JP3853638B2 - Image measuring apparatus, image measuring method, and image measuring program - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an image measuring apparatus that captures an image of an object to be measured (hereinafter referred to as a workpiece) with an imaging device such as a CCD camera and measures the shape of the workpiece based on the workpiece image.
[0002]
[Prior art]
When measuring a workpiece in such an image measuring device, the workpiece is first imaged by the imaging device and the workpiece image is displayed on the CRT screen. Then, on the CRT screen on which the work image is displayed, a location to be measured is designated with a mouse or the like. Based on this designation, predetermined image processing is performed on the location by an attached computer or the like, and measurement values such as length, width, and diameter are output. The output measurement values are output in a list form in which serial numbers, inspection items, measurement values, tolerances, and the like are illustrated.
[0003]
[Problems to be solved by the invention]
However, the conventional image measuring apparatus has a problem that it is difficult to understand at a glance which part of the workpiece image the measurement value output in the list format is.
The present invention has been made in view of this problem, and an object thereof is to make it easy to visually and intuitively understand the correspondence between measurement results and measurement locations.
[0004]
[Means for Solving the Problems]
In order to achieve the above object, an image measuring apparatus according to the first invention of the present application includes a work image display unit that displays a work image on a screen, and a designation unit that specifies a measurement target location on the displayed work image. Image measurement means for performing image processing on the measurement target portion, image measurement, identification symbol giving means for giving an identification symbol to the measurement result of the image measurement means, and the measurement result as the identification symbol Measurement result display means for displaying in association with each other, and the work image display means is configured to superimpose and display the identification symbol in the vicinity of the measurement location.
According to the first aspect of the invention, the work image is displayed on the screen by the work image display means, and the measurement target location is specified by the specifying means on the displayed work image. Image measurement is executed by the image measuring means at the designated measurement target location, and the measurement result is output. The measurement result is displayed in association with the identification symbol by the measurement result display unit together with the identification symbol provided by the identification symbol provision unit. Furthermore, on the work image display means, this identification symbol is displayed in a superimposed manner in the vicinity of the corresponding measurement target location. This makes it easy to intuitively understand the correspondence between measurement locations and measurement results.
[0005]
In the first aspect of the invention, the identification symbol assigning means automatically generates an identification symbol based on a predetermined procedure and a state in which an operator inputs the identification symbol and assigns the identification symbol based on the input. Thus, it is possible to switch between the state where the generated identification number is assigned. Further, the work image display means can be configured to display a measurement type display symbol indicating the type of measurement performed at the measurement location.
[0006]
Further, the work image display means can be configured to superimpose and display character information related to any one of the measurement result, tolerance matching result, or pass / fail judgment result in the vicinity of the measurement location. In the first aspect of the present invention, image recording means for recording the image displayed on the work image display means as an image file may be further provided.
[0007]
An image measurement method according to a second invention of the present application includes: a work image display step for displaying a work image on a screen; a designation step for designating a measurement target location on the displayed work image; and the measurement target location. An image measurement step for performing image processing on the image, an identification symbol providing step for assigning an identification symbol to the measurement result of the image measurement means, and a measurement result for displaying the measurement result in association with the identification symbol A display step, wherein the work image display step is configured to superimpose and display the identification symbol in the vicinity of the measurement location.
[0008]
In the identification symbol assigning step, an operator inputs the identification symbol and assigns the identification symbol based on the input, and an identification symbol is automatically generated based on a predetermined procedure and the generated identification It is preferable that any of the step of assigning a number is selectively executed.
[0009]
In the work image display step, it is preferable that a measurement type display symbol indicating the type of measurement performed is displayed at the measurement location.
[0010]
An image measurement program according to a third invention of the present application includes a work image display step for displaying a work image on a screen, a designation step for designating a measurement target location on the displayed work image, and the measurement target location. An image measurement step for performing image measurement on the image, an identification symbol providing step for assigning an identification symbol to the measurement result of the image measurement means, and a measurement for displaying the measurement result in association with the identification symbol The result display step is configured to cause a computer to execute, and the work image display step is configured to superimpose and display the identification symbol in the vicinity of the measurement location.
[0011]
In the identification symbol assigning step, an operator inputs the identification symbol and assigns the identification symbol based on the input, and an identification symbol is automatically generated based on a predetermined procedure and the generated identification Preferably, any one of the numbering steps is selectively performed. In the work image display step, it is preferable that a measurement type display symbol indicating the type of measurement performed is displayed at the measurement location.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings. FIG. 1 is a perspective view showing the overall configuration of an image measurement system according to an embodiment of the present invention. This system includes a non-contact type image measuring device 1, a computer system 2 that controls the image measuring device 1 and executes necessary data processing, and a printer 3 that prints out measurement results and the like. Yes.
