JP2010140181A - Wipe shape producing device, wipe shape producing method, and program - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To use a complicated shape as a wipe basic shape without enlarging a circuit scale. <P>SOLUTION: A wipe shape producing device 1 for producing a wipe shape to be used for dividing a screen based on the wipe basic shape when combining images on the screen has a basic shape producing unit 13 for forming the wipe basic shape by a Bezier curve in which the shape is varied in response to a coordinate of a control point for controlling the shape. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a wipe shape generation apparatus, a wipe shape generation method, and a program for generating a wipe shape used to divide a screen when a video is synthesized on the screen.

  As a special effect technique for combining two images on the screen, there is a technique called “wipe”. When wipe is used, it is possible to synthesize two images in the wipe shape indicated by the wipe key, and switch the screen image to another image while gradually expanding the wipe shape. The wipe key is a key for creating an effect of dividing and synthesizing the screen. In addition, there are shapes such as a quadrangle, a circle, and a star as shapes for dividing the screen. Hereinafter, the basic shape of the wipe shape indicated by the wipe key is referred to as a basic wipe shape.

  It is desirable that this basic wipe shape can be realized in various shapes in order to give a special effect of image synthesis to a user who views the image. As a technique for realizing this, for example, Patent Document 1 discloses a technique that can round the four corners of a rectangular wipe basic shape.

In the technique disclosed in Patent Document 1, four corners of a square wipe basic shape are arcs, and the radius of the arc can be adjusted. Thereby, the four corners of the quadrilateral of the wipe basic shape can be made into arcs of various sizes.
JP 2007-329742 A

  If the technique disclosed in Patent Document 1 described above is used, the basic shape of the wipe can be made, for example, an ellipse.

  However, it is desirable that a more complex wipe basic shape can be realized in order to give a special effect of video composition with higher impact to the user who views the video.

  However, when the basic shape of the wipe is not a simple figure such as a rectangle or a star, but a complicated shape, there is a problem that the circuit scale increases.

  The basic shape of the wipe is determined in advance by a circuit on hardware such as a device for realizing the wipe. Therefore, in order to change or add the basic shape of the wipe, it is necessary to change or add a circuit, and there is a problem that it involves hardware modification.

  An object of the present invention is to provide a wipe shape generation apparatus, a wipe shape generation method, and a program that solve any of the above-described problems.

In order to achieve the above object, the present invention provides:
A wipe shape generation device that generates a wipe shape used to divide the screen based on a basic wipe shape when compositing an image on a screen,
A basic shape generation unit that forms the wipe basic shape by a Bezier curve whose shape changes in accordance with the coordinates of a control point for controlling the shape.

Further, when synthesizing video on the screen, a wipe shape generation method for generating a wipe shape used for dividing the screen based on a basic wipe shape,
A forming process for forming the wipe basic shape by a Bezier curve in which the shape changes in accordance with the coordinates of a control point for controlling the shape;

In addition, when synthesizing video on the screen, a wipe shape generation device that generates a wipe shape used to divide the screen based on the basic wipe shape,
A forming function for forming the wipe basic shape is realized by a Bezier curve in which the shape changes in accordance with the coordinates of control points for controlling the shape.

  According to the present invention, the wipe shape generation device forms a basic wipe shape by a Bezier curve whose shape changes according to the coordinates of a control point for controlling the shape of the curve. Therefore, a complicated shape can be used as the basic wipe shape without increasing the scale of the circuit.

  Embodiments of the present invention will be described below with reference to the drawings.

  In the present invention, a plurality of Bezier curves are drawn, and a plane figure formed by a complex curve composed of the drawn Bezier curves is defined as a basic wipe shape.

Here, the Bezier curve is one of methods for drawing a complex curve using relatively little data, and is a curve represented by the following equation (1). In equation (1), by changing t from 0 to 1, a Bezier curve having both ends of B ₀ and B _N is drawn.

B _{0 to} B _N are called control points, and various shapes of Bezier curves can be drawn by changing the coordinates of the control points. A method of drawing a Bezier curve using this control point will be described later.

  Also, the coordinates (x, y) on the Bezier curve are obtained by the following equation (2).

  In the embodiment of the present invention described below, a plane figure formed by a complex curve composed of a plurality of cubic Bezier curves is used as a basic wipe shape. Hereinafter, the cubic Bezier curve is referred to as a cubic Bezier curve.

  FIG. 1 is a diagram for explaining a method of drawing a cubic Bezier curve.

