoscopic display system using a right/left parallax information as a system having the highest possibility of realization. According to this system, two cameras are used upon photographing and a signal for the left eye and a signal for the right eye are obtained. Upon reception, the right-eye signal and left-eye signal are reproduced so as to be displayed to each eye.
FIG. 1
shows a principle of the stereoscopic observing operation using the binocular (right/left) parallax. Images obtained by shifting a left-eye video image
3
L and a right-eye video image
3
R in the horizontal direction are displayed on a display surface
1
. Usually, a focal point of both of left and right eyes (
2
L,
2
R) (it is an intersecting point where the right and left sight lines cross and is called a point where vergence is matched) and a focal point of each eye (
2
L,
2
R) (it is a point where an adjustment of the single eye is matched) are the same location. Specifically speaking, a CRT surface in case of a CRT or the like is a location where the vergence and the adjustment are matched. A screen in case of a projector or the like is a location where the vergence and the adjustment are matched.
FIG. 1A
shows a case of a cross vergence. In this case, the video image
3
R shifted to the left is displayed to the right eye
2
R and the video image
3
L shifted to the right is displayed to the left eye
2
L. At this time, an image is fused in the head as if an object existed at the position where the vergences of the right and left eyes are matched. A virtual image
4
A is seen as if it was projected toward this side from the display surface
1
.
FIG. 1B
shows a case of a parallel vergence (non-cross vergence). In this case, the video image
3
L shifted to the left is displayed to the left eye
2
L and the video image
3
R shifted to the right is displayed to the right eye
2
R. In the parallel vergence, a virtual image
4
B is fused behind the display surface
1
.
A process to obtain a stereoscopic feeling by using such a principle of the binocular parallax even in an ordinary 2-dimensional image is an emphasis of a stereoscopic feeling using an effect of a Pulfrich.
The Pulfrich's effect (or Pulfrich's law) is a principle such that “when an object which reciprocates to the right and left in a vertical plane in front of the eyes is observed by the both eyes while a filter (ND filter) to reduce the light is attached to one of the eyes, the object is seen as if it moved while drawing an elliptic locus with a depth in a manner such that the object is located in front of and behind the inside of the vertical plane”. For example, as shown in
FIG. 2
, if a pendulum which reciprocates to the right and left in a plane
6
is seen in a state where an ND filter
5
is attached to the left eye
2
L, the pendulum is observed in a manner such that when the pendulum moves from the right to the left, the pendulum passes in front of the plane
6
and, when the pendulum moves from the left to the right, the pendulum passes behind the plane
6
and the locus of the pendulum forms an elliptic orbit
7
.
Such a Pulfrich's effect occurs because, when signals from the eyes is transmitted to the cerebrum, a time that is required until the signal is transmitted from the left eye
2
L to which the light was weakened to the cerebrum has a time delay as compared with that from the right eye
2
R to which the light is not weakened. That is, in the example of
FIG. 2
, when the pendulum moves from the right to the left and exists at a position of q, the signal from the left eye
2
L is delayed, so that the left eye
2
L recognizes the pendulum as if it existed at a position of p at this moment. A binocular parallax occurs as mentioned above and the viewer feels as if the pendulum existed at a position of N due to the cross vergence shown in
FIG. 1A
mentioned above. On the contrary, when the pendulum moves from the left to the right and exists at the position of q, the left eye
2
L recognizes the pendulum as if it existed at a position of r. Due to the binocular parallax, the viewer feels as if the pendulum existed at a position of F due to the parallel vergence shown in FIG.
1
B.
As mentioned above, there is the method using the Pulfrich's effect as a method of emphasizing the stereoscopic feeling of an ordinary 2-dimensional video image.
The Pulfrich's effect, however, has drawbacks such that only a moving object can be stereoscopically seen and the stereoscopic feeling is influenced by a moving speed and a moving direction, namely, a depth feeling changes depending on the moving speed and there is a problem such that the front side and the rear side are unconditionally determined by the moving direction.
That is, there is a problem such that the Pulfrich's effect does not function for a still image although a stereoscopic feeling (depth feeling) of only an object which moves in a specific direction is merely enhanced.
OBJECTS AND SUMMARY OF THE INVENTION
It is, therefore, an object of the invention to provide a video display method and a video display apparatus in a stereoscopic display system using a binocular (right/left) parallax effect, in which a stereoscopic feeling (front/rear feeling) can be emphasized in an ordinary 2-dimensional video signal besides a 3-dimensional video signal.
According to the invention disclosed in claim
1
, there is provided a video display apparatus for receiving a video signal and displaying a video image by a display apparatus, comprising: front/rear feeling emphasizing means for moving a position of an image in a horizontal scanning line in the horizontal direction in accordance with an amplitude level and a frequency level of a change in video signal by using edge information or focusing information of the video signal and adding a binocular parallax (right/left eye non-corresponding area); depth feeling emphasizing means for setting a center fusion image plane to a position behind a display surface by a parallel vergence; glossy feeling emphasizing means for detecting a glossy portion of the image and emphasizing a contrast of one eye and/or both eyes in the glossy portion; coring sharpness means for giving a sharpness to only an edge having a large amplitude and a high frequency component; vertical aperture control means for raising frequency characteristics of a middle low band or higher at a change point in the vertical direction of the image; and color emphasizing means for detecting a skin color as a memory color and emphasizing a color contrast of colors other than the skin color, wherein a stereoscopic feeling is emphasized by using two or more of the above means.
According to the invention disclosed in claim
9
, there is provided a video display method of receiving a video signal and displaying a video image by a display apparatus, comprising: a front/rear feeling emphasizing step of moving a position of an image in a horizontal scanning line in the horizontal direction in accordance with an amplitude level and a frequency level of a change in video signal by using edge information or focusing information of the video signal and adding a binocular parallax (right/left eye non-corresponding area); a depth feeling emphasizing step of setting a center fusion image plane to a position behind a display surface by a parallel vergence; a glossy feeling emphasizing step of detecting a glossy portion of the image and emphasizing a contrast of one eye and/or both eyes in the glossy portion; a coring sharpness step of giving a sharpness to only an edge having a large amplitude and a high frequency component; a vertical aperture control step of raising frequency characteristics of a middle low band or higher at a change point in the vertical direction of the image; and a color e
Fujihara Kazuhiko
Harada Shigeru
Kagita Junji
Osawa Yoshihito
Frommer William S.
Frommer Lawrence & Haug LLP.
Patel Nitin
Shalwala Bipin
Sony Corporation
LandOfFree
Video image display apparatus and method does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Video image display apparatus and method, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Video image display apparatus and method will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2466429