JPH01120596A - Image display device - Google Patents

Abstract

PURPOSE: To automatically turn an object at the time of movement of a visual point to visually recognize the side face by detecting the visual point position and executing the coordinate transformation processing of fundamental picture data in accordance with the visual point position. CONSTITUTION: Data of a graphic to be displayed as a picture is separated into picture data for right eye and that for left eye by a data input part 11 and is written in a picture memory 12. When a display part 15 is directed to a reference direction, a reference graphic based on fundamental data is displayed as a picture. Meanwhile, a three-dimensional digitizer 22 detects the position of a sensor based on a current value induced in the sensor moving in a magnetic field, and a visual point position calculation part 23 always calculates the position of a seeing aid device 16 based on the output of the digitizer 22. A picture angle correction part 24 executes the coordinate transform processing, by which the graphic expressed by reference data is rotated at an angle θ in the moving direction of the visual point and is displayed, based on the moving direction and the angle θ of the visual point p. Thus, the object is automatically turned at the time of moving of the visual point so that the side face can be visually recognized.

Description

Detailed Description of the Invention (Industrial Application Field) The present invention relates to an image display device, and particularly to an image display device that displays two left and right images superimposed on a screen, and displays the images by using binocular parallax of the viewer. The present invention relates to a device that allows three-dimensional visualization.

(Prior Art) FIG. 4 shows an example of a conventional configuration of such an image device. In the figure, 1 is a data input unit for inputting image data, etc., 2 is an image memory for storing the image data, and 3 is a data input unit for inputting image data.
1 is a monitor display device, which includes a playback section 4 that reads and plays back image data, and a display section 5 that displays images.

On this display section 5, two left and right images are displayed superimposed. 6 is a visual aid device that transmits one of the left and right images according to the viewer's eyes and allows the image to be viewed three-dimensionally from binocular parallax, such as a scope using a liquid crystal shutter, blue-red filter glasses, polarized light There are glasses that use lenses. An appropriate type of visual aid device is used depending on the image reproduction/display method.

According to such an image display device, even if an object drawn using a CAD system or various computer graphics has a complicated structure, it is possible to more easily recognize the details.

[Problem that the invention seeks to solve]

By the way, in such conventional image display devices, although the reproduced and displayed image can be recognized as if it were an actual object in front of the eyes rather than a mere image, it is difficult to see the side of the object. Since the displayed image itself does not change even if you move your viewpoint to see it, there was a problem that you could not see the side as you expected and it felt strange compared to the actual experience.

Therefore, the purpose of the present invention is to perform natural movements (movement of viewpoint position) that humans normally perform when recognizing the shape of an object, etc.
The object is to enable the object displayed in the image to be viewed from an angle corresponding to the movement of the viewpoint.

[Means for solving problems]

In order to achieve the above object and solve the problems of the prior art, an image display device according to the present invention includes an image memory for storing image data, and a reproducing display means for reproducing and displaying the left and right images superimposed on each other based on the image data. The technical premise is that the image display device is equipped with an image display device that includes a visual aid means that transmits one image corresponding to the eye, and a visual aid means that transmits one image corresponding to the eye, a viewpoint position detection means that detects the position of a viewpoint, and and image angle correction means for executing data coordinate transformation processing.

(Example) Hereinafter, the present invention will be described in detail based on the accompanying drawings.

FIG. 1 shows an example of an image display device according to the present invention, which, like the conventional device, includes a data input section 11 for inputting image data. an image memory 12 that stores the image data;
A monitor display device 1 consisting of a playback section 14 that reads and plays image data and a display section 15 that displays images.
3. In addition to the visual aid device 16 for viewing the displayed image three-dimensionally, the following means are also provided. Reference numeral 21 denotes a viewpoint position detection device for detecting a viewpoint position, which includes a three-dimensional digitizer 22 provided integrally with the visual aid device 16, and a viewpoint position calculation unit 23 for calculating a viewpoint position based on the output of the three-dimensional digitizer 22. It consists of Further, 24 is an image angle correction unit that performs coordinate transformation of image data according to the calculated viewpoint position, 25 is a screen angle correction unit for orienting the display unit 15 in the direction of the calculated viewpoint position, and 26 is the screen This is a drive unit that rotates the display unit 15 based on the output of the angle correction unit 25.

