JPH0915321A - Video display device - Google Patents

Abstract

PURPOSE: To display a three-dimensional video, and to convert it to two-dimensional PPI display or two-dimensional display consisting of range and elevation if necessary and display the result at the same time. CONSTITUTION: A three-dimensional polar coordinate consisting of range, azimuth and elevation is converted into an orthogonal coordinate by polar coordinate converting circuits 111 and 112, and it is converted to two-dimensional display consisting of range and azimuth at the specified elevation by means of a display conversion processing circuit 20 with multiplexor, then it is changed over to three-dimensional display or two-dimensional display through a CPU 103 and a multiplexor 20. In addition, in case of two-dimensional display, the data is subjected to offsetting through multipliers 151 and 152 with accumulator and it is written in a memory 12, then the output is displayed by a monitor 17. On the other hand, the amplitude of a video signal written in the memory is periodically subtracted and controlled so that the picture may disappear gradually.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a video display device for two-dimensionally and three-dimensionally displaying radar video data received from a radar.

[0002]

2. Description of the Related Art FIG. 8 is a block diagram of a conventional radar video display device disclosed in, for example, Japanese Patent Application Laid-Open No. 6-228259. In the figure, 1a and 1b are three-dimensional data consisting of range (hereinafter referred to as Rng) data indicating a beam reaching distance, azimuth (hereinafter referred to as Az) data indicating an azimuth of an antenna, and elevation (hereinafter referred to as El) indicating an elevation angle of the antenna. The polar coordinate conversion circuit 2a to 2e for converting the video showing the position of the target represented by the polar coordinates into the new video represented by the Cartesian coordinates is a multiple output that selects data of two or more inputs and outputs one. Kusa, 3 is CP
U and 4 are data files for outputting various data based on control signals from the CPU 3, 5a to 5e are multipliers with accumulators for multiply-accumulate two inputs, and 6 is a divider for reciprocal Z component data of orthogonal coordinates. , 7
a and 7b are multipliers that output the result of multiplying two inputs, 8a and 8b are FIFO memories that temporarily store the data and output the data in the order in which they were input, and 9 is a case where a discontinuity is conspicuous between the video detection points. In addition, it is a line segment processing circuit that uniformly compensates for it at multiple points.

Reference numeral 10 is a raster display clock, and 11
Is a raster address generator that generates a raster address from a raster display clock, 12 is a drawing memory for display, 13 is a data bus on which various data are shared, and 14 is the brightness of the data written in the drawing memory 12 with time. A trail circuit for gradually reducing the video on the screen and gradually erasing the video on the screen. Reference numeral 15 is an output register & shift register for converting parallel data from the bus 13 into serial data in synchronization with the speed of a scanning line (also called a raster). 1
6 is a D / A converter for converting the serial data output from the output register & shift register 15 from a digital signal to an analog signal, and 17 is an analog signal from the D / A converter 16 for V from the raster address generator 11. /
A monitor that is displayed on the screen in synchronization with the H (vertical / horizontal) signal is a control system 18 that periodically outputs a coefficient to be sent to the trail circuit 14 in response to a control signal from the CPU 3.

Next, the operation of the video apparatus shown in FIG. 8 will be described. In the figure, the input video data is a signal which is the source of the luminance signal of the video display device, and the input R is
The ng data, the Az data, and the El data are original data for determining the display position on the two-dimensional screen of the video device that displays the video data received from the radar. First, the above-described Rng data, Az data, and El data are converted from polar coordinate data to Cartesian coordinate data (x, y, z) by the polar coordinate conversion circuits 1a and 1b as described below.

[0005]

(Equation 1)

The x-component data, y-component data, and z-component data converted by the equation (1) form a three-dimensional coordinate system centered on the antenna.
z) The coordinate system is called the world coordinate system. The x component data, the y component data, and the z component data are input to the multiplexer 2a together with the internally generated unit vector "1", and are sequentially output. First, x component data is output and input to the multipliers 5a to 5c with accumulators. Next, y component data is output and input to the multipliers 5a to 5c with accumulators. Next, z component data is output and input to the multipliers 5a to 5c with accumulators. Next, the unit vector "1" is output and input to the multipliers 5a to 5c with accumulators.

On the other hand, if the operator has the above-mentioned x component data,
For the y-component data and z-component data, move the origin of the coordinates to the center line of the field of view centered on the observer's viewpoint and rotate the coordinate axes to the required angle to display a new coordinate axis or trackball or mouse. When designated using input means (not shown) such as, a control signal is output from the CPU 3. When the data file 4 receives the control signal from the CPU 3, the coordinate origin of the world coordinate system is moved to the center line of the visual field centered on the observer's viewpoint, and the origin of the coordinate is moved to a new angle by rotating the coordinate axis to a required angle. Various coefficients for converting into a viewpoint coordinate system which is a three-dimensional coordinate system are created and output one after another in the data file 4.

For example, first, a coefficient mx1 in the x direction, a coefficient my1 in the y direction, and a coefficient mx1 in the z direction are output, and the multipliers 5a, 5b, 5c with accumulators are respectively output.
Is input to Next, the coefficient mx2 in the x direction, the coefficient my2 in the y direction, and the coefficient mx2 in the z direction are output and input to the multipliers 5a, 5b, and 5c with accumulators, respectively. Further, the coefficient mx3 in the x direction and the coefficient my in the y direction
The coefficient mz3 in the 3 and z directions is output and input to the multipliers 5a, 5b and 5c with accumulators, respectively. Further, a coefficient mx4 in the x direction, a coefficient my4 in the y direction,
The coefficient mz4 in the z direction is output and input to the multipliers 5a, 5b and 5c with accumulators, respectively.
The accumulator-equipped multipliers 5a to 5c perform coordinate conversion matrix calculation based on these data as follows.

[0009]

(Equation 2)

From the equation (3), the world coordinate system (x,
y, z) is converted into a viewpoint coordinate system (X, Y, Z) obtained by rotating the system by a required angle. The X component data output from the multiplier with accumulator 5a is input to the multiplexer 2b, and the Y component data output from the multiplier with accumulator 5b is input to the multiplexer 2c. On the other hand, when the operator wants to move the coordinate axes with respect to the X component data and the Y component data by a required amount, and designates by using an input means (not shown), a control signal from the CPU 3 causes the data file 4 to be displayed in the display area. data A indicating an offset in the x direction,
Data B indicating the y-direction offset of the display area is output and input to the multiplexers 2b and 2c, respectively.
The Z component data output from the accumulator-equipped multiplier 5c is input to the divider 6 and converted into 1 / Z component data which is reciprocal numerical value data. This 1 /
The Z component data is input to the multiplexer 2d together with "1" which is a unit vector.

The three multiplexers 2b, 2c and 2d select one from the two inputs. First, the multiplexer 2b outputs X component data, the multiplier 5d with accumulator inputs it, and the multiplexer 2c outputs Y component data. Output from multiplexer 2d to 1
/ Z component data is output and input to the other input ends of the multipliers 5d and 5e with accumulators. next,
Data A is output from the multiplexer 2b, is input to the multiplier 5d with an accumulator, data B is output from the multiplexer 2c, is input to the multiplier 5e with an accumulator, and '1' (unit vector) is output from the multiplexer 2d, It is input to the other input ends of the multipliers 5d and 5e with accumulators. These data are subjected to the following calculations by the accumulator-equipped multipliers 5d and 5e, and are changed from the three-dimensional viewpoint position coordinates to the two-dimensional display screen coordinate system.

