KR101642959B1 - Apparatus and Method for Pattern Image Acquisition - Google Patents

Abstract

Disclosed is a pattern image acquiring apparatus and method capable of acquiring a digital pattern image from an object having a surface having a concave-convex pattern formed on one side, such as a paint or a stamp. The acquiring device of the present invention acquires unit images at a predetermined frame rate from an object in contact with a pattern contact window and then displays only the unit images in which the size of the object corresponding to the pattern is equal to or larger than a certain size of the entire image size By performing the synthesis, the image synthesis is automatically started, and at the same time, the quality of the synthesized image is tested.

Description

[0001] Apparatus and Method for Pattern Image Acquisition [0002]

The present invention relates to a pattern image acquiring apparatus and a method for acquiring a digital pattern image from an object having a surface having a concavo-convex pattern such as a stamp or a stamp.

A stamp or a stamp used as a decision-making means is formed by embossing ink or ink on a surface engraved with a concavo-convex shape, thereby creating an image of the concavo-convex shape of the surface or the like. A method of acquiring an image obtained by a stamp or a stamp with a digital image is a method of scanning an image using a separate digital scanning device for the paper on which the uneven image is recorded.

Recently, however, there has been proposed a method of directly producing such a painting or stamp using a conventional optical fingerprint recognition apparatus as a digital image (for example, Korean Patent No. 1179423, an apparatus and method for obtaining a concave-convex pattern image). According to the present invention, a method of cumulatively synthesizing a plurality of images obtained in the process of stamping a paint is used to generate a final paint image.

If you look at the way of actually taking a picture, even if you take it down in the vertical direction, you can do various types of painting like pressing and turning. In this process, a plurality of individual paint images to be generated may not be one matched image, so that an error of image matching may occur when the images are cumulatively combined.

As such, it is necessary to test the quality of the inputted stamp or stamp image because the user's stamp form is different each time and it is difficult to expect accurate input.

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a pattern image acquiring apparatus and method capable of acquiring a digital pattern image from an article having a surface having a concavo-convex pattern such as a stamp or stamp (hereinafter referred to as a '

It is still another object of the present invention to provide a pattern image acquiring apparatus and method capable of testing the quality of a synthesized digital pattern image.

According to an aspect of the present invention, there is provided a method for acquiring a pattern image, the method comprising: acquiring a unit image sequentially from a pattern contact window; Wherein when the size of the object in the sequentially acquired unit image is equal to or larger than a predetermined start reference value, the object enters the capture mode, and the object is captured in the unit image among irregularities of the object contacting the pattern contact window; And terminating the capture mode when the size of the object in the unit image sequentially acquired in the capture mode is equal to or greater than the end reference value, wherein the end reference value is larger than the start reference value; And final synthesizing the image of the concave-convex pattern of the object based on the unit image from the entry to the end of the capture mode.

According to an exemplary embodiment of the present invention, there is provided a method for acquiring a pattern image according to the present invention, further comprising the step of forcibly terminating the capture mode when a predetermined time has elapsed without the unit image having the object size equal to or greater than the end reference value during the capture mode .

In the case where the capture mode is forcibly terminated, it may be determined that the pattern image acquisition is unsuccessful for the object, and the final synthesizing step may not be performed, and the unit image And finally synthesizing the image of the concavo-convex pattern of the object based on the image of the object.

The method may further include receiving the shape information of the concavo-convex pattern of the object from the user. This step may be performed by a method of selecting one of a plurality of type information, and the start reference value and the end reference value may be determined in proportion to the object-representative size represented by the selected type information.

Here, when the type information is not received from the user, the start reference value is determined based on the smallest of a plurality of object-representative sizes represented by each of the plurality of type information, and the end reference value is determined based on the object- And a step of determining the largest size among the sizes.

According to another aspect of the present invention, an apparatus for acquiring a pattern image includes an image input unit, a receiving control unit, and an image combining unit.

The image input unit includes a pattern contact window to sequentially acquire a unit image from the pattern contact window.

Wherein the reception control unit enters a capture mode when the size of the object in the sequentially acquired unit image is equal to or greater than a predetermined start reference value, and when the size of the object in the unit image sequentially acquired in the capture mode is equal to or larger than the end reference value, And terminates.

The image combining unit finally synthesizes the image of the concave-convex pattern of the object based on the unit image from the entry to the end of the capture mode.

