JP2637923B2 - Method for correcting stripe pattern direction data and information processing apparatus for executing the same, and method for correcting stripe pattern pitch data and information processing apparatus for executing the same - 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 and an apparatus for correcting direction data of a stripe pattern such as a fingerprint, and more particularly, to a method and an apparatus for correcting direction data according to an instruction of an operator. The present invention also relates to a method and an apparatus for correcting pitch data of a stripe pattern such as a fingerprint, and more particularly, to a method and an apparatus for correcting pitch data according to an instruction of an operator.

[0002]

2. Description of the Related Art When a stripe pattern such as a fingerprint is collated, a process of clarifying the image of the stripe pattern is performed. For example,
In the case of fingerprint matching, an image of an unclear latent fingerprint is clarified. The clarified latent fingerprint image is compared with the reference fingerprint image stored in the database. By clarifying the image of the latent fingerprint, the characteristic points of the latent fingerprint are accurately detected. As a result, the success rate of the matching is improved.

[0003] When clarifying a stripe pattern, data indicating the direction of the stripe pattern (hereinafter referred to as "direction data") is used. The direction data is provided corresponding to each of a plurality of zones dividing the stripe pattern. Based on the direction data, a mask is prepared so that the stripe pattern becomes clear. By filtering the stripe pattern image using this mask, the stripe pattern image is clarified.

[0004] In addition to the direction data, pitch data is also used to clarify a striped pattern image. The pitch data is data indicating a pitch between stripe patterns. By reflecting the pitch data on the anisotropic local two-dimensional filter, it is possible to make the image clearer than when only the direction data is used.

An example of a technique for extracting direction data of a stripe pattern is disclosed in Japanese Patent Publication No. 59-27945 and Japanese Patent Laid-Open Publication No. Hei.
-271885. These publications disclose techniques for automatically extracting the direction of a stripe pattern by moving a search point from a point where the direction should be detected. When the search point moves along the stripe pattern, this technique has a small change in shading of the image at the search point,
The direction of the stripe pattern is extracted by utilizing the phenomenon that the shading changes sharply when moving perpendicular to the stripe pattern.

The pitch data is automatically extracted based on the direction data extracted by the above-described means. More specifically, the pitch data can be obtained by calculating the frequency of the density change of the image in the direction orthogonal to the stripe pattern.

[0007]

As described above, in the prior art, the direction data and the pitch data are automatically extracted from the image of the stripe pattern. However, in the case of an unclear image such as a latent fingerprint, a part of the extracted direction data and pitch data becomes inaccurate. The noise contained in the image and the small difference in shading make it difficult to extract such data.

In the prior art, even if the operator visually detects that the direction data and the pitch data are incorrect, they cannot be corrected. Changing the data of each zone manually requires a great deal of labor.

In view of the above problems, an object of the present invention is to provide a method and an apparatus for correcting direction data and pitch data in accordance with an instruction of an operator.

It is another object of the present invention to reduce the number of times the operator needs to correct the direction data and the pitch data.

It is another object of the present invention to provide a method and an apparatus which enable an operator to easily correct direction data and pitch data.

It is another object of the present invention to provide a method and apparatus capable of obtaining more natural direction data and pitch data after correction.

It is another object of the present invention to provide a method and an apparatus capable of correcting direction data and pitch data at high speed.

[0014]

According to one aspect of the present invention, there is provided a method for correcting directional data in which a direction is given to each of a plurality of regions, wherein at least one of the plurality of regions is corrected. In the step of setting the direction instructed via the input device in the direction of this area, and setting the area in which the direction is set as a fixed area,
Calculating the direction of the region other than the defined region based on the direction of the defined region.

[0015] The direction of the fixed area is defined by a step of designating a line for indicating the direction through the input device, a step of setting an area through which the line passes as a fixed area, and Setting the direction of the line.

It is also possible to set a contour inside a plurality of areas and to correct only the area inside the contour.

The direction of the region Z is determined so as to be closer to the direction of the fixed region located near the region Z. Specifically, the direction D that minimizes the function H is set as the direction of the region Z. The function H for the direction D is obtained by the following procedure.

First, several defined areas Zk (k = 1, 2,...) Located around the area Z are selected. A function h1 that is minimum when the direction D of the region Z and the direction Dk of the region Zk match, and is maximum when they are orthogonal.
k is set. When the distance between the region Z and the region Zk is Rk, a function h2 that decreases as Rk increases
k is set. A function obtained by multiplying h1k by h2k is defined as Hk. The sum of Hk with respect to k is a function H.