[0012]

(Equation 3)

Here, the values of X / Z and Y / Z become smaller as the value of the Z component data becomes larger. In other words, the image such as a mountain or the distance between a plurality of distant target objects displayed as dots can be displayed as it is farther away and larger as it is closer, and thus perspective display is possible. X'output from multiplier 5d with accumulator
The component data is input to the multiplier 7a, and the Y'component data output from the accumulator-equipped multiplier 5e is input to the multiplier 7b.

On the other hand, when the operator designates with the input means (not shown) in order to enlarge / reduce the above X'component data and Y'component data at a required magnification, the CPU 3
In response to the control signal from the data file 4, the data a indicating the magnification in the x direction is output and input to the other input end of the multiplier 7a, and the data b indicating the magnification in the y direction is output from the data file 4. It is output and input to the other input end of the multiplier 7b. Multiplier 7
In a and 7b, the above X ′ component data and Y ′ component data are converted into data X ″ component data and Y ″ component data obtained by multiplying the magnification a and the magnification b as shown below.

[0015]

(Equation 4)

The X "component data and the Y" component data become signals for displaying an image according to the magnification designated by the operator on the display unit.

The X "component data and the Y" component data output from the multipliers 7a and 7b are both input to the line segment processing circuit 9 via the FIFO memory 8a. A FIFO memory 8a is provided at the other input end of the line segment processing circuit 9.
The video data indicating the strength of the received signal is also simultaneously input via. This video data is as described above.
The luminance signal is displayed at the position indicated by the X "component data and the Y" component data on the screen of the display unit. Note that this video data is subjected to signal processing such as filter processing by a signal processing circuit in the preceding stage (not shown), and for example, only a desired target object is selected and displayed on the display unit, or other than the target object is displayed. It is possible to display the clouds and mountains.

Since the X "component data and the Y" component data are quantized by the Z component data, a line that appears continuous when the magnification is small is discontinuous at a plurality of points when the magnification is increased. It is displayed as and looks unnatural. In such a case, in order to prevent this discontinuous display, the newly created points are evenly filled (interpolated) so that they appear to be continuous. This is the function of the line segment processing circuit 9. For this reason, the line segment processing circuit 9 takes a difference between the X ″ component data and Y ″ component data input this time and the X ″ component data and Y ″ component data input last time, and fills in the difference. The complementary data (new X "component data and Y" component data) is calculated and output to the FIFO memory 8b in the subsequent stage. In addition, when creating video data corresponding to each of the plurality of complementary data, the video data input this time and the video data input last time are compared, and the video data with high brightness is selected. The data is output to the subsequent FIFO memory 8b. This makes it possible to create a plurality of new video data with higher brightness among the different brightnesses of the two points between the discontinuous points, and to supplement the data linearly.

The front and rear FIFO memories 8a and 8b are provided.
And FULL and EM which are signals from the line segment processing circuit 9.
The PTY, WR, and RD signals are control signals for outputting the X ″, Y ″ data and the video data in the order in which they are input. The X ″ component data and Y ″ component data input to the subsequent FIFO memory 8b are output from this FIFO memory 8b, and then input to the multiplexer 2e together with the X display data and Y display data from the raster address generator 11. . Here, in the case of the display, the X display data and the Y display data from the raster address generator 11 are selected, and in the case other than the display, that is,
When writing to the drawing memory 12, the X ″ component data and the Y ″ component data from the FIFO memory 8b are selected.

Further, the video data output from the FIFO memory 8b in the subsequent stage is input to the multiplexer 2e, and the data of the coordinate position designated by the X "component data and the Y" component data at the time of writing in the drawing memory 12 is concerned with the video data. It is written in the drawing memory 12 after being multiplied by the amplitude of the data. Further, when the video data is read from the drawing memory 12, the video of the coordinate position (hereinafter referred to as an address) designated by the X display data and the Y display data from the raster address generator 11 among the video data stored in the drawing memory 12 is read. The data is read and input to the output register & shift register 15 and the trail circuit 14 via the data bus 13. The video data input to the output register & shift register 15 is converted here from parallel data to serial data in synchronization with the speed of the scanning line. The serial video data output from the output register & shift register 15 is input to the D / A converter 16 and converted from digital to analog. The analog signal converted by the D / A converter 16 is input to the monitor 17 together with the V / H (vertical / horizontal) synchronizing signal from the raster address generator 11, and the TV is artificially realized on the two-dimensional display. 3D video display will be displayed.

On the other hand, the video data input to the trail circuit 14 is subtracted by a coefficient which is periodically generated from the control system 18 (slower than the speed of the scanning line), and the subtraction result is the video data from the drawing memory 12. It is stored again at the same address as when it was read. Since this subtraction is performed periodically, the brightness of the video data of the address is gradually reduced. That is, the afterimage of this portion gradually disappears. Since this processing is performed for all addresses, the afterimage gradually disappears over the entire screen. Further, the coefficient of this subtraction can be freely changed by the control signal from the CPU 3, so that it can be erased slowly or quickly. That is, subtraction can be performed in a wide range of patterns, and free video afterimage display can be performed.

[0022]

Since the conventional video display device is constructed as described above, the range (Rng),
3 consisting of azimuth (Az) and elevation (El)
There was a feature that it can express a three-dimensional video display,
Not only the three-dimensional display but also the antenna as the origin, and the predetermined El
PPI (Plan Position Indica) for displaying a two-dimensional plan view composed of Rng-Az in
(tor) display and Rng-El (two-dimensional) display are also possible, and if necessary, from the three-dimensional display to the PPI display or Rn display.
A wide range of radar video display devices capable of converting to g-El display were necessary and effective for display control, but there was a problem that this conversion function was not available.

The present invention has been made to solve the above problems, and provides a video display device capable of displaying three-dimensional video and converting and displaying to PPI display and Rng-El display as required. With the goal.

[0024]

According to a first aspect of the present invention, there is provided a video display device, which comprises a range indicating a reach distance of a beam emitted from an antenna, an azimuth indicating an azimuth of the antenna, and an elevation indicating an elevation angle of the antenna. First conversion means for converting a first video showing the position of the target represented by the dimensional polar coordinates into a second video represented by the Cartesian coordinates, and a second conversion means output from the first conversion means. Second video of the above video is converted to a third video by moving the origin of the coordinates on the center line of the visual field centered on the observer's viewpoint and rotating the coordinate axes to the specified angle in the three-dimensional space. Means and a second video output from the first conversion means, in a two-dimensional space consisting of the range and the azimuth in a predetermined elevation, with the observer's viewpoint as the center. Move the origin of coordinates on the center line,
Third conversion means for converting into a fourth video formed by rotating the coordinate axes at a specified angle in a two-dimensional space, and selection means for selecting either a three-dimensional video or a two-dimensional video, When the selecting means selects the three-dimensional video, the third video is displayed in the three-dimensional display, and when the two-dimensional video is selected, the display means displays the fourth video.

