JP5222430B1 - Dimension measuring apparatus, dimension measuring method and program for dimension measuring apparatus - Google Patents

Abstract

An apparatus, a method, and a program for the apparatus capable of accurate dimension measurement based on a captured image of a measurement object are provided.
An edge position setting unit that performs camera element setting and illumination element setting, pixel coordinate actual size conversion unit that stores conversion data converted into actual dimensions for each pixel coordinate, and a reference measurement object are registered. A pattern registering means, a design value information storage means for storing design value information of a reference measurement object, a means for imaging the measurement object, a pattern recognition means for specifying the measurement object, The measurement position is acquired from the measurement instruction information of the measurement object, the pixel coordinates of the edge position corresponding to the measurement position are detected based on the edge position setting, and the pixel coordinates of the edge position are calculated based on the pixel coordinate actual size conversion data A measuring object dimension measuring means for obtaining an actual dimension from the means, a dimension measuring apparatus 1, a method, and a program for the apparatus.
[Selection] Figure 1

Description

  The present invention relates to a dimension measuring apparatus, a dimension measuring method, and a program for a dimension measuring apparatus that measure a dimension of a workpiece based on an edge position of a workpiece image acquired by an imaging unit.

  In Patent Document 1, in a measurement data creation device that creates measurement setting data for measuring the dimensions of the workpiece by capturing a workpiece and acquiring a workpiece image and detecting an edge in the workpiece image, Design data acquisition means for acquiring design data including position information of a shape line indicating a contour shape of the workpiece, position information of a dimension line, and design value information including design values and tolerances associated with the dimension line; Measurement target location specifying means for specifying the measurement target location and measurement type for the master image including the workpiece, and edge extraction means for extracting an edge from the master image for the specified measurement target location, are extracted. Dimension value calculation means for calculating the dimension value of the measurement target location based on the measured edge, and a design value comprising a design value close to the calculated dimension value Design value information extracting means for extracting information from the design data, measurement target location information including the designated measurement target location and the measurement location, and measurement design including the design value information associated with the measurement location There is disclosed a measurement setting data creation device comprising measurement setting data generation means for generating data.

  Patent Document 2 discloses a method for calibrating an error included in image data. Prepare a calibration work with a straight edge, place it on the stage so that the edge is parallel to the Y-axis of the machine coordinate system, and move the stage and the CCD camera relative to each other in the X-axis direction. Edges are imaged at different positions, the positions where the edges are imaged are detected from the drive amount of the drive mechanism, edge detection is performed in the captured image data, and the coordinates of the edges are output. Then, a calibration method for an image measuring device is disclosed in which an amount of deviation between an edge coordinate obtained by edge detection on an image and an edge position obtained from a driving amount of a driving mechanism is calculated for each imaging point as an edge deviation amount. ing.

JP 2012-37257 A JP 2008-3000 A

  In the measurement setting data creation device described in Patent Document 1, paragraph [0037] describes “analysis of luminance change and extraction of edges”, but there is no description of requirements for recognizing edges. When measuring dimensions from an image, the black object is measured against a white background, so depending on the camera element settings such as the shutter speed and the amount of illumination light, A phenomenon appears in which the edge position moves slightly more than the edge position of the actual measurement object. Then, there is a problem that when the state is imaged, for example, it is measured narrower than the actual dimension, and therefore, accurate dimension measurement cannot be performed. In addition, although there is aberration in the lens, there is no description of countermeasures for this aberration. For example, even if the actual shape of the object to be measured is a quadrangle, the shape of the image is a tall shape, so accurate dimensional measurement is possible. There was a problem that I could not.

  The calibration method of the image measuring apparatus in Patent Document 2 is a technique for countermeasures against aberrations with respect to a lens having an image of a tall shape. However, since the technique cannot be calibrated unless the stage is moved, the apparatus becomes large. was there. Furthermore, since the edge position detection method is not disclosed, depending on the camera element settings such as the shutter speed and the amount of illumination light, the edge position of the captured image is more subtle than the edge position of the actual measurement object. The phenomenon of moving will appear. Then, there is a problem that when the state is imaged, for example, it is measured narrower than the actual dimension, and therefore, accurate dimension measurement cannot be performed.

  The present invention has been devised in view of these problems, and can obtain the edge position of the measurement object on the image without deviation, and can read the exact length with respect to the aberration of the lens. It is an object of the present invention to provide an apparatus, a method, and a program for the apparatus that can accurately measure dimensions based on the captured images.

