Image processing apparatus, method and program, and display apparatus

• US 8,797,389 B2
• Filed: 02/22/2008
• Issued: 08/05/2014
• Est. Priority Date: 02/22/2007
• Status: Active Grant

• Current Assignee: NEC Corporation
• Original Assignee: NEC Corporation
• Inventors: Miyasaka, Daigo, Ishii, Junichirou, Imai, Masao, Okumura, Fujio
• Primary Examiner(s): HOLDER, ANNER N
• Application Number:
  US12/528,339
• Publication Number:
  US 20100013957A1
• Time in Patent Office: 2,356 Days
• Field of Search: 348/53, 348/54
• US Class Current: 348/53
• CPC Class Codes: G09G 2300/02 Composition of display devices
• CPC Class Codes: G09G 2358/00 Arrangements for display data security
• CPC Class Codes: G09G 3/001 using specific devices not provided for in groups G09G3/02 - G09G3/36, e.g. using an intermediate record carrier such as a film slide; Projection systems; Display of non-alphanumerical information, solely or in combination with alphanumerical information, e.g. digital display on projected diapositive as background slide projectors per se G03B23/00 = 42 HP
• CPC Class Codes: G09G 5/363 Graphics controllers
• CPC Class Codes: G09G 5/377 for mixing or overlaying two or more graphic patterns G09G5/02, G09G5/397 take precedence
• CPC Class Codes: H04N 13/341 using temporal multiplexing
• CPC Class Codes: H04N 2013/403 the images being monoscopic

Abstract

The invention provides: a code generation and data assignment circuit that sets the order in which a confidential image and a reversed image are displayed, based on an orthogonal code; and a shutter glass control signal generation circuit that controls so that during a period when an image signal of an image including at least part or all of the confidential image is outputted, the shutter glasses disposed between the succeeding display apparatus and the user'"'"'s eyes are set in a light transmission state and during a period when another image is displayed, the shutter glasses are set in a light shielding state. The image signal of the confidential image and the image signal of the reversed image are in a relationship such that when the brightness values of the images are added together for each pixel, the resultant image has no correlation with the first output image.

Claims

1. An image processing apparatus that sequentially outputs at least two image signals,

wherein an image signal of a first output image and an image signal of a second output image are in a relationship such that when brightness values of the images are added together for each pixel, a resultant image has no correlation with the first output image,

an order in which the first output image and the second output image are displayed on each period in a time frame having a predetermined number of periods is set based on a corresponding element in an orthogonal code assigned to each frame, the orthogonal code being one of a set of a plurality of codes each having a predetermined number of elements, said plurality of codes being orthogonal to each other, and

the image processing apparatus includes an optical shutter control unit that controls so that during a period when an image signal of an image including at least part or all of the first output image is outputted, a shutter disposed between a display apparatus displaying the image corresponding to the image signal and user'"'"'s eyes is set in a light transmission state and during a period when another image is displayed, the shutter is set in a light shielding state.

3. The image processing apparatus according to claim 1, wherein the image signal of the first output image is outputted when an element value of the orthogonal code is “

1”

, and the image signal of the second output image is outputted when the element value is “

−

1”

.

4. The image processing apparatus according to claim 1, wherein the image processing apparatus includes a unit that randomly changes the orthogonal code for each frame.

5. The image processing apparatus according to claim 1, wherein when the first element value of the orthogonal code used for a current frame and the last element value of the orthogonal code used for a preceding frame are the same value, the element value of the orthogonal code used for the current frame is reversed.

6. The image processing apparatus according to claim 1, wherein an image signal of a third output image is outputted together with the image signal of the second output image during the period when the shutter is set in the light shielding state.

2. An image processing apparatus that sequentially outputs at least two image signals,

wherein the image processing apparatus includes a reversed image generation unit that generates a second output image so that an image signal of a first output image and an image signal of the second output image are in a relationship such that when brightness values of the images are added together for each pixel, a resultant image has no correlation with the first output image,

an order in which the first output image and the second output image are displayed on each period in a time frame having a predetermined number of periods is set based on a corresponding element in an orthogonal code assigned to each frame, the orthogonal code being one of a set of a plurality of codes each having a predetermined number of elements, said plurality of codes being orthogonal to each other, and

the image processing apparatus includes an optical shutter control unit that controls so that during a period when an image signal of an image including at least part or all of the first output image is outputted, a shutter disposed between a display apparatus displaying the image corresponding to the image signal and user'"'"'s eyes is set in a light transmission state and during a period when another image is displayed, the shutter is set in a light shielding state.

