JPH0218755B2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention allows a computer to read drawings,
This relates to a drawing reading method that can be memorized.

(Prior Art) Although text is generally stored in a computer, drawings are rarely read and stored mechanically. Although research is being conducted to mechanically read figures, such as pattern recognition, nothing has yet appeared that can read drawings as they are.

Therefore, in order to store a conventional drawing in a computer, it is necessary to supply data such as the shape, dimensions, and correlation with other lines of the figure lines.
As the drawings become larger, the amount of data becomes enormous, and it has been virtually impossible to supply this enormous amount of data.

(Problems to be Solved by the Invention) The present invention has been made in consideration of the above points, and an object of the present invention is to provide a drawing reading method for mechanically reading drawings.

(Means for Solving the Problem) In order to achieve the above object, the present invention arranges a large number of photosensitive elements in a straight line, and arranges the first and second sensors, which are small compared to the size of the drawing, at a predetermined position. Sensors crossed at an angle are moved in a fixed direction relative to the drawing, and when running on a line drawn on the drawing, both the first and second sensors detect the line, and a large number of light sensors on each straight line detect the line. An output is output from the center of the element, the outputs of both sensors are superimposed and recorded in a computer along with position information, and then the sensor is moved by a length corresponding to the width of the sensor in the direction perpendicular to the direction of movement of the sensor. The ends are partially overlapped and shifted and moved in the same direction as above, and during the movement, the output of the sensor is stored along with the position information as before, and the sensor is similarly shifted and detected and stored in the computer. It is characterized by going.

(Example) In this example, a sensor is scanned while moving in a fixed direction over a drawing, and the drawing is read by a photosensitive element (to be described later) provided in a portion facing the drawing, and the drawing is stored in a computer. It is.

In FIGS. 1 and 2, the sensor 1 is formed by making a first sensor 2 and a second sensor 3 orthogonal to each other. Both the first and second sensors 2 and 3 have the same structure, and a plurality of photosensitive elements 4, 4, . There is. These photosensitive elements 4, 4, . . . are arranged in large numbers so that 10 to 12 elements can fit within the thickness of the line on the drawing, which is usually about 0.5 mm. In this embodiment, 2048 elements 4, 4, . . . are arranged within a length of 3 cm.

FIG. 3 shows sensors of another embodiment device, and as shown, a first sensor 5 and a second sensor 6.
are crossed at right angles to each other at each end. As described above, the photosensitive elements 4, 4, . . . are provided on the back surface.

As shown in FIG. 4, these sensors 1 are sequentially scanned while moving in a fixed direction on the drawing 7. The same effect can be obtained even if the sensor 1 is fixed and the drawing 7 is moved. Each element 4 is electrically connected so that it outputs "1" when the drawing is white and "0" when it is black. The output of the central element (detection section) and the position of the sensor 1 are inputted. The output from the element is taken out from both the first and second sensors 2 and 3.

For example, as shown in FIG. 5, when the element of the second sensor passes over line 8, the element in 4a constitutes the detection section, and only the output of element 4b located in the center of line 8 is output. , along with its location information, is input into the computer. The position information may be input by the amount of movement of the sensor when the sensor is moved in a certain direction, the amount of movement of the paper when the paper is moved, or other means.

The following will explain how a computer can correctly recognize a graphic image drawn on a drawing by scanning with the sensor 1. It will be easily understood that a pattern of vertical and horizontal straight lines can be obtained for both the first and second sensors. Next, we will describe patterns obtained by this embodiment that are necessary for correctly identifying graphic lines such as curves and intersections between lines and storing them in a computer.

Figure 6 shows the pattern of a typical part, and Figure 7 shows the pattern of a typical part.
The figure shows a pattern for a circle. FIG. 6A is the pattern obtained by the first sensor;
Figure B is the pattern obtained by the second sensor. Further, FIG. 6C is a pattern diagram that is a superimposition of FIGS. 6A and B, that is, a pattern diagram input to a computer, and the thick straight lines in the diagram are the parts that appear in common in both. In the figure, the pattern obtained by the first sensor 2 is shown by a black circle, and the pattern obtained by the second sensor 3 is shown by a white circle.