  When drawing a Bezier curve, as shown in FIG. 1, four control points B0 to B3 indicated by a black rectangle and a white rectangle in the drawing are given. Of these four control points, two control points indicated by white squares are indicated as an end point B0 and an end point B3 because they are the start point or end point of a Bezier curve. Coordinates on the Bezier curve are obtained based on these four control points, and the Bezier curve can be drawn.

  When obtaining coordinates on the cubic Bezier curve 101 shown in FIG. 1, first, between the end point B0 and the control point B1, between the control point B1 and the control point B2, and between the control point B2 and the end point B3, respectively. P1, P2, and P3, which are points to be divided at a ratio of t: 1−t, are obtained.

  Next, as shown in FIG. 1, two line segments P1-P2 and P2-P3, which are two line segments obtained by connecting these points, are again divided at a ratio of t: 1-t, respectively. A certain P4 and P5 are obtained.

  Then, when P6 which is a point that further divides the line segment P4-P5 connecting these two points at a ratio of t: 1-t is obtained, this P6 becomes a point on the cubic Bezier curve 101. By repeating the above operation in the range of 0 <t <1, the coordinates on the cubic Bezier curve 101 are obtained, and the cubic Bezier curve 101 can be drawn.

(First embodiment)
FIG. 2 is a block diagram showing the configuration of the first embodiment of the wipe shape generation apparatus of the present invention.

  As shown in FIG. 2, the wipe shape generation apparatus 1 of the present embodiment includes a control signal generation unit 11, a control point output unit 12, a basic shape generation unit 13, a waveform function signal generation unit 14, and a level output unit 15. And a cutting part 16.

  The control signal generation unit 11 receives a control signal instructing to use a Bezier curve for the wipe basic shape from a control CPU (Center Processing Unit) (not shown) or the like outside the wipe shape generation apparatus 1. Then, the basic shape generation unit 13 is notified that the Bezier curve is used for the wipe basic shape.

  The control point output unit 12 stores the coordinates of the control points of the Bezier curve, and outputs coordinate information indicating the coordinates to the basic shape generation unit 13.

  When the basic shape generation unit 13 receives notification from the control signal generation unit 11 that a Bezier curve is used for the wipe basic shape, the basic shape generation unit 13 acquires coordinate information from the control point output unit 12. Then, a plurality of Bezier curves are drawn from the coordinates of the control point indicated by the acquired coordinate information. Then, a plane figure formed by a plurality of drawn Bezier curves is set as a wipe basic shape, and wipe basic shape information indicating the wipe basic shape is output to the waveform function signal generation unit 14. The basic wipe shape is specified by the coordinates of the X axis and the Y axis.

  FIG. 3 is a diagram for explaining an example of a method in which the basic shape generation unit 13 illustrated in FIG. 2 forms a wipe basic shape by a Bezier curve. Although a cubic Bezier curve is used here, the same applies to an Nth order Bezier curve.

  When forming the wipe basic shape by the Bezier curve, the end point that is the end point of the m-th Bezier curve and the end point that is the start point of the (m + 1) -th Bezier curve are set to the same coordinates. Also, the end point that is the end point of the last Bezier curve and the end point that is the start point of the first Bezier curve are set to the same coordinates.

  In the example shown in FIG. 3, the end point that is the end point of the cubic Bezier curve 101 and the end point that is the start point of the cubic Bezier curve 102 are the same end point B3. The end point that is the end point of the cubic Bezier curve 104 and the end point that is the start point of the cubic Bezier curve 101 are the same end point B0. Thereby, a plane figure is formed by a plurality of cubic Bezier curves. This planar figure is one of the basic wipe shapes. Although the case where the wipe basic shape is formed by four Bezier curves has been described here, the number of Bezier curves is not limited to four as long as a planar figure can be formed.

  Referring to FIG. 2 again, the waveform function signal generation unit 14 indicates the wipe basic shape indicated by the information output from the basic shape generation unit 13 and specified by the coordinates of the X axis and the Y axis as an amplification value of the video signal. With a certain gain level as the third axis, a three-dimensional figure that is three-dimensionally drawn so as to increase gradually as the level increases is drawn. Then, a waveform function signal indicating the drawn solid figure is generated and output to the cutting unit 16.

  The level output unit 15 receives a level signal indicating a gain level from the outside of the wipe shape generation apparatus 1 and outputs the level signal to the cutting unit 16.