The dimension measuring apparatus 1 according to claim 1 is an apparatus for measuring a dimension of the measurement object 5 from an image by an imaging means having a lens 15, and is a single calibration having a size exceeding the range to be imaged. The position of the edge 9 that is the boundary between the white portion 7 and the black portion 8 of the plate 30 parallel to the X axis or the Y axis is the pixel coordinates on the image from both the X axis and the Y axis. Edge position setting means for performing camera element settings such as shutter speed, aperture, sensitivity, and white balance adjustment, and illumination element settings such as light quantity and ray direction so as to match, and the image on the image by the imaging means the edge 9 positions per unit dimension of the calibration plate 30 is measured by the pixel coordinates, and stores the converted data in terms of actual dimensions for each of the pixel coordinate Pikuse Coordinate actual dimension conversion means, the shape of the measurement object 5 as a reference, pattern to the size and angle pattern recognition register - and down registration means, measurement point of the measurement object 5 to be the reference length, the angle , registration and design value information storage means for storing design values information that identifies the measured object, such as a radius and diameter, and means for imaging the measurement target 5, by the pattern registering means from the image obtained by imaging the measurement object and pattern recognition means for a particular said measurement target 5 on the basis of the pattern registration information, setting of acquiring the measurement position by the measurement instruction information of the measurement object 5 identified, set by the edge setting means the true measurement position to detect the pixel coordinates of the edge 9 position, the edge 9 position of the pixel on the basis of the data stored in the pixel coordinates actual dimension conversion means on the basis of the A measurement target 5 dimension measuring means for obtaining an actual size from the target, characterized in that it comprises means including.

The dimension measuring method according to claim 2 is a method for measuring the dimension of the measuring object 5 from an image by an imaging means having a lens 15, and is a single calibration plate having a size exceeding the range to be imaged. The position of the edge 9 that is the boundary between the white portion 7 and the black portion 8 that is parallel to the X axis or the Y axis is the same on both the X axis and the Y axis. As described above, a camera element setting such as shutter speed, aperture, sensitivity, and white balance adjustment, and an edge position setting step for setting an illumination element such as a light amount and a light beam direction, and the calibration on the image by the imaging unit the edge 9 positions per unit size of Deployment plate 30 measured in pixel coordinates, and stores the conversion data obtained by converting the actual dimensions for each of the pixel coordinate pixels And ShimegiMinoru size conversion process, the shape of the measurement object 5 as a reference, pattern to the size and angle pattern recognition register - and down registration step, measurement points of the measurement object 5 to be the reference length, the angle , registration and design value information storing step of storing the design value information for specifying a measurement target such as a radius and diameter, a step of imaging the measurement target 5, by the pattern registering means from the image obtained by imaging the measurement object a pattern recognition process for a particular said measurement target 5 on the basis of the pattern registration information, setting of acquiring the measurement position by the measurement instruction information of the measurement object 5 identified, set by the edge setting means the true measurement position to detect the pixel coordinates of the edge 9 position, pixel locus the edge 9 located on the basis of the stored data to the pixel coordinate actual dimension conversion means on the basis of the A measurement target 5 dimension measuring step of obtaining the actual dimensions from, characterized in that it comprises the step of including.

The program for the dimension measurement apparatus 1 according to claim 3, the computer, the size of the measurement target 5, a program for the device to be measured from the image by the imaging means having a lens 15, a range to be imaged The position of the edge 9, which is a boundary parallel to the X axis or the Y axis between the white portion 7 and the black portion 8, of the calibration plate 30 having a size larger than the X axis or the Y axis on the X axis is indicated on the image. Edge position setting procedure for performing camera element settings such as shutter speed, aperture, sensitivity, and white balance adjustment, and illumination element settings such as the amount of light and the direction of light rays so that the respective pixel coordinates coincide from both directions the edge 9 positions per unit size of the calibration plate 30 of the image by the image pickup means is measured in pixel coordinates, said pixel coordinates Comprising a down registration procedure, the reference - and pixel coordinates actual dimension conversion procedures stored converted data obtained by converting the shape of the measurement object 5 as a reference, pattern for the magnitude and angle to the pattern recognition registered in the operational dimension A design value information storage procedure for storing design value information for specifying a measurement object such as a measurement point, length, angle, radius, and diameter of the measurement object 5, a procedure for imaging the measurement object, and the measurement object obtaining a pattern recognition procedure for certain of the measuring object 5 based on the pattern registration information registered by the pattern registering means from the image captured, the measurement position by the measurement instruction information of the measurement object 5 identified the and, based on the set set to detect the pixel coordinates of the edge 9 position corresponding to the measurement position by the edge setting means, stored in the pixel coordinates actual size converting means Was characterized thereby performed the measurement object 5 dimension measurement procedure, gage system the steps comprising 1 to obtain the actual dimensions from the edge 9 position of the pixel coordinates on the basis of the data.