Next, the operation of this device will be explained.

First, data of a figure to be displayed as an image is subjected to predetermined arithmetic processing (three-dimensional coordinate setting processing, etc.) in the data input unit 11, and then separated into right-eye image data and left-eye image data. The data is written to memory 12. This image data is basic data representing each point of a figure to be displayed in three-dimensional coordinates, and when the display section 15 faces the reference direction, a reference figure based on this basic data is displayed as an image. On the other hand, the three-dimensional digitizer 22 detects the position of the sensor based on the current value induced in the sensor moving in a magnetic field.In the case of this device, the viewpoint position calculation unit 23 constantly calculates the position of the visual aid device 16. This position detection is
For example, as shown in FIG. 2, this is done by calculating in which direction the viewpoint P has moved by an angle θ with respect to the reference direction of the 1 display section 15 (indicated by reference numerals in the figure). Next, the image angle correction unit 24 executes a coordinate conversion process based on the movement direction of the viewpoint P and the angle θ to rotate the figure represented by the reference data by the angle θ in the movement direction of the viewpoint and display it. . This will be explained based on FIG. Suppose that the viewpoint P moves to the position P' while viewing the three-dimensional object Q from the reference direction D0. To simplify the explanation, it is assumed that there is no movement in the vertical direction (Z direction). At this time, the viewpoint P has moved ■to the right by ■the angle θ, so in order to obtain the image that can be seen at that time, each constituent point Q (x, y + z) of the object Q must be moved ■to the right (clockwise). direction) by an angle θ. A certain point Q 1 (X 1 * V
Taking i e Z t ) as an example, the coordinates of Q after movement are (X + iy) - 1'' (Xz + i '/1) (cos
nθ)=(X, COSθ+y, sinθ) +i(y, cosθ−x1sinθ) Therefore, Q s (X ICO5θ+y 1sinθ.

y1cosθ−x1sinθ,z). The image angle correction section 24 performs the coordinate transformation processing on each component point of the basic image data, and outputs the result to the reproduction section 14. The playback section 14 performs signal processing based on this new image data, and displays the display section 15.
display the image.

If this is viewed through the visual aid device 16, it can be perceived as if the displayed object had rotated to reveal its side. On the other hand, the screen angle correction section 25 performs calculations for orienting the viewpoint position P' force direction display screen after movement, that is, calculates the drive amount of the display section 15 based on the rotation direction and angle θ, and outputs it to the drive section 26. do. The drive section 26 rotates the display section 15 based on the command. As a result, the display screen always faces forward with respect to the viewpoint, so it is possible to obtain the effect that the image becomes easier to see.

In the above explanation, it was assumed that there is no movement of the viewpoint in the vertical direction (two directions), but if the image angle correction unit 24 performs three-dimensional coordinate transformation, the image object can be moved upward or downward. Of course, it can also be rotated. However, in this case, the calculation becomes complicated, so the responsiveness is slightly lowered, especially when the image object has a complicated structure.

〔Effect of the invention〕

As explained above, the image display device according to the present invention detects the viewpoint position and executes coordinate conversion processing of the basic image data according to the viewpoint position, so that when the viewpoint is moved, the image display device automatically Since it becomes possible to visually check the sides of the object as it rotates, it is possible to recognize figures with complex configurations in a state closer to the actual experience.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing an example of an image processing device according to the present invention, FIG. 2 is a diagram showing the positional relationship between the orientation of the display screen and the viewpoint, and FIG. 3 is a diagram showing the positional relationship between the display object and the viewpoint. figure,
FIG. 4 is a block diagram showing a conventional image display device. 12... Image memory 13... Monitor display (playback display means) 16.
...Visual aid device 21...Visual position detection device 24...Image angle correction unit Patent applicant Nissan Motor Co., Ltd.

Claims (1)

[Claims] An image display device comprising an image memory for storing image data, a reproduction display means for reproducing and displaying a superimposed left and right image based on the image data, and a visual aid means for transmitting one image corresponding to each eye, An image display device comprising: a viewpoint position detection means for detecting the position of a viewpoint; and an image angle correction means for executing coordinate transformation processing of the image data according to the detected viewpoint position.