[0013]
The image measuring machine 1 is configured as follows. That is, a measurement table 13 on which the workpiece 12 is placed is mounted on the gantry 11, and this measurement table 13 is driven in the Y-axis direction by a Y-axis drive mechanism (not shown). Support arms 14 and 15 extending upward are fixed to the center of both side edges of the gantry 11, and an X-axis guide 16 is fixed so as to connect both upper ends of the support arms 14 and 15. An imaging unit 17 is supported on the X-axis guide 16.
[0014]
The imaging unit 17 is driven along the X-axis guide 16 by an X-axis drive mechanism (not shown). A CCD camera 18 is mounted on the lower end of the imaging unit 17 so as to face the measurement table 13. The imaging unit 17 includes a Z-axis drive mechanism that moves the position of the CCD camera 18 in the Z-axis direction, in addition to a lighting device and a focusing mechanism (not shown).
[0015]
The computer system 2 includes a computer main body 21, a keyboard 22, a joystick box (hereinafter referred to as J / S) 23, a mouse 24, and a CRT 25.
The computer main body 21 is configured, for example, as shown in FIG. That is, the image information of the workpiece 12 input from the CCD camera 18 is stored in the image memory 32 via the interface (hereinafter referred to as I / F) 31.
[0016]
The CAD data of the workpiece 12 created by a CAD system (not shown) is input to the CPU 35 via the I / F 33, developed into bitmap image information by the CPU 35, and then stored in the image memory 32. The image information stored in the image memory 32 is displayed on the screen of the CRT 25 via the display control unit 36.
[0017]
On the other hand, code information and position information input from the keyboard 22, J / S 23, and mouse 24 are input to the CPU 35 via the I / F 34. The CPU 35 performs measurement execution processing and part program creation in accordance with a macro program stored in the ROM 37, an image measurement program including a measurement execution program and a measurement result display program stored in the RAM 40, a part program generation program, a part program, and the like. , And display processing of measurement results.
[0018]
The CPU 35 controls the image measuring machine 1 via the I / F 41 according to the measurement execution process. In addition to CAD data input from a CAD system (not shown), the HDD 38 stores a measurement result display program, a part program generation program, a created part program, and the like. The RAM 40 stores various programs and provides a work area for various processes.
[0019]
FIG. 3 is a functional block diagram showing the configuration of various functions executed mainly by the CPU 35. The measurement location specifying unit 41 is for specifying a location to be measured in the image of the workpiece 12 displayed on the screen of the CRT 25. Specifically, input means such as a keyboard 22 and a mouse 24 are provided. Plays this role. The measurement type designation unit 42 is for designating what kind of measurement is to be performed at the measurement location designated by the measurement location designation unit 41. Specifically, input means such as a keyboard 22 and a mouse 24 are used. Plays this role.
[0020]
The edge detection unit 43 performs edge detection necessary for performing the type of measurement designated by the measurement type designation unit 42 at the measurement location designated by the measurement location designation unit 41, and the point sequence data as the detection result Is output. The point sequence data storage unit 44 is for storing the point sequence data output from the edge detection unit 43. Specifically, the RAM 40 or the HDD 38 plays this role. Based on the point sequence data stored in the point sequence data storage unit 44, the shape calculation unit 45 performs an operation corresponding to the measurement type specified by the measurement type specifying unit 43 and outputs the calculation result. is there.
[0021]
The identification number generator 46 is for giving an identification number to the calculation result output from the shape calculation unit 45. The identification number generator 46 can select a manual mode for assigning an identification number input by an input means such as the keyboard 22 or an auto mode for automatically generating and assigning an identification number that increases in the order of measurement. .
[0022]
The data combining unit 47 is used to combine the calculation result from the shape calculation unit 45 and the identification number assigned to the calculation result by, for example, storing them in association with each other in one file. . Note that the data combining unit 47 can extract data of a portion corresponding to the measurement location from CAD data from a CAD system (not shown), and store the extracted data in association with each other. For example, design data, tolerance data, and the like included in the CAD data can be extracted and stored in association with the calculation result from the shape calculation unit 45.
[0023]
Next, the operation of the image measurement system and the image measurement program according to the present embodiment will be described based on the flowchart shown in FIG. 4 and screen display examples of the CRT 25 shown in FIGS.
First, the image of the workpiece 12 is taken from the CCD camera 18 and displayed on the screen of the CRT 25 (S1). That is, as shown in FIG. 5, the captured image of the work 12 is displayed on the work image display unit 51. On the screen of the CRT 25, in addition to the work image display unit 51, a measurement result display unit 52 for displaying measurement results, a CAD data display unit 53 for displaying CAD data figures, and illumination conditions for the workpiece 12 are set. An illumination condition setting unit 55 for displaying, an icon display unit 56 having an icon for setting a measurement type, a measurement condition setting unit 63 for setting a measurement condition, and the like are displayed.