  The cutting unit 16 cuts the solid figure indicated by the waveform function signal output from the waveform function signal generation unit 14 according to the level indicated by the level signal output from the level output unit 15. Then, the shape of the cut surface is changed to a wipe shape, and a wipe key indicating the wipe shape is output to a mixer device (not shown) that synthesizes an image.

  FIG. 4 is a diagram illustrating an example of a cut surface of a three-dimensional figure cut by the cutting unit 16 illustrated in FIG. 2, and FIG. 4A is a diagram illustrating a cut surface when the wipe basic shape is a rectangle. ) Is a diagram showing a cut surface when the basic wipe shape is formed by a Bezier curve.

  In the example shown in FIG. 4, the three-dimensional figure is cut at a level drawn with a dotted line in the drawing. This level is the gain level indicated by the level signal output from the level output unit 15 as described above.

  Below, the operation | movement which produces | generates a wipe shape in the wipe shape production | generation apparatus 1 comprised as mentioned above is demonstrated.

  FIG. 5 is a flowchart for explaining an operation of generating a wipe shape in the wipe shape generating apparatus 1 shown in FIG.

  First, the control signal generation unit 11 receives a control signal for instructing to use a Bezier curve for the wipe basic shape from the outside of the wipe shape generation device 1 (step S1).

  The control signal generator 11 that has received a control signal from the outside of the wipe shape generator 1 notifies the basic shape generator 13 that a Bezier curve is used for the wipe basic shape (step S2).

  The basic shape generation unit 13 that has received the notification from the control signal generation unit 11 acquires coordinate information indicating the coordinates of the control points of the Bezier curve from the control point output unit 12 (step S3).

  The basic shape generation unit 13 that has acquired the coordinate information from the control point output unit 12 draws a plurality of Bezier curves based on the coordinates of the control point indicated by the coordinate information acquired from the control point output unit 12. Then, a plane figure formed by a plurality of drawn Bezier curves is set as a wipe basic shape (step S4), and wipe basic shape information indicating the wipe basic shape is output to the waveform function signal generation unit 14.

  The waveform function signal generation unit 14 that has received the wipe basic shape information output from the basic shape generation unit 13 indicates the wipe basic shape indicated by the received wipe basic shape information and specified by the X-axis and Y-axis coordinates. With the gain level as the third axis, a three-dimensional figure that is three-dimensionally drawn so as to increase gradually as the level increases is drawn.

  Then, the waveform function signal generation unit 14 generates a waveform function signal indicating the rendered three-dimensional figure (step S5), and outputs the generated waveform function signal to the cutting unit 16.

  The cutting unit 16 cuts the solid figure indicated by the waveform function signal output from the waveform function signal generation unit 14 according to the level indicated by the level signal output from the level output unit 15.

  And the cutting | disconnection part 16 makes the shape of the cut | disconnected cut surface a wipe shape (step S6).

  Then, the cutting unit 16 outputs a wipe key indicating the wipe shape to a mixer device or the like that synthesizes the video (step S7).

  As described above, in the first embodiment, the wipe shape generation device 1 forms the wipe basic shape by the Bezier curve whose shape changes in accordance with the coordinates of the control point for controlling the shape of the curve. Therefore, a complicated shape can be used as the basic wipe shape without increasing the scale of the circuit.

  Here, the synthesis of two images using a wipe key indicating the wipe shape generated by the wipe shape generation apparatus 1 shown in FIG. 2 will be described.

  FIG. 6 is a diagram for explaining an example of an operation of combining two images using the wipe key indicating the wipe shape generated by the wipe shape generation apparatus 1 shown in FIG. Here, the two images of image A and image B are synthesized.

  The synthesis of the two images is performed by a mixer device 50 as shown in FIG. 6, for example.

  The mixer device 50 shown in FIG. 6 includes video input units 51 and 52, an output unit 53, and a wipe key receiving unit 54.

  The wipe key receiving unit 54 receives a wipe key 86 output from the outside of the mixer device 50. Then, key signals 87 and 88 are output to the video input units 51 and 52 in accordance with the accepted wipe key 86. Here, one of the key signals 87 and 88 is a signal representing a wipe shape indicated by the wipe key 86, and the other is a signal representing a shape obtained by inverting the wipe shape indicated by the wipe key 86. That is, it can be expressed as “1-key signal 87 = key signal 88”.

