JP2578965B2 - Graphic processing unit - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a graphic processing apparatus that includes a display and displays vector data and an original image obtained by a graphic recognition apparatus, superimposed on the display.

[Conventional technology]

 FIG. 6 shows an example of the prior art.

With the development of the graphic input system and the like, a technique of inputting a handwritten drawing from a scanner, analyzing the input by a graphic recognition device 12, and performing vectorization and character recognition on the input image data has been used. The output result of the graphic recognition device 12 is stored in a database such as CAD.

In a graphic processing system 61 such as CAD, the graphic recognition device 12
The original image data, vector data,
In order to recognize that the recognition data, which is the result of character recognition, is correctly created, a process of storing image data, vector data, and recognition data in a hierarchical manner and displaying the data in a superimposed manner on the display screen 62 is performed. Have been done.

The original image data is pattern data read by a scanner. It is converted to the data of The recognition data is obtained by converting character data into character codes by character recognition when the original drawing contains character information.

In the display screen 62 shown in FIG. 6, reference numeral 63 denotes the image data of the original drawing, and reference numeral 64 denotes the vector data obtained by vectorizing the image data by thinning processing or the like.

[Problems to be solved by the invention]

Conventionally, as shown in FIG. 6, in order to confirm whether various data created by the graphic recognition device 12 is correct,
Although image data itself and vector data are superimposed and displayed, there are the following problems.

(A) Since the amount of image data is large, the processing performance of the graphic processing system 61 and the like deteriorates.

(B) Conventional CAD systems usually have few functions for handling image data, and to incorporate such functions, large-scale modifications must be made to existing processing functions.

(C) Image data is compared with vector data.
Manipulation of data such as enlargement / reduction is extremely inconvenient, and conventional functions require various restrictions.

(D) As shown in FIG.
Since the display of the vector data 64 is thin and the display 64 of the vector data is thin, it is difficult to see the display simply by displaying the vector data 64 in a superimposed manner.

The present invention solves the above problems, and particularly, when displaying vector data and an original image superimposed,
The purpose of the present invention is not to directly use the image data but to express the outline by a point or a line vector, thereby making it easy to see and reducing the amount of data to be handled.

[Means for solving the problem]

 FIG. 1 shows a configuration example of the present invention.

In FIG. 1, reference numeral 10 denotes an original drawing such as a handwritten drawing, 11 denotes a scanner for scanning and inputting a drawing, 12 denotes a graphic recognition device for performing vectorization and character recognition on image data read by the scanner 11, and 13 denotes a magnetic disk. An external storage device such as a device, 14 is image data output from the graphic recognition device 12, 15 is vector data output from the graphic recognition device 12, 16 is recognition data of a character recognition result output from the graphic recognition device 12, 17 is a keyboard for inputting user instructions, 18
Is a processing unit including a CPU and a memory, etc., 19 is a recognition data processing unit that performs recognition processing on output data of the graphic recognition device 12, 20 is an image data conversion processing unit, 21 is an image data scanning unit, and 22 is a contour vector. 23, a CAD figure creating section for creating figures in the CAD system, 24, a display control section for controlling display on a display, and 25, a display.

On the screen of the display 25, 26 is a vector data display displaying the vector data 15 output from the graphic recognition device 12, and 27 is a contour vector data displaying data obtained by converting the image data 14 by the image data conversion processing unit 20. Indicates display.

The figure recognition device 12, the CAD figure creation unit 23, the display control unit 24, and the like may be the same as those in the related art. The recognition data processing unit 19
When performing processing for recognizing whether or not the vector data 15 has been correctly created, the image data conversion processing unit 20 is called, the image data 14 is passed, and processing for converting the image data 14 into contour vector data is requested.

The image data conversion processing unit 20 performs processing of tracking the outline of a figure in the image data 14 of the original figure 10 by the image data scanning unit 21 and the outline vector unit 22, and converting the outline into vector data of points or lines. It is. That is, the image data scanning unit 21 scans the image data 14 to generate a run-length vector, and the outline vector conversion unit 22 converts the outline portion of the figure into vector data of a point segment or a line vector connecting the points.

The contour vector data is notified to the CAD figure creating section 23, and is displayed via the display control section 24 so as to be superimposed on the vector data 15 output from the figure recognizing device 12.

As a result, the display 25 displays, for example, a vector data display 26 and a contour vector data display 27.

[Action]

In the present invention, the outline part of the figure is extracted from the image data 14 by the image data conversion processing unit 20 and is converted into point segment or line vector data. The vector data is compared with the original image data 14,
Since the data amount is small, the subsequent processing can be sped up as compared with the case where the image data 14 is directly handled.

Further, even when an existing CAD system such as the CAD figure creating unit 23 does not have a function of processing image data, a figure equivalent thereto can be processed as vector data.

Since the outline of the figure is represented by vector data, various data operations such as enlargement and reduction, rotation and inversion can be easily performed as needed.

Since the outline inside the contour vector data display 27 shown in FIG. 1 is outlined (background color), it is not difficult to see even if it is superimposed and displayed on the vector data display 26. Can be easily compared.

〔Example〕

2 is an explanatory diagram of image data conversion according to the embodiment of the present invention, FIG. 3 is an example of superimposed display according to the embodiment of the present invention, and FIG. 4 is a processing explanation of an image data conversion processing unit shown in FIG. 5 and 5 show examples of vector data used in the embodiment of the present invention.

