KR20180057390A - Method and system for forming image using wavelet transform - Google Patents

Abstract

Disclosed is a method of forming an image for coloring study of children using a wavelet transform. A method of forming an image for coloring study of children using a wavelet transform of the present invention comprises: an edge transforming step of performing an edge transform on an original image including a background and an object shown in the background through a wavelet transform; and an output step of outputting an image after performing the edge transform. According to the present invention, a result of edge detection improved compared with that of existing edge detection can be provided by detecting edges through a wavelet transform, and a method of easily and promptly obtaining an image of a desired coloring study drawing for children (for infants) can be provided, and in addition, a method of forming an image for coloring study of children using a wavelet transform, which is a method capable of directly obtaining a drawing image that is not sold in the market, can be provided.

Description

TECHNICAL FIELD [0001] The present invention relates to a method and system for forming an image for a coloring game for children using wavelet transform,

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a method and system for forming an image for a coloring game for children using wavelet transform, and more particularly, And more particularly, to a method and system for forming an image for coloring a child.

 Children can develop their emotions by painting or painting, raising their expressive power, and their creativity and imagination. Whether drawing a line, a face, a color picture, or playing a color, various artistic activities are carried out to develop a variety of emotions. Among them, coloring is the easiest and most interesting.

Coloring is the act of displaying the shapes of objects, animals, or characters around them familiar to children, and allowing the children to paint on them. There are many coloring books for these children on the market. However, painting materials for coloring books in which children's favorite characters, objects, or people exist exist only in a limited manner.

Therefore, in order to solve these limitations, a program which can make images taken by direct photographs or images obtained directly on the web as painting materials for coloring is required.

On the other hand, JPEG image compression technology based on DCT, which has been widely used so far, processes one image into several blocks. Therefore, when JPEG compressed data is transmitted through a communication medium or compressed at a high compression ratio, block loss occurs There is a problem to be done.

(0001) Korean Patent No. 10-1001691 (Registered on December 12, 2010) (0002) Korean Patent No. 10-0403601 (Registered on October 17, 2003)

The object of the present invention is to provide an image processing apparatus and method which can make an image taken directly by a photograph or an image obtained directly on the web by using a wavelet transform And to provide a method and system for forming images for use in a lithographic apparatus.

The above object may be achieved by an image processing method comprising the steps of: edge transforming an original image including a background and an object displayed in the background through wavelet transformation; And an output step of outputting an image after the edge transformation. The method for forming an image for a child coloring game using the wavelet transform is achieved.

The above object may also be achieved by an image processing method comprising the steps of: edge transforming an original image including a background and an object displayed in the background through wavelet transformation; And a storage step of storing an image after the edge transformation. The method for forming an image for a child coloring game using wavelet transformation is provided.

The edge transforming step may include a first separating step of separating low-frequency and high-frequency bands into discrete wavelet transforms for each row of the original image using a low-pass filter and a high-frequency filter.

In addition, the edge transforming step may include a second separating step of performing discrete wavelet transform on the sampled first sub-image LL by applying the low-pass filter.

And a noise removing step of obtaining a noise-removed image by applying a So Th (Soft Thresholding) technique to the image transformed in the edge transforming step.

The above object may also be accomplished by a display apparatus comprising: a display unit displaying an original image including a background and an object displayed inside the background; A conversion unit for edge-converting the original image displayed on the display unit through wavelet transformation; And an output unit for outputting an image after the edge transformation. The image forming system for children's coloring using the wavelet transform is provided.

The above object may also be accomplished by a display apparatus comprising: a display unit displaying an original image including a background and an object displayed inside the background; A conversion unit for edge-converting the original image displayed on the display unit through wavelet transformation; And a storage unit for storing an image after the edge transformation. The image forming system for children's coloring using the wavelet transform is provided.

In addition, the transform unit may perform a discrete wavelet transform primarily on a low frequency band and a high frequency band for each row of the original image using a low frequency filter and a high frequency filter.

Also, the converting unit may perform a secondary discrete wavelet transform on the sampled first sub-image LL by applying the low-pass filter.

Further, the image forming system for a child coloring game using the wavelet transform according to the present invention may include a noise removing unit for obtaining a noise-removed image by applying a So Th (Soft Thresholding) technique to an image transformed through the transforming unit .

According to the present invention, it is possible to provide an edge detection result that is superior to conventional edge detection by detecting an edge through wavelet transformation, and it is possible to provide a method for easily and rapidly obtaining a desired color pattern image for a child (child) Also, it is possible to provide a method of forming an image for a child coloring game using wavelet transformation that can directly obtain a design image that is not commercially available.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a flowchart illustrating a method for forming a color image for a child using a wavelet transform according to an embodiment of the present invention;
FIG. 2 is a flowchart illustrating a method for forming a color image for a child using a wavelet transform according to another embodiment of the present invention. FIG.
3 is a view for explaining an image forming system for children's coloring using wavelet transform according to an embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the following description of the present invention, the well-known functions or constructions are not described in order to simplify the gist of the present invention.