  The video input unit 51 receives an input of the video signal 81. Then, the received video signal 81 is converted according to the key signal 87 output from the wipe key receiving unit 54. Then, the converted post-conversion video signal 83 is output to the output unit 53. The video input unit 52 performs the same operation as the video input unit 51. Here, as shown in FIG. 6, the video input unit 51 receives a video signal 81 that is a video signal of video A, and the video input unit 52 receives a video signal 82 that is a video signal of video B. Video A and video B are, for example, videos taken by a video camera.

  The output unit 53 synthesizes the converted video signal 83 output from the video input unit 51 and the converted video signal 84 output from the video input unit 52 and generates a composite video signal 85 as a video output device (not shown). Etc.

  In the mixer device 50 configured as described above, the video A and the video B are synthesized according to the following expression, and a synthesized video based on the synthesized video signal 85 is obtained.

Composite video signal 85 = (video signal 81 × key signal 87) + {video signal 82 × (1-key signal 87)}
(Second Embodiment)
In the first embodiment described above, the coordinates of the Bezier curve control points stored in the control point output unit 12 are used as they are. In the second embodiment described below, a case will be described in which the coordinates of the control points stored in the control point output unit 12 are changed according to the gain level.

  FIG. 7 is a block diagram showing the configuration of the second embodiment of the wipe shape generation apparatus of the present invention.

  As shown in FIG. 7, the wipe shape generation apparatus 2 of the present embodiment is different from the wipe shape generation apparatus 1 of the first embodiment in that a control point calculation unit 27 is added.

The control point calculation unit 27 acquires coordinate information from the control point output unit 22. Then, a function for changing the coordinates of the control points of the Bezier curve is defined according to the level from the acquired coordinate information and the level signal output from the level output unit 25. Then, the function information indicating the defined function and the coordinate information acquired from the control point output unit 22 are output to the basic shape generation unit 23.
Note that the level signal output from the level output unit 25 to the control point calculation unit 27 is the same as the level signal output from the level output unit 25 to the cutting unit 26.

  Below, the operation | movement which produces | generates a wipe shape in the wipe shape production | generation apparatus 2 comprised as mentioned above is demonstrated.

  FIG. 8 is a flowchart for explaining the operation of generating a wipe shape in the wipe shape generating apparatus 2 shown in FIG.

  First, the control signal generation unit 21 receives a control signal for instructing to use a Bezier curve for the wipe basic shape from the outside of the wipe shape generation device 2 (step S21).

  The control signal generation unit 21 that has received a control signal from the outside of the wipe shape generation device 2 notifies the basic shape generation unit 23 that a Bezier curve is used for the wipe basic shape (step S22).

  The control point calculation unit 27 acquires coordinate information indicating the coordinates of the control points of the Bezier curve from the control point output unit 22 (step S23).

  Next, the control point calculation unit 27 calculates the coordinates of the control points of the Bezier curve according to the level from the coordinate information acquired from the control point output unit 22 and the level indicated by the level signal output from the level output unit 25. A function for changing is defined (step S24).

  Then, the control point calculation unit 27 outputs the function information indicating the defined function and the coordinate information acquired from the control point output unit 22 to the basic shape generation unit 23.

  Next, the basic shape generation unit 23 draws a plurality of Bezier curves based on the coordinates of the control points indicated by the coordinate information output from the control point calculation unit 27. A planar figure formed by a plurality of drawn Bezier curves is set as a basic wipe shape (step S25), and the basic wipe shape information indicating the basic wipe shape and the function information output from the control point calculation unit 27 are waveformd. Output to the function signal generator 14.

  The waveform function signal generation unit 24 uses the function indicated by the function information output from the basic shape generation unit 23 based on the wipe basic shape indicated in the wipe basic shape information output from the basic shape generation unit 23 to gain. Draw a solid figure whose shape changes according to the level.

  Then, the waveform function signal generation unit 24 generates a waveform function signal indicating the drawn solid figure (step S26).

  FIG. 9 is a diagram showing an example of a three-dimensional figure drawn by the waveform function signal generation unit 24 shown in FIG. 7 using a function defined by the control point calculation unit 27. FIG. (B) is a figure which shows a mode that the shape of the cut surface of a solid figure changes according to the level of a gain. In FIG. 9B, B0 to B11 indicate control points of the Bezier curve.

  As shown in FIG. 9A, the cut surface of the three-dimensional figure approaches a quadrangle as the gain level increases. Specifically, as shown in FIG. 9B, as the gain level increases, the control points B1, B11 approach the control point B0, the control points B2, B4 approach the control point B3, and the control points B5, B7 Approaching the control point B6, the control points B8 and B10 approach the control point B9.