The purpose of the pitch data is to determine the pitch Pk (k = 1, 2,...) At one or a plurality of points Ok (k = 1, 2,...) In the stripe pattern.
..) Via an input device, and calculating the pitch of each of the plurality of regions based on the pitch at the point Ok.

When setting the pitch Pk, a circle centered on the point Ok and having the radius of the pitch Pk at the point Ok is displayed on the display device.

It is also possible to set contours in a plurality of regions and calculate the pitch only for the regions within the contours.

The pitch of the area Z is obtained by a weighted average of the pitch Pk. Assuming that the distance between the point Ok and the region Z is Rk, the weight Wk of Pk is set to decrease as Rk increases.

[0023]

Next, a first embodiment of the present invention will be described with reference to the drawings. This embodiment relates to a method and an apparatus for correcting direction data.

FIG. 1A shows an example of image data of a stripe pattern. This stripe pattern is a latent fingerprint. Fingerprint stripes are called ridges. The image data in FIG.
Especially in the left area, it is unclear. FIG. 1B shows the direction data extracted from the image data of FIG. 1A. The direction data is extracted by the above-described conventional technique. In an area where the image data is unclear, the direction indicated by the direction data is incorrect.

Referring to FIG. 2A, the direction data is:
The direction D (i, j) of the stripe pattern in each zone Z (i, j) of the stripe pattern is held. Zone Z (i, j) is an area that divides a stripe pattern. The direction data is in each zone Z
It has a field corresponding to (i, j), and holds the direction D (i, j) in this field. For the sake of simplicity, in the following description, “set a direction in zone Z (i, j)”
Represents that a direction is set in the field corresponding to the zone Z (i, j).

Referring to FIG. 2B, the direction D is 16
Quantized in the direction.

Referring to FIG. 3, the correction device 1 of the present embodiment
0 includes an input unit 11, a processing unit 12, and an output unit 16. The input unit 11 receives image data 1 and direction data 2 from outside. The processing unit 12 corrects the direction data 2 input by the input unit. The processing unit 12 is connected to the display device 4 and the input device 5. An instruction for correcting the direction data 2 is provided from the operator via the input device 5. Since most of the operator's instructions specify coordinates, the input device 5 is preferably provided with a coordinate input device such as a mouse or a tablet. The processing unit 12 displays information necessary for correction on the display device 4. The output unit 16 outputs the corrected direction data 2 to the outside.
The output destination is, for example, a fingerprint collation device. The display device 4 and the input device 5 can be shared with the fingerprint collation device.

The processing section 12 includes a contour setting section 13, a direction setting section 14, and a direction calculation section 15. Contour setting unit 13
Sets an outline of a region whose direction is to be corrected in accordance with an operator's instruction given via the input device 5. The direction setting unit 14 sets the direction D of any one of the zones Z in the direction data 2 in accordance with an operator's instruction given via the input device 5. The zone Z in which the direction D is set by the direction setting unit 14 is called a fixed zone. The direction calculation unit 15 calculates the direction D of the zone Z other than the determined zone using the direction D of the determined zone. Calculated direction D
Is set as the direction of zone Z.

Next, the operation of the present apparatus will be described with reference to the drawings.

Referring to FIG. 4, step 10 is executed by the input unit 11. Steps 11 and 12 are executed by the contour setting unit 13. Steps 13 and 14
Is executed by the direction setting unit 14. Step 15-
Step 17 is executed by the direction calculation unit 15. Step 1
8 is executed by the output unit 16.

In step 10, the input unit 11 inputs image data 1 and direction data 2 from outside.

In step 11, the contour setting unit 13
Displays the image data 1 and the direction data 2 on the display device 4. The contour setting unit 13 displays the direction data 2 on the image data 1. For this reason, the operator can know in which region of the image data 1 the direction data 2 is incorrect.

In step 12, the operator designates the contour C of the area whose direction data is to be corrected. The contour setting unit 13 sets the contour C according to the instruction. Referring to FIG. 5A, the coordinates of each vertex Q1 to Q7 of the contour C are designated by the operator. FIG.
Referring to (b), the input operation is performed on the direction data 2 displayed on the display device 4. On the actual screen, since the image data 1 and the direction data 2 are displayed overlapping,
The designation of the vertices Q1 to Q7 is easy.