  In any of the first to third aspects of the present invention, an accurate dimension can be measured while there is an aberration of the lens 15 used for imaging, and a plurality of measurement objects 5 are placed in different directions. Even if it is done, the dimension to be measured of the part to be measured can be measured accurately and instantaneously.

It is the block diagram which showed an example of embodiment of the dimension measuring apparatus which concerns on this invention. It is an image which shows a case where camera element setting and lighting element setting are normal. It is an image which shows the case where a camera element setting and a lighting element setting are inappropriate. It is the figure which arranged the square in the shape of a grid. It is a pincushion type image in which squares are arranged in a grid pattern. It is a figure of a barrel type in which squares are arrayed in an eye shape and reflected in an image. It is the image which imaged the rectangular thing of the same magnitude | size mounted on the stage. It is a top view of a measuring object. It is the image which imaged the measuring object mounted on the stage. It is a flowchart explaining the example of the dimension measurement process of this invention. It is a flowchart explaining the example of the dimension measurement process of this invention.

  FIG. 1 shows a dimension measuring apparatus 1 according to the present invention. The dimension measuring device 1 is a device that measures the dimensions of the measurement object 5 from an image by an imaging means including a camera 6, and includes an image processing device 2, an illumination power supply device 3, and an imaging device 4. The image processing apparatus 2 includes a monitor 10, a control apparatus 11, a switch (not shown), and the like, and measures dimensions from the captured image. The imaging apparatus 4 places a stage 20 on which the measurement object 5 is placed, the stage 20 The measurement object 5 is imaged by including a transmission illumination unit 21 that illuminates from below, an XYZ axis adjustment function unit 22 of the stage 20, and a camera 6 with a lens 15, and the illumination power supply device 3 is connected to the transmission illumination unit 21. Control the brightness and illuminance of the lighting so that no spots occur.

In the dimension measuring apparatus 1, the position of the edge 9 that is a boundary parallel to the X axis or the Y axis between the white portion 7 and the black portion 8 is the pixel on the image from both the X axis and the Y axis. Edge position setting means for performing camera element settings such as shutter speed, aperture, sensitivity and white balance adjustment, and illumination element settings such as light quantity and ray direction so that the coordinates coincide, and the calibration on the image The position of the edge 9 for each unit dimension of the plate 30 is measured in pixel coordinates, and pixel coordinate actual dimension conversion means for storing conversion data converted into actual dimensions for each pixel coordinate, and the shape and size of the measurement object 5 serving as a reference Pattern registration means for pattern recognition and registration of height and angle, and measurement points such as measurement point, length, angle, radius and diameter of the measurement object 5 as a reference are specified Design value information storage means for storing design value information, means for imaging the measurement object 5, pattern recognition means for specifying the measurement object 5 based on pattern registration information from the image, and a specified measurement object The measurement position is acquired from the measurement instruction information of the object 5, the pixel coordinates of the edge 9 position corresponding to the measurement position are detected based on the edge 9 position setting, and the position of the edge 9 is determined based on the pixel coordinate actual size conversion data. And a measuring object 5 dimension measuring means for acquiring an actual dimension from the pixel coordinates.

  Since the measurement object 5 is imaged in black on a white background, the edge position setting means accurately determines the position of the edge 9 at the boundary between the white portion 7 and the black portion 8 in order to accurately measure the dimensions. It is indispensable to make it possible to measure the position of the edge 9 and is a means for realizing the accurate measurement of the edge 9 position. For this purpose, first, a calibration plate 30 having a white portion 7 and a black portion 8 as shown in FIG. 2 is placed on the stage 20 on which the measurement object 5 is placed. Is placed so that the direction of the edge 9 that is the boundary of is parallel to the X axis or the Y axis.

