JPH09189521A - Dimension measurement method and device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily align the position of a cursor and at the same time improve measurement accuracy when aligning the cursor to both edges of an image to be measured which is displayed, and calculating the dimension of the object to be measured. SOLUTION: Wide parts 9-12 with a wide width are provided on the line of cursors 7 and 8 which are displayed for measuring dimensions and the center of the wide parts 9-12 is aligned to the image edge of an image 6 to be measured to measure the dimensions. Or, two sets of cursors 13/14 and 15/16 are provided and the set of cursors are moved to both edges of the image 6 to be measured, position is aligned so that the image edge of the image 6 to be measured comes to the center of the set of cursors, and a dimension is calculated by using the distance value between the center of the set of cursors 13 and 14 and the center of the sets of the other cursors 15 and 16.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dimension measuring method and a dimension measuring apparatus, and more particularly to a dimension measuring method and apparatus having improved measurement workability during manual measurement.

[0002]

2. Description of the Related Art In the conventional measuring method, first, an object to be measured is magnified with a microscope and an enlarged image thereof is displayed on a CRT screen. On this CRT screen, two lines that can be moved left and right are drawn in advance in the vertical direction, and this is called a cursor. The operator, for both ends of the dimension measurement point of the image on the screen,
Align the positions of the two cursors.

Here, the distance between the two cursors is calculated in the apparatus and used as the dimension of the object to be measured. At this time,
In the case of a manual method for aligning the cursor with the measurement position, while looking at the image of the measurement object projected on the screen,
Move the cursor using the operation part of the device, etc., and visually superimpose it on the edge of the image.

[0004]

When the cursor is aligned with the edge of the image, the cursor must be placed directly above the edge of the image. However, this cursor is formed by a thin dotted line and has a width of about 1 mm, and since it is provided through the top and bottom of the screen, the image end is hidden under the cursor when the cursor is aligned with the image end. It is difficult to determine whether the cursor is correctly on the image edge.

Such a cursor is visually inconvenient.

[0006]

DISCLOSURE OF THE INVENTION The present invention is directed to a dimension measurement in which linear cursors are placed at both ends of an image of an object to be measured displayed as an image and the dimension of the object to be measured is calculated using the distance value between the cursors. In the method and the apparatus therefor, dimension measurement is performed by aligning the center of the wide portion having a wide line width provided on the cursor line with the image edge of the measurement object, or
Two sets of cursors are provided, the cursor sets are moved to both ends of the measurement object image, and the alignment is performed so that the image end of the measurement object is located at the center of the cursor set. The dimension is calculated using the distance value between the center of the cursor and the center of the other cursor set.

[0007]

Embodiments of the present invention will be described below with reference to the drawings. First Embodiment FIG. 1 is an explanatory view showing the present embodiment, and FIG. 2 is a simplified block diagram of a dimension measuring device.

The configuration of the dimension measuring apparatus 1 of the present embodiment will be described with reference to FIG. Reference numeral 2 is an image pickup means such as a microscope, which picks up an image of a measurement object and outputs a signal corresponding to the image. Reference numeral 3 denotes a display unit, which is composed of a display such as a CRT or a liquid crystal, and displays an image of a measurement object, a cursor described later, and various information as an image. Reference numeral 4 denotes an operation means, which is composed of, for example, a trackball or other pointing device, a keyboard, and the like, and accepts the operation of the operator. Reference numeral 5 is a control means for controlling and functioning each of the above means.

When operating the dimension measuring apparatus 1 having the above-mentioned configuration, first, the image pickup means 2 images the measurement object which is the object of dimension measurement. The image pickup means 2 sends a signal corresponding to the obtained image to the control means 5. The control means 5 causes the image of the measuring object to be displayed on the screen of the display means 3 based on the signal. A cursor, which will be described later, is also displayed on the display means 3.

The operator operates the operation means 4 to move the cursor while looking at the display means 3. Control means 5
Moves the cursor displayed on the display means 3 in accordance with the operation content output from the operation means 4. The operator can appropriately operate the operation means 4 to adjust the image of the measuring object. After the operator aligns the cursor with both ends of the image of the object to be measured, the control means 5 calculates the cursor interval from the positions of both cursors, and obtains the dimension based on the information such as the cursor interval and the imaging magnification, that is, both ends of the object to be measured. Calculate the dimension between.

The control means 5 displays the calculation result on the display means 3 or outputs it to a recording means, a printer or the like (not shown). The present embodiment is characterized in that the cursor displayed on the display means 3 is provided with a wide portion, which will be described in detail below. FIG. 1 shows the measurement object image 6 and the cursors 7 and 8 of the present embodiment displayed on the display means 3. As shown in FIG. 1, the cursors 7, 8
Is displayed in a state where it is pulled vertically, for example,
By operating the operating means 4, it is possible to move in the left-right direction in the example of this drawing.

