JPH03152674A - Image processor - Google Patents

Abstract

PURPOSE:To increase the screen updating speed by storing previously the data on a fixed image of an entire screen and drawing the fixed image just by reading out the image data stored in a range corresponding to a display range. CONSTITUTION:A CPU part 1 writes the image data on all fixed image whose display forms are invariable regardless of an operating state into a wide drawing memory 5. When a display area is designated, the part 1 defines a reading range for the image data corresponding to the display area among the image data on an entire plant view written in the memory 5. Then the part 1 stores a graphic display instruction of a variable image including the coordinate information showing the drawing position and the graphic information into a segment memory 2. When a display area is designated, a designated graphic instruction is read out and the data on the variable image obtained by a display instruction is written in the memory 5. Then the image on the pointed display area is displayed on a CRT 4 and a screen is updated.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an image processing device used, for example, as a monitor for a computer system that monitors and controls the operating status of various plants.

[Conventional technology]

In plant control systems for industrial plants, power generation plants, etc., the operating status of the plant is displayed on a graphic CRT, and operators are increasingly controlling the plant while monitoring the operating status of the plant displayed on the screen. ing.

In this way, control systems that rely on screen displays to control plant operating conditions are able to immediately follow changes in operating conditions so that operators can immediately take appropriate measures, especially when an abnormality occurs in the plant. The image processing device is required to have a fast reaction time to update the screen.

In addition, in systems that control plants where a large number of facilities are installed over a wide area, it is impossible to display the entire plant area on the monitor screen at once, so the screen must be moved continuously to control the display area. A scrolling function is required to move sequentially. Figure '3 is an example of a screen display of a block diagram of a plant system. Plant system diagrams generally have a display format regardless of the operating status of the plant. It consists of a fixed picture a consisting of fixed figures that do not change, and a variable picture consisting of variable figures showing state quantities such as the amount of water in a valve that can change over time depending on the operating state of the plant.In addition, the dotted line in the figure The range indicated by is the display area 41.

FIG. 4 is a block diagram showing the main structure of a conventional image processing apparatus disclosed in Japanese Patent Application Laid-open No. 124085/1985.

Reference numeral 1 in the figure is a CPU unit, which controls the screen display of the plant system diagram. The CPU section 1 stores in the segment memory 2 a graphic display command consisting of coordinate information indicating a drawing position and graphic information, such as "Draw a line segment connecting two points rPl and P2."

The drawing memory 3 is a bitmap memory and consists of a first drawing memory 31 and a second drawing memory 32, and while one is being scanned to display an image on the CRT 4, data is written to the other. After one scan is completed and the other data write is completed, the scan is shifted to the other one.

Next, the procedure for moving the display area by scrolling will be explained. FIG. 5 shows a flowchart of the procedure and the execution results in association with each other.

The CPU unit 1 stores graphic display commands for fixed images and variable images consisting of coordinate information indicating the drawing position and graphic information in the segment memory 2. For example, the display area is set to (0, O).
If you specify ~(80,80), segment memory 2
, the graphic display command r (50, 50) whose coordinate information belongs to the specified display area, the circle J with a radius of 30 centered on K, and the number (!draw X on r (20, 30)). A command is determined. The determined graphic display command is drawn, for example, in the first drawing memory 31, and the first drawing memory 31 is scanned to draw a "circle" and a "numeric value X" on the CRT 4.

If you scroll the screen after displaying these, the CP
The U unit 1 detects the coordinates of the display area according to the amount of scrolling, again calculates the graphic display command to which the coordinate information belongs to the display area in the segment memory 2, draws it in the second drawing memory 32, and The drawing memory 32 is scanned, an image is drawn on the CRT 4, and the screen is updated.

[Problem to be solved by the invention]

Conventional image processing devices are configured as described above, so when the screen display is updated due to a scroll request or a change in the state quantity of the monitored object, it is determined whether the coordinate information belongs to the display area or not on the fixed screen. Not only must judgments be made for all graphic display commands for the variable and variable images, but also the fixed images and variable images that correspond to the display must be redrawn, which poses a problem in that it takes a long time to update the screen.