  Next, in the calibration plate 30 image picked up by the camera 6, the size of the white portion 7 and the black portion 8 in which the same size is arranged is as shown in FIG. The shutter speed and aperture are set so that the white portion 7 and the black portion 8 have the same size as shown in FIG. 2 so that the image is smaller than the portion 7 and the black portion 8 is not imaged larger than the white portion 7. In addition, camera element settings such as sensitivity and white balance adjustment, and illumination element settings such as the amount of light and the direction of light rays are performed so as not to cause unevenness in illumination brightness and illuminance within the image range.

  Next, in the calibration plate 30 imaged by the camera 6, the luminance for each pixel coordinate is shifted in accordance with the program stored in the control device 11 by one pixel in each of the two directions from the bidirectional direction in the X-axis direction. The position within the same luminance difference range is measured as the provisional edge 9 position in the X-axis direction, and in accordance with the program stored in the control device 11 one pixel at a time in two directions from the two directions in the Y-axis direction. The luminance for each pixel coordinate is measured while being shifted, and the position within the same luminance difference range is set as the temporary edge 9 position in the Y-axis direction, and the luminance difference range as the temporary edge 9 position in the X-axis direction and the temporary position in the Y-axis direction The same luminance difference threshold value is set in the X-axis direction and the Y-axis direction from the luminance difference range at the edge 9 position, and the luminance difference threshold value is detected. Setting to recognize the boundary of the edge 9 located between the white parts 7 and the black portion 8.

  With the obtained camera 6 element setting and illumination element setting, the luminance difference between the white portion 7 and the black portion 8 has the same luminance difference as when the measurement object 5 is changed. By setting the brightness difference threshold value, the position of the edge 9 of the measurement object 5 can be detected accurately and reliably even if the measurement object 5 changes, and its pixel coordinates can be detected.

  Next, the pixel coordinate actual size conversion means will be described. First, one calibration plate 30 having a size that covers at least the range imaged by the camera 6 is placed on the stage 20 of the imaging device 4. For example, as shown in FIG. 4, the calibration plate 30 has a square composed of a white portion 7 having a side length of 1 mm and a square composed of a black portion 8 having a side length of 1 mm. They are arrayed alternately in the Y-axis direction. Since the edge 9 position which is the boundary between the white portion 7 and the black portion 8 exists every 1 mm, if the edge 9 position is measured, the pixel coordinates every 1 mm in the X-axis direction and the pixel coordinates every 1 mm in the Y-axis direction are obtained. I can grasp.

  However, the image picked up by the camera 6 due to the aberration of the lens 15 becomes “pincushion type” as shown in FIG. 5 (however, only the position of the edge 9 is represented), or FIG. The pixel coordinates on the image are always constant in both the X-axis direction and the Y-axis direction, as shown in FIG. Therefore, while the length of each side of the square of the calibration plate 30 is 1 mm, the number of pixels indicating the length of each side of the square on the image differs depending on the position on the image.

  For example, FIG. 7 shows an image obtained by placing the measurement object 5 having the same shape and the same size on the stage 20, but when the same measurement location is measured, the object placed in the center of the image is shown. Although the dimension a and the dimension b of the object placed on the edge of the image are the same dimensions, the dimensions differ when measured by the number of pixels on the image.

  Therefore, the actual dimensions for each pixel in the X-axis direction are grasped and stored for each pixel coordinate from the pixel coordinates for each 1 mm in the X-axis direction and the number of pixels between the pixel coordinates. Similarly, the actual dimensions for each pixel are grasped and stored for each pixel coordinate in the Y-axis direction.

  The pattern registration means recognizes and registers the shape, size, and angle of the measurement object 5 serving as a reference as shown in FIG. 8, for example.

  The design value information storage means registers and stores measurement objects such as measurement points, lengths, angles, radii, and diameters of the measurement object 5 as a reference as shown in FIG. 8 in advance. This makes it possible to instantaneously measure the measurement values such as the length and angle that you want to measure with respect to the measurement point when measuring the measurement object 5. For example, the lengths c and d in Fig. 8 are stored as measurement points.

  The means for imaging the measurement object 5 is a camera 6 element setting such as shutter speed, aperture, sensitivity and white balance adjustment set in advance, and illumination element setting such as light quantity and light beam direction. Thus, for example, as shown in FIG. 9, the measurement object 5 placed on the stage 20 in an arbitrary direction is imaged.