According to the present invention, the pattern image obtaining apparatus can obtain a unit image of a pattern surface of an object having a concavo-convex pattern such as a stamp or a stamp as a continuous frame, and then synthesize these unit images to obtain an image of the surface of the concave-

Generally, in consideration of a method of depressing an object such as a painting, the acquiring device of the present invention allows the image synthesis to be performed only on the unit images whose size of the pattern image is equal to or larger than the entire size of the entire image frame, At the same time as this is disclosed, the image processing process can be simplified and accelerated in comparison with the conventional method in which all the unit images captured by an object are used for final image synthesis.

Further, the method of the present invention captures a unit image to be used for image composition based on the size of an object captured in the unit image, thereby effecting the quality test of the image capturing process itself.

If a predetermined time elapses without the unit image including the size of the object corresponding to the original pattern image of the object among the acquired unit images, the pattern image obtaining process is regarded as 'failure' The result may be displayed to determine whether the image acquisition was successful or not.

1 is a block diagram of a pattern image acquisition apparatus of the present invention;
Fig. 2 is a view showing a pattern of a pattern surface 10a of various coatings conventionally used,
3 is a diagram illustrating a unit image obtained by the image input unit, a final image synthesized by the image synthesizing unit, and
Figs. 4 and 5 are diagrams provided in the explanation of the pattern image synthesis method of the present invention. Fig.

Hereinafter, embodiments of the present invention in which the above object can be specifically realized will be described with reference to the accompanying drawings.

1, the pattern image obtaining apparatus 100 of the present invention includes an image input unit 101, a reference value managing unit 103, a receiving control unit 105, an image combining unit 107, and a memory 109, It is possible to obtain a digital pattern image from an object having a surface on which a specific concave-convex pattern is formed, such as a paint or a stamp (hereinafter referred to as a " pattern surface "). Here, it is sufficient that the object has the pattern surface 10a formed on one side thereof, and it is not always necessary to have the same or similar form as the stamp or the stamp. Hereinafter, the painting 10 will be described as an example of various types of objects.

The image input unit 101 is an optical or non-optical image acquisition module (or sensor) having a pattern contact window 101a and is configured to set a plurality of 'unit images' of the pattern contact window 101a And provides it to the reception control unit 105. [0064] If the paint 10 contacts the pattern contact window 101a, a 'unit image' including the pattern image of the paint 10 is obtained.

Here, the unit image is distinguished from the 'final image'. The final image is a pattern image of the paint 10 finally generated by the image acquiring apparatus 100 by the image synthesizing unit 107 by synthesizing a plurality of unit images.

3 shows an example in which the first unit image p1 to the twelfth unit image p12 generated by the image input unit 101 and the final image p13 synthesized by the image combining unit 107 are shown. Since it is almost the case that the user does not press the coating 10 accurately in the vertical direction but rather starts rotating at a tilted or angled angle, the first unit image p1 to the twelfth unit image p12 in Fig. (Hereinafter, referred to as 'object') in a unit image sequentially acquired from a single painting (1), such as a single painting (1)).

The reference value management unit 103 divides the input paint 10 into several objects (paint) in consideration of general paint forms, and maps and manages different reference values for each paint form. Here, the shape of the paint means the shape of the outer surface of the pattern surface 10a of the paint 10. For example, as shown in FIG. 2, the reference value management unit 103 may distinguish a coating from (a) 'square' (b) 'square' (c) 'ellipse' (d) 'small ellipse' (e) 'other'. (e) 'Other' refers to cases not belonging to the remaining four.

The reference value managed by the reference value management unit 103 includes an 'object-representative size' according to the above coating type, a start reference value to be used by the reception control unit 105 for 'start detection', and an end reference value to be used for 'end detection'.

The object-representative size means the size of the entire pattern surface 10a of the paint 10, and has a different value for each paint form. However, since the size of the same type of coating may vary, the object-representative size is assumed to be a representative size of the corresponding coating type, and the total size of the pattern surface 10a of the representative coating is used as an 'object-representative size' do.

Before the user presses the paint 10 on the pattern contact window 101a, the reference value managing unit 103 stores shape information of the paint 10 to be pressed onto the pattern contact window 101a from the user, that is, 10a can be inputted.

The reference value management unit 103 provides the 'start reference value' and the 'end reference value', which are mapped differently according to the type information, to the reception control unit 105. 2 (a) through a separate input unit (not shown, for example, a button) in order to receive the 'type information' of the painting 10 to be contacted by the user from the pattern contact window 101a, To (e) may be input from the user.

