Abstract: A light projection device capable of irradiating light only onto an object includes: a light projector in which an object and a back surface of the object are taken as a projectable range; a shadow region detector that detects a shadow that occurs on the back surface of the object by projection light; and a controller that corrects a shadow region so that a projection region of the light projector and the shadow region can coincide with each other on the back surface of the object, sets the corrected shadow region as a light projection range and sets, as a non-light projection range, a region other than the shadow region, and sets projection light projected onto the set light projection range, wherein the light projector projects the projection light onto a range where the object is present by projecting the set projection light onto the set light projection range.

Abstract: Provided is a light projection device capable of irradiating light only onto an object (11). The light projection device includes: a light projector (1) in which an object (11) and a back surface of the object (11) are taken as a projectable range; a shadow region detector (2) that detects a shadow that occurs on the back surface of the object (11) by projection light (L1); and a controller (3) that corrects a shadow region (13) so that a projection region of the light projector (1) and the shadow region (13) can coincide with each other on the back surface of the object (11), sets the corrected shadow region 913) as a light projection range and sets, as a non-light projection range, a region other than the shadow region (13), and sets projection light (L1) projected onto the set light projection range, wherein the light projector (1) projects the projection light (L1) onto a range where the object (11) is present by projecting the set projection light onto the set light projection range.

Abstract: An image display apparatus includes a projector receiving an image signal and projecting image light and a screen including a projection plane of arbitrary shape. The projector and screen are connected with link mechanisms and link mechanisms. The relative position and posture between the projector and the screen are automatically or manually changeable. The relative position and posture between the projector and the screen are measured, and correction parameters for correcting distortion of image light projected from the projector onto the screen are calculated from the previously set viewing position of the viewer and the shape of the projection plane of the projector. Based on the calculated correction parameters, the image signal inputted into the projector is subjected to distortion correction processing. It is therefore possible to allow the viewer to see a clear image even if the position of the screen is changed.

Abstract: A virtual reality creating system including: a screen 1 including a projection plane of arbitrary shape; a distortion correction unit 3 which performs distortion correction for projecting image light onto the projection plane of arbitrary shape for a two-dimensional image signal to project image light onto a two-dimensional projection plane and then outputs the same; a parameter adjusting PC 5 which creates a distortion correction table as a correspondence map between the two-dimensional projection plane and a mesh model of the projection plane of arbitrary shape; and projectors 2a and 2b unit which project an image based on the image signal outputted from the image signal processing apparatus onto the screen.

Abstract: An image display device of the present invention comprises projectors, a reflecting mirror, a screen, an image signal processor which performs a distortion correction, and a base for supporting the projectors, the reflecting mirror, and the screen. The projectors, reflecting mirror, and screen are assembled in one to constitute a single moving unit, and the image display device further comprises a lifting device capable of moving the moving unit in a vertical direction with respect to the base.

Abstract: An endoscope system or an endoscopic operation training system includes: projectors which project video light indicating a video taken by an endoscope device that allows at least a part thereof to be inserted into patient's body cavity; and a dome type screen having a shape of a projection surface that directs a concave surface toward an operator and assistants, in which the video light is projected onto the projection surface.

Abstract: An image display apparatus includes a projector 2 receiving an image signal and projecting image light and a screen 1 including a projection plane of arbitrary shape. The projector 2 and screen 1 are connected with link mechanisms 3a to 3c and link mechanisms 3b and 3d. The relative position and posture between the projector 2 and the screen 1 are automatically or manually changeable. The relative position and posture between the projector 2 and the screen 1 are measured, and correction parameters for correcting distortion of image light projected from the projector 2 onto the screen 1 are calculated from the previously set viewing position of the viewer and the shape of the projection plane of the projector 2. Based on the calculated correction parameters, the image signal inputted into the projector 2 is subjected to distortion correction processing. It is therefore possible to allow the viewer to see a clear image even if the position of the screen is changed.

Abstract: An image display device of the present invention comprises projectors 20 and 21, a reflecting mirror 4, a screen 5, an image signal processor 1 which performs a distortion correction, and a base 6 for supporting the projectors 20 and 21, the reflecting mirror 4, and the screen 5. The projectors 20, 21, the reflecting mirror 4, and the screen 5 are assembled in one to constitute a single moving unit 7, and the image display device further comprises a lifting device 8 capable of moving the moving unit 7 in a vertical direction with respect to the base 6.

Abstract: A virtual reality creating system including: a screen 1 including a projection plane of arbitrary shape; a distortion correction unit 3 which performs distortion correction for projecting image light onto the projection plane of arbitrary shape for a two-dimensional image signal to project image light onto a two-dimensional projection plane and then outputs the same; a parameter adjusting PC 5 which creates a distortion correction table as a correspondence map between the two-dimensional projection plane and a mesh model of the projection plane of arbitrary shape; and projectors 2a and 2b unit which project an image based on the image signal outputted from the image signal processing apparatus onto the screen.