  The pattern recognition means is placed in any orientation based on the pattern registration information registered and stored in advance, regardless of the orientation of the measurement object 5 placed on the stage 20. Search and recognize which registered object 5 has the registered shape.

  The measuring object dimension measuring means acquires the measurement position on the screen based on the measurement instruction information of the specified measurement object 5, and based on the edge position setting, the pixel coordinates of the edge 9 position corresponding to the measurement position on the screen are obtained. Based on the detected pixel coordinates and based on the pixel coordinate actual dimension conversion data, the length and angle are converted and displayed.

  Therefore, the camera element setting value and the lighting element setting are performed in advance, the actual dimensions for each pixel coordinate are grasped and stored, and the pattern such as the shape and size of the object to be measured and the location to be measured are registered and stored. Then, as shown in FIG. 9, when a plurality of measurement objects 5 are placed on the stage 20 and a measurement start button (not shown) of the dimension measuring device 1 is pressed, measurement of the plurality of measurement objects 5 is instantaneously performed. The value is displayed on the monitor 10. For example, if the lengths c and d as shown in FIG. 8 are registered as measurement points, the length c of each measurement object 5 is measured even when the measurement objects 5 are placed in different directions as shown in FIG. , D are measured instantaneously and displayed on the monitor 10.

  Next, the dimension measurement process will be described with reference to the flowcharts of FIGS. First, the setting step S101 of the dimension measuring apparatus 1, the registration step S102 of the measurement object 5 serving as a reference, and the measurement step S103 are performed in this order. In the apparatus setting step S101, step S1 for setting and registering the position of the edge 9 is performed, and then step S2 for obtaining and registering the actual dimension for each pixel coordinate is performed. In the registration step S102 for the measurement object 5 serving as a reference, Step S3 for registering a pattern such as the shape of the measurement object serving as a reference, and Step S4 for registering design value information such as a measurement point of the measurement object serving as a reference are performed. Step S5 for storing the measured image of the measurement object 5, step S6 for pattern recognition by comparing the captured image with the registered information, and conversion from pixel coordinates on the image of the measurement object 5 to obtain the actual dimensions. Step S7 is performed in which the actual size is acquired and displayed on the monitor 10 and recorded in the computer of the control device 11.

  The setting step S101 of the dimension measuring apparatus 1 includes a program for determining the edge position of the boundary between the white portion 7 and the black portion 8 for measuring an actual measurement value of the measurement object 5 from an image, a pixel of the program of the control device 11 and a pixel. This is a step of storing an actual size conversion program per pixel for each coordinate.

  Step S1 is an edge position setting step. First, a calibration plate 30 having, for example, a white portion 7 and a black portion 8 as shown in FIG. 2 on the stage 20 on which the measurement object 5 is placed is a boundary between the white portion 7 and the black portion 8. The edge 9 is placed so that the direction thereof is parallel to the X axis or the Y axis.

  Next, in the calibration plate 30 image captured by the camera 6 and displayed on the monitor 10, the shutter speed and aperture are set so that the white portion 7 and the black portion 8 have the same size as shown in FIG. Camera element settings such as sensitivity and white balance adjustment, and illumination element settings such as the amount of light and the direction of light rays so as not to cause unevenness in the brightness and illuminance of illumination within the image range, the camera element setting data and the The lighting element setting data is stored in the program of the control device 11.

  Next, in the image, the luminance for each pixel coordinate is measured while shifting by one pixel in each of the two directions from the two directions in the X-axis direction, and the position within the same luminance difference range is set as the provisional edge 9 position in the X-axis direction. Further, the luminance for each pixel coordinate is measured while shifting by one pixel in each of the two directions from the bidirectional direction in the Y-axis direction, and the position within the same luminance difference range is set as the temporary edge 9 position in the Y-axis direction. The same luminance difference threshold value is set in the X-axis direction and the Y-axis direction from the luminance difference range that becomes the temporary edge 9 position in the direction and the luminance difference range that becomes the temporary edge 9 position in the Y-axis direction. The white portion 7 in the calibration plate 30 image captured by the camera 6 according to a program for recognizing the position where the threshold is detected as the edge 9 position of the boundary between the white portion 7 and the black portion 8. Storing the luminance difference threshold edge 9 position is a boundary between the black portion 8.

