JPH0812054B2 - Method of measuring object using imaging means - 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 inspecting an object using an image pickup means for measuring the length and the like of the object using the shape and size data of the object.

[0002]

2. Description of the Related Art Japanese Patent Application Laid-Open No. 59-709 discloses a device for measuring the size of an object (subject) by using an endoscope.
There is a conventional example disclosed in No. 03.

In this conventional example, a laser beam generating means is required for projecting a reference length required for length measurement onto an object, and the laser beam is guided to the endoscope side. The length cannot be measured without a light guide and a projection lens.

In this conventional example, since the structure of the endoscope is complicated and the tip portion has a large diameter, there is a drawback that the endoscope cannot be inserted into a thin insertion hole or the like.

Further, in this conventional example, there is a large restriction on the measurement condition that the portion on which the laser beam is projected cannot be accurately measured unless it is a plane perpendicular to the laser beam, which is not practical.

For this reason, the present inventor has filed Japanese Patent Application No. 1-2834.
In the related technology example of No. 97, electronic endoscope or small TV
An object having a known shape and size is imaged in advance using an image pickup means such as a camera to obtain an image, and a perspective view of the object is drawn by computer graphic drawing means using the shape and size data of the object. We proposed a method to measure the length of the inspection part of the object by changing the parameters for drawing the perspective diagram and matching it with the image of the object.

In the above-mentioned related art example, a process of matching the two images by superimposing a perspective view of the target on the image of the target is required.
As shown in FIGS. 23 and 24, this is executed by changing six parameters of the position x, y, z and the directions θx, θy, θz of the figure of the object on the three-dimensional coordinate system.

[0008]

In the above related art example,
The operator operates the keyboard to change these parameters so that the image of the object and the image of the corresponding figure are superimposed, but this operation is very complicated and is performed by an extremely skilled operator. Even so, I couldn't superimpose them.

The present invention has been made in view of the above-mentioned points, and the image of the object and the figure corresponding to the object are made to coincide with each other without requiring a complicated operation to measure the measurement site of the object. An object of the present invention is to provide a method for measuring an object using an image pickup means capable of measuring length, area, and the like.

[0010]

In order to achieve the above object, according to the present invention, an object having a known shape and dimension is imaged by an image pickup means.
First to image and display an image of the object on a monitor screen
Based on the process of
And a second process for forming the graphic and the first process
On the figure on the display screen displayed in the process of
Positions on the display image corresponding to at least 3 specific parts of
The third process of inputting and specifying the device and this third process
The data of each position on the display image specified by the process
The figure is substantially
Determine the posture of the figure so that it will look like
4th process and the part to be inspected of the object.
5) Inputting and specifying the positions of multiple points on the display image
And the process specified in this fifth process
Based on the data of each position on the displayed image
A sixth process of determining data for each corresponding position,
Of each position on the figure determined in the sixth process
Based on the data, input and specified in the fifth process
Of the length or area defined by the
And a seventh process of calculating a measurement amount .

[0011]

According to the above process, by using each position data on the figure corresponding to the plurality of points designated in the fifth process, the length of the line segment defined by the plurality of points or the area By using the inspection method for measuring the measured amount such as the area, the posture of the graphic can be automatically adjusted so that the posture of the graphic substantially matches the image of the object, so that the complicated posture is complicated. Calculate the length of line segments such as cracks without any operation.

[0012]

Embodiments of the present invention will be described below with reference to the drawings.

1 to 15 relate to a first embodiment of the present invention, FIG. 1 is a structural view of an endoscope apparatus used in the method of the first embodiment, and FIG. 2 is a schematic perspective view showing a jet engine. FIG. 3 is a perspective view showing a blade as an inspection object in a jet engine, FIG. 4 is a schematic view showing a simulated figure of the blade constituted by shape dimension data, and FIGS. 5 and 6 are specified by a monitor screen displaying the blade. 5 is an explanatory view showing that two straight lines are determined by the designation of the positions shown in FIGS. 5 and 6, and FIG. 8 is a diagram showing the distances on the two straight lines. Is an explanatory view showing that the other position is determined with respect to one position, FIGS. 9 and 10 are explanatory views showing a state in which another position is designated, and FIG. 2 determined by the designation of 10 positions 13 is an explanatory view showing a straight line and the like, and FIG. 12 is an explanatory view showing that there is a degree of freedom of a rotational position (rotation angle) around a straight line passing through two points after designation of two points on the object. Is an explanatory view showing that the lengths of these line segments are calculated and displayed by designating two points on the monitor screen for displaying the blade. FIG. 14 shows the blades by designating the two points in FIG. 15 is an explanatory diagram showing that two points on the simulated figure are determined, and FIG. 15 is a flowchart.

