JP2634404B2 - 3D image input method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention will be described in the following order.

A. Industrial application fields B. Summary of the invention C. Prior art C. Problems to be solved by the invention E. Means to solve the problems F. Action G. Embodiment G _1. Tablet device G _2. computer G _3. data creation unit G _4. the first cursor display means G _5. drawing display means G _6. image generating apparatus G _7. frame memory group G _8. changeover switch G _9. Deisupurei apparatus G _10. tertiary The present invention relates to a stereoscopic image input method for displaying a stereoscopic image in a system such as CAD and CG (computer graphics).

B. Summary of the Invention The present invention relates to a stereoscopic image input method for inputting a diagram of a plane obtained by projecting a two-dimensional plane of a three-dimensional figure using at least two two-dimensional coordinate planes. A first stage process of displaying a first coordinate plane and inputting a point on the projected figure;
After the first processing, a second coordinate plane is displayed on the screen, and the second coordinate plane is displayed with a cursor from an input enabled area for a point input to the first coordinate plane and displayed on the projected graphic. And the second stage processing of inputting the points (1) and (2), the coordinate input on the second coordinate plane can be easily performed.

C. Prior Art In the field of computer graphics, etc., a right-eye image and a left-eye image are separately displayed on a screen of a display device, and a viewer views the right-eye image with the right eye and the left-eye image with the left eye. Has been proposed (see Japanese Patent Application Laid-Open No. 62-58298). The right-eye image and the left-eye image are displayed on the screen of the stereoscopic image display device in different tones, for example, red and green, respectively, and the viewer sees the same color as each of the right-eye image and the left-eye image. If you look at the screen using your glasses, you can see a stereoscopic image. The right-eye image and the left-eye image represent perspective projection figures when viewing a three-dimensional figure with the right eye or the left eye, respectively, for displaying the right-eye image and the left-eye image to be viewed as a three-dimensional image. Needs to input the three-dimensional coordinates of the three-dimensional figure.

Conventional three-dimensional coordinate input methods include a method using a trackball or a mouse, and a method using a tablet surface. In all of these methods, three-dimensional coordinates are input using at least two two-dimensional coordinate planes (for example, an XY coordinate plane and a ZY coordinate plane) of points on the graphic obtained by projecting the three-dimensional graphic on a two-dimensional plane.

D. Problems to be Solved by the Invention However, in the above-mentioned conventional method, the first coordinate input to the first coordinate plane, for example, the XY coordinate plane, specifies the X and Y coordinates. Can be easily done while looking at the screen, but the next coordinate input on the second coordinate plane, for example, the ZY coordinate plane, specifies only the Z coordinate because the Y coordinate of each point is specified first Is what you do. The input of the Z coordinate is limited to a certain area because the Y coordinate is specified, and it is very difficult to simply input the Z coordinate by looking at the screen. Z at a location that does not match the Y coordinate
When the coordinates are input, the image is not formed as a three-dimensional image, and an input error occurs.

Accordingly, an object of the present invention is to provide a stereoscopic image input method that can easily and accurately input a stereoscopic image.

E. Means for Solving the Problems According to a configuration of the present invention for achieving the above object, there is provided a stereoscopic image input method for inputting three-dimensional coordinates of a three-dimensional figure using at least two two-dimensional coordinate planes. First, a first coordinate plane is displayed on the screen of the first stage, and a first-stage process of inputting a diagram of a plane obtained by projecting on the first coordinate surface; The display above is switched to the second coordinate plane, and the figure input on the first coordinate plane is displayed in an overlapping manner, and each point on the figure input on the first coordinate plane is displayed on the second coordinate plane. The input possible area having a certain width corresponding to the first cursor is sequentially displayed, and a plane obtained by projecting the input possible area having the certain width indicated by the first cursor onto the second coordinate plane is obtained. The diagram of the second car for each point A second stage process for inputting at le, that consists characterized.