Although the cursor 7 is linear, the width thereof is partially widened to form a wide portion 9 and a wide portion 10.
The thin line portion of the cursor 7 is, for example, a broken line, and the wide portions 9 and 1
It is advisable to leave a gap between them and 0. The wide portions 9 and 10 are properly divided into two by the center line of the cursor 7 in the length direction. Similarly, the cursor 8 has a wide portion 11 and a wide portion 12.

The wide portions 9 to 12 have an optimum width for positioning as will be described later when compared with the line at the image end of the measurement object image 6. For example, this width is about 3.0 mm. Also, the vertical lengths of the wide portions 9 to 12 in the figure must be set optimally when positioning, and for that purpose, the lateral width of the wide portions 9 to 12 is visually emphasized. To do. For example, the vertical length of the wide portions 9 to 12 may be set to about 10.0 mm.

The wide portion 9 and the wide portion 10 are movable in the length direction of the cursor 7, that is, in the vertical direction in this example,
The interval between the wide parts 9 and 10 can be freely set,
The operator operates the operation means 4 so that the operator can set the position to any position. Similarly, the wide portion 11
And the wide part 12 are also movable in the vertical direction, and the wide parts 11, 1
The interval of 2 can be set freely.

As described above, the wide portions 9 and 10 are moved to the cursor 7
Although it can be moved up and down, the relative positional relationship with the cursor 7 in the left-right direction is fixed. Even when the cursor 7 moves, the cursor 7 always moves together with the relative positional relationship with the cursor 7 fixed. The same applies to the relationship between the wide portions 11 and 12 and the cursor 8. That is, the wide portions 9 to 12 do not move in the left-right direction by themselves.

Further, the vertical movement of the wide portions 9-12 is as follows.
The upper and lower comrades work together. That is,
The wide part 9 and the wide part 11 form one set and move up and down by the same amount at the same time, and the wide part 10 and the wide part 12 form one set and move up and down by the same amount at the same time. In addition, the cursor 7,
The thin line portions other than the wide portions 9 to 12 of 8 are not limited to the broken lines as shown in the figure, and any line type may be used as long as a gap is provided between the narrow portions and the wide portions 9 to 12.

When the measurement is performed, first, the left and right cursors 7 and 8 are respectively aligned with both ends of the measurement object image 6 displayed on the screen. Specifically, this alignment is first performed by roughly aligning the cursors 7 and 8 with the image edge, and further, the wide portions 9 to 12 are all located directly above the image edge, and the lines at the image edge are second class. Align to be divided. At that time, the thin line portions of the cursors 7 and 8 and the wide portions 9 to 1
Since the image end can be visually recognized from the gap between the two, the line of the image end and the wide portions 9 to 12 can be visually recognized and closely matched.

Further, as described above, the wide portion 9 on the upper side,
Since the reference numeral 11 is interlocked with each other, and the wide portions 10 and 12 on the lower side are interlocked with each other, they are set by appropriately moving up and down according to the size and shape of the image 6. . As a result, if the wide portions 9 to 12 of the cursor are bisected at the image end line at all positions, the alignment of the cursors 7 and 8 is completed in that state.

Then, the control means 5 calculates the cursor interval from the positions of the two cursors 7 and 8, and calculates the dimension from the information on the cursor interval and imaging / magnification.
As described above, in the present embodiment, by providing the wide portions 9 to 12 on the cursors 7 and 8, the work of placing the cursor directly above the image end line of the measurement target image 6 is visually effective. It becomes possible to perform it easily and accurately.

Further, since each cursor is provided with a plurality of wide portions, it is possible to confirm the verticality of the measurement object image 6 itself within the screen, and it is possible to perform more accurate measurement. For example, when the verticality of the measurement object image 6 is poor, the operator can operate the operating means 4 to correct the image 6 so that it is vertical. Furthermore, by making the wide portions 9 to 12 movable in the length direction of the cursors 7 and 8, the wide portions 9 to 12 are placed at the optimum positions regardless of the state of the size or shape of the measurement object image 6. It is possible to set and perform accurate measurement.