Here, the 'start reference value' and the 'end reference value' are values related to the size of the object. The starting reference value is determined in consideration of (1) the ratio of the object-representative size to the total size of one image frame or (2) the object-representative size. For example, if the object-representative size is large, the start reference value is large, and if the object-representative size is small, the start reference value is also set small.

The 'end criterion value' is also determined in the same way as the start criterion value, taking into account, for example, the object-representative size. For example, the termination reference value may be set to a value corresponding to 95% of the object-representative size.

The 'start reference value' and the 'end reference value' are related to the operation of the reception control unit 105. The reception control unit 105 calculates the size of an object (pattern area) for each unit image continuously input in units of frames from the image input unit 101, and then calculates the size of an object (pattern area) (Hereinafter, simply referred to as 'start detection'), and enters a 'capture mode'. (2) During the capture mode, when a unit image having a value equal to or higher than the end reference value is input, (Simply, termination detection).

When the paint 10 is pressed onto the pattern contact window 101a, the unit images obtained and provided by the image input unit 101 are examined. In most cases, different objects are included every frame as shown in FIG. Since a unit image in which an object is included in a size smaller than the start threshold value is only used to complicate the image processing process rather than being useful for final image synthesis, it is preferable to use the image from an image including a certain size or more Do.

In other words, the detection of the start of the reception control unit 105 detects whether the size of the object included in the unit image acquired by the image input unit 101 is greater than or equal to a significant size, Which is different from the detection of contact.

Therefore, the reference value management unit 103 sets a value corresponding to a certain ratio of the object-representative size (in other words, a certain ratio of the total frame size) to the 'start reference value' in consideration of the object-representative size. For example, when the start reference value is set to a value corresponding to 10% of the object-representative size with respect to the painting of FIGS. 2 (a) to 2 (c), FIG. 2 (d) can be set to 5%. On the other hand, in the case of (e), since the shape and size of the coating can not be determined, flexible conditions can be set. For example, the start reference value of FIG. 2 (e) can be set equal to the start reference value of the smallest (d) object-representative size.

Termination detection differs from sensing whether the size of the object included in the unit image acquired by the image input unit 101 corresponds to the object-representative size and whether the seal 10 is detached from the pattern-contact window 101a .

Since the unit image input after the end detection by the 'end reference value' is not used for the final image synthesis, the end reference value should be set to a level that does not cause any problem in the overall image synthesis.

The reference value management unit 103 can set the end reference value to a value corresponding to approximately 95 to 100% of the object-representative size, and can be determined differently according to the shape information of the painting. For example, the ending reference value for the painting of FIGS. 2 (a) to 2 (d) can be set to a value corresponding to 95% of each object-representative size.

On the other hand, in case (e), the shape and size of the painting can not be determined, and therefore, it should be set to a flexible condition. For example, it is preferable that the end reference value in FIG. 2 (e) is set to be equal to the end reference value of one of (a) to (c) belonging to the larger object-representative size. If the object-representative size is set to be the same as the small size (d), it is a problem if the size of the inputted painting is much larger than (d).

Hereinafter, the start detection and the end detection based on the operation of the reception control unit 105 will be described with reference to FIG. 4 and FIG. 5, with reference to the example of FIG. For the sake of explanation, in the example of Fig. 3, the first unit image p1 to the third unit image p3 are set such that the size of the object does not become 10% of the frame size, It is assumed that the object size of the unit image p12 corresponds to 10% or more of the frame size. For the square paint, the start reference value is a value corresponding to 10% of the total size of the image frame, and the end reference value is assumed to be a value corresponding to 95% of the object-representative size preset in the square.

<Initiation detection: Fig. 4>

end. Reference value selection: S401

First, the reference value management unit 103 receives the form information of the painting 10 to be pressed onto the pattern contact window 101a from the user through an input unit (not shown). 3 (a) is an example in which a square is selected. Accordingly, the reference value management unit 103 provides the start control value and the end reference value, which are mapped to the square, to the reception control unit 105. [

I. Unit image acquisition: S403

The image input unit 101 continuously acquires a unit image according to a preset frame rate and provides it to the reception control unit 105. When the user who inputs the shape information of the paint 10 through the input unit (not shown) presses the paint 10 into the pattern contact window 101a, the image input unit 101 displays the first The unit image p1 to the twelfth unit image p12 may be acquired and sequentially provided to the reception control unit 105. [

All. Initiation detection judgment: S405, S407

The reception control unit 105 that receives the 'start reference value' and the 'end reference value' from the reference value management unit 103 performs start detection on the unit image provided from the image input unit 101.