In this example, the outline is a polygon determined by the vertices Q1 to Q7, but it may be specified by a closed curve.

Referring again to FIG. 4, in step 13, the direction setting unit 14 displays the image data 1, the direction data 2, and the contour C on the display device 4.

In step 14, the operator specifies the direction indicating line L via the input device 5. The direction instruction line L is a line that indicates the tendency of the direction of each zone. Referring to FIG. 6A, in this case, five direction indicating lines L1 to L5 are input. Referring to FIG. 6B, the input operation is performed on the direction data 2. On an actual screen, the image data 1 and the direction data 2 are displayed in an overlapping manner. The operator follows the displayed stripe pattern,
The direction indicating line L is input. Referring to FIG. 7, each direction indicating line L is a polygonal line composed of a plurality of straight lines LLi. The operator inputs the vertex Qi of the direction indication line L.

Zone Z (i, j) where straight line LLi passes
The direction of the straight line LLi is set in the direction D (i, j). More specifically, of the 16 directions shown in FIG. 2B, the direction closest to the direction of the straight line LLi is the direction D (i,
j). The direction of the straight line LLi can be easily calculated from the coordinates of the end points of the straight line.

In this example, the direction indicating line is the polygonal line zone Z determined by the vertex Qi, but it may be specified by a curve. In this case, the zone Z through which the curve passes
In the direction D (i, j) of (i, j), the curve
Can be easily calculated from the coordinates of two points crossing the outer circumference of.

Referring again to FIG. 4, in step 15, zone Z in which the direction was not set in step 14
The direction D (i, j) of (i, j) is calculated.

Referring to FIG. 8, step 15 includes steps 151 to 156.

In step 151, variables i and j are initialized.

In step 152, the zone Z (i,
It is determined whether or not j) is located within the contour line C. Step 157 when the zone Z (i, j) is not within the contour line C
Is executed. When the zone Z (i, j) is within the contour C, step 153 is executed.

In step 153, the zone Z (i,
It is determined whether or not j) is a fixed zone. Zone Z (i,
When j) is the defined zone, step 157 is executed. If the zone Z (i, j) is not a fixed zone, step 154 is executed.

In step 154, directions D1 to D8
Is required. The directions D1 to D8 correspond to the zones Z (i, j).
In the directions of eight zones Z1 to Z8.

Referring to FIG. 9, among Z1 to Z8, Z1
Is a confirmed zone first encountered when the search point is moved upward from the zone Z (i, j). If the zone through which the boundary C passes before reaching the defined zone, this zone is Z1. More specifically, referring to FIG. 10, the method for selecting the zone Z1 is as follows:
1-1545.

In step 1541, the variables m and n
Are substituted for the values of the variables i and j.

In step 1542, 1 is subtracted from n. This corresponds to moving the search point (m, n) upward.

In step 1543, the zone Z
It is determined whether (m, n) is a fixed zone. Zone Z
When (m, n) is the defined zone, step 1545 is executed. If the zone Z (m, n) is not a fixed zone, step 1544 is executed.

In step 1544, zone Z
It is determined whether or not the contour line C passes through (m, n). When the contour C passes through the zone Z (m, n), step 1545 is executed. When the contour line C does not pass through the zone Z (m, n), step 1542 is executed.
Is executed.

At step 1545, zone Z
(M, n) is selected as Z1. As a result, D (m, n) which is the direction of zone Z (m, n) is set to D1 which is the direction of zone Z1.

The method of selecting zones 2 to 8 is almost the same as that of zone Z1 described above. The difference is only the moving direction of the search point. In selecting zones 2 to 8, the search point moves to the upper left, lower left, lower left, lower, lower right, right, and upper right. In this example, eight fixed zones in the vicinity are used, but the number of fixed zones to be referred to is not limited to eight.

Referring again to FIG. 8, in step 155, the direction D that minimizes H shown in equation (2) is determined. The direction D that minimizes H is denoted as Dmin.

[0053]

[0054]

[0055]

H in the equation (2) has the following meaning. Formula H
Is the weighted average of hk. The weight Wk of each hk is 1 / R
It is a k ^2. Rk is defined as zone Z (i, j) and zone Zk
(K = 1 to 8). hk is a function that becomes minimum when the direction D and the direction Dk match, and becomes maximum when they are orthogonal. hk minimum direction D
Is equivalent to finding a direction in which the difference from Dk is as small as possible.