As shown in FIG. 1, an endoscope apparatus 1 according to the first embodiment has an electronic endoscope 2, a light source device 3 for supplying illumination light to the electronic endoscope 2, and an electronic endoscope 2. A video signal processing device 4 for performing signal processing for the image pickup means, a standard video signal generated by the video signal processing device 4 is displayed on the monitor 5, and a simulated figure of an object such as the blade 6 is displayed. The measuring device 9 measures the measured amount such as the length or area of the inspection target portion such as the crack 8 of the target object such as the blade 6 by bending.

The electronic endoscope 2 has an elongated insertion portion 11, and a wide operation portion 12 is formed on the rear end side of the insertion portion 11.

A light guide 13 is inserted into the insertion portion 11. By connecting the end of the light guide 13 to the light source device 3, the illumination light of the lamp 14 is transmitted and the end face on the side of the tip 15 is illuminated. The light is emitted toward the subject through the lens 16.

The illuminated object is lit by a target lens 18 provided at the tip 15 of a CC arranged at its focal plane.
The image is formed on D19. A mosaic color filter is attached to the image pickup surface of the CCD 19 to separate colors for each pixel.

The signal photoelectrically converted by the CCD 19 is
It is input to the video signal processing device 4 via the signal line 20,
After the video signal processing, it is input to the image memory 21 of the measuring device 9 and temporarily stored. The video signal read from the image memory 21 can be output to the monitor 5 via the synthesizing device 22, and the image 6A of the object (the blade 6 in this case) can be displayed on the monitor image.

The measuring device 9 includes a CPU 24 for executing a measuring program for measuring the size (length) of the crack 8 and the like in the object, and a floppy disk in which data defining the shape and size of the object is recorded. A floppy disk device 25 that reads these data from the disk and outputs them to the CPU 24, and a magnetic disk device 26 that is used for copying and using this data, recording the execution program of the measuring device 9, and the like. It is composed of a keyboard 27 used for inputting data and the like, and a graphic generator 28 for generating a simulated graphic of the object 6 or a cursor under the control of the CPU 24.

The synthesizing device 22 is controlled by the video signal (also referred to as a subject image or an image signal) output from the image memory 21 and the CPU 24 to control the graphic generating device 28.
It is also possible to output one of the object simulated figure (signal) output from the monitor 5 to the monitor 5, or to superimpose the image and the figure and output to the monitor 5. The position of each cursor when the cursor is moved on the monitor screen by operating the keyboard 27 is grasped by the CPU 24.

Regarding a method of measuring an object using this device 1, for example, the jet engine 3 of an aircraft shown in FIG.
The case of inspecting the inside of 1 will be described.

Inside the jet engine 31, there are a turbine, a compressor, etc.
Are arranged in large numbers. The rotor 32 has a large number of blades 6 shown in FIG. 3 mounted in a radial pattern, and rotates about its center as a rotation axis.

On the blade 6, cracks 8 may occur as shown in FIG. 3 due to fatigue due to long flight time, collision of foreign matters and the like.

If the crack is shorter than a certain level, it can be used without any trouble. However, if the crack is longer than that, if the engine is used as it is, the blade 6 may be damaged, and the entire engine may be damaged. May cause major obstacles. In order to prevent such a situation, the aircraft is required to undergo regular inspection every time a certain flight time elapses, and crack inspection of this blade is particularly important. Then, as described above, it is necessary to measure the length of the crack 8 and compare it with the inspection level.