  Step S2 is a step of obtaining and registering actual dimensions for each pixel coordinate. This is a step of storing the actual dimensions for each pixel in the program of the control device 11 for each pixel coordinate even if the image captured by the camera 6 due to the aberration of the lens 15 becomes a pincushion type or a barrel type.

  The pixel coordinates for each 1 mm in the X-axis direction in the image are detected according to the brightness difference threshold program at the edge 9 position, and the number of pixels constituting the 1 mm interval is calculated from the pixel coordinate difference for each 1 mm. One calibration with a size that covers at least the range imaged by the camera 6 in accordance with a program that calculates and stores the actual size of each pixel in the X-axis direction for each pixel coordinate by dividing 1 mm by the number of pixels. The actual size for each pixel is calculated for each pixel coordinate in the X-axis direction using the plate 30 and stored in the program of the control device 11.

  For the Y axis, the actual dimensions for each pixel are calculated for each pixel coordinate in the Y axis direction and stored in the program of the control device 11 in the same manner as the X axis.

  Next, the registration step S102 of the reference measurement object 5 is a step S3 in which a pattern such as the shape of the reference measurement object 5 is previously registered in the program of the control device 11, and the reference measurement object In step S4, design value information such as measurement points and lengths of the object 5 is registered in advance.

  In step S3, according to the program for recognizing the shape, size, and angle of the measurement object 5 serving as a reference, the measurement object 5 serving as the reference placed on the stage 20 is pattern-recognized and the control device 11 Remember to program.

  Step S4 stores design value information such as the measurement point of the measurement object 5, the length, the angle, the radius, and the diameter at the measurement point for each pattern of the measurement object 5 serving as a reference stored in the pattern recognition program. The design value information is stored in the program of the control device 11 for each pattern of the measurement object 5 according to the program to be measured.

  Next, the measurement step S103 is a step of measuring the measurement object 5 placed on the stage 20 of the imaging device 4 at an arbitrary position and orientation, and includes the data stored in steps S1 to S4. Then, in accordance with the program of the control device 11, the captured image of the measurement object 5 is stored in step S5, the pattern of the measurement object 5 is compared with the registration information, and the pattern recognition is performed in step S6. This is the step in which step S7 is performed in which the actual dimensions are obtained by conversion from the pixel coordinates on the image, the actual dimensions are displayed on the monitor 10, and recorded in the computer of the control device 11.

  In step S5, the measurement target imaged using the imaging device 4 set according to the camera element setting data stored in the program in step S1 and the program for automatically setting the imaging device 4 with the illumination element setting data. An image of the object 5 is stored.

  In step S6, the edge 9 position of the image is read with the brightness difference threshold value of the edge 9 position stored in the program in step S1 for the captured and recorded image, and the measurement object 5 is read from the read edge 9 position. The shape and size of the image is grasped, a pattern in which the shape and size of the grasped image matches the pattern recorded in step S3 is searched, and imaging is performed according to a program for specifying the pattern of the measurement object 5 The pattern of the measuring object 5 that is arbitrarily placed on the stage 20 of the apparatus 4 is specified and recorded.

  In step S7, the measurement point of the measurement object 5 for each pattern of the measurement object 5 recorded in the program in step S4, design value information such as length, angle, radius and diameter at the measurement point, and in step S1 Based on the luminance difference threshold value of the edge 9 position stored in the program, the edge 9 position such as the length, angle, radius and diameter of the measurement point of the image is read in pixel coordinates, and each pixel coordinate recorded in step S2 In accordance with a program that calculates actual size values such as the length, angle, radius, and diameter of the measurement point based on the actual size conversion data per pixel, and displays them on the monitor 10 and records them in the computer of the control device 11 When the actual size value of the measurement point of the measurement object 5 placed on the stage 20 is calculated and displayed on the monitor 10 Recorded in the control unit 11 of the computer as well.