Second Embodiment FIG. 2 is a simplified block diagram of the dimension measuring apparatus, and FIG. 3 is an explanatory view showing the present embodiment. First, according to FIG. 2, the dimension measuring apparatus 1 of the present embodiment is shown. The configuration of will be described. Reference numeral 2 is an image pickup means such as a microscope, which picks up an image of a measurement object and outputs a signal corresponding to the image. 3 is a display means,
For example, it is composed of a display such as a CRT or a liquid crystal, and displays an image of an object to be measured, a cursor described later, and various information. Reference numeral 4 denotes an operation means, which is composed of, for example, a trackball or other pointing device, a keyboard, and the like, and accepts the operation of the operator. Reference numeral 5 is a control means for controlling and functioning each of the above means.

When operating the dimension measuring apparatus 1 having the above-mentioned configuration, first, the image pickup means 2 images the measurement object which is the object of dimension measurement. The image pickup means 2 sends a signal corresponding to the obtained image to the control means 5. The control means 5 causes the image of the measuring object to be displayed on the screen of the display means 3 based on the signal. A cursor, which will be described later, is also displayed on the display means 3.

The operator operates the operation means 4 to move the cursor while looking at the display means 3. Control means 5
Moves the cursor displayed on the display means 3 in accordance with the operation content output from the operation means 4. The operator can appropriately operate the operation means 4 to adjust the image of the measuring object. After the operator positions the cursor on both ends of the image of the object to be measured, the control means 5 calculates a desired dimension, that is, a dimension between both ends of the object to be measured, based on information such as the position of the cursor and the imaging magnification.

The control means 5 displays the calculation result on the display means 3 or outputs it to a recording means, a printer or the like (not shown). In the present embodiment, two sets of two cursors to be displayed on the display means 3 are provided, and each set of cursors is made to correspond to the image end of the image of the object to be measured, and the cursor of each set is set at the center of the image end. The feature is that the alignment is performed so that the lines come, which will be described in detail below.

FIG. 3 shows the measurement object image 6 and the cursors 13 to 16 of the present embodiment displayed on the display means 3. The cursors 13 to 16 are displayed, for example, in a vertically drawn state on the screen, and can be moved in the horizontal direction in the example of this drawing by operating the operation means 4. In addition, in the present embodiment, the above-mentioned four cursors are used as two sets of two, one set for the left and one set for the left.
The feature is that the set is arranged for the right side. That is, the set of the cursor 13 and the cursor 14 is used for the left in the figure, and the cursor 15 and the cursor 16 are used for the right.

In the example of the figure, the cursors 13 to 16 are described as solid lines, but they may be of any type such as dotted lines, broken lines or chain lines. Then, the cursor 13-
The width of 16 itself is narrow. This is for example 1.
It is good to set it to about 0 mm or less. At the time of the alignment of the present embodiment, the line of the image end of the measurement object image 6 is made to be in the center of one set of cursors, and thus this cursor interval is optimal for such alignment. Need to be set. For example, the distance between the cursor 13 and the cursor 14 and the distance between the cursor 15 and the cursor 16 may be set to about 3.0 mm in the standard state.

The cursor intervals of each set can be used in a fixed state, but the intervals can also be variable. It is optimal to make the cursor spacing wider or narrower than the standard state depending on the linearity of the measurement object image 6 such as rattling of the image edge, or the appearance of the image. Set it at an appropriate interval before use. That is, the distance between the cursor 13 and the cursor 14,
The distance between the cursor 15 and the cursor 16 can be adjusted independently.

When adjusting the distance between the cursors 13 and 14,
For example, the cursor 14 is moved based on the cursor 13, or the cursor 1 is moved based on the cursor 13.
4 should be moved. The same applies to the adjustment of the intervals between the cursors 15 and 16. When each set of cursors whose distances have been adjusted as described above is aligned with the image end of the measurement object image 6, the cursors are moved in units of each set while maintaining the above-mentioned cursor intervals.

When the measurement is performed, the set of cursors 13 and 14 and the set of cursors 15 and 16 are respectively fitted to both ends of the measurement object image 6 displayed on the screen. First, roughly, the cursor 13 and the cursor 14 are placed. Positioning is performed so that the left end of the measurement target image 6 is accommodated between the cursors and the right end of the measurement target image 6 is accommodated between the cursors 15 and 16.

Here, when the linearity of the image end of the measuring object image 6 is good, the distance between the cursors 13 and 14 and the distance between the cursors 15 and 16 are fixed. And
Positioning is performed so that the line of the left image end is located at the center of the set of cursors 13 and 14 and the line of the right image end is located at the center of the set of cursors 15 and 16 more accurately. When the linearity of the shape of the measuring object image 6 is not good, the cursor interval is measured not by the fixed method but by the variable method. Cursors 13, 14 after rough alignment
The width of the group of is widened or narrowed from the standard state,
Adjust to the optimum interval. Then, in the state in which the distance is maintained, fine adjustment is performed so that the image end of the measurement object image 6 is located at the center of the set of the cursors 13 and 14. Cursor 1
The same applies to the sets of 5 and 16.