F. Operation Therefore, when inputting a three-dimensional image, a diagram of the plane projected on the first coordinate plane in the first-stage processing is input, and the plane diagram projected on the second coordinate plane in the second stage is input. The diagram may be sequentially input by the second cursor for each point of the input plane diagram based on the first cursor having a certain width. Then, since the diagram input on the first coordinate plane in the second stage processing is displayed so as to be superimposed on the second coordinate surface, the input point on the second coordinate surface is the line input on the first coordinate surface. You can check which point in the figure corresponds.

G. Examples Hereinafter, examples of the present invention will be described with reference to the drawings.

FIG. 1 shows a configuration diagram of a computer graphics system.

G ₁ .Tablet device Doublet device 1 is, as shown in detail in FIG.
It has a tablet surface 2 and a stylus 3, and various inputs can be performed by bringing the tip of the stylus 3 into contact with the tablet surface 2. The doublet surface 2 has a coordinate area 2a corresponding to a screen 29 of a display device 28 described below. When the stylus 3 is positioned in the coordinate area 2a, a second cursor 4 indicating the position of the stylus 3 is displayed on the screen 29. Is done. Also, the tablet surface 2
Has a key area 2b for selecting various modes, and the key area 2b has an XY key 5, a ZY key 6, an XZ key 7, a 3D display key 8, a connect point key 9, a draw key 10, and a data retrieve key 11. , Surf eskey 12 and the like are provided. The XY key 5, ZY key 6 and XZ key 7 are
This key is used to read the Y coordinate plane and XZ coordinate plane. The 3D display key 8 is a key for displaying a stereoscopic view of a wire frame. The connector point key 9 is a key for connecting the input points with the input points in a straight line. When the draw key 10 is moved while the stylus 3 is in contact with the tablet surface 2, the coordinates of the input points are input at regular intervals on the trajectory, and the input points are connected before and after to draw a free line. The key that can be. The data retrieve key 11 is a key for reading data, and when this key is selected, data on an input point is displayed on the screen 29. The contents of this data will be described in detail below. The surf eskey 12 is a key for designating an input point and providing a surface.

G _2. Computer The computer 20 operates to execute the contents of the command based on the command signal from the tablet device 1.
For example, when the XY key 5 is selected, the mode is switched to the XY coordinate plane mode. Further, the computer 20 has a data creation unit 21, a first cursor display unit 22, a drawing display unit 23, and the like.

The data creating means 21 includes a line data creating means and a plane data creating means.

G _3. Line data creation unit line data generating means determines the data number, the coordinate values, the attributes for the input point. To determine this, the input points are: P (N, 0) = X, P (N, 1) = Y, P (N, 2) = Z, P (N, 3) = − 1,0 or 1 Is defined as Here, P (N,
0) = X, P (N, 1) = Y, P (N, 2) = Z determines the data number and coordinate value. When only two of the coordinate values X, Y, and Z are determined and the other is undetermined, a very large value is input as the undetermined coordinate value. In this embodiment, a value of 999.0 is input.

Further, the attribute of the input point is determined by P (N, 3) =-1,0 or 1. P (N, 3) =-1 indicates a start point, P (N, 3) = 0 indicates an intermediate point, and P (N, 3) = 1 indicates an end point. For example, P (0,3) =
-1, P (1,3) = 0, P (2,3) = 0, P (3,3) = 0, P (4,3) =
If 1, P (5,3) =-1, P (6,3) = 0, P (7,3) = 1, the result is as shown in FIG. The procedure for determining the attribute will be described with reference to FIGS. 10 and 11.

