Image display apparatus, image display method, and program product therefor
View Patent ↗There is provided an image display apparatus including a display portion that displays a first image in a given display region, a projection portion that projects to superimpose a second image on the first image displayed with the display portion in the display region, an image recording portion that records the display region, and a controller that controls at least one of displaying the first image with the display portion and projecting the second image with the projection portion, on the basis of a third image of the display region obtained with the image recording portion.
1. An image display apparatus comprising:
a screen on which images are projected;
a first projector arranged on front surface side of the screen that is configured such that a projection range thereof corresponds to a display region of the screen, and projects a first image to the display region from the front surface side of the screen;
a second projector arranged on the rear surface side of the screen that is configured such that a projection range thereof corresponds to the display region of the screen, and projects a second image which is a reverse of the first image with the display region of the screen from the rear side of the screen;
an image recording portion that records the display region;
a first detecting portion that compares respective pixels in identical positions of the image of the display region obtained by the image recording portion and the second image to be displayed by the second projector, and detects a portion of the display region corresponding to an image composed of pixels having a difference of the compared pixel values that exceeds a predetermined value as a shielding region; and
a controller that transmits the first image and position information to the first projector to project the first image to the display region of the screen when the shielding region is detected by the detecting portion, the position information being able to uniquely identify a projection position in the display region of the screen;
wherein the first image projected from the front surface side of the screen and second image projected from the rear surface side of the screen are the same within a portion of the display region where both the first image and the second image are displayed.
2. The image display apparatus according to claim 1 comprising:
a light source that irradiates an infrared light to the display region; and
a second detecting portion that is arranged at a side of the display region, opposite to light source, and detects a transmission state of the infrared light in the display region,
wherein the second detecting portion detects the shielding region on the basis of the transmission state of the infrared light in the display region detected by the second detecting portion.
3. The image display apparatus according to claim 2 , wherein the second detecting portion is a camera sensitive to an infrared region, and detects the infrared light in the display region with the use of the third image obtained by recording the display region.
4. The image display apparatus according to claim 1 , further comprising a first reflecting portion that is arranged in a projection direction of the second image by the second projector and that reflects the second image projected by the projection portion to project onto the display region.
5. The image display apparatus according to claim 1 ,
further comprising a second reflecting portion that is arranged in a projection direction of the first image by the first projector and that reflects the first image projected by the first projector to project onto the display region.
6. The image display apparatus according to claim 1 , wherein the first projector projects onto the display region, the first image corresponding to image information sent from a computer connected with the image display apparatus through a network.
7. The image display apparatus according to claim 1 , wherein the second projector projects onto the display region, the second image corresponding to image information sent from a computer connected with the image display apparatus through a network.
8. An image display method comprising:
projecting a first image with a display region of a screen from the front surface side of the screen using a first projector which is arranged on front surface side of the screen and is configured such that a projection range thereof corresponds to the display region of the screen;
projecting a second image which is a reverse of the first image with the display region of the screen from the rear surface side of the screen using a second projector which is arranged on rear surface side of the screen and is configured such that a projection range thereof corresponds to the display region of the screen;
recording the display region;
comparing respective pixels in identical positions of the image of the display region obtained by the image recording portion and the second image to be displayed by the second projector;
detecting a portion of the display region corresponding to an image composed of pixels having a difference of the compared pixel values that exceeds a predetermined value as a shielding region; and
transmitting the first image and position information to the first projector to project the first image to the display region of the screen when the shielding region is detected by the detecting portion, the position information being able to uniquely identify a projection position in the display region of the screen,
wherein the first image projected from the front surface side of the screen and second image projected from the rear surface side of the screen are the same within a portion of the display region where both the first image and the second image are displayed.
9. A computer readable medium storing a program causing a computer to execute a process for image display, the process comprising:
projecting a first image with a display region of a screen from the front surface side of the screen using a first projector which is arranged on front surface side of the screen and is configured such that a projection range thereof corresponds to the display region of the screen;
projecting a second image which is a reverse of the first image with the display region of the screen from the rear surface side of the screen using a second projector which is arranged on rear surface side of the screen and is configured such that a projection range thereof corresponds to the display region of the screen;
recording the display region;
comparing respective pixels in identical positions of the image of the display region obtained by the image recording portion and the second image to be displayed by the second projector;
detecting a portion of the display region corresponding to an image composed of pixels having a difference of the compared pixel values that exceeds a predetermined value as a shielding region; and
transmitting the first image and position information to the first projector to project the first image of the display region of the screen when the shielding region is detected by the detecting portion, the position information being able to uniquely identify a projection position in the display region of the screen,
wherein the first image projected from the front surface side of the screen and second image projected from the rear surface side of the screen are the same within a portion of the display region where both the first image and the second image are displayed.