In order to calculate the natural direction D, when the zone Z (i, j) and the zone Zk are approaching, the direction D of the zone Z (i, j) and the direction Dk of the zone Zk are almost equal. Preferably they match. When Z (i, j) and Zk are separated, there is no problem even if D and Dk differ to some extent. The direction Dmin that minimizes H satisfies such a requirement. That is, the correlation between the direction of the fixed zone located near the zone Z (i, j) and the direction D (i, j) of the zone Z (i, j) is high, and Z (i, j) increases as the distance between the two increases. j) and D (i, j) have a low correlation.

The direction Dmin is calculated according to the following procedure.
H is calculated for each of the 16 directions shown in FIG. As a result of the calculation, the direction in which H becomes the minimum is Dmi.
n. That is, Dmin is obtained by only 16 calculations.

Referring again to FIG. 8, at step 157, Dmin obtained at step 156 is substituted for the direction D (i, j) of zone Z (i, j). Thereby, the direction D (i, j) of the zone Z (i, j) is corrected.

In step 158, the variables i and j are updated. For example, as shown in FIG. 8B, the variables i and j are updated so that the zone Z (i, j) raster-scans the entire direction data 2.

At step 158, all zones Z
It is determined whether or not the process has been completed. If there are unprocessed zones, step 152 is executed again. When the processing is completed for all the zones, step 16 in FIG. 4 is executed. Referring to FIG. 4 again, in step 16, the direction calculation unit 15 displays the corrected direction data 2 on the display device 4.

In step 17, the operator instructs whether or not to make a correction again. If the operator is dissatisfied with the direction data 2 displayed in step 16, the operator performs the correction again. When re-correction is instructed, step 1
3 is executed again. If no re-correction is instructed, step 18 is executed.

In step 18, the output unit 16 outputs the direction data 2 to the outside.

FIG. 11 shows the direction data 2 corrected by the above-described method. Compared with the one before correction shown in FIG. 1B, the direction of the zone inside the boundary line C is corrected. The corrected direction is continuously changing and natural.

As described above, according to the method of the present embodiment, when some of the direction data 2 automatically extracted is incorrect, it can be corrected in accordance with the instruction of the operator. The direction data 2 of the zone can be corrected only by specifying a few direction indicating lines L. Since it is easy to visually determine which direction indicating line L is effective, setting of the direction indicating line L is easy. Since the direction of the undetermined zone is obtained based on the equation (2), the corrected direction data 2 is continuous and natural. Further, since Dmin that minimizes the expression (2) is obtained by 16 calculations, this method can be executed at high speed.

A modification of the above embodiment will be described. In the above embodiment, the direction of the zone inside the boundary line C is corrected. However, it is also possible to correct only the direction of the zone near the direction indicating line L without setting the boundary line C.

Next, a second embodiment of the present invention will be described with reference to the drawings. The present embodiment relates to correction of pitch data.

FIG. 12A shows the image of FIG. 1A and the pitch data extracted from this image in an overlapping manner.

Referring to FIG. 13, pitch data holds pitch P (i, j) corresponding to each zone Z (i, j). Referring again to FIG. 12A, the length of the bar in the figure indicates the pitch of the stripe pattern. The bar line points in a direction perpendicular to the stripe pattern. FIG. 12B shows only the pitch data of FIG. 1A. In the upper left area, the pitch data is incorrect. It is an object of this embodiment to correct such inaccurate pitch data.

Referring to FIG. 14, the correction device 20 of the present embodiment includes an input unit 21, a processing unit 22, and an output unit 26. The input unit 21 receives image data 1 and pitch data 7 from outside. The processing unit 12 corrects the input pitch data 7. The display device 4 and the input device 5 are connected to the processing unit 22. An instruction for correcting the pitch data 7 is provided from the operator via the input device 5. Many of the operator's instructions are designation of coordinates. For this reason, it is preferable that the input device 5 includes a coordinate designation device such as a mouse or a tablet. Information necessary for the operator's instruction is displayed on the display device 4. The output unit 26 outputs the pitch data 7 corrected by the processing unit 22.
Is output to the outside. The output destination of the pitch data 7 is, for example, a fingerprint collation device. Display device 4 and input device 5
Can be shared with an external device used with the present invention, such as a fingerprint collation device.