[0024]
Next, after designating the type of measurement (S2), the location for the measurement is designated (S3). Designation of the type of measurement can be performed by clicking on any of the icons in the icon display section 56 described above with the mouse 24. In FIG. 5, an icon 56a is an icon for instructing measurement of the length between the edges at the measurement location. The icon 56b is an icon for instructing measurement of the diameter of a circle including a part of the arc when the arc is included in the designated measurement location. Reference numeral 56c denotes a display unit for displaying the design of the selected icon. When the icon 56a is selected, the edge detection direction is input by the angle in the display unit 56c, and thereby the edge detection direction is determined.
Here, it is assumed that the icon 56a is clicked and the edge detection direction is the vertical direction of the screen, and the position indicated by the pointer P in FIG. 5 is designated as the measurement location.
[0025]
Next, edge detection processing is executed at the designated measurement location, the measurement designated in S2 is executed, and a measurement value is obtained (S4). For example, when length measurement in the vertical direction of the screen is designated as the type of measurement in S2, the edge detection process is executed by scanning the image in the Z-axis direction. The obtained measurement result is displayed on the measurement result display unit 52.
[0026]
Next, a symbol indicating the type of measurement performed (hereinafter referred to as a measurement type display symbol) is displayed at the measurement location designated in S3 (S5). Here, it is assumed that a double arrow display Y1 (see FIG. 6) corresponding to the icon 56a clicked in S2 is displayed indicating that the length measurement has been executed.
[0027]
Next, an identification number is assigned to the obtained measured value (S6, S7). As described above, the manual mode in which the identification number is input with the mouse 24 or the like and the auto mode in which the identification number is given in the order of measurement can be selected.
When the manual mode is selected, as shown in FIG. 6, the cursor K1 flashes in the vicinity of the double arrow display Y1, and the cursor K1 ′ blinks in the measurement result display section 52, and on the screen of the CRT 25, etc. A display U1 prompting the user to input an identification number is displayed at the top of the work image display unit 51. When the identification number is input by the operator using the keyboard 22 or the like, the input identification number is displayed at the positions of the cursors K1, K1 '(S8), and the display U1 disappears, and the process proceeds to the next step S9.
[0028]
When the auto mode is selected, the cursors K1, K1 ′, display U1 and the like are not displayed, and the position of the latest measurement result displayed in the vicinity of the double arrow display Y1 and the measurement result display column is automatically displayed. The generated identification number is displayed (S8), and the process proceeds to the next step S9.
[0029]
When it is necessary to designate another measurement location (S9), the process returns to S2 again and the same procedure is repeated. If it is not necessary to specify another measurement location, the measurement is terminated.
An example of the screen display of the CRT 25 when the designation of a plurality of measurement locations is completed is shown in FIG. FIG. 7 designates three places where the measurement type display symbols Y1-Y3 are displayed as the measurement of the length (width), and one place where the measurement type display symbol Y4 is displayed as the measurement of the diameter of the arc. Indicates the case where it is specified. Identification numbers 1-4 that are input or automatically generated are displayed on the respective measurement type display symbols Y1-Y4. Moreover, the same identification number 1-4 is displayed on corresponding measurement result display R1-R4.
By printing or saving this screen, it can be used when the workpiece 12 is evaluated later. As a storage format, the work image display unit 51 and the measurement result display unit 52 may be stored together in an image file (for example, TIFF format), and the image of the work image display unit 51 is measured in the TIFF format. The display contents of the result display unit 52 may be stored in a text format, and the two may be associated with each other by storing them in one folder.
[0030]
At this time, when the displayed identification number is clicked on the screen of the CRT 25, the identification number is circled and displayed with a circle C1, as shown in FIG. The circle C1 'is circled and displayed.
In the above embodiment, the corresponding identification number is circled and displayed, but the type of figure surrounding the identification number is not particularly limited, and instead of displaying the figure, the identification number blinks or changes color. You may let them.
[0031]
Although the embodiment has been described above, the present invention is not limited to this. For example, in the above embodiment, the measurement type display symbols Y1-Y4 are displayed. Instead of the symbols, for example, in the measurement result display unit 52, the measurement types ("length", "radius") are displayed in parallel with the measurement results. Etc.) may be displayed.
In the above embodiment, only the identification number is displayed in the vicinity of the measurement type display symbols Y1-Y4. In addition, the measurement results, tolerances, tolerance matching results, etc. are displayed in the vicinity of the measurement type display symbols Y1-Y4. May be displayed.
Further, design value data may be read from a CAD system (not shown) together with the identification number and the measurement result and displayed in parallel. Furthermore, not only design value data but also tolerance data may be read out and displayed in parallel, or the pass / fail judgment of measured value data (for example, ◯ and X) may be displayed based on the tolerance data. Good.