  As a result, as the gain level increases, the wipe shape approaches a quadrangle surrounded by the control points B0, B3, B6, and B9. This is a morphing of the basic shape of the wipe. Note that morphing generally refers to creating an image for supplementing the middle in order to express a moving image of a gradual change from one shape to another.

  Steps S27 to S28 as subsequent operations are the same as steps S6 to S7 in the flowchart shown in FIG.

  As described above, in the second embodiment, the wipe shape generation device 2 defines a function for changing the coordinates of the control points of the Bezier curve according to the gain level, and is drawn using the defined function. The basic shape of the wipe is formed by a curved Bezier curve. Therefore, a complicated shape corresponding to the gain level can be used as the wipe basic shape.

(Third embodiment)
In the first embodiment and the second embodiment described above, the control point output unit 12 has not received any input. In the third embodiment described below, a case will be described in which the control point output unit 12 receives information indicating the coordinates of the control points of the Bezier curve from the outside.

  FIG. 10 is a block diagram showing the configuration of the third embodiment of the wipe shape generation apparatus of the present invention.

  As shown in FIG. 10, the wipe shape generation apparatus 3 of the present embodiment outputs control points from an external device 5 as compared with the wipe shape generation apparatus 1 of the first embodiment and the wipe shape generation apparatus 2 of the second embodiment. The difference is that there is an input to the unit 32. The external device 5 is, for example, a general-purpose personal computer, a removable storage device, hardware via a network, or the like.

  Below, the operation | movement which produces | generates a wipe shape in the wipe shape production | generation apparatus 3 comprised as mentioned above is demonstrated.

  FIG. 11 is a flowchart for explaining an operation of generating a wipe shape in the wipe shape generating apparatus 3 shown in FIG.

  First, the control signal generation unit 31 receives a control signal for instructing to use a Bezier curve for the wipe basic shape from the outside of the wipe shape generation device 3 (step S41).

  The control signal generator 31 that has received the control signal from the outside of the wipe shape generator 3 notifies the basic shape generator 33 that the Bezier curve is used for the wipe shape (step S42).

The control point output unit 32 receives input of information indicating the coordinates of the control points of the Bezier curve from the external device 5 (step S43).
Steps S44 to S48, which are subsequent operations, are the same as steps S3 to S7 in the flowchart shown in FIG.

  As described above, in the third embodiment, the wipe shape generation device 3 receives input of information indicating the coordinates of the control points of the Bezier curve from the outside of the wipe shape generation device 3, and the Bezier is calculated from the coordinates of the control points indicated by the received information. Draw a curve. Therefore, the wipe basic shape can be changed or added without hardware modification.

  In the present invention, the processing in the wipe shape generation apparatus is implemented on a recording medium readable by the wipe shape generation apparatus, in addition to the processing realized by the dedicated hardware described above. The program may be recorded, and the program recorded on the recording medium may be read and executed by the wipe shape generation apparatus. The recording medium readable by the wipe shape generation device refers to a transfer medium such as a floppy disk, a magneto-optical disk, a DVD, and a CD, and an HDD built in the wipe shape generation device.

It is a figure for demonstrating the method of drawing a cubic Bezier curve. It is a block diagram which shows the structure of 1st Embodiment of the wipe shape generation apparatus of this invention. It is a figure for demonstrating an example of the method in which the basic shape production | generation part shown in FIG. 2 forms a wipe basic shape with a Bezier curve. It is a figure which shows an example of the cut surface of the solid figure cut | disconnected by the cutting part shown in FIG. 3 is a flowchart for explaining an operation of generating a wipe shape in the wipe shape generating apparatus shown in FIG. 2. It is a figure for demonstrating an example of the operation | movement which synthesize | combines two images | videos using the wipe key which shows the wipe shape produced | generated by the wipe shape production | generation apparatus shown in FIG. It is a block diagram which shows the structure of 2nd Embodiment of the wipe shape generation apparatus of this invention. It is a flowchart for demonstrating the operation | movement which produces | generates a wipe shape in the wipe shape generation apparatus shown in FIG. It is a figure which shows an example of the solid figure drawn by the waveform function signal generation part shown in FIG. 7 using the function defined by the control point calculating part. It is a block diagram which shows the structure of 3rd Embodiment of the wipe shape generation apparatus of this invention. It is a flowchart for demonstrating the operation | movement which produces | generates a wipe shape in the wipe shape generation apparatus shown in FIG.