The image data 14 output from the graphic recognition device 12 read by the scanner 11 is, for example, as shown in FIG.
This is data based on the pattern of 0/1. First, run-length vectorization is performed to vectorize the portion where the value of this pattern changes. The run-length vectorization is a process in which the image data 14 is decomposed in the horizontal direction, and the starting point and the ending point of the black pixel density are represented as coordinates.

In Fig. 2 (b), black pixels are represented by "O". As shown in this figure, scanning is performed in the horizontal direction, and the coordinates of the starting point and the ending point are set for each line or every several lines. Looking for In FIG. 2B, S1, S2,... Are the starting points, E1, E2,
... is the end point.

The start point and the end point obtained in this way are defined as point segments as indicated by “●” in FIG. 2 (c). If all of the outline points in the original drawing are point segments, the data amount increases, so it is preferable to convert the points into point segments every few lines in the horizontal direction.

Further, if necessary, as shown in FIG.
Points adjacent to the outline may be connected by a line vector, and the outline of the figure may be represented by line vector data.

FIG. 3 (a) shows an example in which the image data is represented by a point segment and is superimposed and displayed on the vector data display 26, as shown in FIG. 2 (c).

FIG. 3 (b) shows an example in which the image data is represented by a line vector and the contour vector data display 27 and the vector data display 26 are superimposed and displayed as shown in FIG. 2 (d). ing. As can be seen, since the image data is represented by the vector data of the outline, the display superimposed on the vector data display 26 is very easy to see.

Next, the processing outline of the image data conversion processing unit 20 shown in FIG. 1 will be described with reference to FIG.

FIG. 4 (a) shows the point segmentation processing of the image data shown in FIG. 2 (d). Note that a point segment may be considered as a type of vector data. In the point segmentation, the following processing is executed.

The image data is converted into the run-length vectors at the required line intervals by the processing described with reference to FIG.

Create data with the start point and end point as point segments.

FIG. 4 (b) shows a process of converting the image data shown in FIG. 2 (d) into a line vector. In this process, the following processes are executed.

-As in the case of point segmentation, the start and end points of the run-length vector are point segments.

Determine the starting point for vectorization. For example, let the upper left point be the starting point.

Find the next contour point. For example, it is checked whether or not there is a contour point in the lower line, and if not, a contour point is searched in the left and right direction of the same line. If not, a contour point is searched for the upper line. If the search is performed upward, the search is performed in the reverse order.

If a contour point is found, vector data connecting the previous contour point and the new contour point is created. In order to reduce the amount of vector data, as shown in FIG. 4 (c), it is preferable to perform integration processing with the previous vector data. That is, for example, in FIG.
Suppose that P1 and P2 have already been determined, and then the contour point P3 has been determined. At this time, if the distance d between the line connecting the contour points P1 and P3 and the contour point P2 is smaller than a certain threshold value, the contour point P2 is ignored and vector data V3 from P1 to P3 is created. Distance d
Is greater than or equal to a certain threshold, vector data V2 from P2 to P3 is created.

Now, it is determined whether the processed contour point is the same as the start point determined in the processing, and if it is the same, the processing ends.
If they are not the same, the process returns and the process is repeated in the same manner.

The vector data created by the processing shown in FIG. 4A or the processing shown in FIG.
Alternatively, it is a set of data as shown in FIG.

As shown in FIG. 5 (a), the data of the point segment is composed of the X coordinate and Y coordinate of the point and attribute information of the point such as the shape and color of the point. The line vector data is shown in Fig. 5 (b).
As shown in the figure, the X coordinate of the start point, the Y coordinate of the start point, and the X coordinate of the end point
The coordinates, the Y coordinates of the end point, and line attribute information such as the size of the line, the type and color of the solid line, the dotted line, and the like. Of course, not limited to such a data structure, it is possible to use various data structures according to the applied CAD system.

〔The invention's effect〕

As described above, according to the present invention, image data is converted to existing CAD data by using point segments or line vectors.
Because it can be handled as data suitable for the system,
This facilitates handling, reduces the amount of data, and enables easy-to-view superimposed display.

[Brief description of the drawings]

FIG. 1 is a configuration example of the present invention, FIG. 2 is an explanatory diagram of image data conversion according to an embodiment of the present invention, FIG. 3 is an example of superimposed display according to the embodiment of the present invention, and FIG. FIG. 5 is a diagram for explaining the processing of the image data conversion processing unit shown in FIG. 5, FIG. 5 shows an example of vector data used in the embodiment of the present invention, and FIG. In the figure, 10 is an original drawing, 11 is a scanner, 12 is a graphic recognition device, 13 is an external storage device, 14 is image data, 15 is vector data, 1
6 is recognition data, 17 is a keyboard, 18 is a processing device, 19 is a recognition data processing unit, 20 is an image data conversion processing unit, 21 is an image data scanning unit, 22 is a contour vector conversion unit, 23 is a CAD figure creation unit, Reference numeral 24 denotes a display control unit, 25 denotes a display, 26 denotes vector data display, and 27 denotes contour vector data display.

Claims (1)

(57) [Claims] 1. A graphic processing apparatus comprising a display for displaying a graphic and displaying the vector data obtained by the graphic recognition on the display, the image data of the original figure and the vector obtained from the graphic in the image data. Means for inputting data, image data conversion processing means for tracing the outline of a figure in the input original image data, and exchanging the outline for vector data of points or lines; input vector data; Means for superimposing vector data representing the outline of the figure obtained by the conversion processing means in the form of a point or a line and displaying the data on the display.