IMAGE SIGNAL PROCESSING APPARATUS, IMAGE SIGNAL PROCESSING METHOD, AND IMAGE PROJECTION APPARATUS

• US 20100128107A1
• Filed: 11/24/2009
• Published: 05/27/2010
• Est. Priority Date: 11/25/2008
• Status: Active Grant

• Current Assignee: Sony Corporation (Sony Group Corp.)
• Original Assignee: Sony Corporation (Sony Group Corp.)
• Inventors: TOMITA, Hideo
• Granted Patent: US 8,411,134 B2
• Time in Patent Office: Days
• US Class Current: 348/43
• CPC Class Codes: G06T 3/08 Projecting images onto non-planar surfaces, e.g. geodetic screens
• CPC Class Codes: H04N 13/10 Processing, recording or transmission of stereoscopic or multi-view image signals
• CPC Class Codes: H04N 13/363 using image projection screens volumetric display H04N13/388

Abstract

An image signal processing apparatus including a first conversion processing unit performing conversion processing for a left-eye image signal used to display a left-eye image so as to adjust a horizontal and/or vertical size of the left-eye image and correct a vertical bow-like distortion of the left-eye image, a second conversion processing unit performing conversion processing for a right-eye image signal used to display a right-eye image so as to adjust a horizontal and/or vertical size of the right-eye image and correct a vertical bow-like distortion of the right-eye image, and a merging unit obtaining an output image signal by merging a left-eye image signal obtained by performing the conversion processing through the first conversion processing unit and a right-eye image signal obtained by performing the conversion processing through the second conversion processing unit is provided.

Claims

1. An image signal processing apparatus comprising:

a first conversion processing unit configured to perform conversion processing for a left-eye image signal used to display a left-eye image so as to adjust a horizontal and/or vertical size of the left-eye image and correct a vertical bow-like distortion of the left-eye image;

a second conversion processing unit configured to perform conversion processing for a right-eye image signal used to display a right-eye image so as to adjust a horizontal and/or vertical size of the right-eye image and correct a vertical bow-like distortion of the right-eye image; and

a merging unit configured to obtain an output image signal by merging a left-eye image signal obtained by performing the conversion processing through the first conversion processing unit and a right-eye image signal obtained by performing the conversion processing through the second conversion processing unit.

2. The image signal processing apparatus according to claim 1, wherein each of the first conversion processing unit and the second conversion processing unit includes:

a vertical conversion unit configured to perform conversion processing so as to correct the vertical bow-like distortion for an input image signal; and

a horizontal conversion unit configured to perform conversion processing so as to adjust the horizontal size for an image signal obtained through the vertical conversion unit.

3. The image signal processing apparatus according to claim 1, wherein each of the first conversion processing unit and the second conversion processing unit includes:

a vertical conversion unit configured to perform conversion processing so as to adjust the vertical size and correct the vertical bow-like distortion for an input image signal.

4. The image signal processing apparatus according to claim 1,

wherein the first conversion processing unit and the second conversion processing unit operate in synchronization with each other,

wherein when one of the first conversion processing unit and the second conversion processing unit performs conversion processing so as to increase a horizontal and/or vertical size of an image, the other of the first conversion processing unit and the second conversion processing unit performs conversion processing so as to decrease the horizontal and/or vertical size of the image, and

wherein when one of the first conversion processing unit and the second conversion processing unit performs conversion processing so as to correct one of an upwardly convex vertical bow-like distortion and a downwardly convex vertical bow-like distortion that occur in an image, the other of the first conversion processing unit and the second conversion processing unit performs conversion processing so as to correct the other of the upwardly convex vertical bow-like distortion and the downwardly convex vertical bow-like distortion that occur in the image.

5. The image signal processing apparatus according to claim 1,

wherein the first conversion processing unit further performs conversion processing so as to shift the left-eye image in a horizontal direction and a vertical direction;

and

wherein the second conversion processing unit further performs conversion processing so as to shift the right-eye image in a horizontal direction and a vertical direction.

6. The image signal processing apparatus according to claim 5, wherein each of the first conversion processing unit and the second conversion processing unit includes:

a vertical conversion unit configured to perform conversion processing so as to perform shifting in the vertical direction for an input image signal; and

a horizontal conversion unit configured to perform conversion processing so as to perform shifting in the horizontal direction for an image signal obtained through the vertical conversion unit.

7. The image signal processing apparatus according to claim 5,

wherein the first conversion processing unit and the second conversion processing unit operate in synchronization with each other,

wherein when one of the first conversion processing unit and the second conversion processing unit performs conversion processing so as to shift an image in one direction, the other of the first conversion processing unit and the second conversion processing unit performs conversion processing so as to shift the image in a direction which is a reverse of the one direction.

8. An image signal processing method comprising the steps of:

performing first conversion processing for a left-eye image signal used to display a left-eye image so as to adjust a horizontal and/or vertical size of the left-eye image and correct a vertical bow-like distortion of the left-eye image;

performing second conversion processing for a right-eye image signal used to display a right-eye image so as to adjust a horizontal and/or vertical size of the right-eye image and correct a vertical bow-like distortion of the right-eye image; and

obtaining an output image signal by merging a left-eye image signal obtained by performing the first conversion processing and a right-eye image signal obtained by performing the second conversion processing.

9. An image projection apparatus comprising:

an image display unit configured to align a left-eye image and a right-eye image in a vertical direction on a display panel for display; and

a projection optical system configured to project the left-eye image and the right-eye image that are displayed on the display panel onto a screen so that the left-eye image and the right-eye image are superimposed on each other,

wherein the image display unit includes

a first conversion processing unit configured to perform conversion processing for a left-eye image signal used to display the left-eye image so as to adjust a horizontal and/or vertical size of the left-eye image and correct a vertical bow-like distortion of the left-eye image,

a second conversion processing unit configured to perform conversion processing for a right-eye image signal used to display the right-eye image so as to adjust a horizontal and/or vertical size of the right-eye image and correct a vertical bow-like distortion of the right-eye image, and

a merging unit configured to obtain an output image signal by merging a left-eye image signal obtained by performing the conversion processing through the first conversion processing unit and a right-eye image signal obtained by performing the conversion processing through the second conversion processing unit.

10. The image projection apparatus according to claim 9, wherein the projection optical system includes:

a relay lens configured to form a real image of the left-eye image and a real image of the right-eye image that are separated from each other when a light beam reflected from the left-eye image displayed on the display panel and a light beam reflected from the right-eye image displayed on the display panel are made incident;

a light guide unit configured to separately guide the formed real image of the left-eye image and the formed real image of the right-eye image;

a first projection lens configured to project the guided real image of the left-eye image onto the screen; and

a second projection lens configured to project the guided real image of the right-eye image onto the screen.