By inserting the distal end side of the electronic endoscope 2 through the inspection hole of the engine 31, the blade 6 can be put in the field of view for imaging as shown in FIG.

An image obtained by picking up the blade 6 as the inspection object is stored in the image memory 21 in the measuring device 9, and after that, writing is prohibited to make it a still image,
Alternatively, the moving image is displayed as it is on the monitor 5 (as shown in FIG. 1) via the synthesizing device 22.

On the other hand, the data defining the shape and size of the blade 6 is provided from a CAD device (not shown) or the like, and is input to the measuring device 9 by the floppy disk device 25, for example. The floppy disk device 25 may be used by being copied to the magnetic disk device 26.

Based on this shape dimension data, the CPU 24 causes the figure generating device 28 to execute xyz3 as shown in FIG.
A simulated figure of the blade 6 is formed on the dimensional coordinate system, and is displayed on the monitor 5 via the synthesizer 22. In this case, the image 6A may be once switched from the display, the line image of different colors may be used for the superimpose display, or the image may be displayed in a sub-screen.

When the position and orientation of this figure on the xyz three-dimensional coordinate system are changed and the figure is viewed from the viewpoint S on the z-axis, it is substantially the same as the image 6A displayed on the monitor 5 in FIG. It is necessary for the measuring method in this embodiment (and the above-mentioned preceding example) to have a consistent appearance.

In this embodiment, the operator designates the position in the image corresponding to the specific portion in the figure shown in FIG.

First, the node N1 is used, and the position corresponding to this node N1 in the image 6A in FIG. 1 is designated by moving the cursor K as shown in FIG. This cursor K is generated as a video signal by the graphic generator 28 shown in FIG.
And is displayed on the monitor 5. The position of the cursor K on the monitor screen is controlled by the CPU 24 based on the operation of the operator using the keyboard 27. Therefore, the CPU 24 always keeps track of the position of the cursor K.

Similarly, the position corresponding to the node N2 in the image in FIG. 4 is designated by using the cursor K in the image 6A in FIG. 1 as shown in FIG.

In this way, it is possible to specify the positions of the nodes N1 and N2 on the monitor screen displaying the image 6A by using x
On the yz three-dimensional coordinate system, two straight lines g1 and g2 passing through the viewpoint S are determined as shown in FIG. The node N1 is located somewhere on the straight line g1, and similarly, the node N2 is located somewhere on the straight line g2.

On the other hand, since the nodes N1 and N2 are points on the blade whose shape dimensions are defined, the spatial distance N1N2 between these two points is fixed. Therefore, assuming that the node N1 exists at a certain position on the straight line g1, the position of the node N2 is a distance N1N2 with the node N1 as the center, as shown in FIG.
It should be at the intersection of a straight line g2 and a sphere Sp having a radius of. Generally, the maximum number of intersections between a sphere and a straight line is two. Therefore, when the node N1 is assumed to be at the position shown in this figure in FIG.
It should be in either of 2b.

That is, when the positions of the nodes N1 and N2 on the screen are designated, the straight lines g1 and g2 are determined, and if the node N1 is assumed at a certain position on the straight line g1, the position of the node N2 is
It will exist at either of two fixed points on the straight line g2.

Next, the operator designates the position of the straight line L1 on the simulated figure of the blade of FIG. 4 on the monitor screen displaying the image 6A. This is because the position of the node N1 has already been specified on this screen, so as shown in FIG.
Other point P3 different from the node N1 on the straight line L1 may be designated on this screen.

Similarly, in order to specify the position of the straight line L2, the operator specifies a point P4 at a position different from the node N2 on the straight line L2 (of FIG. 4), as shown in FIG. Designating these points P3 and P4 is to determine straight lines g3 and g4 passing through the viewpoint S on the xyz three-dimensional coordinate system, as shown in FIG.

Up to now, the operator has set four points N1, N2, P3, and P4 as shown in FIGS. 5, 6, 9, and 10.
Was designated on the monitor screen displaying image 6A.

Thereafter, the CPU 24 automatically executes the process of changing the posture of the simulated figure simulating the blade.