FIG. 10 shows a flow chart of attribute determination in the connect mode. When the first point (X ₀ , Y ₀ ) is input (step S ₁₁ ), the attribute of the point is unconditionally set to P (0,3). ) = - is determined to 1 (S = -1) (step S _12). Next, the next point (Xn, Yn) (n ≧ 1)
There determines whether the input (step S _13), exit if not input. And point before and the point it is determined whether or not connected in connect mode when entered (step S _14). If not connected, this point (X ₁ , Y ₁ ) becomes the starting point, and the attribute of this point (X ₁ , Y ₁ ) is determined to be P (1,3) = − 1 (S = −1). (step S _12). If connected, it is determined whether or not the next point (X ₂ , Y ₂ ) has been input (step S ₁₅ ). If this point (X ₂ , Y ₂ ) is not input, the previous point (X ₁ , Y ₁ ) is the end point, and the attribute of the previous point (X ₁ , Y ₁ ) is P (1,3) = 1 (S = 1)
It is determined (step S _16). When a point (X ₂ , Y ₂ ) is input, it is determined whether or not this point and the previous point are connected in the connect mode (step).
S ₁₇ ). If the connection is not established, the attribute of this point, which starts from this point, is P (2,3) =-1 (S = -1)
It is determined (step S _12). When connected, the previous point is the middle point, so P (1,3) = 0 (S = 0)
And it made (step S _18). In this case, the following points are input, and before the connection with the point is repeated this loop (step S _15, step S _17, step
S ₁₈₎ is repeated. If there is no input of the next point, the end point is set, and the attribute of the point is P (N, 3) = 1.
(S _N-1 = 1) and ends.

Flow chart of the attribute determination shown in Drow mode in FIG. 11, upon contact of the tip of the stylus 3 in the tablet surface 2, the first point (X _0, Y ₀₎ Monkey input (step S _21), of the point Attribute is unconditionally P
(0,3) =-1 (S = -1) is determined (step
S _22). When the locus of free curve points at predetermined time intervals (Xn, Yn) is input (step S _23), the stylus 3 is determined whether it is up-at that point (step S _24). If stylus 3 is not up, the attribute at that point is P (N, 3) = 0 (S = 0)
Become (step S _25). When stylus 3 is up, the attribute at that point is P (N, 3) = 1 (S =
It becomes 1) and it ends.

The contents of the data are displayed on the screen 29 by pressing the data retrieve key 11 as shown in Table 1 and Table 2 below.

G _4. The first cursor display means said first cursor display means 22, two coordinates in the first-stage treatment (e.g. X, Y) is the second stage another coordinate Z in the processing performed after specified Is indicated by the first cursor 24 when inputting the data. The first cursor 24 has a fixed width d with respect to the true area to be input, and the stylus 3 has a stylus 3 in the input enabled area having the fixed width d.
Is configured to be input as an appropriate value by touching. The first cursor 24 displays an inputtable area in the order of data numbers. When coordinates are input based on the first cursor 24, the first cursor 24 displays an inputtable area of the next data number.

G _5. Drawing display means the drawing displaying means 23, and outputs the data of the coordinates to the image generation apparatus 25 based on the coordinate plane mode, X when the XY coordinate plane mode, the data of the Y coordinate, 3D Deisupurei mode In the case of, the mode of X, Y, Z coordinates
Output to 5.

G _6. Image Generating Device The image generating device 25 creates an image signal for visualizing this data based on the data sent from the computer 20. In the 3D display mode, for example, a left-eye image signal is generated in an odd field and a right-eye image signal is generated in an even field. The video signal generated by the image generation device 25 is output to the frame memory group 26 via _two switching switches SW ₁ , SW ₂ and SW ₃ .

G ₇ .Frame memory group This frame memory group 26 includes four frame memories 26.
_{L 1, 26L 2, 26R 1} , 26R 2 has two frame memories 26L _1,
The other two frame memories 26R ₁ and 26R ₂ are used for the right-eye image for the 26L ₂ left-eye image, respectively. The two left-eye image frame memories 26L ₁ and 26L ₂ or the two right-eye image frame memories 26R ₁ and 26R ₂ each have a changeover switch so that when one is used for writing, the other is used for reading. It is operated by the SW ₂ ~SW _5.

