JPH08211825A - Rainfall visibility simulation device - Google Patents

Abstract

PURPOSE: To enable an light point displayed in the electronic beam light emitting time of a random scanning system to perform the simulation of 'blurring' by making a light emitting state change at the time of the ON/OFF changeover of a wiper from a computer when a weather condition is a rainfall. CONSTITUTION: A value imparted by a light system control part 16 controlling the focus value of the electronic beam of a display device 16 so as to be changed according to the distance from the point of view from the ON/OFF changeover of the wiper from the keyboard of an operation part 17 via a computer 3 and a data memory 2 (in such a manner that the size of the focus is made large by making the focus value large when the point of view is near and the size of the focus is made small by making the focus value small when it is far) is made the maximum value. Consequently, when the focus value is made to be the maximum value at the time the wiper is ON, the light point is made to be 'out of focus' and then an 'blurring' effect is obtained.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a field-of-view generation device for simulating a light emission state of a light point in a rainy state used for a vehicle driving simulator or the like.

[0002]

2. Description of the Related Art In a conventional computer image generating device, when a weather condition simulates rainfall,
The image change due to ON / OFF of the wiper was simulated depending on the number of pixels forming the light point.

FIG. 2 is a block diagram of a computer image generating apparatus showing an example of a conventional system.

As a known technique close to this conventional configuration example, for example, "a visual system for flight simulator" (Shibuya, Amemiya et al .: Technical Report of Television Society, ITEJ Technical Report).
Vol. 14, No. 73, pp. 27-32, Dec
1990).

In FIG. 2, a computer 3 stores roads stored in the external memory 1 by taking in parameters necessary for image data such as the position of the body (X, Y, Z on the map data) and the attitude data of the body. Then, the corresponding database is transferred to the data memory 2 from the topographical data such as the shapes and positions of the mountains and the buildings, and the positions of the lights such as street lights.

The computer image generator takes in the plane system data described in the earth coordinate system from the data memory 2 into the plane system visual field coordinate conversion unit 5, and uses the attitude data to determine the position of the pilot's eyes. After conversion to the visual field coordinate system as the origin, the plane system screen coordinate conversion unit 6 converts the three-dimensional coordinates represented by the visual field coordinate system obtained by the plane system visual field coordinate conversion unit 5 into 20 raster CRT or projector display devices. Convert to a two-dimensional screen coordinate system for display. 7 performs processing for connecting the start point and the end point of the two-dimensional coordinates obtained from the plane-system visual field coordinate conversion unit 5, and further, in order to consider the overlap of the planes, the data sent at random is from the front side. A line drawing creating unit performs a process of sequentially finding and rearranging, and an image creating unit 8 which converts the video data based on the color data of the color information R, G, and B added to the planar data processed by the line drawing creating unit, Similarly to the plane system, 9 is a field of view in which the light point system data described in the earth coordinate system in the external memory 1 is fetched from the data memory 2 and the position of the pilot's eyes is used as the origin by using the attitude data. Similarly to the plane system screen coordinate conversion unit 6, 10 converts the three-dimensional coordinates represented by the visual field coordinate system obtained in the previous stage into the screen coordinate system for displaying on the display device 20. 11 is a size control unit that controls the size of the light point in pixel units according to the distance from the viewpoint to the light point, and 12 controls the brightness of the light point according to the distance from the viewpoint to the light point. The brightness control unit 4, which is present, generates texture data for applying a pattern to the planar image data so that the image data looks like it. Reference numeral 18 is a frame memory that temporarily stores all the light points of one frame in order to rearrange the light points obtained in random order up to the write system brightness control unit 12 in the order of the scanning lines, and 19 is an analog synchronized with R, G and B. The video signal generator 20 is a display device such as a raster scan type CRT or a projector for displaying a landscape.

[0007]

In the above-mentioned conventional technique, when the wiper ON / OFF is switched in the rainy state,
Since the display device is of the raster scan type, the simulation is performed by changing the display pixel of the light point. Since the "light point bleeding" was simulated using pixels, it lacked reality.

Therefore, it is an object of the present invention to perform a "blurring" simulation on a light point displayed in an electron beam emission time of a random scan system in a simulation view device.