Further, the video display device according to the second aspect of the present invention uses three-dimensional polar coordinates composed of a range indicating the arrival distance of the beam emitted from the antenna, an azimuth indicating the azimuth of the antenna, and an elevation indicating the elevation angle of the antenna. A first converting means for converting the first video showing the position of the represented target object into the second video represented by the rectangular coordinates, and the second video outputted from the first converting means are further added. Second conversion means for converting the origin of the coordinates onto the center line of the visual field centered on the observer's viewpoint and rotating the coordinate axis to a specified angle in the three-dimensional space to convert into a third video; The second video output from the first conversion means is used as a center line of a visual field centered on the observer's viewpoint in a two-dimensional space including the range and the elevation in a predetermined azimuth. Third conversion means for converting the origin of coordinates to a fourth video formed by rotating the coordinate axis at a specified angle in a two-dimensional space, and either a three-dimensional video or a two-dimensional video And a display means for displaying the third video in three dimensions when the three-dimensional video is selected by the selection means, and displaying the fourth video when the two-dimensional video is selected. It is equipped with.

The video display device according to the third aspect of the invention is a two-dimensional structure comprising elevation selection means for selecting a plurality of elevations, and a range and azimuth in each elevation selected by the elevation selection means. And a display unit for displaying the fourth video represented by the multi-window display.

Further, the video display device according to the fourth aspect of the invention is represented by a two-dimensional structure including an azimuth selecting means for selecting a plurality of azimuths and a range and an elevation in each azimuth selected by the azimuth selecting means. And a display means for displaying a fifth video in a multi-window manner.

Further, the video display device according to the fifth aspect of the invention displays the position of the target represented by the two-dimensional polar coordinates consisting of the range indicating the reach of the beam emitted from the antenna and the azimuth indicating the azimuth of the antenna. The first conversion means for converting the first video shown to the second video represented by the orthogonal coordinates and the second video output from the first conversion means are further centered on the viewpoint of the observer. Third conversion means for converting the origin of the coordinates onto the center line of the field of view and rotating the coordinate axes at a designated two-dimensional angle, and third conversion means for converting the third video, and output from the second conversion means. Third converting means for creating a fourth video represented in three dimensions based on the third video and the elevation indicating a predetermined elevation angle of the antenna, and the fourth converting means output from the third converting means. More videos of the observer A fourth conversion means for converting the origin of the coordinates to the center line of the visual field centered on the viewpoint and rotating the coordinate axes to the designated three-dimensional angle to convert the fifth video into two-dimensional video. Selecting means for selecting one of the three-dimensional videos and selecting the two-dimensional video causes the third video to be displayed in the two-dimensional, and selecting the three-dimensional video causes the fifth video to be displayed. Is provided in three dimensions.

Further, in the video display device according to the sixth aspect of the present invention, when three-dimensional video is selected as the display means, the larger the data in the depth direction, the smaller the size of the plane perpendicular to the depth direction, and the perspective display. It is equipped with a perspective display means.

In the video display device according to the seventh aspect of the invention, when the display means selects a three-dimensional video, the display means is provided with an expansion / contraction means for expanding / contracting the three-dimensional video by a designated magnification.

In the video display device according to the eighth aspect of the invention, the display means periodically stores the storage means for storing the received video signal and the video signal stored in the storage means. An afterimage processing means for storing the result as a new video signal in the storage means again, and an afterimage display means for displaying the video signal stored in the storage means on the screen.

Further, in the video display device according to the ninth invention, the fourth conversion means selects a video from one video selection means, and the video selected by the video selection means is converted into a coordinate in a three-dimensional space. It is provided with a control means for controlling so as to be arranged at the origin.

Further, in the video display device according to the tenth aspect of the invention, the fourth converting means displays a screen when the video selecting means selects one video and the video selected by the video selecting means is the viewpoint position. In the three-dimensional space shown in Fig. 3, the control means for controlling the antenna to be arranged at the origin of the coordinates is provided.

Further, in the video display device according to the eleventh invention, the fourth conversion means selects a video selection means for selecting two videos, and the first selection means selected by the video selection means.
And the control means for controlling such that the second video is placed at the origin of the coordinates in the three-dimensional space projected on the screen in this case.

[0035]

In the video display device according to the first aspect of the present invention, the first converting means is composed of a range indicating a reach distance of a beam emitted from the antenna, an azimuth indicating an azimuth of the antenna, and an elevation indicating an elevation angle of the antenna. The first video showing the position of the target in dimensional polar coordinates is transformed into a second video in Cartesian coordinates. Also, the second
The converting means moves the origin of the coordinates of the second video outputted from the first converting means to the center line of the visual field centering on the viewpoint of the observer, and the coordinate axis is set to the designated angle in the three-dimensional space. To a third video that is rotated. Also, the third conversion means provides a field of view of the second video output from the first conversion means in a two-dimensional space consisting of the range and the azimuth in a predetermined elevation, with the observer's viewpoint as the center. The origin of the coordinates is moved to the center line of the, and the coordinate axis is rotated to a specified angle in the two-dimensional space to convert into a fourth video. Also,
The selection means selects either 3D video or 2D video. In addition, as for the display means, the selection means is the above-mentioned 3
Selecting a dimensional video displays the third video in three dimensions and selecting the two dimensional video displays the fourth video.

In the video display device according to the second aspect of the present invention, the first conversion means is based on a range indicating a reach distance of a beam emitted from the antenna, an azimuth indicating an azimuth of the antenna, and an elevation indicating an elevation angle of the antenna. The first video showing the position of the target represented by the three-dimensional polar coordinates is converted into the second video represented by the Cartesian coordinates.
Further, the second conversion means further moves the origin of the coordinates of the second video outputted from the first conversion means onto the center line of the visual field centered on the observer's point of view to specify the origin in the three-dimensional space. Convert to a third video by rotating the coordinate axes to different angles. In addition, the second video output from the third conversion means and the first conversion means is a visual field centered on the viewpoint of the observer in a two-dimensional space including the range and the elevation in a predetermined azimuth. The origin of the coordinates is moved to the center line of the, and the coordinate axis is rotated to a specified angle in the two-dimensional space to convert into a fourth video. Also, the selecting means selects either a three-dimensional video or a two-dimensional video. The display means displays the third video in three dimensions when the selection means selects the three-dimensional video, and displays the fourth video when the two-dimensional video is selected.

In the video display device according to the third invention, the elevation selecting means selects a plurality of elevations. Further, the display means multi-windows the fourth video represented by a two-dimensional plane composed of the range and azimuth in each elevation selected by the elevation selection means.

Further, in the video display device according to the fourth aspect of the invention, the azimuth selecting means selects a plurality of azimuths. Further, the display means displays a multi-window display of the fifth video represented by two dimensions, which is the range and elevation in each azimuth selected by the azimuth selection means.

In the video display device according to the fifth aspect of the present invention, the first conversion means is represented by two-dimensional polar coordinates composed of a range indicating the arrival distance of the beam emitted from the antenna and azimuth indicating the azimuth of the antenna. The first video showing the position of the target is converted into a second video represented by Cartesian coordinates. Further, the origin of the coordinates of the second video outputted from the third conversion means and the first conversion means is further moved to the center line of the visual field centering on the viewpoint of the observer, and the designated two-dimensional Convert to a third video that rotates the coordinate axes to an angle. Also, the third converting means creates a fourth video represented in three dimensions based on the third video output from the second converting means and the elevation indicating the predetermined elevation angle of the antenna. Further, the fourth converting means further moves the origin of the coordinates of the fourth video outputted from the third converting means to the center line of the visual field centering on the observer's viewpoint, and the designated three-dimensional Convert to a fifth video that rotates the coordinate axes to an angle. Also, the selecting means selects either a two-dimensional video or a three-dimensional video. The display means displays the third video in two dimensions when selecting the two-dimensional video, and displays the fifth video in three dimensions when selecting the three-dimensional video.