It is not necessary that the distance between the cursors 13 and 14 and the distance between the cursors 15 and 16 match, and the width may be set to be suitable for the state of each image end. When the alignment of the cursors is completed, the control means 5 calculates the distance value between the center of the cursors 13 and 14 and the center of the cursors 15 and 16, and measures the dimension of the object to be measured from the distance value and the information on the imaging / magnification. To calculate.

As described above, in the present embodiment, the cursor is set to have two left and right ones, and the positioning is performed so that the image end is located at the center of the set of cursors. Therefore, the cursor alignment is visually easy and accurate. It becomes feasible. In addition, since the left and right cursor sets perform alignment with the interval between the cursors being fixed or variable, accurate measurement can always be performed regardless of the state of the image edge shape.

In the first and second embodiments described above, the measurement is performed by making cursors whose length direction is the vertical direction correspond to the left and right ends of the measurement object image projected in the vertical direction. However, the present invention is not limited to this, and as long as the cursors operate so as to always be parallel in accordance with the directionality of the measurement object image, what kind of measurement object image and cursor should be used? Even if they are arranged in the direction, the present invention can be similarly applied.

Further, in the first and second embodiments described above, an example using a dimension measuring apparatus which projects an image of the object to be measured on the screen and performs alignment using the cursor on the screen is given. However, the present invention is also applicable to a dimension measuring device of a type in which a cursor is directly installed on the eyepiece portion of a microscope for measurement.

[0035]

As described above in detail, the image end of the measurement object image is aligned with the center of the wide portion provided on the cursor, or the measurement object image is aligned with the center of the cursor composed of two pairs. By aligning the image edges, the cursor alignment work can be performed easily and accurately under visually clear conditions, increasing the reliability of dimensional measurement and minimizing measurement errors due to differences in operators. It has the effect that it can be suppressed to a small value.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram showing a first embodiment.

FIG. 2 is a simplified block diagram of a dimension measuring device.

FIG. 3 is an explanatory diagram showing a second embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Dimension measuring device 2 Imaging means 3 Display means 4 Operating means 5 Control means 6 Measurement object image 7,8 Cursor 9,10,11,12 Wide part 13,14,15,16 Cursor

Claims (6)

[Claims] 1. A dimension measuring method in which linear cursors are placed on both ends of an image of a measurement object displayed as an image, and the dimension of the measurement object is calculated using a distance value between the cursors. The dimension measuring method is characterized in that the center of a wide portion having a wide line width is aligned with the image edge of the image of the measuring object to perform dimension measurement. 2. A dimension measuring method of aligning linear cursors on both ends of an image of a measuring object displayed as an image and calculating a dimension of the measuring object using a distance value between the two cursors. Two sets of the cursors are provided, and when the sets of cursors are moved to both ends of the measurement object image, the cursors are aligned so that the image end of the measurement object image is located at the center of the cursor set. A dimension measuring method, wherein the dimension is calculated using a distance value between the center of the pair of cursors and the center of the other pair of cursors. 3. An image pickup means for converting a measurement object into an image with an arbitrary magnification, a display means for displaying an image of the measurement object and a linear cursor, an operation means for accepting an operation of an operator, and In the dimension measuring device that has a control means for controlling each means, and calculates the dimension of the measuring object by using the distance value between both cursors aligned with the image edge of the measuring object image, the line width on the cursor line A dimension measuring device characterized in that a wide and wide part is formed. 4. The cursor according to claim 3, wherein a same number of wide portions are provided on each cursor, each wide portion is made to correspond to a wide portion on another cursor, and a pair of corresponding wide portions are interlocked and are the same. A dimension measuring device characterized in that the distance between the wide portions on the cursor is adjusted according to the state of the image of the measuring object to perform dimension measurement. 5. An image pickup means for converting a measurement object to an arbitrary magnification and picking it up, a display means for displaying an image of the measurement object and a linear cursor, an operation means for accepting an operation of an operator, and In the dimension measuring device which has a control means for controlling each of the means, and calculates the dimension of the measurement object by using the distance value between both cursors aligned with the image end of the measurement object image, A dimension measuring device characterized in that two sets of two cursors corresponding to one end are provided. 6. The dimension measuring apparatus according to claim 5, wherein the distance between the cursors forming a pair is variable, and the distance between the cursors is adjusted according to the state of the image edge of the measurement object to perform dimension measurement. .