G _8. Changeover switch first switching switch SPW ₁ outputs a video signal of an odd field frame memory 26L to _1, 26L ₂ side for the left-eye image, a frame memory 26R for the right eye image video signal of the even field ₁ , 26R The switching operation to output to the ₂ side is performed. Switching switch 26L ₁ of the second and 3, 26L _2, the first switching switch SW ₁ frame memory 26L ₁ for the left eye image with two image signals transmitted via the, 26L ₂ or the right eye image and outputs to one of the frame memories of use the frame memory 26R _1, 26R _2. The fourth and fifth switching switches SW ₄ and SW ₅ are:
Two a frame memory 26L for the left eye image _1, 26L ₂ or the right-eye image frame memory 26R _1, the left-eye image other than the one used to write of the 26R ₂ frame memories 26L _1, 26L ₂
Or, the left-eye image frame memory 26 other than the one used for writing in the right-eye image frame memories 26R ₁ and 26R ₂
L ₁ , 26L ₂ or the right eye image frame memories 26R ₁ , 26R ₂ . Therefore, writing can be performed simultaneously with reading of the video signal. Changeover switch SW ₆ of the sixth, the odd field of the video signal (left-eye image credit signal) is even field to _1, 26L ₂ side frame memory 26L for the left-eye image when being sent from the frame memory group 26 videos When a signal (right-eye image signal) is being transmitted from the frame memory group 26, a switching operation is performed on the right-eye image frame memories 26R ₁ and 26R ₂ . Frame memory group 26
The image signal read from is converted into an analog signal by the D / A converter 27 and sent to the display device.

G _9. The screen 29 of Deisupurei device the Deisupurei device 28 coordinate plane is displayed according to the coordinate mode selected, and the center of the screen 29 is summer and the center of coordinates.

G10. Three-dimensional coordinate input method The three-dimensional coordinate input method of the above system will be described below.

A method of inputting three-dimensional coordinates will be described with reference to a flowchart shown in FIG. 3, taking as an example a case where a free curve in a three-dimensional space shown in FIG. 4 is input.

First, put the stylus 3 on the XY key 5, ZY key 6 or XZ key 7.
The first coordinate plane is selected from the XY coordinate plane, the ZY coordinate plane, and the XZ coordinate plane by touching (step S ₁ ). For example, when the XY coordinate plane is selected, the XY coordinate plane is displayed on the screen 29.

When positioning the stylus 3 in the coordinate area 2a to the tablet surface 2 a second cursor 4 indicating the position of the stylus 3 is displayed on the screen 29 (step S _2).

As shown in FIG. 4, the stylus 3 is pressed on the tablet surface 2 corresponding to the point of the free curve obtained by projecting the XY coordinate plane, and a projected figure is input. The input of this projected figure is performed by connecting each point with the connect point key 9 or
Alternatively, this is performed by drawing the same graphic as the projected graphic on the tablet surface 2 with the draw key 10. When the coordinates are input, the data number and coordinate values (X,
Y), the attribute is determined (step S _3). Screen 2
In FIG. 9, the input projected figure is displayed as shown in FIG. If the user wants to check the data of the input point, he or she presses the data retrieve key 11. Then, a list of data is displayed on the screen 29 as shown in Table 1 below. This data is from the left end (a) data number D,
(B) X coordinate, (c) Y coordinate, (d) Z coordinate, and (e) attribute S are shown. Since all the Z coordinates have not been determined, a very large value of 999.0 is displayed.

When all of the input in the XY coordinate plane is completed choose another coordinate plane other than XY coordinate plane (step S _4. This first stage process is completed in the second stage the process proceeds.

If the ZY coordinate plane is selected as another coordinate, the ZY coordinate plane is displayed on the screen 29 and the input figure of the XY coordinate plane is displayed as shown in FIG. Then, the input area for the first point of the data number N = 0 at the first cursor display means 22 is displayed in the first cursor 24 (step S _5, step S _6).

The operator moves the stylus 3 to the screen 29
The stylus 3 is pressed at a position corresponding to a point of a free curve obtained by projecting the second cursor 4 displayed on the first cursor 24 having a certain width on the ZY coordinate plane (step). S _7, S _8). When you press stylus 3,
The Z coordinate for the point with data number N = 0 is input. Then, the first cursor 24 moves to the data number N =
The input possible area for one point is indicated, and the point is input as described above. In FIG. 7, the input up to the data number N = 5 has been completed, and the first cursor 24 indicates the input enabled area of the data number N = 6. By performing this for points of all the data number N eighth input figure as shown in FIG obtain three-dimensional coordinate input is completed (step S _9).