16. The image processing apparatus according to claim 2, wherein the image signal of the first output image is outputted when an element value of the orthogonal code is “

1”

, and the image signal of the second output image is outputted when the element value is “

−

1”

.

17. The image processing apparatus according to claim 2, wherein the image processing apparatus includes a unit randomly changes the orthogonal code for each frame.

18. The image processing apparatus according to claim 2, wherein when the first element value of the orthogonal code used for a current frame and the last element value of the orthogonal code used for a preceding frame are the same value, the element value of the orthogonal code used for the current frame is reversed.

19. The image processing apparatus according to claim 2, wherein an image signal of a third output image is outputted together with the image signal of the second output image during the period when the shutter is set in the light shielding state.

7. An image processing method for sequentially outputting at least two image signals, comprising:

a step of setting an order in which a first output image and a second output image are displayed on each period in a time frame having a predetermined number of periods, based on a corresponding element in an orthogonal code assigned to each frame, the orthogonal code being one of a set of a plurality of codes each having a predetermined number of elements, said plurality of codes being orthogonal to each other; and

an optical shutter control step of controlling so that during a period when an image signal of an image including at least part or all of the first output image is outputted, a shutter disposed between a display apparatus displaying the image corresponding to the image signal and user'"'"'s eyes is set in a light transmission state and during a period when another image is displayed, the shutter is set in a light shielding state,

wherein an image signal of the first output image and an image signal of the second output image are in a relationship such that when brightness values of the images are added together for each pixel, a resultant image has no correlation with the first output image.

9. The image processing method according to claim 7, wherein the image signal of the first output image is outputted when an element value of the orthogonal code is “

1”

, and the image signal of the second output image is outputted when the element value is “

−

1”

.

10. The image processing method according to claim 7, wherein the image processing method includes a step of randomly changing the orthogonal code for each frame.

11. The image processing method according to claim 7, wherein when the first element value of the orthogonal code used for a current frame and the last element value of the orthogonal code used for a preceding frame are the same value, the element value of the orthogonal code used for the current frame is reversed.

12. The image processing method according to claim 7, wherein an image signal of a third output image is outputted together with the image signal of the second output image during the period when the shutter is set in the light shielding state.

13. A non-transitory computer-readable storage medium for storing an image processing program that causes a computer to execute the image processing method according to claim 7.

8. An image processing method for sequentially outputting at least two image signals, comprising:

a reversed image generation step of generating a second output image so that an image signal of a first output image and an image signal of the second output image are in a relationship such that when brightness values of the images are added together for each pixel, a resultant image has no correlation with the first output image;

a step of setting an order in which the first output image and the second output image are displayed on each period in a time e frame having a predetermined number of periods, based on a corresponding element in an orthogonal code assigned to each frame, the orthogonal code being one of a set of a plurality of codes each having a predetermined number of elements, said plurality of codes being orthogonal to each other; and

an optical shutter control step of controlling so that during a period when an image signal of an image including at least part or all of the first output image is outputted, a shutter disposed between a display apparatus displaying the image corresponding to the image signal and user'"'"'s eyes is set in a light transmission state and during a period when another image is displayed, the shutter is set in a light shielding state.

20. The image processing method according to claim 8, wherein the image signal of the first output image is outputted when an element value of the orthogonal code is “

1”

, and the image signal of the second output image is outputted when the element value is “

−

1”

.

21. The image processing method according to claim 8, wherein the image processing method includes a step of randomly changing the orthogonal code for each frame.

22. The image processing method according to claim 8, wherein when the first element value of the orthogonal code used for a current frame and the last element value of the orthogonal code used for a preceding frame are the same value, the element value of the orthogonal code used for the current frame is reversed.

23. The image processing method according to claim 8, wherein an image signal of a third output image is outputted together with the image signal of the second output image during the period when the shutter is set in the light shielding state.

24. A non-transitory computer-readable storing medium for storing an image processing program that causes a computer to execute the image processing method according to claim 8.

14. A display apparatus that sequentially displays images corresponding to at least two image signals, by a display unit,

wherein an image signal of a first output image and an image signal of a second output image are in a relationship such that when brightness values of the images are added together for each pixel, a resultant image has no correlation with the first output image,

an order in which the first output image and the second output image are displayed on each period in a time frame having a predetermined number of periods is set based on a corresponding element in an orthogonal code assigned to each frame, the orthogonal code being one of a set of a plurality of codes each having a predetermined number of elements, said plurality of codes being orthogonal to each other, and

the display apparatus includes an optical shutter control so that during a period when an image signal of an image including at least part or all of the first output image is outputted, a shutter disposed between the display unit and user'"'"'s eyes is set in a light transmission state and during a period when another image is displayed, the shutter is set in a light shielding state.