In FIG. 8, assuming a node N1 at a certain position on the straight line g1, the node N2 is the intersection N2a in this figure.
Alternatively, the position is determined to be either N2b or N2b. Now node N2
Is assumed to be the position of the intersection N2a, for example. Node N
When the positions of the two points N1 and N2 are fixed, the degree of freedom remaining for determining the attitude of the blade 6 is, as shown in FIG. 12, a straight line m passing through the two points N1 and N2 as an axis. It is only the rotational (angle) position θ of the simulated figure.

Therefore, a certain value is also assumed for the rotational position θ. In this way, the posture of the simulated figure of the blade 6 is decided for the time being. This confirmed figure is shown in FIG.

In FIG. 11, the shortest spatial distance between the straight line g3 and the straight line L1 is d1. If this distance d1 = 0, it means that the straight line g3 and the straight line L1 intersect, but in general d1 = 0 does not hold, and the straight line g3 and the straight line L
1 does not intersect.

Similarly, the shortest spatial distance between the straight line g4 and the straight line L2 is d2.

This distance d2 is also not generally 0.

The sum of squares of these distances d1 and d2 is D = d1 ² + d2 ² .

If the node N on the figure on the straight line g1
The position of 1 coincides with the position of N1 on the actual blade 6, and the position of the node N2 on the graphic also coincides with the position of N2 on the actual blade 6.
If the rotational position θ in the figure also matches the actual rotational position, when the blade figure on the xyz three-dimensional coordinate system of the blade in FIG. 11 is viewed from the viewpoint S, the actual blade image 6A displayed on the monitor is displayed. They look exactly the same and in the same position.

The straight lines g3 and g4 are straight lines L1 and L1, respectively.
It intersects with L2.

Therefore, if the distances d1 and d2 are conditions d1 = 0,
d2 = 0, that is, the sum of squares D becomes D = 0. If the attitude of the blade figure changes in this state, the sum of squares D> 0
Becomes the value of.

Therefore, the position of the node N1 on the straight line g1 is variously changed, and the rotational position θ is also variously changed for each of them, and the value of the sum of squares D is obtained for all of them.

That is, as shown in Table 1, the position of the node N1 and the value of the rotational position θ are varied at practical pitches (indicated by N1j and θi, respectively), and for all combinations thereof. (indicated by Dji.) flat side sum D Te seek value. Then, in Table 1, the combination of the position of the node N1 that gives the minimum sum of squares Dji and the rotational position θ means the attitude of the blade figure closest to the actual attitude of the blade.

[0051]

[Table 1]

In this way, the CPU 24 calculates the sum of squares Dji in Table 1 and finds the position and θ of N1 that gives the minimum sum of squares D. As a result, the posture of the blade simulated figure is extremely excellent with respect to the actual posture of the blade 6,
And they can be matched automatically.

As described above, the operator has only to specify the four points N1, N2, P3 and P4 on the screen.

Since there are two points N2 with respect to one point N1 as described above, the value of the square sum Dji which is twice the number in Table 1 is actually obtained. The minimum value will be selected from.

The above steps are shown in the flowchart of FIG.

In this way, once the posture of the simulated figure of the blade 6 can be matched with the actual posture of the blade, the length of the crack 8A in FIG. 13 can be easily measured.

That is, the operator may specify the positions of the points P5 and P6 at both ends of the crack 8A on the image 6A with the cursor in FIG.

The fact that the positions of the points P5 and P6 are designated on the screen means that the straight lines g5 and g6 passing through the viewpoint S are determined on the xyz three-dimensional coordinate system as shown in FIG. . When the straight lines g5 and g6 are determined, the intersection of the straight lines g5 and g6 with the blade simulation figure in the three-dimensional space is calculated by the CPU 24.
Is calculated.

In FIG. 14, the straight line g5 intersects with the triangular element E1 forming the blade simulation figure, and the intersection is designated as Q1. Further, the straight line g6 intersects with the element E2, and the intersection is designated as Q2.

The intersections Q1 and Q2 correspond to both ends of the crack 8 on the blade 6. X of these intersections Q1 and Q2
The yz coordinates are, of course, calculated by the CPU 24, so the length Q1Q2 of the crack 8 is also calculated.
Then, as shown in FIG. 13, it is displayed in, for example, a corner of the monitor screen.