Further, in the video display device according to the sixth aspect of the present invention, when the perspective display means selects a three-dimensional video, the larger the data in the depth direction, the smaller the size of the plane perpendicular to the depth direction and the perspective. indicate.

In the video display device according to the seventh invention, when the expansion / contraction means selects a three-dimensional video,
Scales a 3D video by a specified scale factor.

Further, in the video display device according to the eighth invention, the storage means stores the received video signal.
The afterimage processing means periodically subtracts the video signal stored in the storage means, and stores the subtracted result as a new video signal in the storage means again. The afterimage display means displays the video signal stored in the storage means on the screen.

In the video display device according to the ninth invention, the video selection means selects one video. Further, the control means controls the video selected by the video selection means to be arranged at the origin of the coordinates of the three-dimensional space.

Further, in the video display device according to the tenth aspect of the invention, the video selection means selects one video. Further, the control means controls the antenna so as to be arranged at the origin of the coordinates in the three-dimensional space displayed on the screen when the video selected by the video selection means is set as the viewpoint position.

In the video display device according to the eleventh aspect of the invention, the video selection means selects two videos, and the control means arranges the first video selected by the video selection means at the viewpoint position. In this case, the second video is controlled to be located at the origin of the coordinates in the three-dimensional space projected on the screen.

[0046]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. Embodiment 1 FIG. FIG. 1 is a block diagram showing a video display device according to an embodiment of the present invention, and the same reference numerals as those in FIG. 8 indicate the same or corresponding portions. In the figure, 19 is an input E
An El extraction circuit for selecting one of the l data under the control of the CPU, and a function 20 for selecting either one of the two-dimensional video display and the three-dimensional video display under the control of the CPU3. A display conversion processing circuit with a multiplexer having a multiplexer function of selecting data of input or more and outputting it as one output, 71 and 72 are 2
Multiplier for multiplying inputs, 103 is CPU, 1
11, 112 are input Az data, Rng data,
Polar coordinate conversion circuit 121-124 for converting the video showing the position of the target represented by the three-dimensional polar coordinate composed of the El data into the new video represented by the rectangular coordinate, and selecting the data of two or more inputs. , A multiplexer that outputs one output, and 151 to 157 are multipliers with accumulators that perform a multiply-accumulate operation on two inputs.

Next, the operation of the video apparatus shown in FIG. 1 will be described. In the figure, the input El data is input to the El extraction circuit 19. Here, the operator wants El
When data, for example, 'E0' is designated by the input means (not shown), a control signal is output from the CPU 103, and one angle'E0 'out of the El data input by the El extraction circuit 19 is output by this control signal. Be elected. The selected data is input to the polar coordinate conversion circuits 111 and 112 together with the Rng data and Az data of the input data, and as shown below, the polar coordinate data is converted to the rectangular coordinate data (x,
y, z).

X = RcosE0cosA y = RcosE0sinA z = RsinE0 where R is Rng data and E0 is predetermined El data.
A is Az data.

The converted x component data, y component data, and z component data constitute a world coordinate system (x, y, z) centered on the antenna. This x component data, y
The component data and the z component data are input to the display conversion processing circuit 20 with a multiplexer. On the other hand, when the operator designates the input means (not shown), the CPU 103
In the display conversion processing circuit with a multiplexer 20, either one of a two-dimensional video display and a three-dimensional video display is selected by a control signal from the multiplexer. Further, in the case of a two-dimensional video display by the selection function of the multiplexer. First, the x component data is output and input to the multipliers 151 and 152 with accumulators. Next, the y-component data is output, and the multiplier with accumulator 15
Input to 1 and 152, then unit vector '1'
Is output and the multiplier 151 with accumulator
And 152. In the case of three-dimensional video display, x-component data is first output and input to accumulator-equipped multipliers 153 to 155, then y-component data is output, and accumulator-equipped multiplier 15 is output.
3 to 155, then the z component data is output,
It is input to the multipliers 153 to 155 with accumulators, then "1" which is a unit vector is output, and is input to the multipliers 153 to 155 with an accumulator.

On the other hand, when the operator designates using the input means (not shown) to rotate and display the coordinate system at a required angle with respect to the world coordinate system, the CPU 103
When a control signal is output from the data file 4 and the control signal is input to the data file 4, the viewpoint coordinate system is a new three-dimensional coordinate system that rotates the world coordinate system from the data file 4 to the angle specified by the operator. The various coefficients for conversion into are output one after another.

For example, in the case of three-dimensional display, first, a coefficient mx1 in the x direction, a coefficient my1 in the y direction, and a coefficient mz1 in the z direction.
Is output, and mx1 is input to the multipliers 151 and 153 with accumulators. my1 is input to the multipliers 152 and 154 with accumulator, and mz
1 is input to the multiplier 155 with accumulator. Next, the coefficient mx2 in the x direction and the coefficient my2, z in the y direction
The coefficient mz2 of the direction is output and similarly input to the multipliers 151 to 155 with accumulators, respectively. Further, a coefficient mx3 in the x direction, a coefficient my3 in the y direction,
The coefficient mz3 in the z direction is output and similarly input to the multipliers 151 to 155 with accumulators, respectively. Further, a coefficient mx4 in the x direction, a coefficient my4 in the y direction,
The coefficient mz4 in the z direction is output and similarly input to the multipliers 151 to 155 with accumulators, respectively.

In the case of two-dimensional display, first the coefficient m in the x direction
The coefficient my1 in the x1 and y directions is output, and mx1 is input to the multipliers 151 and 153 with accumulators. my1 is a multiplier 152 with accumulator
And 154 are input. Next, the coefficient mx2, y in the x direction
The directional coefficient my2 is output and similarly input to the multipliers 151 to 154 with accumulators, respectively. Further, the coefficient mx3 in the x direction and the coefficient my3 in the y direction are output and similarly input to the multipliers 151 to 154 with accumulators, respectively. Further, the coefficient mx4 in the x direction and the coefficient my4 in the y direction are output, and similarly, the multipliers 151 to 154 with accumulators are respectively output.
Is input to

After that, 3 consisting of multipliers 153-157 with accumulators, multiplexers 121-123, divider 6, multipliers 71, 72
For three-dimensional video processing, the conventional multiplier with accumulator, 5a to 5e, and multiplexers 2b to 1
The description is omitted because it is the same as the three-dimensional video processing including 2d, the divider 6, and the multipliers 7a and 7b.

The two-dimensional video processing will be described below. Multipliers 151-152 with accumulator
Then, based on the data mx1, mx2, ..., My4, the matrix calculation for coordinate conversion is performed as follows.

[0055]

(Equation 5)

As a result, the world coordinate system (x, y) centering on the antenna is converted into the viewpoint coordinate system (X, Y) obtained by rotating and moving the coordinate system by a required angle.

Multiplier 15 with accumulator
The X component data and the Y component data output from the first and the second 152 are passed through a FIFO memory (not shown) and a line segment processing circuit (not shown), and then the raster address generator 1
It is input to the multiplexer 124 together with the X display address and the Y display address from 1. Multiplexer 124
At the time of writing, the video data is written to the drawing memory 12 after being positioned at the address designated by the X component data and the Y component data when writing to the drawing memory 12.

When the video data is read from the drawing memory 12, the X display address and the Y from the raster address generator 11 selected by the multiplexer 124 are selected from the video data stored in the drawing memory 12.
Video data at the address specified by the display address is read out and input to the data bus 13. Data bus 1
Data from 3 is output register & shift register 15
Is output to the trail circuit 14. The data input to the output register & shift register is the D / A converter 16
Is converted from a digital signal to an analog signal by
The analog signal converted by the D / A converter 16 is
It is output to the monitor 17 together with the V / H synchronization signal from the raster address generator 11, and the monitor 17 provides a TV video display realized on the display.

