JP3255702B2 - How to display measurement results on a 2D measuring machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of displaying a measurement result in an image processing type two-dimensional measuring machine.

[0002]

2. Description of the Related Art As a two-dimensional measuring device, a two-dimensional measuring object such as a printed circuit board is illuminated with light, and an outline (hereinafter, referred to as an edge) of the measuring object is defined by a difference in brightness of light. The object to be measured is imaged by a CCD camera supported so as to be relatively movable in the two-dimensional direction with respect to the object to be measured, the image is processed, and the image is reproduced and displayed on a monitor device on two-dimensional coordinates. An image processing method is known in which a coordinate pointing device (hereinafter, referred to as a mouse) for specifying and indicating the point (1) is used to calculate and measure the shape and dimensions of a measurement target from a reproduced image on a monitor device.

In this type of two-dimensional measuring machine, the measurement result is generally displayed by printing with a printer, and the measurement result is displayed by, for example, using a circle or a circle. Characters such as "square" and "rectangle" are used, and thereafter, various measured values such as center coordinate values and diameters are printed. However, such a display method has disadvantages described below.

[0004]

That is, in the conventional display method, the object to be measured is represented by characters. However, depending on the object to be measured, a large number of circles and squares are mixed, and all of them are displayed. When represented by characters, the object to be measured cannot be recognized unless the characters are read, and there is a disadvantage that it takes a long time for recognition.

The present invention has been made in view of such conventional problems, and an object of the present invention is to provide a method of displaying a measurement result in a two-dimensional measuring machine that allows a measurement target to be recognized at a glance. Is to provide.

[0006]

According to a first aspect of the present invention, there is provided a method of displaying a measurement result in an image processing type two-dimensional measuring machine, wherein the measurement result is reproduced and displayed on a monitor device. Form a number of radial segments from one point inside the object to the outside, and place them on each radial segment.
The coordinate value of each edge of the object to be measured
From the coordinate values of the contacting first and second edge portions,
Find the equation of a straight line passing through the edge, and add
The coordinate value of the adjacent third edge portion satisfies the straight line equation.
The coordinate value of the third edge portion is determined
When the straight line equation is not satisfied,
Storing the third edge portion and the third edge portion
Find the equation of a new straight line passing through the fourth edge adjacent to
Therefore, the coordinate value of the third edge portion satisfies the equation of the straight line.
A fourth edge adjacent to the third edge portion
It is determined whether the portion satisfies the straight line, and a fourth edge portion and the fourth edge portion are determined.
Regarding the fifth edge portion adjacent to the fourth edge portion, the fifth edge portion
As with the processing performed for the third edge part and the fourth edge part,
After processing and finding the new straight line equation,
The fifth edge adjacent to the fourth edge is the new straight line.
It is determined whether or not the following equation is satisfied.
In the same manner as the processing performed for the third edge portion,
The same processing is performed for the next adjacent edge part.
The process is repeated until the process returns to the first edge portion.
Find an equation, and find the equation of several straight lines
The shape of the measurement object is estimated from the measurement result, and the shape symbol of the measurement object is printed on a printer or displayed on the monitor device together with the measurement result. According to a second aspect of the present invention, in the first aspect, the shape symbol of the measurement object is estimated by a central control device from various shape symbols stored in advance in an image memory. It is characterized by the following.

[0007]

According to the above-described method for displaying the measurement result, the shape symbol of the object to be measured is printed or displayed on the monitor together with the measurement result.
It is easy to recognize what was measured.

[0008]

Preferred embodiments of the present invention will be described below in detail with reference to the accompanying drawings. 1 to 4 show one embodiment of a method of displaying a measurement result in the two-dimensional measuring device according to the present invention. The two-dimensional measuring device shown in FIG. 1 is a CCD that captures an object to be measured and outputs the image as an electric image signal.
A camera 10, an image memory 12 for storing image signals of the CCD camera 10, a monitor device 14 including a CRT for reproducing and displaying a measurement object on a two-dimensional coordinate axis (x, y), and a monitor device 14 A mouse 16 for specifying and indicating an arbitrary point on the upper side, and a printer 1 for printing and outputting measured values
8, a central control device (CPU) 20, and a memory 22 for storing a control procedure of the control device 20.