[0009]

In order to achieve the above-mentioned object, the present invention provides a computer image generating apparatus for displaying a combination of light points displayed by a random scan method and plane data displayed by a raster scan,
A plane generation control unit that generates an image of the surface configured by the raster scan method, a texture generation unit that generates texture data for applying a pattern to the image data of the surface, and a light point that indicates the issue point by the random scan method. The light point part is provided with a function of changing the light emission state when the wiper is turned on / off from the operation part of the computer when the weather condition is raining.

[0010]

According to the present invention, with the above-described configuration, a plane forming a simulation image is created through the plane system coordinate transformation unit, the plane system perspective transformation unit, and the line drawing creation unit.

The texture generating section generates texture data for applying a pattern to the image data of the surfaces so that each surface looks like them. As a result, the simulation image plane is given a pattern and becomes more realistic. Through the light-based coordinate conversion and the light-based perspective conversion, the light of the streetscape displayed by the random scan method and the light point indicating the light emitting point on the runway are generated. When the wiper is turned off, a means for obtaining a "bleeding" image at the light point displayed by the electron beam emission time of the random scan system is provided.

[0012]

Embodiment FIG. 1 is a block diagram of an embodiment of a simulation view generator.

The processing procedure of this embodiment is as follows.

The computer 3, the texture generation unit 4, the plane system perspective conversion unit 5, and the line drawing creation unit 7 have the above-described processing in the section of the prior art. Light system coordinate conversion 9, light system screen coordinate conversion unit 10, light point size control 11,
When the brightness control 12 or the like is performed, the data is immediately supplied to the blocking circuit 13. The blocking circuit 13 has a function of dividing the light point data into blocks by a group in which the light point displays are close to each other by the display x and y coordinates, storing them in the buffer memory, and reading them in the order of adjacent blocks at the time of reading. ing. The output of the blocking circuit 13 is supplied to the light point movement control device 14, and the time until the electron beam of the display device 16 is stabilized and the deflection voltage for driving the electron beam is calculated and the time is measured. After that, the light emission timing and the time width of the light point are controlled.

After that, the light point data and the plane data are supplied to the display device 16 through the multiplexer 15 in a time division manner according to the timing.

This operation will be described in detail below. Turn on the wiper from the keyboard (not shown) of the operating unit 17
From the OFF switching operation, the aperture value (focus) value of the electron beam of the display device 16 is controlled to change according to the distance from the viewpoint via the computer 3 and the data memory 2 (when the distance is near, the focus value is changed. The value given by the write system size control unit 11 is set to the maximum value by increasing the size to increase the size and decreasing the size in the distance. In this way, when the focus value is maximized when the wiper is ON, the light point has the effect of "blurring" and "blurring", resulting in the screen shown in FIG. In the figure, 21 is the light point displayed in this way.

[0017]

According to the present invention, in the simulation visual field device, it is possible to perform the simulation of the "blurring" of the light point when the wiper is turned on / off in the rainfall state by the display device random scan method.

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment of the present invention.

FIG. 2 is a block diagram showing a conventional method.

FIG. 3 is a diagram showing a simulation screen.

[Explanation of symbols]

1 external memory, 2 data memory, 3 computer, 4
Texture generation unit, 5 plane system coordinate transformation unit, 6 plane system perspective transformation unit, 7 line drawing creation unit, 8 image creation unit, 9 light system coordinate transformation unit, 10 light system perspective transformation unit, 11 light point size control, 12 Bright point brightness control, 13 block circuit, 14 light point movement control device, 15 multiplexer, 16 display device (raster scan / random scan time division system CRT
Or project, 17 operation unit, 18 frame memory,
19 analog video signal generator, 20 display device (raster scan CRT or projector)

Claims (1)

[Claims] 1. A computer image in which data generated by a computer based on an image database is combined with a random scan display method and a raster scan display method and sequentially displayed on a display device, and a light point indicating a light emitting point by the random scan method is displayed. When the weather condition is raining in the generated light point control unit, the simulated visibility device is characterized in that the light emitting state is changed according to the wiper ON / OFF switching from the operation unit of the computer.