FIG. 1 is a flowchart illustrating an image forming method for a child coloring game using wavelet transform according to an embodiment of the present invention. FIG. 2 is a flowchart illustrating a method for forming a coloring image for a child using wavelet transform according to another embodiment of the present invention FIG. 3 is a diagram for explaining an image forming system 1 for children's coloring using wavelet transform according to an embodiment of the present invention.

The method for forming an image for a child coloring game using wavelet transformation according to the present invention may include an edge transformation step (S100) and an output step (S400). In the edge transformation step S100, an original image including a background and an object displayed inside the background is edge-transformed through a wavelet transform. In the output step (S400), an image is output after the edge transformation.

Meanwhile, the image forming method for a child coloring game using wavelet transformation according to the present invention may include an edge transformation step (S100) and a storage step (S300). In the edge transformation step S100, an original image including a background and an object displayed inside the background is subjected to edge transformation through wavelet transformation. In the storage step S300, an image is stored after edge transformation.

The original image is a digital image, which can be confirmed through a computer monitor. The original image includes a background and an object. The object is classified through a background, a color, and a contrast. The object itself includes a plurality of colors, Lt; / RTI >

The image forming method for a child coloring game using the wavelet transform according to the present invention, the edge transformation step (S100), the storage step (S300), and the output step (S400) described above.

The edge transformation step S100 according to the present invention includes a first separation step S110 for separating low-frequency and high-frequency bands into discrete wavelet transforms for each row of the original image using a low-pass filter and a high-frequency filter .

The edge transformation step S100 according to the present invention may include a second separation step S120 for performing discrete wavelet transformation on the sampled first sub-image LL using the low-pass filter.

The method for forming a coloring image for children using wavelet transform according to the present invention may further include a noise removing step of obtaining a noise-removed image by applying a soft thresholding (SoT) technique on the image transformed in the edge transforming step S100 (S200).

The image forming system (1) for children's coloring using wavelet transform according to the present invention comprises: a display unit (10) for displaying an original image including a background and an object displayed inside the background; A conversion unit 20 for edge-converting the original image displayed on the display unit 10 through wavelet transformation; And an output unit 30 for outputting an image after the edge transformation.

In addition, the image forming system (1) for children's coloring using wavelet transform according to the present invention includes a display unit (10) for displaying an original image including a background and an object displayed inside the background; A conversion unit 20 for edge-converting the original image displayed on the display unit 10 through wavelet transformation; And a storage unit for storing an image after the edge transformation.

The display unit 10 may be a conventional display device, the conversion unit 20 may include a microprocessor, and the storage unit may be a storage medium for storing computer information.

The converting unit 20 may be configured to perform discrete wavelet transform primarily on a low frequency band and a high frequency band for each row of the original image using a low frequency filter and a high frequency filter.

Also, the converting unit 20 may perform a secondary discrete wavelet transform of the sampled first sub-image LL using the low-pass filter.

In addition, the image forming system 1 for a child coloring game using the wavelet transform according to the present invention is a system for generating a noise removing noise by applying SoT (Soft Thresholding) technique to an image transformed through the transforming unit 20 And a removal unit 40.

The noise removing unit 40 may be a part of the converting unit 20 or may be separate from the converting unit 20 and the noise removing unit 40 may include a microprocessor.

According to the method and system for forming an image for a child coloring game using the wavelet transform according to the present invention, it is possible to provide an algorithm capable of detecting a clear outline rather than a conventional basic edge detection algorithm. To this end, an edge detection algorithm Lt; / RTI >

The wavelet transform used for image compression is based on a set of filters having coefficient values corresponding to the discrete wavelet function. The basic operation of the discrete wavelet transform is applicable to discrete signals having N samples. A pair of filters is applied to the signal to divide it into a low frequency band and a high frequency band, and each band is subsampled with two elements, so each N / 2 sample is included.

As described above, in the image forming method for a child coloring game using wavelet transform according to the present invention, the edge transformation step S100 includes a first separation step S110 and a second separation step S120.

 (LL), a second sub-image (LH), a third sub-image (HL), and a third sub-image (HL) by applying a low pass filter and a high pass filter to each row of the two- , A fourth sub-image HH is generated. This step corresponds to the first separation step (S110).

Here, the first sub-image LL is obtained by sub-sampling 2 by applying a low-pass filter in the horizontal and vertical directions to the original image, and the second sub-image LH is obtained by applying a high- And the third sub-image HL includes the error component of the frequency in the vertical direction to which the high-pass filter is applied in the vertical direction, and the fourth sub-image HH includes the error component of the frequency in the horizontal and vertical directions Pass filter is applied.