The processing section 22 includes a contour setting section 23, a pitch setting section 24, and a pitch calculation section 25. The contour setting unit 23 sets the contour of the area to be corrected in the pitch data 7 according to an instruction of the operator given via the input device 5. The pitch setting unit 24 sets pitches Pk at some points Ok in the image data 1 according to an instruction of an operator given the input device 5. The pitch calculator 25 calculates the pitch P (i, j) of each zone Z (i, j) of the pitch data 7 based on the pitch Pk.

Next, the operation of this embodiment will be described.

Referring to FIG. 15, step 20 is executed by input unit 21. Steps 21 and 22
This is executed by the contour setting unit 23. Steps 23 and 2
Step 4 is executed by the pitch setting unit 24. Step 2
Steps 5 to 27 are executed by the pitch calculator 25. Step 28 is executed by the output unit 26.

In step 20, the input section 21 inputs image data 1 and pitch data 7 from outside.

At step 21, the processing section 22 displays the image data 1 and the pitch data 7 on the display device 4. As shown in FIG. 12A, the image data 1 and the pitch data 7 are displayed in an overlapping manner. For this reason, the operator can know in which area of the image data 1 the pitch data 7 is incorrect.

In step 22, the operator designates the contour C of the area in the pitch data 7 that needs to be corrected. The outline setting unit 23 stores the specified outline C. Referring to FIG. 16A, the vertices Q1 to Q5 of the contour C are designated by the operator. FIG.
Referring to (b), the input operation is performed on the pitch data displayed on the display device 4. Since the image data 1 and the pitch data 7 are displayed in an overlapping manner on the actual screen, the designation of the vertex Qi is easy.

In this example, the outline is a polygon determined by the vertices Qi, but it may be specified by a closed curve.

On the actual input screen, the coordinates of the vertex Qi are specified on the direction data 2 as shown in FIG. 16B, so that the contour C can be easily specified.

In step 23, the pitch setting unit 24
Displays the image data 1, the pitch data 7, and the contour line C on the display device 4.

In step 24, the pitch circle PCk (k =
1, 2, ...) are designated. Operator is pitch circle PC
The position is determined by the center point Ok of k and the radius R of the pitch circle PCk.
The pitch of the stripe pattern at the point Ok can be designated by k. Referring to FIG. 17, pitch circle PCk is specified in the following procedure. First, the cursor is positioned on the ridge line G2. In this state, a point Ok is designated by pressing a predetermined button. Next, when the cursor is moved, a pitch circle PCk centering on the point Ok and passing through the position of the cursor is displayed. The cursor is moved so that the pitch Pk circle contacts the ridge G3 adjacent to G2.
By pressing a predetermined button in this state, the pitch circle PCk is specified. At the same time, the radius Rk of the pitch circle PCk is also specified. Any number of pitch circles PCk can be specified. The number of pitch circles PCk is denoted by N.

Referring to FIG. 18, in this case, PC1 to PC1
6, six pitch circles PCk are designated. FIG.
Referring to (b), the designation of the pitch circle PCk is performed on the displayed pitch data 7. Since the image data 1 is also displayed on the actual input screen, it is easy to specify the pitch circle PCk.

Referring again to FIG. 15, in step 25, the pitch calculator 25 calculates the pitch P (i, j) of each zone Z (i, j).

Referring to FIG. 19, step 25 includes steps 251 to 256.

At step 251, variables i and j are initialized.

In step 252, the zone Z (i,
It is determined whether or not j) is located within the contour line C. If the zone Z (i, j) is not located within the contour C, step 255 is executed. Zone Z (i, j) is contour line C
If so, step 253 is performed.

In step 253, the pitch P is calculated based on the following equation (3).

[0087]

In the equation (3), Rk is the distance between the center point Ok of the pitch circle PCk and the zone Z (i, j).
Equation (3) is a weighted average of Pk. The weight of each Pk is 1
/ Is Rk ^2. Equation (3) has the following meaning. In order for the corrected pitch to be continuous and natural, the pitch P (i, j) of the zone Z (i, j) needs to be substantially equal to the pitch Pk of the adjacent pitch circle PCk. On the other hand, the pitch P (i, j) and the zone Z (i, j)
The correlation between the pitch circle PCk far from j) and the pitch Pk is low. Equation (3) satisfies such a constraint.

In step 254, P becomes P (i,
j). That is, the pitch P (i, j) of the zone Z (i, j) is corrected.