In this embodiment, the CCD camera 10 is mounted on a moving table that moves in a two-dimensional direction, and the position of the camera 10 in a coordinate system set on the moving table is determined by linearly moving the moving amount of the moving table. Detected by the scale 24, the detected value is constantly measured by counting with an XY counter 26, and the measured value is input to the central control device 20.
The CCD camera 10 is directly fixed to the main frame of the two-dimensional measuring machine, and the object to be measured can be moved two-dimensionally on a moving table (called an XY table in a structure where the CCD camera is directly fixed to the main frame of the measuring machine). Alternatively, the moving amount may be detected by the linear scale 24, and the detected value may be constantly measured by counting the detected value with an XY counter.

The objects to be measured are, for example, precision sheet metal parts, printed wiring boards,
It is an almost planar object such as an original artwork, and creates a light-dark difference between the object to be measured and the background by projecting an illumination light beam from the back or front side. Is defined. The mouse 16
It has a pair of rotary length measuring sensors provided corresponding to the coordinate axes x and y of the monitor device 14 and a click switch. By operating the click switch, the position of the monitor device 14 on the coordinate axes x and y is increased. Any point is specified.

The centralized control device 20 performs predetermined image processing on the image signal stored in the image memory 12 and outputs the processed image signal to the monitor device 14. Further, the central control device 20 detects an edge portion of the measurement target based on the point specified by the mouse 16, calculates an edge coordinate value on the monitor device 14, and based on the edge coordinate value. To estimate the shape of the measurement object.

[0012]

[0013]

[0014]

[0015]

[0016]

According to FIGS. 2 and 3, the object to be measured is square.
In the case of A ′, the control procedure performed by the central control device 20 is
explain. When the control procedure of the central control device 20 starts, first, in step S10, as shown in FIG.
An arbitrary point B in the object A ′ is specified by the mouse 16.

When the instruction of the point B is performed, the subsequent step S
At 11, as shown in FIG. 3B, a number of radial line segments C are formed from the point B to the outside of the object A, and a step S
At 12, an edge portion is detected based on the relationship between the radial line segment C and the object A '. The detection of the edge portion is performed by determining the brightness of the image signal of the monitor device 14 corresponding to the coordinates of the radial line segment C, and the image signal is inverted from dark to bright to correspond to each radial line segment C. Edge portions c1 to cn are sequentially detected.

When the edge portions c _{1 to} cn are detected, their coordinate values on the x and y axes are specified. From these coordinate values, in step S ₁₃ , the edge portions c adjacent in the circumferential direction are determined.
Two points are selected from _{1 to} cn, and an equation of a straight line passing through the selected two points is calculated. In other words, for example,
When the edge portion c ₁ of the same c ₂ is selected as two points, it is determined equation of a straight line passing through the two points, which are f _1. Then, 1 is added to the larger one of the suffixes of the edge portion c (c _{2 in} this example), c ₃ is set to cmax, and the next step is executed.

[0020] In step S _14, the coordinate value of the edge portion cmax is determined whether they match the equation f ₁ of the straight line is, if they match, adds 1 to cmax in step S ₁₅ This is set as a new cmax. Subsequently, in step S _16, by comparing the updated cmax and cn + 1 and, whether or not processing of all the edge portions is completed is judged, if not completed, step S ₁₄
And the same processing is continued.

Meanwhile, in step S _14, the edge portion cmax
When the coordinate value is determined not to match the equation f ₁ of the straight line, the step S ₁₇ is executed. In step S _17, stores the equations f ₁ of a straight line in the memory 22, the equation of a straight line passing through two points operation with the edge portion cmax + 1 adjacent thereto and the edge portion cmax, which was a f _2, a cmax + 2 As a new cmax, step S
Return to ₁₄ .

[0022] In step S _14, the coordinate value of the edge portion cmax is determined whether they match the equation f ₂ straight lines, if they match, adds 1 to cmax in step S ₁₅ This was a new cmax, subsequent step S _16, by comparing the updated cmax and cn + 1 and, whether or not processing of all the edge portions is completed is judged, if not completed , the process returns to step S _14, the same processing is continued, which does not coincide with the equations of step S ₁₄ linear, the equation of the new straight line is created every time the step S ₁₇ is executed.

Then, the above processing proceeds, and step S
_If it is determined in step ₁₆ that the processing of all the edge parts has been completed,
(Measuring object in this example the expression of 4 or 5 for a square) more equations fn straight lines obtained in step S _18, whether there is a match with a plurality of expression determined It is, if there is a match, which was deleted in step S ₁₉ proceeds to the next processing.