On the other hand, the data input to the trail circuit 14 is subtracted by a coefficient which is periodically generated from the control system 18, and the subtraction result is the same address as the address when the video data is read from the drawing memory 12. Will be remembered again. Since this subtraction is performed periodically, the brightness of the video data of the address is gradually reduced. That is, the afterimage of this portion gradually disappears. Since this processing is performed for all addresses, the afterimage gradually disappears over the entire screen. Also,
Since the coefficient of this subtraction can be freely changed by the control signal from the CPU 103, it can be erased slowly or quickly. That is, subtraction can be performed in a wide range of patterns, and free video afterimage display can be performed.

The circuits after the multiplexer 124 relating to the processing of the three-dimensional video display are the same as those in the two-dimensional video display processing, and therefore the description thereof will be omitted.

By the above processing, three-dimensional video display,
It is possible to switch between the two-dimensional PPI display that displays only one angle of the El data, and thereby realize the video display device that can express the video resolution characteristic in the El direction.

Example 2. FIG. 2 is a block diagram showing a video display device according to another embodiment of the present invention.
The same reference numerals as those in FIG. 1 indicate the same or corresponding portions. In the figure,
21 indicates one angle of the input Az data by the CPU
Az extraction circuit selected by control of CPU 203 is a CPU
It is.

Next, the operation of the above video display device will be described with reference to FIG. In the figure, the input Az data is
It is input to the Az extraction circuit 21 and one of a plurality of Az data (for example, 'A
0 ') is elected. The selected data is the polar coordinate conversion circuit 21 together with the Rng data and El data of the input data.
2 is input and converted from polar coordinate data to rectangular coordinate data (x, y, z) by the following formula.

X = RcosEcosA0 y = RcosEsinA0 z = RsinE where R is Rng data, E is El data, and A0 is predetermined Az data. The subsequent processing is almost the same as that of the first embodiment.

By the above processing, a two-dimensional Rng for displaying only one angle of Az data from a three-dimensional video display
A video display device is realized which is capable of converting to −El display, and by which the video resolution characteristics in the Az direction can be expressed.

Example 3. FIG. 3 is a block diagram showing a video display device according to another embodiment of the present invention.
The same reference numerals as those in FIG. 1 indicate the same or corresponding portions. In the figure,
Numeral 22 is an El selection number management circuit which makes it possible to select two or more kinds of El angles and display the two-dimensional PPI display by the selected number in a multi-window manner, and 303 is a CPU.

Next, the operation of the above video display device will be described with reference to FIG. In the figure, when the operator designates two or more kinds of desired El data (for example, El1 and El2) through an input means (not shown), the designated data together with the number of the El are selected in the order designated via the CPU 303. It is set in the management circuit 22 and sequentially stored. When the setting process of the plurality of El data in the El selected number management circuit 22 is completed, the El selected number management circuit 22 outputs the earliest designated data El1 and E
It is input to the l extraction circuit 19. The El signal, which is the input data, is sent by the El extraction circuit 19 to the earliest data El
The above data E of the input El signal is compared with 1
Only PPI data that matches l1 are selected. The X component data and the Y component data of the PPI data selected by the elevation "El1" are input until the multiplexer 23 with the El selection control system is input.
Is processed in the same way as

Further, the multiplexer 23 with the El selection control system has a counter (the initial value of the counter is "0") indicating the order of the input PPI data, and inputs the selected data El1. Then, the above counter is incremented by 1 to be "1". This count value “1” is input from the multiplexer 23 with the El selection control system to the El selection number management circuit 22, and the El selection number management circuit 22
The number of designated El data stored in advance ('2' in this example) is compared with the count value '1' from the multiplexer 23 with the El selection control system, and if they do not match, the El extraction circuit 19 is entered. The next data El2 is output. The El signal which is the input data is the El extraction circuit 1
At 9, the data El2 is compared, and only the PPI data matching the data El2 of the input El signals is selected. The X component data and Y component data of the PPI data selected by the elevation "El2" are the multiplexer 2 with the El selection control system.
It is processed in the same manner as in the first embodiment until it is input to the third item.

When the multiplexer 23 with the El selection control system inputs the next selected data El2, the above counter is incremented by 1 to "2". This count value “2” is input from the multiplexer 23 with the El selection control system to the El selection number management circuit 22, and the El selection number management circuit 22
The number of designated El data stored in advance ('2' in this example) and the count value '2' from the multiplexer 23 with the El selection control system are compared and coincide with each other, so that the process ends. (Usually, this process is repeated until all the data specified by the operator has been processed.)

On the other hand, the 2D video display processing data or 3D video display processing data input to the multiplexer 23 with the El selection control system is selected by the control signal from the CPU 303 based on the instruction of the operator, and is written in the drawing memory 12. It is output as information. On the other hand, the video data received via the pre-stage circuit is input to the multiplexer 23 with the El selection control system, selected by the control signal from the CPU 303, and output to the drawing memory 12. The following processing is performed on the video data input to the drawing memory 12 and the write address information from the two-dimensional video display processing. The drawing memory 12 stores the data in the multi-window format until the selection completion data is sent from the El selection number management circuit 22. The two-dimensional and three-dimensional data are discriminated from each other by the control signal from the CPU 303 as described above. In the case of 3D video display processing,
The same process as in Examples 1 and 2 is performed. Further, the subsequent processing is the same as in the first and second embodiments, and therefore the description thereof will be omitted.

By the above processing, two or more kinds of El angle data are selected from the three-dimensional video display, and each two-dimensional PP is selected.
It becomes possible to convert to I display. In addition, it becomes possible to display each of the converted PPI displays in a multi-window display, whereby the video resolution characteristics in the El direction can be expressed more easily than in Example 1, and the control force in the El angle direction can be improved. Play.

Example 4. FIG. 4 is a block diagram showing a video display device according to another embodiment of the present invention.
The same reference numerals as those in FIG. 2 indicate the same or corresponding parts. In the figure, 24 is an Az selection number management circuit 24, 25 that enables selection of two or more types of Az angles and multi-window display of two-dimensional Rng-El displays corresponding to the selected number. Multiplexer, 4
Reference numeral 03 is a CPU.

Next, the operation of the video display device will be described with reference to FIG. In the figure, when the operator specifies two or more kinds of desired Az angles through an input means (not shown), the specified data (for example, Az1 and Az2) is stored in CP together with the number of data (in the above example, "2").
Az selection number management circuit 2 in the order specified via U403
4 is set and stored. Then, the Az selection number management circuit 24 outputs the earliest designated data Az1 and inputs it to the Az extraction circuit 21. When the Az signal which is the input data is input to the Az extraction circuit 21, Az signal
Compared with the earliest data Az1 from the selection number management circuit 24, only the matched (Az1 in the above example) Rng-El data of the input Az signals is selected. The X component data and Y component data of the Rng-El data selected by Az1 are processed in the same manner as in the second embodiment until input to the multiplexer 25 with the Az selection control system.