In step 255, i and j are updated. As shown in FIG. 8B, the zone Z (i,
i and j are updated so that j) raster-scans the entire pitch data 7.

Referring again to FIG. 19, step 256
In, it is determined whether the processing has been completed for all zones. If there are any unprocessed zones, step 252 is executed again. When the processing has been completed for all the zones, step 26 in FIG. 15 is executed.

Referring to FIG. 15, in step 26, pitch calculating section 25 displays corrected pitch data 7 on display device 4.

In step 27, the operator instructs whether or not to make a correction again. If the operator is dissatisfied with the pitch data 7 displayed in step 26, the operator performs the correction again. When re-correction is instructed, step 23 is executed again. If no re-correction has been instructed, step 28 is executed.

In step 28, the output section 26 outputs the pitch data 7 to the outside.

FIG. 20 shows the pitch data 7 corrected by the above-described method. Compared to the one in FIG. 12B, the pitch of the zone inside the contour line C is corrected. The modified pitch is continuously changing,
It is natural.

As described above, according to the method of the present embodiment, if some of the automatically extracted pitch data 7 is incorrect, it can be corrected according to the instruction of the operator. The pitch data 7 of the zone can be corrected only by specifying an arbitrary number of pitch circles PCk. Since it is easy to visually determine which pitch circle PCk is effective, the setting of the pitch circle PCk is easy. Since the pitch of each zone is determined based on the equation (3), the corrected pitch data 7 is continuous and natural.

Next, a modification of the present invention will be described. In the above-described embodiment, the pitch of the zone inside the boundary line C is corrected. However, only the pitch of the zone near the pitch circle PCk may be corrected without setting the boundary line C.

It is more effective to correct the pitch data 7 by the following procedure in which the first embodiment and the second embodiment are combined. First, the direction data 2 is modified according to the method of the first embodiment. The pitch data 7 is extracted from the image data 1 by using the corrected direction data 2. This pitch data 7 is corrected by the method of the second embodiment.

[0099]

As described above, according to the first embodiment of the present invention, when some of the direction data 2 automatically extracted is inaccurate, it is corrected according to the instruction of the operator. can do. Since the correction can be made by designating only a few direction indication lines L, the operation is simple. Since it is easy to visually determine which direction indicating line L is effective, setting of the direction indicating line L is easy. Further, since the direction of the undetermined zone is obtained based on the equation (2), the corrected direction data becomes continuous and natural. Further, Dmin that minimizes H in the equation (2) can be obtained by a simple calculation, so that it can be corrected at high speed.

Further, according to the second embodiment of the present invention, when some of the automatically extracted pitch data 7 is inaccurate, it can be corrected according to the instruction of the operator. Since the correction can be made only by specifying an arbitrary number of pitch circles PCk, the operation is simple. Since it is easy to visually determine which pitch circle PCk is effective, the setting of the pitch circle PCk is easy. Since the pitch of each zone is determined based on the equation (3), the corrected pitch data 7 is continuous and natural.

[Brief description of the drawings]

FIG. 1 is a diagram showing an example of image data 1 and direction data 2.

FIG. 2 is a diagram showing a structure of direction data 2.

FIG. 3 is a block diagram showing the structure of the device according to the first embodiment of the present invention.

FIG. 4 is a flowchart showing the operation of the apparatus of FIG.

FIG. 5 is a view for explaining the operation of a contour setting unit 13;

FIG. 6 is a diagram for explaining the operation of the pitch setting unit 24.

FIG. 7 is a view for explaining a method of specifying a direction specifying line L.

FIG. 8 is a flowchart showing details of step 15 in FIG. 4;

FIG. 9 is a diagram for explaining the operation of the pitch setting unit 24.

FIG. 10 is a flowchart showing details of step 154 in FIG. 8;

FIG. 11 is a diagram showing direction data 2 corrected by the first embodiment.

FIG. 12 is a diagram showing an example of image data 1 and pitch data 7.

FIG. 13 is a view showing the structure of pitch data 7;

FIG. 14 is a block diagram showing the structure of an apparatus according to a second embodiment of the present invention.

FIG. 15 is a flowchart showing the operation of the apparatus of FIG.

FIG. 16 is a view for explaining the operation of a contour setting unit 23;

FIG. 17 is a view for explaining a method of setting a pitch circle PCk.

FIG. 18 is a diagram for explaining the operation of the pitch setting unit 24.