[0024] In step S _20, by extending the equation fn of a plurality of straight lines obtained, the shape of the object A '(squares) is estimated. In step S _21, obtains the square vertex coordinates of the length and short length of the long side of the rectangle from the coordinate values are computed center coordinates, respectively, and outputs the result to the printer 18 in step S ₂₂ And the procedure ends. Note the measuring object in step S ₂₁ is assumed to be square, the estimated shape symbols from various shapes symbols previously stored in the image memory 12 at step S ₂₂ (squares) is selected Then, the shape symbol is printed by the printer 18 together with the measurement data.

FIG . 4 shows a measurement result printed by the printer 18. In the measurement results shown in the figure, first, the measurement number is shown on the first line, and the shape symbol of the measurement object A '(in this example, the measurement object is a square, Is printed).
In the second and third lines, the center coordinate value of the rectangle is shown as x and y coordinate values. The fourth line shows the length of the long side of the rectangle, and the fifth line shows the length of the short side of the rectangle. Thus, the shape symbol of the measurement object A 'is
When printed on the printer 18 together with the result,
Easy to see what you measured
Will be recognized.

[0026]

As described above in detail in the embodiments,
According to the method of displaying a measurement result in the two-dimensional measuring device according to the present invention, the shape symbol of the measurement object is displayed together with the measurement result, so that what has been measured can be recognized at a glance of the measurement result. Thus, the convenience of the measuring machine is improved.

[Brief description of the drawings]

FIG. 1 is a block diagram showing the overall configuration of a two-dimensional measuring machine according to the present invention.

FIG. 2 is a flowchart showing an example of a control procedure of the two-dimensional measuring machine of the present invention.

FIG. 3 is an explanatory diagram in the case of estimating a rectangle by the procedure shown in FIG . 2 ;

FIG. 4 is an explanatory diagram showing a display of a measurement result obtained by the control procedure shown in FIG . 2 ;

[Explanation of symbols]

A 'object to be measured B point (point specified in the object to be measured) C radial line segment c1 ~ cn edge

──────────────────────────────────────────────────続 き Continued from the front page (72) Inventor Hiroyuki Fujisawa 260-63 Yanagimachi, Hase, Atsugi-shi, Kanagawa Inside Sokia Atsugi Plant Co., Ltd. (56) References JP-A-5-312546 (JP, A) 2-259482 (JP, A) JP-A-63-217480 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) G01B 11/00-11/30 102 G01D 9/00-9 / 42 G06T 1/00-9/40 G09G 5/00-5/40

Claims (2)

(57) [Claims] 1. A method of displaying a measurement result in an image processing type two-dimensional measuring machine, comprising: forming a plurality of radial segments from one point in a measurement object reproduced and displayed on a monitor device to the outside thereof; And each release
Coordinates of each edge of the measurement object on the radial line segment
Identify the value, and select the adjacent first and second edge
An equation of a straight line passing through both edge portions is obtained from the coordinate values, and the coordinate value of the third edge portion adjacent to the second edge portion is obtained by
It is determined whether the straight line equation is satisfied, and the coordinate value of the third edge portion satisfies the straight line equation.
If not, remember the straight line equation and
A third edge portion and a fourth edge adjacent to the third edge portion
Equation of a new straight line passing through the part is obtained, and the coordinate value of the third edge part satisfies the equation of the straight line
Sometimes, the fourth edge portion adjacent to the third edge portion is
It is determined whether or not the straight line is satisfied.
For the fifth edge portion adjacent to the edge portion, the third edge
Processing similar to that performed for the edge and fourth edge
And, after obtaining the equation of the new straight line, the fourth edge
The fifth edge portion adjacent to the edge portion is the equation of the new straight line.
Is determined, and regarding the fifth edge portion,
The same processing is performed as for the third edge part, and the same processing is performed for the next adjacent edge part.
Iteratively calculate multiple straight line equations until returning to the first edge
From the multiple straight line equations thus obtained.
A method for displaying a measurement result in a two-dimensional measuring machine, wherein a shape of a fixed object is estimated, and a shape symbol of the measurement object is printed on a printer or displayed on the monitor device together with the measurement result. 2. The apparatus according to claim 1, wherein the shape symbol of the object to be measured is estimated by a central control device from various shape symbols stored in an image memory in advance. A method for displaying measurement results on a 2D measuring machine