In the second stage processing, similarly to the first stage process, the input figure on the ZY coordinate plane is displayed as shown in FIG. 8, and the input figure on the ZY coordinate plane is different from the input figure on the XY coordinate plane in visual representation means.
For example, it is configured to be represented in different colors so that the coordinate plane of the input figure is not mistaken.

To confirm the data after all points have been entered, press the data retrieve key 11 as described above. Then, a list as shown in Table 2 below is displayed on the screen 29. Looking at this, data correction / addition /
Perform the deletion.

In the second stage processing, since all the data of X, Y, and Z are determined, the projection figure on the XZ coordinate plane can be displayed at the same time, so that the input figure can be registered in the three views.

When the 3D display key 8 is selected after the completion of the three-dimensional coordinate input, a three-dimensional figure of the input figure is displayed on the screen 29.

H. Effects of the Invention As described above, according to the present invention, in a three-dimensional image input method for inputting three-dimensional coordinates of a three-dimensional figure using at least two two-dimensional coordinates, a first first image is displayed on a screen of a display device. A first-stage process of displaying a coordinate plane and inputting a diagram of a plane obtained by projecting on the first coordinate surface, and after the first-stage process, displaying the screen on the screen in a second coordinate system. While switching to the plane, the figure input on the first coordinate plane is displayed in a superimposed manner, and the input enabled area corresponding to each point on the figure input on the first coordinate plane is displayed on the second coordinate plane with the cursor. And sequentially display the plane diagram obtained by projecting the input coordinate area indicated by the cursor on the second coordinate plane for each point. Enter the diagram of the plane projected on the first coordinate plane. Since the plane diagram projected on the second coordinate plane in the second stage processing can be sequentially input for each point of the input plane diagram based on the cursor, the input of the stereoscopic image is simple and The effect is that it can be performed accurately. In addition, since the diagram input on the first coordinate plane in the second step processing is displayed so as to be superimposed on the second coordinate plane, the input point on the second coordinate plane is the line input on the first coordinate plane. It is possible to confirm which point in the drawing corresponds, and it is possible to prevent an input error.

[Brief description of the drawings]

1 to 11 show an embodiment of the present invention. FIG. 1 is a configuration diagram of a computer graphics system.
FIG. 2 is a plan view of the tablet device, FIG. 3 is a flow chart of three-dimensional coordinate input, FIG. 4 is a diagram showing a free curve in a three-dimensional space and its projected figure, and FIG. 5 is displayed on a screen. FIG. 6 shows an input figure of an XY coordinate plane, FIG. 6 shows a ZY coordinate plane before point input displayed on a screen, and FIGS. 7 and 8 show input figure of a ZY coordinate plane displayed on a screen; FIG. 9 is a diagram showing a free curve displayed on the screen, FIG. 10 is a flowchart of attribute determination in the connect mode, and FIG. 11 is a flowchart of attribute determination in the draw mode. 24 ... first cursor (cursor), 28 ... display device, 29 ... screen.

Claims (1)

(57) [Claims] 1. A three-dimensional image input method for inputting three-dimensional coordinates of a three-dimensional figure using at least two two-dimensional coordinate planes, wherein a first coordinate plane is displayed on a screen of a display device. A first-stage process of inputting a diagram of a plane obtained by projecting onto a coordinate plane, and after the first-stage process, switching the display on the screen to a second coordinate surface, In the second coordinate plane, an input enabled area having a certain width corresponding to each point on the graphic input on the first coordinate plane is sequentially displayed on the second coordinate plane with the first cursor. A second stage for displaying and inputting a line diagram of a plane obtained by projecting on the second coordinate plane in the input enabled area having a certain width indicated by the first cursor by the second cursor for each point sequentially Processing, and a solid characterized by comprising Image input method.