Further, the multiplexer 25 with the Az selection control system is provided with a counter (the initial value of the counter is "0") indicating the number of data of the input Rng-El data, and the Rng selected by the above Az1.
-When El data is input, the above counter is incremented by 1 and becomes "1". This count value "1" is A
It is input from the multiplexer 25 with a z selection control system to the Az selection number management circuit 24, and the Az selection number management circuit 24 specifies the number of designated Az data stored in advance (“2” in this example) and the Az selection. If the count value "1" from the multiplexer 25 with the control system is compared and they do not match, the Az extraction circuit 21
The next Az data Az2 is output to. As a result, the same operation as described above is performed on the data Az2. This behavior is
The designated A stored in the Az selection number management circuit 24
The process is repeated until the number of z data matches the count value from the multiplexer 25 with the Az selection control system (in this example, the second time), that is, until all the data designated by the operator are processed.

On the other hand, the two-dimensional video display processing data or the three-dimensional video display processing data input to the multiplexer 25 with the Az selection control system is selected by the control signal from the CPU 403 based on the instruction of the operator and is output to the drawing memory 12. It It is output to the drawing memory 12 as write address information. On the other hand, after the video data received via the preceding circuit is input to the multiplexer 25 with the Az selection control system,
It is selected by the control signal from the CPU 403 and output to the drawing memory 12. The following processing is performed on the video data input to the drawing memory 12 and the write address information from the two-dimensional video display processing. Drawing memory 12
The data input to is subjected to the following processing only in the case of the two-dimensional video display processing. Until the drawing completion data is sent from the Az selection number management circuit 24 to the drawing memory 12,
Store data in multi-window format. The two-dimensional and three-dimensional data are identified by the CPU 403 as described above.
By a control signal from. In the case of three-dimensional video display processing, it is processed in the same manner as in the first and second embodiments. The subsequent processing is also the same as in the first, second, and third embodiments, and therefore the description thereof is omitted.

By the above processing, two or more kinds of Az angle data are selected from the three-dimensional video display, and each two-dimensional Rn angle data is selected.
Conversion into g-El display is possible. In addition, it is possible to display each of the converted Rng-El displays in a multi-window manner, which makes it possible to express the video resolution characteristics in the Az direction more easily than in Example 2 and to increase the control force in the Az angle direction. A featured video display device is realized.

Embodiment 5 FIG. FIG. 5 is a block diagram showing a video display device according to another embodiment of the present invention. The above-described first to fourth embodiments are versatile video display devices that enable conversion from a three-dimensional video display to a two-dimensional video display and express video resolution characteristics.
In this embodiment, the display is converted from a two-dimensional PPI display to a three-dimensional video display. In the figure, the same reference numerals as those in FIG. 1 indicate the same or corresponding portions, and 26 is a multiplexer with a radar video selection control system that enables one two-dimensional PPI display data to be selected by CPU control, and 27 is an arbitrary viewpoint. A tracking visual field determination circuit that performs coordinate system conversion by CPU control so that the video viewed from the position is arranged at the origin of the coordinate axis (referred to as the visual field center), and 28 detects 3D radar video information of the selected video 3
A three-dimensional video data detection circuit, 503 is a CPU, 511 is Rng data, and polar coordinate conversion circuits 512 and 51 for converting Az data from polar coordinate data to rectangular coordinate data.
3 is R output from the three-dimensional video data detection circuit 28
Polar coordinate conversion circuit for converting ng data, Az data, and El data from polar coordinate data to rectangular coordinate data, 5
Reference numerals 21 and 526 are multiplexers for selecting data of two or more inputs and outputting one output, and reference numerals 551 to 557 are multipliers with accumulators for multiplying and accumulating two inputs.

Next, the operation of the video display device will be described with reference to FIG. In the figure, a video showing the position of a target represented by two-dimensional polar coordinates composed of the input Rng data and Az data is input to a polar coordinate conversion circuit 511, and the polar coordinate data is converted into the rectangular coordinate data (x, y).

X = RcosAz y = RsinAz

The converted x component data and y component data are input to the multiplexer 521 together with the unit vector,
The data is output from the multiplexer 521 as one data signal in which two or more types of data are selected. The output data is mx which is output from the data file 4 by the control signal from the CPU 503 based on the instruction of the operator.
The data of 1, my1, mx2, my2, mx4, my4 together with the multipliers 551, 5 with accumulator
It is input to 52 and the following matrix calculation is performed.

[0081]

(Equation 6)

Multiplier 55 with accumulator
The data output from the reference numerals 1 and 552 is supplied to the multiplexer 2 with the radar video selection control system together with the X and Y display addresses from the raster address generator 11.
6 is input, and 2 is generated by the control signal from the CPU 503.
One is selected to perform three-dimensional PPI display processing and one to be converted into three-dimensional video display.

The data subjected to the PPI display process is input to the drawing memory 12 together with the video data. On the other hand, the data converted into the three-dimensional video display is input to the three-dimensional video data detection circuit 28 together with the output from the tracking visual field determination circuit 27 which can determine the visual field center by the control signal from the CPU 3. Three-dimensional video data detection circuit 28
Then, with the output from 27 and the input El data, the three-dimensional information data (Rng, Az, El) of the video
Is detected. The detected three-dimensional information data is input to polar coordinate conversion circuits 512 and 513, and converted from polar coordinates to Cartesian coordinates (x, y, z). Subsequent multiplexer 522, multipliers 553 to 557 with accumulators, multiplexers 523, 524, 5
The three-dimensional processing including 25, the divider 6, and the multipliers 71 and 72 is the same as that in the first embodiment, and thus the description thereof is omitted.

After both the two-dimensional PPI display processing and the three-dimensional video display processing are processed in the same manner as in the first to fourth embodiments after being input to the memory, description thereof will be omitted.

Through the above processing, the PP controlled by the CPU
The selected radar video data from the I display can be converted into a three-dimensional video display in which data in the elevation direction is added, and a three-dimensional tracking display can be performed. As a result, a video display device is realized which has a wide range of video control and measures the control increase.

Embodiment 6 FIG. FIG. 6 is a block diagram showing a video display device according to another embodiment of the present invention.
The same reference numerals as those in FIG. 5 indicate the same or corresponding parts. In the figure,
Reference numeral 29 is a viewpoint position determination circuit that performs coordinate conversion so that the selected video comes to the viewpoint position, and 603 is a CPU.

Next, the operation of the video display device will be described with reference to FIG. In the figure, polar coordinate conversion circuit 511,
The operations up to the multiplexer 521, the accumulator-equipped multipliers 551 and 552, and the radar video selection control system-equipped multiplexer 26 are the same as those in the fifth embodiment, and the description thereof will be omitted.

The data subjected to the two-dimensional PPI display processing by the multiplexer 26 with the radar video selection control system is input to the drawing memory 12 together with the video data. On the other hand, the data converted into the three-dimensional video display by the multiplexer 26 with the radar video selection control system is detected by the control signal from the CPU 603 together with the output from the viewpoint position determining circuit 29 which can determine the central viewpoint position and the three-dimensional video data is detected. It is input to the circuit 28. In the 3D video data detection circuit 28, the 3D information data (Rng, Rng,
Az, El) is detected. The processing after the detection is the same as that in the fifth embodiment, and therefore the description thereof is omitted.

Through the above processing, the PP controlled by the CPU is
The selected radar video data from the I display can be converted into a three-dimensional video display that also includes data in the elevation direction with the video as the central viewpoint position. As a result, a video display device is realized which has a wide range of video control and measures the control increase.