DESCRIPTION OF SYMBOLS 1 Dimension measurement apparatus 2 Image processing apparatus 3 Illumination power supply apparatus 4 Imaging apparatus 5 Measuring object 6 Camera 7 White part 8 Black part 9 Edge 10 Monitor 11 Control apparatus 15 Lens 20 Stage 21 Transmitted illumination part 22 Each axis adjustment function part 30 Calibration Plate

Claims (3)

An apparatus for measuring a dimension of a measurement object from an image by an imaging means having a lens,
The edge position that is the boundary parallel to the X-axis or Y-axis between the white portion and the black portion of one calibration plate having a size exceeding the range to be imaged can be seen from both the X-axis and Y-axis on the image. Edge position setting means for performing camera element settings such as shutter speed, aperture, sensitivity, and white balance adjustment, and illumination element settings such as the amount of light and the direction of light rays so that the respective pixel coordinates coincide from both axes. When,
And the calibration edge positions of each unit plate dimensions measured in pixel coordinates, pixel coordinates actual dimensions conversion means for storing the conversion data obtained by converting the actual dimensions for each of the pixel coordinates on the image by the imaging means,
Pattern registration means for recognizing and registering the shape, size and angle of the reference measurement object; and
Measurement points, the length of the measurement object serving as the reference, the angle, and the design value information storage means for storing design values information that identifies the measured object, such as a radius and diameter,
It means for imaging the measurement object,
And pattern recognition means for a particular said measurement object on the basis of the measurement object from said image of the captured pattern registration pattern registration information by the registration means,
Get the measurement position by the measurement instruction information for that the measurement object, based on the set set to detect the pixel coordinate of the edge position corresponding to the measurement position by the edge setting means, the pixel coordinate actual size A dimension measuring apparatus comprising: a measuring object dimension measuring unit that acquires an actual dimension from the pixel coordinates of the edge position based on data stored in the conversion unit . A method for measuring a dimension of an object to be measured from an image by an imaging means having a lens,
The edge position that is the boundary parallel to the X-axis or Y-axis between the white portion and the black portion of one calibration plate having a size exceeding the range to be imaged can be seen from both the X-axis and Y-axis on the image. Edge position setting process for performing camera element settings such as shutter speed, aperture, sensitivity, and white balance adjustment, and illumination element settings such as the amount of light and the direction of light rays so that the respective pixel coordinates coincide from both axes. When,
And the calibration edge positions of each unit plate dimensions measured in pixel coordinates, pixel coordinates actual dimensions converted step which stores conversion data in terms of actual dimensions for each of the pixel coordinates on the image by the imaging means,
A pattern registration process for recognizing and registering the shape, size and angle of the reference measurement object;
Measurement points, the length of the measurement object serving as the reference, the angle, and the design value information storing step of storing the design value information for specifying a measurement target such as a radius and diameter,
A step of imaging the measurement object,
A pattern recognition process for a particular said measurement object on the basis of the measurement object from said image of the captured pattern registration pattern registration information by the registration means,
Get the measurement position by the measurement instruction information for that the measurement object, based on the set set to detect the pixel coordinate of the edge position corresponding to the measurement position by the edge setting means, the pixel coordinate actual size A dimension measuring method comprising: a measuring object dimension measuring step for acquiring an actual dimension from the pixel coordinates of the edge position based on data stored in the conversion means . A program for an apparatus that causes a computer to measure the size of an object to be measured from an image by an imaging means having a lens,
The edge position that is the boundary parallel to the X-axis or Y-axis between the white portion and the black portion of one calibration plate having a size exceeding the range to be imaged can be seen from both the X-axis and Y-axis on the image. Edge position setting procedure for performing camera element settings such as shutter speed, aperture, sensitivity, and white balance adjustment, and illumination element settings such as the amount of light and the direction of light rays so that the respective pixel coordinates coincide from both axes When,
And the calibration edge positions of each unit plate dimensions measured in pixel coordinates, the pixel coordinate actual dimensions in terms procedure storing conversion data in terms of actual dimensions for each pixel coordinates on the image by the imaging means,
A pattern registration procedure for recognizing and registering the shape, size and angle of the reference measurement object,
Measurement points, the length of the measurement object serving as the reference, the angle, and the design value information storing procedure for storing the design value information for specifying a measurement target such as a radius and diameter,
A procedure for imaging the measurement object ;
A pattern recognition procedure for specific the object to be measured based on the measurement object from said image of the captured pattern registration pattern registration information by the registration means,
Get the measurement position by the measurement instruction information for that the measurement object, based on the set set to detect the pixel coordinate of the edge position corresponding to the measurement position by the edge setting means, the pixel coordinate actual size A computer program for causing a dimension measuring apparatus to execute a procedure including a measuring object dimension measuring procedure for acquiring an actual dimension from pixel coordinates of the edge position based on data stored in a conversion means .

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