Explanation of symbols

1, 2, 3 Wipe shape generation device 5 External device 11, 21, 31 Control signal generation unit 12, 22, 32 Control point output unit 13, 23, 33 Basic shape generation unit 14, 24, 34 Waveform function signal generation unit 15 , 25, 35 Level output unit 16, 26, 36 Cutting unit 27 Control point calculation unit 50 Mixer device 51, 52 Video input unit 53 Output unit 54 Wipe key receiving unit 81, 82 Video signal 83, 84 Converted video signal 85 Composite video Signal 86 Wipe key 87,88 Key signal 101-104 Tertiary Bezier curve

Claims (12)

A wipe shape generation device that generates a wipe shape used to divide the screen based on a basic wipe shape when compositing an image on a screen,
A wipe shape generation apparatus including a basic shape generation unit that forms the wipe basic shape by a Bezier curve in which the shape changes according to the coordinates of a control point for controlling the shape. The wipe shape generation apparatus according to claim 1,
A control point output unit for storing and outputting coordinate information indicating the coordinates of the control points of the Bezier curve;
The basic shape generation unit draws the Bezier curve from the coordinate information output from the control point output unit, sets a plane figure formed by the drawn Bezier curve as the wipe basic shape, and the wipe basic shape Wipe shape generation device for outputting basic wipe shape information. The wipe shape generation apparatus according to claim 2,
A level output unit for outputting a level signal indicating a gain level;
A control point calculation unit that outputs the coordinate information output from the control point output unit and function information indicating a function for changing the control point indicated by the coordinate information according to the level;
Based on the wipe basic shape indicated by the basic wipe shape information output from the basic shape generation unit, the function indicated by the function information is used to draw a solid figure whose shape changes according to the level, and the drawn A waveform function signal generation unit that generates and outputs a waveform function signal indicating a three-dimensional figure;
The solid figure indicated by the waveform function signal output from the waveform function signal generation unit is cut according to the level indicated by the level signal output from the level output unit, and the shape of the cut surface of the cut solid figure is A wipe shape generation device having a cutting portion that has a wipe shape. In the wipe shape generation device according to claim 2 or 3,
The wipe shape generation apparatus, wherein the control point output unit receives input of information indicating coordinates of control points of the Bezier curve and outputs the received information as the coordinate information. A wipe shape generation method for generating a wipe shape used to divide the screen based on a basic wipe shape when compositing an image on a screen,
A wipe shape generation method including a forming process of forming the wipe basic shape by a Bezier curve in which the shape changes according to the coordinates of a control point for controlling the shape. The wipe shape generation method according to claim 5,
The forming process includes
Drawing the Bezier curve from coordinate information indicating the coordinates of the control points of the Bezier curve;
A wipe shape generation method including: processing a plane figure formed by the drawn Bezier curve as the wipe basic shape. The wipe shape generation method according to claim 6,
A process of drawing a three-dimensional figure whose shape changes according to the level using a function for changing the control point indicated by the coordinate information according to the gain level based on the wipe basic shape;
A wipe shape generation method further comprising: cutting the drawn solid figure according to the level, and setting the cut surface of the cut solid figure to the wipe shape. The wipe shape generation method according to claim 6 or 7,
Processing for receiving input of information indicating the coordinates of the control points of the Bezier curve;
A wipe shape generation method further comprising: processing the received information as the coordinate information. When synthesizing an image on a screen, a wipe shape generation device that generates a wipe shape used to divide the screen based on a basic wipe shape,
A program for realizing a forming function for forming the wipe basic shape by a Bezier curve in which the shape changes according to the coordinates of control points for controlling the shape. The program according to claim 9,
The forming function is
A function of drawing the Bezier curve from coordinate information indicating the coordinates of control points of the Bezier curve;
And a function of setting a planar figure formed by the drawn Bezier curve to the wipe basic shape. The program according to claim 10, wherein
In the wipe shape generation device,
A function of drawing a three-dimensional figure whose shape changes according to the level using a function for changing a control point indicated by the coordinate information according to a gain level based on the wipe basic shape;
The program for further implement | achieving the function which cut | disconnects the drawn solid figure according to the said level, and makes the shape of the cut surface of this cut | disconnected solid figure the said wipe shape. In the program according to claim 10 or 11,
In the wipe shape generation device,
A function of receiving input of information indicating the coordinates of control points of the Bezier curve;
A program for further realizing a function of using the received information as the coordinate information.

Images