15. A display apparatus that sequentially displays images corresponding to at least two image signals, by a display unit,

wherein the display apparatus includes a reversed image generation unit that generates a second output image so that an image signal of a first output image and an image signal of the second output image are in a relationship such that when brightness values of the images are added together for each pixel, a resultant image has no correlation with the first output image,

an order in which the first output image and the second output image are displayed on each period in a time frame having a predetermined number of periods is set based on a corresponding element in an orthogonal code assigned to each frame, the orthogonal code being one of a set of a plurality of codes each having a predetermined number of elements, said plurality of codes being orthogonal to each other, and

the display apparatus includes an optical shutter control unit that controls so that during a period when an image signal of an image including at least part or all of the first output image is outputted, a shutter disposed between the display unit and user'"'"'s eyes is set in a light transmission state and during a period when another image is displayed, the shutter is set in a light shielding state.

25. An image processing apparatus that sequentially outputs at least two image signals,

wherein an image signal of a first output image and an image signal of a second output image are in a relationship such that when brightness values of the images are added together for each pixel, a resultant image has no correlation with the first output image,

an order in which the first output image and the second output image are displayed on each period in a time frame having a predetermined number of periods is set based on a corresponding element in an orthogonal code assigned to each frame, the orthogonal code being one of a set of a plurality of codes each having a predetermined number of elements, said plurality of codes being orthogonal to each other, and

the image processing apparatus includes optical shutter control means for controlling so that during a period when an image signal of an image including at least part or all of the first output image is outputted, a shutter disposed between a display apparatus displaying the image corresponding to the image signal and user'"'"'s eyes is set in a light transmission state and during a period when another image is displayed, the shutter is set in a light shielding state.

26. An image processing apparatus that sequentially outputs at least two image signals,

wherein the image processing apparatus includes reversed image generation means for generating a second output image so that an image signal of a first output image and an image signal of the second output image are in a relationship such that when brightness values of the images are added together for each pixel, a resultant image has no correlation with the first output image,

an order in which the first output image and the second output image are displayed on each period in a time frame having a predetermined number of periods is set based on a corresponding element in an orthogonal code assigned to each frame, the orthogonal code being one of a set of a plurality of codes each having a predetermined number of elements, said plurality of codes being orthogonal to each other, and

the image processing apparatus includes optical shutter control means for controlling so that during a period when an image signal of an image including at least part or all of the first output image is outputted, a shutter disposed between a display apparatus displaying the image corresponding to the image signal and user'"'"'s eyes is set in a light transmission state and during a period when another image is displayed, the shutter is set in a light shielding state.

27. A display apparatus that sequentially displays images corresponding to at least two image signals, by display means,

wherein an image signal of a first output image and an image signal of a second output image are in a relationship such that when brightness values of the images are added together for each pixel, a resultant image has no correlation with the first output image,

an order in which the first output image and the second output image are displayed on each period in a time frame having a predetermined number of periods is set based on a corresponding element in an orthogonal code assigned to each frame, the orthogonal code being one of a set of a plurality of codes each having a predetermined number of elements, said plurality of codes being orthogonal to each other, and

the display apparatus includes optical shutter control means for controlling so that during a period when an image signal of an image including at least part or all of the first output image is outputted, a shutter disposed between the display means and user'"'"'s eyes is set in a light transmission state and during a period when another image is displayed, the shutter is set in a light shielding state.

28. A display apparatus that sequentially displays images corresponding to at least two image signals, by display means,

wherein the display apparatus includes reversed image generation means for generating a second output image so that an image signal of a first output image and an image signal of the second output image are in a relationship such that when brightness values of the images are added together for each pixel, a resultant image has no correlation with the first output image,

an order in which the first output image and the second output image are displayed on each period in a time frame having a predetermined number of periods is set based on a corresponding element in an orthogonal code assigned to each frame, the orthogonal code being one of a set of a plurality of codes each having a predetermined number of elements, said plurality of codes being orthogonal to each other, and

the display apparatus includes optical shutter control means for controlling so that during a period when an image signal of an image including at least part or all of the first output image is outputted, a shutter disposed between the display means and user'"'"'s eyes is set in a light transmission state and during a period when another image is displayed, the shutter is set in a light shielding state.