According to this one embodiment, the operator only needs to specify a position on the image of the blade 6 that corresponds to a specific position on the graphic simulating the blade 6, and then the CPU 2
Since 4 etc. automatically determines the figure of the posture that makes the appearance substantially coincide with this image, the operator does not need to perform a complicated work to make it coincide and the length of cracks etc. Can be easily measured.

Further, according to the first embodiment, there is an advantage that the length and the like can be accurately obtained even if the portion to be inspected is not a flat surface.

By the way, in the above-mentioned related art example by the present inventor, a perspective view drawn by using the shape and size data of the object (in the preceding example, called a computer graphic image, C
It was necessary to display a G image on the monitor. This is because the operator performed the work of changing the posture of the figure to match the image of the object while comparing the perspective view with the image of the object.

However, in this embodiment, it is not necessary for the operator to perform such work, and since the CPU 24 automatically makes the matching, it is not necessary to display the perspective view on the monitor. However, it is better to display it in order to notify the operator of a specific portion such as the contact Ni.
Incidentally, as shown in the related art example described above, when it is desired to display the scale of the reference pitch on the image of the object and read the length of the flaw by visual measurement, the same display as in the case of the preceding example is displayed. You can also

Also, as shown in the related art example, it is obvious that the area of the inspection target portion can be measured by designating a plurality of points around the inspection target portion. Further, as shown in the related art example, the present invention can be applied to the case where an image of an object is captured using a fiberscope and a television camera.

Furthermore, the same is true when an image of an object is picked up by the small television camera shown in the related art example.

FIG. 16 shows a modification of the measuring device 9 shown in FIG.

In this modification, a cursor K shown in FIG. 5 or the like is created as a shape by the cursor generation device 41 and is displayed on the monitor 5 via the composition device 22. Then, by scanning the cursor movement key of the keyboard 27 or operating a mouse (not shown), the cursor on the monitor 5 is moved to the designated direction and position via the cursor generator 41. The cursor movement data is also sent to the graphic generation device 28 and the calculation device 42,
Both are designed to grasp where the cursor is currently on the monitor screen.

By the way, when the position in the image corresponding to the specific portion on the graphic is designated by using the cursor, the graphic generator 28 uses the designated position data on the monitor screen to display the graphic as an image. The posture of the figure is changed so as to make the appearance substantially coincident, and the best posture is obtained.

After that, the positions on the screen of a plurality of points forming the portion to be inspected of the object are designated again by the keyboard and the cursor, and the position data on the screen of these plurality of points are grasped by the calculation device 42. ing. The calculation device 4
2 calculates the three-dimensional spatial positions of a plurality of points forming a portion to be measured using the position data. As a result, the actual length or area of the portion to be measured is calculated, and the calculated result is sent to the monitor 5 via the synthesizer and displayed as shown in FIG. Incidentally, in FIG. 16, the keyboard 27 and the cursor generating device 41 constitute a position determining device 43.

17 to 22 relate to a second embodiment of the method for inspecting an object according to the present invention, and FIG. 17 is an explanatory view showing a state in which a specific position is designated on a monitor screen displaying a blade, FIG.
8 is an explanatory view showing a state of designating another position, FIG.
9 is an explanatory view showing a straight line determined by designation of a position,
FIG. 20 is an explanatory view showing how a specific straight line in a three-dimensional coordinate system is determined by giving an angle formed by the specific position and the straight line, and FIG. 21 shows two points on the object after passing two points. 22 is an explanatory diagram showing that there is a degree of freedom of rotational position around a straight line, and FIG. 22 is an explanatory diagram showing a subject image on the monitor screen and the figure specified in FIG.

In FIG. 17, first, the position of the node N1 on the screen is designated in the same manner as shown in FIG. 5 of the first embodiment. Since the node N2 is outside the drawing as shown in FIG. 17, the position cannot be specified.

Then, the position of the point P3 on the straight line L1 is designated in the same manner as shown in FIG. 9 of the first embodiment. Then, as shown in FIG. 18, a point P2 on the straight line L2 is designated. The above is all of the work of designating the position on the screen.

