Video display method and video display apparatus

• US 6,201,566 B1
• Filed: 03/19/1998
• Issued: 03/13/2001
• Est. Priority Date: 03/28/1997
• Status: Expired due to Term

• Current Assignee: Sony Corporation (Sony Group Corp.)
• Original Assignee: Sony Corporation (Sony Group Corp.)
• Inventors: Fujihara, Kazuhiko, Ohsawa, Yoshihito, Harada, Shigeru, Kagita, Junji
• Primary Examiner(s): Le, Vu
• Application Number:
  US09/045,414
• Time in Patent Office: 1,090 Days
• Field of Search: 348/42-44, 348/48, 348/51-53, 348/55-56, 345/6-7, 345/114, 359/462, 359/466-467, 396/324, 396/325-327
• US Class Current: 348/51
• CPC Class Codes: G02B 30/25 using polarisation techniques
• CPC Class Codes: H04N 13/122 Improving the 3D impression of stereoscopic images by modifying image signal contents, e.g. by filtering or adding monoscopic depth cues H04N13/128 takes precedence
• CPC Class Codes: H04N 13/139 Format conversion, e.g. of frame-rate or size
• CPC Class Codes: H04N 13/15 for colour aspects of image signals
• CPC Class Codes: H04N 13/161 Encoding, multiplexing or demultiplexing different image signal components for multi-view video sequence encoding H04N19/597
• CPC Class Codes: H04N 13/167 Synchronising or controlling image signals
• CPC Class Codes: H04N 13/189 Recording image signals; Reproducing recorded image signals
• CPC Class Codes: H04N 13/194 Transmission of image signals
• CPC Class Codes: H04N 13/239 using two 2D image sensors having a relative position equal to or related to the interocular distance H04N13/243 takes precedence
• CPC Class Codes: H04N 13/257 Colour aspects
• CPC Class Codes: H04N 13/261 with monoscopic-to-stereoscopic image conversion
• CPC Class Codes: H04N 13/296 Synchronisation thereof; Control thereof
• CPC Class Codes: H04N 13/324 Colour aspects
• CPC Class Codes: H04N 13/334 using spectral multiplexing
• CPC Class Codes: H04N 13/337 using polarisation multiplexing
• CPC Class Codes: H04N 13/341 using temporal multiplexing
• CPC Class Codes: H04N 13/344 with head-mounted left-right displays
• CPC Class Codes: H04N 13/363 using image projection screens volumetric display H04N13/388
• CPC Class Codes: H04N 13/398 Synchronisation thereof; Control thereof
• CPC Class Codes: H04N 19/597 specially adapted for multi-view video sequence encoding
• CPC Class Codes: H04N 2013/0081 : Depth or disparity estimation from stereoscopic image signals

Abstract

When a 2-dimensional video image is displayed, a front/rear feeling and a stereoscopic feeling are enabled to be expressed. A detection signal Sd is formed by a high pass filter 25 and a rectifying circuit 26 in accordance with an amount of edge information. The detection signal Sd is supplied to a variable delay circuit 14L. A detection signal Sd′ is supplied to a variable delay circuit 14R. The variable delay circuits 14L and 14R are controlled in accordance with the edge information amount so that a video image for the left eye and a video image for the right eye are moved in the opposite directions. Thus, an imaginary image is synthesized to the front or rear side from a display plane. The left and right video images are displayed on CRTs 20L and 20R. The projection light passes through a horizontal polarizing filter 21L and a vertical polarizing filter 21R and the left and right video images are overlapped on a screen 22. The left and right video images are separately observed by glasses 23 having polarizing filters 24L and 24R and a stereoscopic feeling is enhanced.

Claims

1. A video display method of receiving an input video signal and forming a video signal which is displayed on a display apparatus, comprising the steps of:

detecting edge information of said input video signal by determining a maximum value among three primary color signals of said input video signal; and

detecting a front/rear relation of an object in a video image of said input video signal on the basis of said detected edge information.

2. A video display method according to claim 1, further comprising the steps of:

controlling a position of the image so as to be moved in the horizontal direction on the basis of said detected front/rear relation; and

displaying a video image having a right/left parallax formed as a result of said control.

3. A video display method according to claim 1, further comprising the steps of:

modulating depth information as stereoscopic information on the basis of said detected front/rear relation; and

displaying a video image having said modulated depth information.

4. A video display method according to claim 1, wherein said edge information is an inclination and an amplitude of an edge in said input video signal.

5. A video display method according to claim 1, wherein said edge information is detected by determining the maximum value among high frequency components of the three primary color signals of said input video signal.

6. A video display method according to claim 5, wherein said edge information is detected by determining the maximum value among rectified high frequency components of the three primary color signals.

7. A video display method according to claim 1, wherein said edge information is detected from a luminance signal in a color video signal.

8. A video display apparatus for receiving a video signal and forming a video signal which is displayed on a display apparatus, wherein edge information of said input video signal is detected by determining a maximum value among three primary color signals of said input video signal and a front/rear relation of an object in a video image is detected on the basis of said detected edge information.

9. An apparatus according to claim 8, wherein said video display apparatus is a projection type display using two cathode ray tubes (CRTs) for projectors.

10. An apparatus according to claim 8, wherein said video display apparatus is one cathode ray tube (CRT) in which a field double speed process has been performed to the input video signal.

11. An apparatus according to claim 8, wherein said video display apparatus is a liquid crystal display apparatus of a glasses type.

12. A video display apparatus for receiving a video signal and displaying a video signal on a display apparatus, comprising:

detecting means for detecting edge information of said input video signal by determining a maximum value among three primary color signals of said input video signal and detecting a front/rear relation of an object in a video image on the basis of said detected edge information; and

means for controlling a position of the image so as to be moved in the horizontal direction on the basis of said detected front/rear relation,

wherein a video image having a right/left parallax formed as a result of said control is displayed.

13. An apparatus according to claim 12, wherein said video display apparatus is a projection type display using two cathode ray tubes (CRTs) for projectors.

14. An apparatus according to claim 12, wherein said video display apparatus is one cathode ray tube (CRT) in which a field double speed process has been performed to the input video signal.

15. An apparatus according to claim 12, wherein said video display apparatus is a liquid crystal display apparatus of a glasses type.

16. A video display apparatus for receiving a video signal and displaying a video signal on a display apparatus, comprising:

means for detecting edge information of said input video signal by determining a maximum value among three primary color signals of said input video signal; and

means for modulating depth information as stereoscopic information in accordance with said detected edge information,

wherein a video image having said modulated depth information is displayed.

17. An apparatus according to claim 16, wherein said video display apparatus is a projection type display using two cathode ray tubes (CRTs) for projectors.

18. An apparatus according to claim 16, wherein said video display apparatus is one cathode ray tube (CRT) in which a field double speed process has been performed to the input video signal.

19. An apparatus according to claim 16, wherein said video display apparatus is a liquid crystal display apparatus of a glasses type.