JPH04253281A - Three-dimensional graphic display device - Google Patents

Abstract

PURPOSE:To observe a three-dimensional graphic at various angles even without using any special three-dimensional graphic operating means such as a mouse or the like and to reduce the burden of user operations. CONSTITUTION:This device is composed of a camera 101 to photograph the figure of a user, a figure position detecting means 102 to detect the position of the figure of the user from a picture obtained by this camera 101 and to judge the position of the view point of the user, three-dimensional model storing means 103 to store the coordinate values of respective points on the three- dimensional graphic, model display calculating means 104 to calculate the three- dimensional graphic to be displayed from the above-mentioned view point and the coordinate values of the respective points on the three-dimensional graphic, and output means 105 to output the three-dimensional graphic to be displayed.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for displaying three-dimensional figures on a display screen.

0002

[Prior Art] When displaying a three-dimensional figure on a display screen, unless the user performs operations such as rotation,
The three-dimensional figure can only be viewed from one direction. Therefore, in conventional three-dimensional graphic display devices, input devices such as a keyboard, mouse, trackball, joystick, etc. have been used as a means for the user to rotate the graphic, that is, as a three-dimensional graphic manipulation means. The configuration of such a device is shown in FIG. 4, and the appearance is shown in FIG. Regarding input devices in conventional three-dimensional graphic display devices, for example, Nikkan Kogyo Shimbun's "Practical Computer Graphics" 1
It is stated in chapters etc.

0003

However, when viewing three-dimensional figures using such a device, special input devices such as a keyboard, mouse, trackball, joystick, etc. must be used. Since these devices are computer input devices, people who are not familiar with their operation methods cannot view three-dimensional figures from various angles. As described above, the conventional three-dimensional graphic display device has a problem that should be improved regarding the ease of inputting the angle at which a three-dimensional graphic is viewed.

An object of the present invention is to provide a means for viewing a three-dimensional figure displayed on a display screen from various angles even by a person who has no knowledge of computer input equipment.

[0005]

[Means for Solving the Problems] The present invention is a three-dimensional figure display device that displays a three-dimensional figure on a display screen based on the position of the face of a user viewing the display screen, wherein the user's face is photographed. a camera for detecting the user's face, a face position detecting means for detecting the position of the user's face based on an image taken by the camera, and a device for storing the three-dimensional figure model;
dimensional model storage means, and model display calculation means for calculating a display of a three-dimensional figure to be displayed from the face position detected by the face position detection means and the three-dimensional figure model stored in the three-dimensional model storage means. and an output means for displaying the three-dimensional figure output from the model display calculation means.

[0006]

[Operation] When a user stands in front of the device, the three-dimensional graphic display device of the present invention determines the position of the user's face and displays a three-dimensional graphic on the display screen as if viewed from the position of the user's face. FIG. 3 shows an example of displaying a cube on a display using this device. When the user is looking from the left side of the display as shown in (a) of the same figure, the shape of the cube viewed from the left side is displayed, and when the user is looking from the right side of the display as shown in (b) of the same figure, the figure is displayed. Sometimes, the shape of a cube viewed from the right side is displayed.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a block diagram showing one embodiment of the present invention. This three-dimensional graphic display device includes a camera 101,
Face position detection means 102 and three-dimensional model storage means 103
, model display calculation means 104 , and output means 105 .

[0008] As the camera 101, a normal television camera or the like can be used. The face position detection means 102 is configured by combining a microprocessor, etc., and the method for detecting the face position from the image taken by the camera is as follows.
For example, it is described in 7-14 "Real-time Head Motion Recognition and Synthesis System" in the 4th Image Coding Symposium Material PCSJ89. The three-dimensional model storage means 103 stores the coordinate values of each point on a three-dimensional figure, and can use a semiconductor memory, a disk, or the like. The model display calculation means 104 is configured by combining a microprocessor, etc., and uses the position of the user's viewpoint determined by the face position detection means 102 and the three-dimensional figure stored in the three-dimensional model storage means 103. The display on the display screen is calculated based on the coordinate values of each point. Note that the position of the user's viewpoint can be determined based on the position of the face detected by the face position detection means 102, and may be set to the center of the face, for example. A method of calculating the display on a display screen from the coordinate values of each point on a three-dimensional figure and the user's viewpoint is described, for example, in Shokodo's ``Three-Dimensional Computer Graphics.'' A display or the like can be used as the output means 105. FIG. 2 is a front view showing the embodiment of FIG. 1. FIG. 2 shows an example in which a CRT display is used as the output means 105. The positional relationship between the camera and the display is arbitrary.

[0009]

[Effects of the Invention] As described above, by using the three-dimensional figure display device of the present invention, the user can view three-dimensional figures from various angles without using any special input device. The burden on the user in viewing three-dimensional figures is greatly reduced.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing one embodiment of a three-dimensional graphic display device.

FIG. 2 is a front view of the embodiment of FIG. 1;

FIG. 3 is a diagram showing a display example when a cube is displayed on a display using the apparatus of the present invention.

FIG. 4 is a block diagram showing the configuration of a conventional three-dimensional graphic display device.

FIG. 5 is a diagram showing the appearance of a conventional three-dimensional graphic display device.

[Explanation of symbols]

101 Camera 102 Face position detection means 103 3D model storage means 104 Model display calculation means 105 Output means

Claims (1)

[Claims] 1. A three-dimensional graphic display device that displays a three-dimensional graphic on a display screen based on the position of the face of a user viewing the display screen, the device comprising: a camera that photographs the user's face; and a camera that photographs the user's face; face position detection means for detecting the position of the user's face based on the video image;
a three-dimensional model storage means for storing a model of a dimensional figure;
a model display calculation means for calculating a three-dimensional figure to be displayed from the face position detected by the face position detection means and a three-dimensional figure model stored in the three-dimensional model storage means; A three-dimensional figure display device comprising: an output means for displaying the three-dimensional figure to be outputted.