Embodiment 7 FIG. FIG. 7 is a block diagram showing a video display device according to another embodiment of the present invention.
The same reference numerals as those in FIG. 5 indicate the same or corresponding portions. In the figure,
Reference numeral 30 is a viewpoint visual field determination circuit in which one point of the selected video is the viewpoint position and the other is the visual field direction, and 703 is a CPU. In this embodiment, a viewpoint visual field determination circuit 30 is arranged instead of the tracking visual field selection circuit in FIG.

Next, the operation of the above video display device will be described with reference to FIG. In the figure, the polar coordinate conversion circuit 511, the multiplexer 521, the accumulator-equipped multipliers 551 and 552, and the radar video selection control system-equipped multiplexer 26 are operated in the fifth embodiment.
Since it is the same as, the description will be omitted.

The data output from the multiplexer 26 with the radar video selection control system for the two-dimensional PPI display processing is the drawing memory 1 together with the video data.
2 is input. On the other hand, the data converted into the three-dimensional video display by the multiplexer 26 with the radar video selection control system is sent from the viewpoint visual field determination circuit 30 which determines one point of the video as the visual point position and the other point as the visual field direction by the control signal from the CPU 3. Along with the output of
It is input to the three-dimensional video data detection circuit 28. In the 3D video data detection circuit 28, the 3D information data (Rng, Az, E) of the video is detected by the input data.
l) is detected. The processing after the detection is performed in the same manner as in the fifth and sixth embodiments, and thus the description thereof is omitted.

Through the above processing, the PP controlled by the CPU
The two types of radar video data selected from the I display can be converted into a three-dimensional video display in which data in the El direction in which one point of the video is the viewpoint position and the other is the visual field direction is added. As a result, a video display device is realized which has a wide range of video control and measures the control increase. The viewpoint and the visual field direction position determined by the viewpoint visual field determination circuit can be easily exchanged by the CPU control.

[0094]

According to the first aspect of the invention, it is represented by three-dimensional polar coordinates consisting of a range indicating the reach of a beam emitted from the antenna, an azimuth indicating the azimuth of the antenna, and an elevation indicating the elevation angle of the antenna. First conversion means for converting the first video showing the position of the target object into the second video represented by the Cartesian coordinates, and the second video output from the first conversion means are further used by the observer. Second conversion means for converting the origin of the coordinates onto the center line of the visual field centered on the viewpoint and rotating the coordinate axis to a specified angle in the three-dimensional space to convert the third video into the third video, and the first conversion means. The origin of the coordinates of the second video output from the converting means is moved to the center line of the visual field centered on the observer's viewpoint in the two-dimensional space consisting of the range and the azimuth in a predetermined elevation. And third conversion means for converting into a fourth video formed by rotating the coordinate axes at a specified angle in the two-dimensional space, and selection means for selecting either the three-dimensional video or the two-dimensional video. , This selection means is the above 3
And a display means for displaying the third video in three dimensions when the three-dimensional video is selected and for displaying the fourth video when the two-dimensional video is selected. The effect is that the video resolution can be improved.

According to the second aspect of the invention, the target represented by the three-dimensional polar coordinate system is composed of the range indicating the arrival distance of the beam emitted from the antenna, the azimuth indicating the azimuth of the antenna, and the elevation indicating the elevation angle of the antenna. Of the first video showing the position of the first video into a second video represented by Cartesian coordinates, and a second video output from the first video conversion means to further observer's viewpoint. Second conversion means for converting the origin of the coordinates on the center line of the visual field as the center and converting the coordinate axis to a specified angle in the three-dimensional space to convert the third video, and the first conversion means. The second video output from is moved to the origin of the coordinates on the center line of the visual field centered on the observer's viewpoint in the two-dimensional space consisting of the range and the elevation in the predetermined azimuth. Third converting the fourth video made by rotating the coordinate axes in the specified angle in 2-dimensional space
Converting means, selecting means for selecting either 3D video or 2D video, and when the selecting means selects the 3D video, the third video is displayed in 3D, and Since the display means for displaying the fourth video when the two-dimensional video is selected is provided, the video resolution in the azimuth direction received from the radar can be improved.

According to the third invention, an elevation selection means for selecting a plurality of elevations, and a two-dimensional representation consisting of a range and an azimuth in each elevation selected by the elevation selection means. Since the video resolution of No. 4 is displayed in a multi-window manner, the video resolution in the elevation direction received from the radar can be displayed more easily and the control force in the elevation direction can be improved.

According to the fourth aspect of the invention, a fifth video represented by a two-dimensional structure comprising an azimuth selecting means for selecting a plurality of azimuths and a range and an elevation in each azimuth selected by the azimuth selecting means. Is provided with a display unit for displaying a multi-window, the video resolution in the azimuth direction received from the radar can be displayed more easily and the control force in the azimuth direction can be improved.

According to the fifth aspect of the invention, the first position indicating the position of the target represented by the two-dimensional polar coordinates including the range indicating the arrival distance of the beam emitted from the antenna and the azimuth indicating the azimuth of the antenna. Of the second video output from the first converting means and a center of the visual field centered on the observer's viewpoint. Third conversion means for moving the origin of the coordinates on the line and converting the coordinate axis to a designated two-dimensional angle to convert the third video, and the third conversion means output from the second conversion means. The third conversion means for creating a fourth video represented in three dimensions based on the video and the elevation indicating the predetermined elevation angle of the antenna, and the fourth video output from the third conversion means. Furthermore, focusing on the observer's viewpoint Moving the origin of the coordinates on the center line of the field of view and rotating the coordinate axes to a designated three-dimensional angle to convert the fifth video into a fifth video, and a two-dimensional video or a three-dimensional video. When the selection means for selecting any one of them and the two-dimensional video is selected, the third video is displayed in two-dimensional, and when the three-dimensional video is selected, the fifth video is displayed in three-dimensional. Since the display means for displaying is provided, there is an effect that the video control can be widened and the control ability can be improved.

According to the sixth invention, the display means is 3
6. When the dimensional video is selected, the perspective display means is provided which displays the perspective by reducing the size of the surface vertical to the depth direction as the data in the depth direction increases. Video display device.

According to the seventh invention, the display means is 3
When a three-dimensional video is selected, the three-dimensional video is expanded / contracted according to the designated magnification, so that the video control can be widened and the control power can be improved.

According to the eighth invention, the display means periodically subtracts the storage means for storing the received video signal and the video signal stored in the storage means, and the subtracted result is displayed. Since the afterimage processing means for storing the new video signal in the storage means again and the afterimage display means for displaying the video signal stored in the storage means on the screen are provided, the afterimage processing can be freely performed. .

According to the ninth invention, the fourth converting means arranges the video selecting means for selecting one video and the video selected by the video selecting means at the origin of the coordinates of the three-dimensional space. Since it is provided with the control means for controlling so as to perform the three-dimensional tracking display, the video control can be widened, and the control power can be improved.

According to the tenth invention, the fourth conversion means displays the video on the screen when the video selection means for selecting one video and the video selected by the video selection means is set as the viewpoint position. Since the control means for controlling the antenna to be arranged at the origin of the coordinates in the three-dimensional space is provided, the video control can be made wider and the control force can be improved.

According to the eleventh aspect, the fourth converting means arranges the video selecting means for selecting two videos and the first video selected by the video selecting means at the viewpoint position, and In this case, the control means for controlling the second video to be placed at the origin of the coordinates in the three-dimensional space projected on the screen is provided, so that the video control can be made wider and the control power can be improved. There is an effect that can be achieved.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of a video display device according to an embodiment of the present invention.

FIG. 2 is a block diagram of a video display device according to another embodiment of the present invention.