In this way, a very distinctive pattern can be obtained depending on each part. If this characteristic pattern is stored in the computer in advance, the drawing can be reproduced by comparing it with the pattern obtained by scanning the sensor 1.

By the way, the figures drawn on the drawing by sensor 1 are input into the computer and stored, but as mentioned above, the sensor is extremely small at 3 cm compared to the drawing, so the drawing is reduced to the width of the sensor. It is necessary to divide the drawing, input the divided parts (hereinafter referred to as lanes) into a computer while scanning each lane from one end of the drawing to the other, and synthesize the data. Therefore, new problems arise. In other words, a computer is a digital computing machine, and unlike humans, it is not possible to connect them appropriately, but drawings can expand and contract, causing distortion of figure lines, reading errors, and position detection variations. Therefore, lines that should be connected may become disconnected due to a single signal difference.

The present invention has been made taking these points into consideration, and is designed to prevent differences in line quality from occurring when reading the same line.

Therefore, the present invention is characterized in that when moving the sensor 1 or FIG. 7 from one lane to the next, the ends of the sensor 1 are partially overlapped.

For example, if a drawing is to be read as shown in FIG. 8, three lanes, lane A, lane B, and lane C, must be used to read the drawing. At that time, as shown in the example of lane B in Figure 9,
The parts indicated by RP at both ends are overlapped and moved.

In this way, by overlapping a part of the data and reading it, it is possible to detect how the lines of the lane being read are related to the adjacent lanes, thereby reconfiguring the data connections between the lanes. It can sometimes be used effectively. Therefore, errors in the direction can also be corrected, and line discrepancies will not occur when reading the same line.

As explained in detail above, according to the present invention,
Both the first and second sensors have a configuration in which a large number of photosensitive elements are arranged in a straight line, the output is taken from the center of the plurality of photosensitive elements detected, and the outputs of both are superimposed and stored in the computer. Therefore, the output will be a characteristic pattern depending on the type of line, such as straight line, curved line, intersecting line, or end point of the line, and this characteristic will be stored together with the position information, so when retrieving the stored information, it will be necessary to know in advance. The drawing can be reproduced by comparing the features of the pattern shown.

Moreover, as mentioned above, each sensor is configured to detect multiple photosensitive elements arranged in series, and output from the one in the center of the detected elements, so the thickness of the line is irrelevant, and any drawing drawn can be memorized. In other words, it becomes possible to easily have a computer read the drawings.

Furthermore, even when a drawing is read in sections, the ends of the sensors are read while partially overlapping, so there is no possibility of misalignment of lines.

[Brief explanation of drawings]

Fig. 1 is a perspective view of a sensor according to an embodiment of the present invention, Fig. 2 is an enlarged plan view of the back side of the sensor, Fig. 3 is a perspective view of a sensor according to another embodiment, and Fig. 4 is a diagram showing the sensor in the drawing. FIG. 5 is a plan view showing the relationship between the drawn line and the photosensitive element, and FIGS. 6 and 7 are based on the shape of the line when scanned by the sensor of this embodiment. In the plan views showing the differences in patterns, A shows the pattern obtained by the first sensor, B shows the pattern obtained by the second sensor, and C shows the pattern obtained by both the sensors A and B. FIG. 8 is a plan view of the drawing to be read, and FIG. 9 is a plan view showing only a portion thereof. DESCRIPTION OF SYMBOLS 1...Sensor, 2...First sensor, 3...Second sensor, 4...Photosensitive element, 7...Drawing, 8...Line.

Claims (1)

[Scope of Claims] 1. A sensor in which a large number of photosensitive elements are arranged in a straight line and the first and second sensors, which are small compared to the size of the drawing, intersect at a predetermined angle is arranged relative to the drawing. The first and second sensors both detect the line while moving in a certain direction on the drawing and output an output from the central one of the many photosensitive elements on each straight line. The outputs of the sensors are superimposed and recorded in a computer along with the position information, and then the ends of the sensors are partially overlapped and shifted by a length corresponding to the width of the sensor in the direction perpendicular to the direction of movement of the sensor. A method for reading a drawing characterized in that the output of the sensor is stored along with the position information in the same manner as described above during the movement, and thereafter the output of the sensor is similarly shifted and detected and stored in a computer. 2. The drawing reading method according to claim 1, wherein the angle of the sensor is a right angle.