For initiation detection, the reception control unit 105 first extracts the size of the object from the unit image. There are various ways to calculate the size of an object. For example, the size of the object may be calculated by calculating the number of pixels having non-white grayscale values among all the pixels in the unit image (S405).

The reception control unit 105 compares the size of the object extracted in step S405 with the start reference value to perform start detection. The reception control unit 105 waits for the unit image of the next frame to be input from the image input unit 101 (S407) without further processing the unit image of the frame whose start is not detected.

In the example of FIG. 3, since the unit image of the previous frame of the first unit image p1 includes no object at all, the reception control unit 105 does not determine 'start detection'. Since the object size is less than the start reference value even if the first unitary image p1 to the third unitary image p3 are input, the reception control unit 105 controls the first unitary image p1 to the third unitary image p3 It is not judged as "initiation detection".

If the reception control unit 105 receives the fourth unit image p4 after the third unit image p3, the reception control unit 105 finally determines 'start detection'.

la. Enter capture mode: S409

If there is an initiation detection in step S407, the reception control unit 105 stores the initiation-detected unit image in the memory 109 and enters a 'capture mode' while capturing the unit image.

<Termination Detection and Image Synthesis: FIG. 5>

end. End detection: S501 to S509

During the capture mode, the image input unit 101 continuously acquires a unit image from the painting 10 in contact with the pattern contact window 101a in units of frames (S501), and the receiving control unit 105 acquires the unit image (Step S503).

The reception control unit 105 determines whether the size of the object extracted in step S503 is greater than or equal to the end reference value and performs end detection if the size of the object is greater than the end reference value (S505). The reception control unit 105 stores the unfinished unit image in the memory 109 and captures it, and waits for input of a new unit image (S507).

In the example of FIG. 3, the termination reference value is a value corresponding to 95% of the square object-representative size. Since the object sizes of the fourth unit image p4 to the eleventh unit image p11 are smaller than the end reference value, the reception control unit 105 does not receive the fourth unit image p4 through the eleventh unit image p11, It is stored in the memory 109 without being sensed and captured.

If the size of the object is determined to be equal to or larger than the end reference value in step S505, the reception control unit 105 determines that the end of the object is detected, stores the unit image in the memory 109, captures the image, and then ends the capture mode. 3, when the twelfth unit image p4 having an object larger than 95% of the square object-representative size is input, the reception control unit 105 determines that it is 'end detection' Is stored in the memory 109 and the capture mode is terminated (S509).

The reception control unit 105 does not perform any further image processing and does not capture the unit image of the next frame provided from the image input unit 101. [

I. Final image synthesis: S511

After detection of termination, the reception control unit 105 requests the image composition unit 107 to synthesize the final image based on the unit image stored in the memory 109 during the capture mode. Accordingly, the image synthesizing unit 107 synthesizes the final images using the first to twelfth unit images p1 to p12 stored in the memory 109. [

The image synthesis unit 107 synthesizes the final image using various mathematical and logical image synthesis techniques known in the art. According to the embodiment, the image compositing unit 107 may convert the synthesized gray level image into a color image in order to generate a final image which is color.

<Forced termination according to time>

Case 1 - Failed to acquire image

When there is an initiation detection, the reception control section 105 can start the operation of the timer (not shown) and count the elapse of the predetermined time. Here, the predetermined time is for forcibly performing the end detection, and can be set to a time generally used when the paint 10 is pressed onto the pattern contact window 101a.

If the termination is not detected in step S505, the reception control unit 105 proceeds to the capture mode while repeating steps S501 to S507. When a predetermined time elapses during the capture mode, the reception control unit 105 forcibly ends the capture mode regardless of the determination result in step S505.

3 (a) to 3 (d), the unit image having an object size (for example, a size of 95%) corresponding to the object-representative size among the cases in which the user has forcibly terminated the time- Is not inputted, it corresponds to the case where the paint pattern input fails. Finally, forced termination over time is equivalent to performing a full quality check of the pattern image acquisition operation.

In this case as well, the reception control unit 105 can request the image composition unit 107 to synthesize the final image based on the unit image stored in the memory 109. [ The image synthesis unit 107 may display the synthesized final image on a display unit (not shown) so that a user or an administrator can refer to the failure situation. In some cases, As a normal result.