In the above embodiment, the workpiece 12 actually placed on the measurement table 13 is measured. However, the image of the workpiece 12 can be temporarily stored and the same contents can be implemented in an offline format. .
[0032]
【The invention's effect】
As described above, according to the present invention, there is an effect that the correspondence between the measurement result and the measurement location can be easily understood visually and intuitively.
[Brief description of the drawings]
FIG. 1 is a perspective view showing a configuration of a non-contact image measurement system according to an embodiment of the present invention.
FIG. 2 is a block diagram showing a configuration of a computer main body in the image measurement system according to the embodiment of the present invention.
FIG. 3 is a functional block diagram of the apparatus shown in FIGS.
FIG. 4 is a flowchart showing the operation of the apparatus shown in FIG.
FIG. 5 shows an example of a screen display of the CRT 25 in the apparatus of FIG.
6 shows an example of a screen display of the CRT 25 in the apparatus of FIG.
7 shows an example of a screen display of the CRT 25 in the apparatus of FIG.
FIG. 8 shows an example of a screen display of the CRT 25 in the apparatus of FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Image measuring machine, 2 ... Computer system, 3 ... Printer, 11 ... Mount, 12 ... Object to be measured, 13 ... Measurement table, 14, 15 ... Support arm 16 ... X-axis guide, 17 ... Imaging unit, 18 ... CCD camera, 21 ... Computer body, 22 ... Keyboard, 23 ... Joystick box, 24 ... Mouse, 25・ ・ ・ CRT, 31, 33, 34, 39, 41 ... Interface, 32 ... Image memory, 35 ... CPU, 36 ... Display control unit, 37 ... ROM, 38 ... HDD, 40... RAM, 41... Measurement location designation section, 42... Measurement type designation section, 43... Edge detection section, 44. 46, knowledge Number generation unit 47... Data combination unit 51. Work image display unit 52. Measurement result display unit 53... CAD data graphic display unit 55 .. Illumination condition setting unit 56 ... Icon display part, 63 ... Measurement condition display part

Claims (11)

A work image display means for displaying a work image on the screen;
A designation means for designating a measurement target location on the displayed work image;
Image measuring means for performing image processing on the measurement target portion to perform image measurement;
An identification symbol giving means for giving an identification symbol to the measurement result of the image measuring means;
Measurement result display means for displaying the measurement result in association with the identification symbol,
The work image display means is configured to superimpose and display the identification symbol in the vicinity of the measurement location. The identification symbol assigning means causes the operator to input the identification symbol, assigns the identification symbol based on the input, and automatically generates an identification symbol based on a predetermined procedure and the generated identification The image measurement device according to claim 1, wherein the image measurement device is configured to be switchable between a state to which a number is assigned. The image measurement apparatus according to claim 1, wherein the work image display unit displays a measurement type display symbol indicating a type of measurement performed at the measurement location. The image measurement apparatus according to claim 1, wherein the work image display unit superimposes and displays character information related to any one of the measurement result, a tolerance comparison result, and a pass / fail determination result in the vicinity of the measurement location. 5. The image measuring apparatus according to claim 1, further comprising an image recording unit that records an image displayed on the work image display unit as an image file. A work image display step for displaying the work image on the screen;
A designation step for designating a measurement target location on the displayed work image;
An image measurement step for performing image processing on the measurement target portion to perform image measurement,
An identification symbol giving step for giving an identification symbol to the measurement result of the image measuring means;
A measurement result display step for displaying the measurement result in association with the identification symbol,
In the work image display step, the identification symbol is superimposed and displayed in the vicinity of the measurement location. In the identification symbol assigning step, an operator inputs the identification symbol and assigns the identification symbol based on the input, and an identification symbol is automatically generated based on a predetermined procedure and the generated identification The image measurement method according to claim 6, wherein one of the step of assigning a number is selectively executed. The image measurement method according to claim 6, wherein the workpiece image display step displays a measurement type display symbol indicating the type of measurement performed at the measurement location. A work image display step for displaying the work image on the screen;
A designation step for designating a measurement target location on the displayed work image;
An image measurement step for performing image processing on the measurement target portion to perform image measurement,
An identification symbol giving step for giving an identification symbol to the measurement result of the image measuring means;
A measurement result display step for displaying the measurement result in association with the identification symbol; and
In the work image display step, the identification symbol is superimposed and displayed in the vicinity of the measurement location. In the identification symbol providing step, an operator inputs the identification symbol and assigns the identification symbol based on the input, and an identification symbol is automatically generated based on a predetermined procedure and the generated identification is generated. The image measurement program according to claim 9, wherein one of the step of assigning a number is selectively executed. The image measurement program according to claim 9, wherein the workpiece image display step displays a measurement type display symbol indicating the type of measurement performed at the measurement location.

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