FIG. 3 is a block diagram of a video display device according to another embodiment of the present invention.

FIG. 4 is a configuration diagram of a video display device according to another embodiment of the present invention.

FIG. 5 is a configuration diagram of a video display device according to another embodiment of the present invention.

FIG. 6 is a configuration diagram of a video display device according to another embodiment of the present invention.

FIG. 7 is a block diagram of a video display device according to another embodiment of the present invention.

FIG. 8 is a block diagram of a conventional video display device.

[Explanation of symbols]

1 polar coordinate conversion circuit, 2 multiplexer, 3 CP
U, 4 data files, 5 multiplier with accumulator, 6 divider, 7 multiplier, 8 FIFO memory, 9 line segment processing circuit, 10 raster display clock, 11 raster coordinate generator, 1
2 drawing memory, 13 bus, 14 trail circuit, 1
5 Output register & shift register, 16 D / A converter, 17 monitor, 18 control system, 19
El extraction circuit, 20 display conversion processing circuit with multiplexer, 21 Az extraction circuit, 22 El selection number management circuit, 23 El selection control system multiplexer, 24 Az selection number management circuit, 25 Az selection control system multiplexer, 26 multiplexer with radar video selection control system, 27 tracking visual field determination circuit, 28 three-dimensional video detection circuit, 29 viewpoint position determination circuit, 30 viewpoint visual field determination circuit, 103 CPU, 111 polar coordinate conversion circuit, 112
Polar coordinate conversion circuit, 121 multiplexer, 122
Multiplexer, 123 multiplexer, 124 multiplexer, 151 multiplier with accumulator, 152 multiplier with accumulator, 1
53 Multiplier with accumulator, 154 Multiplier with accumulator, 155 Multiplier with accumulator, 203 CPU, 303 C
PU, 403 CPU, 503 CPU, 511 polar coordinate conversion circuit, 512 polar coordinate conversion circuit, 513 polar coordinate conversion circuit, 521 multiplexer, 522 multiplexer, 523 multiplexer, 524 multiplexer, 525 multiplexer, 551 multiplier with accumulator, 552 multiplier with accumulator, 553 Multiplier with accumulator, 554 Multiplier with accumulator, 5
55 Multiplier with accumulator, 611 Polar coordinate conversion circuit, 621 Multiplexer, 651 Multiplier with accumulator, 652 Multiplier with accumulator, 711 Polar coordinate conversion circuit, 72
1 multiplexer, 751 multiplier with accumulator, 752 multiplier with accumulator.

Claims (11)

[Claims] 1. A first position indicating a position of a target represented by three-dimensional polar coordinates including a range indicating a reach distance of a beam emitted from an antenna, an azimuth indicating an azimuth of the antenna, and an elevation indicating an elevation angle of the antenna. Of the second video output from the first converting means and a center of the visual field centered on the observer's viewpoint. Second conversion means for converting the origin of the coordinates on the line and converting the coordinate axis to a designated angle in the three-dimensional space to convert the third video, and the second conversion means output from the first conversion means. In the 2D space consisting of the above range and azimuth in a given elevation, and moving the origin of the coordinates to the centerline of the field of view centered on the observer's viewpoint, in the 2D space. 3rd conversion means for converting into a 4th video formed by rotating the coordinate axis to a specified angle
Selecting means for selecting either a dimensional video or a two dimensional video, and when the selecting means selects the three dimensional video, the third video is displayed in a three dimensional and the two dimensional video is selected. Then, a video display device comprising a display means for displaying the fourth video. 2. A first position indicating a position of a target represented by three-dimensional polar coordinates including a range indicating a reach distance of a beam emitted from the antenna, an azimuth indicating an azimuth of the antenna, and an elevation indicating an elevation angle of the antenna. Of the second video output from the first converting means and a center of the visual field centered on the observer's viewpoint. Second conversion means for converting the origin of the coordinates on the line and converting the coordinate axis to a designated angle in the three-dimensional space to convert the third video, and the second conversion means output from the first conversion means. In the two-dimensional space consisting of the above range and elevation in a given azimuth, by moving the origin of the coordinates to the center line of the visual field centered on the observer's viewpoint and moving it in the two-dimensional space. 3rd conversion means for converting into a 4th video formed by rotating the coordinate axis to a specified angle
Selecting means for selecting either a dimensional video or a two dimensional video, and when the selecting means selects the three dimensional video, the third video is displayed in a three dimensional and the two dimensional video is selected. Then, a video display device comprising a display means for displaying the fourth video. 3. Elevation selection means for selecting a plurality of elevations, and a range in each elevation selected by the elevation selection means,
2. A video display device according to claim 1, further comprising display means for displaying a fourth video, which is represented by two dimensions and made of azimuth, in a multi-window manner. 4. An azimuth selecting means for selecting a plurality of azimuths, and a range and an elevation for each azimuth selected by the azimuth selecting means.
3. A video display device according to claim 2, further comprising display means for displaying a fifth video represented by a dimension in a multi-window manner. 5. A first video showing the position of a target, expressed in two-dimensional polar coordinates, consisting of a range indicating the reach of a beam emitted from the antenna and an azimuth indicating the azimuth of the antenna, expressed in Cartesian coordinates. The first conversion means for converting the second video output to the second video and the second video output from the first conversion means are further moved to the origin of the coordinates on the center line of the visual field centered on the observer's viewpoint. , A third conversion means for converting into a third video formed by rotating the coordinate axes at a designated two-dimensional angle, and a predetermined elevation angle of the third video and the antenna outputted from the second conversion means. Third conversion means for creating a fourth video represented in three dimensions based on the elevations shown, and the fourth video output from the third conversion means are further focused on the viewpoint of the observer. On the center line of the field of view Fourth conversion means for moving the origin and converting the coordinate axis to a designated three-dimensional angle to form a fifth video, and a selection for selecting either a two-dimensional video or a three-dimensional video Means and selecting the 2D video displays the 3D video in 2D, selecting the 3D video displays the 5th video.
A video display device, comprising: a display means for displaying in three dimensions. 6. The display means includes a perspective display means for displaying a perspective in which the size of a surface vertical to the depth direction is reduced as the data in the depth direction is larger when a three-dimensional video is selected. The video display device according to claim 1. 7. The video according to claim 1, wherein the display means is provided with an expansion / contraction means for expanding / contracting the three-dimensional video by a designated magnification when the three-dimensional video is selected. Display device 8. The display means periodically stores the video signal stored in the storage means and the storage means for storing the received video signal, and stores the subtracted result as a new video signal in the storage means. 2. An afterimage processing means for storing the image signal again in the screen, and an afterimage display means for displaying the video signal stored in the storage means on a screen.
~ The video display device according to claim 5. 9. The fourth conversion means includes video selection means for selecting one video, and control means for controlling the video selected by the video selection means to be arranged at the origin of the coordinates of the three-dimensional space. The video display device according to claim 5, further comprising: 10. The fourth converting means comprises a video selecting means for selecting one video, and a coordinate of the antenna in a three-dimensional space displayed on the screen when the video selected by the video selecting means is set as a viewpoint position. 6. The video display device according to claim 5, further comprising control means for controlling the video display device to be arranged at the origin of the video display device. 11. The fourth converting means arranges the video selecting means for selecting two videos and the first video selected by the video selecting means at the viewpoint position and, in this case, displays it on the screen. In the three-dimensional space
6. The video display device according to claim 5, further comprising: a control unit that controls the video of FIG.