A second separation step S120 is performed after the first separation step S110 and a discrete wavelet is performed using the first sub-image (LL image) in the second separation stage, thereby increasing the number of steps of the wavelet . By combining the four subband images at each step, it is possible to reconstruct the resulting image with the same number of samples as the original image. The description of each subband is as follows.

The wavelet transform is suitable for image processing because it grasps the fact that the whole outline is first grasped and gradually focuses on the detailed part. Since the image compression technique using the wavelet transform compresses the entire image, it is possible to fundamentally solve the problem of JPEG. The wavelet transform can use not only the sine and cosine functions but also the wavelet coefficients as the basic functions, There is an advantage of having properties for space that are not in the conversion.

That is, in the present invention, the low-frequency band has a good characteristic of the entire image (original information), and the high-frequency band has local characteristics (edge or noise).

And edge detection can greatly reduce the amount of image data.

In addition, the filter bank algorithm divides the input signal into two bands of low-pass band and high-pass band. The approximate information (LL band), which is statistically similar to the original image, And the vertical, horizontal, and diagonal lines of the image (LH, HL, and HH bands). Therefore, it is possible to detect the edge of the image.

As described above, the edge detection method using the shrinkage characteristic of the wavelet is faster than the mask operation of the spatial area in comparison with the conventional edge detection method, and the afterimage is removed without losing the edge information of the important image There is an advantage to be able to.

In the present invention, an edge detection image processing algorithm using a wavelet transform is applied to convert an input image into a coloring pattern image, and a soft thresholding (SoT) technique is applied to remove noise to remove noise. Edge detection was performed.

The soft thresholding technique is to shrink wavelet coefficients having an absolute value smaller than a threshold value to zero and wavelet coefficients having an absolute value larger than a threshold value to a difference value from a threshold value.

As described above, according to the present invention, it is possible to provide an edge detection result that is superior to conventional edge detection by detecting an edge through wavelet transformation, and to provide a method of easily and quickly obtaining a desired color image of a child And it is also possible to provide a method of forming an image for a child coloring game using wavelet transformation that can directly obtain a pattern image that is not commercially available.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, It is obvious to those who have. Accordingly, it should be understood that such modifications or alterations should not be understood individually from the technical spirit and viewpoint of the present invention, and that modified embodiments fall within the scope of the claims of the present invention.

1: Image forming system for children's coloring using wavelet transform
10: display section 20: conversion section
30: Output section 40: Noise removing section
S100: edge conversion step S110: first separation step
S120: second separating step S200: noise removing step
S300: storing step S400: outputting step

Claims (10)

An edge transformation step of transforming an original image including a background and an object displayed in the background through wavelet transformation; And
And an output step of outputting an image after the edge transformation. The method of forming an image for a child coloring game using wavelet transformation. An edge transformation step of transforming an original image including a background and an object displayed in the background through wavelet transformation; And
And a storage step of storing an image after the edge transformation. The method of forming an image for a child coloring game using wavelet transformation. 3. The method according to claim 1 or 2,
Wherein the edge transformation step comprises:
And a first separating step of separating the low-frequency band and the high-frequency band for each row of the original image using a low-pass filter and a high-frequency filter and performing a discrete wavelet transform on the respective rows of the original image. . The method of claim 3,
Wherein the edge transformation step comprises:
And a second separation step of performing a discrete wavelet transform on the sampled first sub-image (LL) by applying the low-pass filter. 5. The method of claim 4,
And a noise removing step of obtaining a noise-free image by applying a So Th (Soft Thresholding) technique to the image transformed in the edge transforming step. A display unit displaying an original image including a background and an object displayed inside the background;
A conversion unit for edge-converting the original image displayed on the display unit through wavelet transformation; And
And an output unit for outputting an image after the edge transformation. The image forming system for a child coloring game using wavelet transformation. A display unit displaying an original image including a background and an object displayed inside the background;
A conversion unit for edge-converting the original image displayed on the display unit through wavelet transformation; And
And a storage unit for storing an image after the edge transformation. The image forming system for a child coloring game using wavelet transformation. 8. The method according to claim 6 or 7,
Wherein,
Wherein the low frequency band and the high frequency band are divided into discrete wavelet transforms for each row of the original image using a low frequency filter and a high frequency filter, and the discrete wavelet transform is primarily performed. 9. The method of claim 8,
Wherein,
Wherein the first sub-image (LL) sampled by applying the low-pass filter is subjected to a secondary discrete wavelet transform, and the image forming system for children's coloring using the wavelet transform. 10. The method of claim 9,
And a noise eliminator for obtaining a noise-removed image by applying a soft thresholding (SoT) technique to the image transformed through the transforming unit.

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