FIG. 19 is a flowchart showing details of step 25 in FIG. 15;

FIG. 20 is a diagram showing pitch data 7 corrected by the second embodiment.

[Explanation of symbols]

 Reference Signs List 1 image data 2 direction data 4 display device 5 input device 6 direction data 7 pitch data 8 pitch data 10 correction device 11 input unit 12 processing unit 13 contour setting unit 14 direction setting unit 15 direction calculation unit 16 output unit 20 correction device 21 input Unit 22 processing unit 23 contour setting unit 24 pitch setting unit 25 pitch calculation unit 26 output unit

Claims (8)

(57) [Claims] 1. A method for correcting a direction data, which is executed by an apparatus having a display device and an input device, inputs a stripe pattern image and direction data of the stripe pattern, and corrects the direction data. And inputting direction data of the stripe pattern, wherein the direction data is data indicating the direction of the stripe pattern in each of the plurality of regions when the stripe pattern is divided into a plurality of regions. A second step of displaying the stripe pattern image and the direction data on the display device; and instructing, via the input device, a direction of the region in at least one of the plurality of regions. A third step of setting the direction in which the direction has been set via the input device as a fixed area, and setting the direction of an area other than the fixed area based on the direction of the fixed area. A fourth step the method of correcting the direction data of the stripe A pattern which comprises a calculating. 2. In the third step, a fifth step in which a line is designated in the plurality of regions via the input device, and a sixth region in which a region through which the line passes is set as the fixed region 2. The method according to claim 1, further comprising the step of: setting a direction of the line in the determined area as a direction of the defined area. 3. When one of the areas other than the determined area is set as a first area, the fourth step includes a predetermined number of areas Zk (k = 1, 2,
..), The direction of the area Zk is Dk, the distance between the area Zk and the first area is Rk, and the function H with respect to the direction D is represented by the following equation: Ninth step of setting the direction Dmin that minimizes H as the direction D of the first region. Method. 4. A stripe pattern image and direction data of the stripe pattern are input to a display device and an input device, and the direction data is obtained by dividing the stripe pattern into a plurality of regions when the stripe pattern is divided into a plurality of regions. An information processing device for correcting the direction of the stripe pattern, wherein the input means inputs the image of the stripe pattern and the direction data of the stripe pattern. Displaying the image of the stripe pattern and the direction data on the display device, setting a direction instructed via the input device as a direction of the region in at least one of the plurality of regions, and setting the direction via the input device. Direction setting means for setting a region in which a direction has been set as a fixed region, and direction calculating means for calculating the direction of an area other than the fixed region based on the direction of the fixed region. Information processing device. 5. A pitch data correction method which is executed by a device including a display device and an input device, inputs a stripe pattern image and pitch data of the stripe pattern, and corrects the pitch data. And inputting the image and pitch data of the stripe pattern, wherein the pitch data is data indicating a pitch of the stripe pattern in each of the plurality of regions when the stripe pattern is divided into a plurality of regions. A second step of displaying the image of the stripe pattern and the pitch data on the display device; and one or more points Ok (k = 1, 2) in the stripe pattern
2,...), The pitch Pk (k
= 1, 2,...) Via the input device, and a fourth step of calculating a pitch of each of the plurality of regions based on a pitch at the point Ok. A method of correcting the pitch data of a stripe pattern characterized by the following. 6. The striped pattern pitch according to claim 5, wherein in the third step, a circle having a point Ok as a center and a pitch Pk at the point Ok as a radius is displayed on the display device. How to correct the data. 7. A region in which a pitch is to be calculated among the plurality of regions is defined as a first region, and the first region and the point O are determined.
When the distance between k is Rk (k = 1, 2,...), in the fourth step, the pitch P of the first region is expressed by the following formula: 7. The method according to claim 6, wherein the pitch data is calculated according to the following formula. 8. A stripe pattern image and pitch data of the stripe pattern are input to a display device and an input device, and the pitch data is a value of the plurality of regions when the stripe pattern is divided into a plurality of regions. An information processing device for correcting the pitch data of the stripe pattern, wherein the input means inputs the image of the stripe pattern and the pitch data of the stripe pattern; Is displayed on the display device, and one or more points Ok in the stripe pattern are displayed.
(K = 1, 2,...), Pitch setting means for inputting a pitch Pk (k = 1, 2,...) At this point Ok through the input device; And a pitch calculating means for calculating a pitch of each of the regions.