When the points N1, P3, P2 are designated on the screen, the straight lines g1, g3, g2 as shown in FIG. 19 are fixed, as described in the first embodiment. In FIG. 19, F
Indicates the entire three-dimensional figure. Since the optical system of the endoscope has a large distortion, the image of the object is usually an image with distortion. Therefore, the positions designated on the screen of N1, P3, and P2 correspond to the image with distortion, and therefore, the distortion is calculated here to be converted to the position without distortion.

Next, the CPU substitutes appropriate initial values for the two parameters z1 and θ1. z1 is the node N
With a z coordinate of 1, we first assume N1 at a suitable place on g1. As shown in FIG. 20, θ1 is an angle formed by the straight line L1 and g1, and the CPU has an appropriate initial value as θ1.
For example, 90 ° is first substituted.

In this xyz three-dimensional coordinate system, the straight lines g1, g3 and g2 are at fixed positions by the steps already described. If the z coordinate z1 of the contact point N1 is given here, N1 is a point on the straight line of g, so the y and z coordinates of N1 are naturally determined, and the three-dimensional position of the node N1 is determined.

The straight line L1 passes through the node N1 and lies in a plane including the straight lines g1 and g3. Therefore, as shown in FIG. 20, given the angle θ1 formed by L1 and g1, this 3
The position of the straight line L1 in the dimensional coordinate system is determined.

When the positions of the contact point N1 and the straight line L1 are determined, the posture of the three-dimensional figure F can be freely set, as shown in FIG. 21, with the node N1 fixed and rotated around the straight line L1. Only F2, F3, ... Then, as shown in FIG. 20, the straight line L2 in the figure F must intersect with the straight line g2. Therefore, in FIG.
There are two possible postures of the figure F: F1 and F3. In general, there are two intersections between a figure rotated as shown in FIG. 21 and a straight line, as in P21 and P23.

As described above, the postures that the figure F can take are limited to two specific postures such as F1 and F3 in FIG. 21, given Z1 and θ1.

FIG. 22 shows this on the screen of the monitor. The solid line shows the subject image, and the broken line shows the figure F. Both share the node N1 and the straight line L1. Also,
They intersect at a point P2 on the straight line L2. Further, neither of them can see the part shown outside the monitor screen.

Then, only one of F1 and F3 in FIG. 21 is shown as a figure F in FIG. Figure F
At the time of displaying, the CPU draws the figure F by adding the distortion of the optical system so that the same condition as the image of the object is obtained.

The figure F of FIG. 22 is displayed by Z1 and θ1 which are appropriately given by the CPU. Subsequently, the operator operates the keyboard to freely increase or decrease each of the parameters Z1 and θ1. Even if Z1 and θ1 are changed, as described above, the node N1 and the straight line L1 in the figure F are not displaced from the positions shared with them in the subject image. Further, the intersection of the figure F and the subject image at the point P2 is also unchanged. While always satisfying the condition, the figure F changes its posture as the parameters Z1 and θ1 change. Therefore, the operator can adjust Z1 and θ1 while watching the monitor as shown in FIG. 22, and adjust the figure F so that it overlaps the subject image.

By the way, in the first embodiment, the positions of the two nodes N1 and N2 and the two straight lines L1 and L2 shown in FIG. 4 must be designated on the screen. This is possible when the image is captured as shown in FIG. 5 of the first embodiment, but in the endoscopic examination, the place where the endoscope can be inserted is often limited, and this is always the case. Such an ideal image is not always obtained. For example, FIG. 17 of this second embodiment.
As shown in, the image may be captured only in the situation where one node N2 is not included in the image.

Therefore, the second embodiment is a method in which the figure of the object can be superimposed on the image of the object and the measurement can be performed even when only the image of the severe condition as shown in FIG. 17 can be obtained. is there.