The present invention has been made to solve these problems, and involves storing fixed image data of the entire image in advance, and reading out the stored image data in a range corresponding to the display range. It is an object of the present invention to provide an image processing device that can update the screen at a high speed by having a configuration that can draw a fixed image only by using the following methods.

[Means to solve the problem]

The image processing device of the present invention includes a memory that creates and stores in advance image data of a fixed figure of the entire image exceeding a physically displayable range from the figure data, and a memory that stores the image data of the fixed figure from the memory based on the display range. means for limiting the range from which data is read; means for creating image data of a variable figure belonging to the display range; and displaying an image based on the image data of the fixed figure read from the limited range and the image data of the created variable figure. The invention is characterized by comprising a means for doing so.

[1 Effect] Based on the display range, the image processing device of the present invention limits the memory range from which image data of a fixed figure to be displayed is read using coordinate information, etc., and creates image data of a variable figure belonging to the display range. , an image in which a variable image and a fixed image are mixed is displayed based on the image data of the fixed figure read out from the limited range and the image data of the created variable figure.

〔Example〕

Hereinafter, the present invention will be explained based on drawings showing embodiments thereof.

FIG. 1 is a block diagram showing an example of the configuration of an image processing apparatus according to the present invention. Reference numeral 1 in the figure is a CPU unit, which controls the screen display of the plant system diagram. The segment memory 2 stores a variable image graphic display command consisting of coordinate information indicating a drawing position and graphic information, and the CRT 4 displays an image in a designated area.

The wide drawing memory 5 is a bitmap memory capable of writing image data of a fixed image constituting an image of the entire plant, that is, having a capacity capable of drawing an image.

Next, the procedure for moving the display area by scrolling will be explained. FIG. 2 shows a flowchart of the procedure and the execution results in association with each other.

When the CPU section 1 displays the initial screen, it writes all fixed image data whose display form remains unchanged regardless of the operating state into the wide drawing memory 5 (when the display area is (50
0,,500) to (1000,1000), the CPU section 1 selects the readout range 51a of the image data corresponding to the display area among the image data of the overall plant diagram written in the wide drawing memory 5. limit.

When the CPU section 1 displays the initial screen, the CPU section 1 stores in the segment memory 2 a graphic display command for a variable image consisting of coordinate information indicating a drawing position and graphic information. As described above, when a display area is designated by a scroll request or a change in a state quantity, a graphic display command such as "draw a numerical value Y at r (700, 700) belonging to the display area whose coordinate information is designated" is determined. The image data of the variable image based on the determined graphic display command is written to the wide drawing memory 5, and the image in the designated display area 51a is CR
Display on T4 and update the screen.

In this embodiment, an image consisting of a fixed image and a variable image has been described, but the present invention is not limited to this, and the same effect can be obtained even in the case of an image consisting of only a fixed image.

[Effects of the Invention] The image processing device of the present invention creates and stores in advance image data of a fixed figure of the entire image exceeding the displayable range from the figure data, and stores the image data of the fixed figure according to the specified display range. By limiting the range from which the image data is read, it is possible to display fixed figures in the required range simply by reading the image data.
Since it is not necessary to form image data from the graphic data of a fixed figure each time the display range is changed, an excellent effect is achieved in that the image update speed is fast.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing the configuration of the image processing apparatus of the present invention, FIG. 2 is a block diagram showing the flow structure of the screen scrolling procedure, and FIG. 5 is a flow chart explaining the conventional display procedure. 1...CPtJ section 2...Segment memory 4...
・CRT 5...Wide drawing memory Note that in the figures, the same reference numerals indicate the same or equivalent parts.

Claims (1)

[Claims] (1) For images that include a mixture of variable figures that can change over time and fixed figures whose shapes do not change, create image data from data related to each figure, display part or all of it, and change the display range. In an image processing device that is capable of A means for creating image data from graphic data of a variable figure belonging to the range, and a means for displaying an image based on the image data of the fixed figure read out from the limited range and the image data of the created variable figure. Characteristic image processing device.