Case 2 - The coating type is 'Other'

When the form of the painting inputted by the user out of the cases of forced termination with the lapse of time is (e) in Fig. 3, the reception control unit 105 does not process the painting input failure. However, instead of performing step S509, the reception control unit 105 requests the image composition unit 107 to synthesize the final image based on the unit image stored in the memory 109. [

2 (e), that is, even if the object-representative size can not be set, the reception control section (Fig. 2 (c) You will be able to capture.

It is to be understood by those skilled in the art that the present invention may be embodied in many other forms without departing from the spirit and scope of the invention, It is also to be understood that the above-described embodiments are to be considered illustrative and not restrictive, and all embodiments within the scope of the appended claims and their equivalents are intended to be included within the scope of the present invention.

Claims (12)

The method comprising the steps of: receiving external shape information of an uneven portion of a paint or stamp as an object to be contacted with a pattern contact window from a user, the method comprising: selecting one of a plurality of shape information;
Sequentially obtaining a unit image of a concave-convex portion of an object in contact with the pattern-contact window;
Entering a capture mode for storing the unit image in a memory when the size of the object in the sequentially acquired unit image is equal to or larger than a predetermined start reference value;
And terminating the capture mode when the size of the object in the unit image sequentially acquired in the capture mode is equal to or greater than the end reference value, wherein the end reference value is larger than the start reference value; And
And final synthesizing the image of the concave-convex pattern of the object based on the unit image from the entry to the end of the capture mode,
Wherein the object is a concavo-convex pattern of the object convexo-concave portion captured in the unit image,
Wherein the start reference value and the end reference value are determined in proportion to an object-representative size represented by the selected type information.

The method according to claim 1,
Further comprising the step of forcibly terminating the capture mode when a predetermined time has elapsed without the unit image having the object size equal to or greater than the end reference value during the capture mode.
3. The method of claim 2,
Wherein when the capture mode is forcibly terminated, the pattern image acquisition processing unit fails to acquire a pattern image for the object, and does not perform the final synthesis step.
3. The method of claim 2,
And finally combining the image of the concave-convex pattern of the object based on the unit image from the entry to the end of the capture mode when the capture mode is forcibly terminated.
delete The method according to claim 1,
The start reference value is determined based on the smallest of the plurality of object-representative sizes represented by each of the plurality of type information, and the end reference value is determined based on the object-representative sizes Wherein the step of determining the pattern image comprises the steps of:
A reference value management unit for receiving information on the shape of a concave / convex portion of a stamp or a stamp, which is an object to be contacted by a pattern contact window, from a user, and receiving a method of selecting one of a plurality of type information;
An image input unit having the pattern contact window to sequentially acquire a unit image of the concave-convex portion of the object;
Wherein when a size of an object in the sequentially acquired unit image is equal to or larger than a predetermined start reference value, the unit enters a capture mode for storing the unit image in a memory, and the size of the object in the unit image sequentially acquired in the capture mode is equal to or larger than an end reference value A reception control unit for terminating the capture mode; And
And an image synthesizer for final synthesizing the image of the concavo-convex pattern of the concavo-convex pattern on the basis of the unit image from the entry to the end of the capture mode,
Wherein the object is a concavo-convex pattern of the object convexo-concave portion captured in the unit image, the termination reference value is larger than the start reference value,
Wherein the reference value management unit provides the start control value and the end control value, which are determined to be proportional to the object-representative size, represented by the type information, to the reception control unit.
8. The method of claim 7,
Wherein the reception control unit forcibly terminates the capture mode when a predetermined time elapses in a state in which the object size of the object size is equal to or greater than the end reference value in the capture mode.
8. The method of claim 7,
The reception control unit may control the image synthesis unit to perform a process of not acquiring a pattern image for the object when the capture mode is forcibly terminated and to prevent the image synthesis unit from performing a final synthesis process of the image of the concave- Pattern image acquisition device.
10. The method of claim 9,
Wherein the reception control unit requests the image composition unit to finally synthesize the image of the concave-convex pattern of the object based on the unit image from when the capture mode is entered to when the capture mode is forcibly terminated, when the capture mode is forcibly terminated Pattern image acquisition device.
delete 8. The method of claim 7,
Wherein the reference value management unit determines the start reference value based on a smallest of a plurality of object-representative sizes represented by each of the plurality of type information, when the type information is not received from the user, And determines the termination reference value based on the largest one among the plurality of patterns.

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