As described above, in the second embodiment, as shown in FIG. 17, even under the condition that the node N2 is out of view and cannot be seen, the points N1 and P in FIG.
By designating the positions 2 and P3 on the screen and adjusting the two parameters of the Z coordinate Z1 of N1 and the angle θ1 in FIG. 20, the figure can be superimposed on the subject image. Then, measurement becomes possible. The parameter adjustment is extremely easy to operate as compared with the case where many parameters have to be changed. In addition, the condition that both nodes N1 and N2 must be within the screen as in the first embodiment is unnecessary, and the application range is extremely wide.

As described above, according to the present invention,
The effect of being able to measure the length, area, etc. of the measurement site on the object by matching the image of the object with the graphic image created corresponding to the object without requiring complicated operations is there.

[Brief description of drawings]

1 to 15 relate to a first embodiment of the present invention, and FIG. 1 is a configuration diagram of an endoscope apparatus used in the method of the first embodiment.

FIG. 2 is a schematic perspective view showing a jet engine.

FIG. 3 is a perspective view showing a blade as an inspection object in a jet engine.

FIG. 4 is a schematic diagram showing a simulated figure of a blade composed of shape dimension data.

FIG. 5 is an explanatory diagram showing a state in which a specific position is designated on a monitor screen displaying a blade.

FIG. 6 is an explanatory view showing a state in which a specific position is designated on a monitor screen displaying a blade.

FIG. 7 is an explanatory diagram showing that two straight lines are determined by specifying a position according to FIGS. 5 and 6;

FIG. 8 is an explanatory diagram showing that one position is determined with respect to the other position because the distances on two straight lines are known.

FIG. 9 is an explanatory diagram showing how to specify another position.

FIG. 10 is an explanatory diagram showing how to specify another position.

FIG. 11 is an explanatory diagram showing two straight lines and the like determined by designating the positions in FIGS. 9 and 10;

FIG. 12 is an explanatory diagram showing that there is a degree of freedom of a rotational position (rotation angle) around a straight line passing through two points after designating two points on the object.

FIG. 13 is an explanatory diagram showing that the lengths of these line segments are calculated and displayed by designating two points on the monitor screen displaying the blade.

FIG. 14 is an explanatory view showing that two points on the simulated figure of the blade are determined by designating the two points in FIG.

FIG. 15 is a flowchart

16 is an explanatory diagram showing a modified example of the measuring device 9 shown in FIG.

FIGS. 17 to 22 relate to a second embodiment of the method for inspecting an object of the present invention, and FIG. 17 is an explanatory view showing a state of designating a specific position on a monitor screen displaying a blade.

FIG. 18 is an explanatory diagram showing a state of designating another position.

FIG. 19 is an explanatory diagram showing a straight line determined by specifying a position.

FIG. 20 is an explanatory diagram showing how a specific straight line is determined in a three-dimensional coordinate system by giving an angle between the specific position and the straight line.

FIG. 21 is an explanatory diagram showing that, after designating two points on the object, there is a degree of freedom of rotational position around a straight line passing through the two points.

22 is an explanatory diagram showing a subject image on the monitor screen and the figure specified in FIG. 21. FIG.

23 and 24 are explanatory diagrams of related art examples.
FIG. 23 is an explanatory diagram of positional parameters when displaying a computer graphic image.

FIG. 24 is an explanatory diagram of rotation angle parameters when displaying a computer graphic image.

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Claims (1)

[Claims] 1. A first of geometry is imaged by an imaging means of the object is known, and displays an image of the object on the monitor screen
Process, and a second process for forming the figure based on the known data of the geometrical dimensions, and the previous process on the display screen displayed in the first process.
Display image corresponding to at least three specific parts on the graphic
A third process of inputting and designating a position on the image and a display image designated and input by this third process
Based on the data of each position, the figure is displayed on the display image.
The shape of the above figure should be
Fourth process of determining posture and display image of a plurality of points forming a region of the object to be inspected
A fifth process specified by entering the position of the upper, on the fifth display image by entering specified in the process of
Each corresponding position on the figure based on the data of each position
The sixth process of determining the data of each of the positions on the figure determined by the sixth process.
Based on the data, input and specified in the fifth process
Of the length or area defined by the
Measuring of an object using an imaging means and having a seventh process for calculating the measured quantity, the
Fixed method.