KR100216502B1 - Method for measuring state of skin wrinkles - Google Patents

Abstract

The present invention relates to a device for measuring the state of skin wrinkles that can measure the bellows state of the skin wrinkles and the like using a stereo microscope. Image data extraction unit for outputting left / right image analog data by observing the replica plate with stereo microscope, and left / right digital having one level of gray level per pixel according to the amount of light by receiving left / right analog data. A digitizing unit which outputs data, and compares the magnitude of the left / right digital data with a reference level, which is one of gray levels, receives binarized left / right digital data having a binarization value, and corresponds to the corresponding point of the other digital data based on this; and The control unit extracts three-dimensional coordinates (Xp, Wp, and Zp) for each pixel by extracting three-dimensional depths, which are relative distances of the binarized left and right digital data, and three-dimensional coordinates (Xp, Wp) for each extracted pixel. , Zp) comprises a parameter extraction unit for extracting a plurality of parameters that can observe the state of the skin wrinkles. Therefore, by using left and right image data of skin wrinkles by using stereo microscope, it is possible to directly measure skin surface more precisely to determine the aging state of skin wrinkles, and to simulate by using microvisor instead of stereo microscope. Saving time required for plate production, the present invention relates to a device for measuring the state of skin wrinkles that can measure the aging state of the skin wrinkles using a stereo microscope. Image data extraction unit that outputs left / right image analog data by observing the copy plate with stereo microscope, and minimizes the error generated during the copying process by receiving the left / right analog data to the surface of skin. The occurrence of side effects can be prevented.

Description

Skin wrinkle measuring device

The present invention relates to an apparatus for measuring the condition of skin wrinkles, and in particular, to stereoscopically quantify three-dimensional stereoscopic structure after stereo matching of left / right images of skin wrinkles using a stereo microscope, using stereoscopic principle. The present invention relates to a device for measuring the condition of skin wrinkles, by measuring the three-dimensional shape of the wrinkles and capable of quantitative reading during aging or patch test examination.

In the related art, a aging state of skin wrinkles is determined using a mechanical side view measuring instrument, an optical side view measuring instrument, or a side view measuring instrument using a laser.

The mechanical side view measuring device can measure the surface wrinkles of the skin wrinkles with a needle and then amplify them to output the skin wrinkles. The optical side view measuring device produces a replica of skin wrinkles using silicone on the outside of the skin area to be observed, and uses a microscope to irradiate the angle of the light source with a diagonal of 20-28 ° to the skin wrinkles. The shadow generated by the image analysis system (Image Analysis System) can be used to determine the state of the skin wrinkles and its structure. The side view measuring instrument using the laser measures the length of the focal point where the laser beam is reflected from the replica plate and forms the exact image by the Auto Focus function with the motor. You can judge.

However, the conventional mechanical side view measuring device has a problem that it is expensive and takes a long time to measure the appearance of the total closed surface of the skin wrinkles, and the optical side view measuring device does not directly analyze the skin wrinkles and indirectly removes the shadows caused by the skin wrinkles. Because of the measurement, there is a problem that the exact height of the skin wrinkles cannot be obtained, and since the side view measuring device using the laser does not directly measure the skin wrinkles, the accuracy is lowered and the side effects are caused on the skin surface due to the laser.

In addition, the above-described side view measuring instruments have a disadvantage in that the skin condition must be measured after fabrication of the replica plate, and thus fears are generated according to the simulation plate production, and artifacts are generated.

The purpose of the present invention is to obtain the left and right image data of the skin wrinkles by using a stereo microscope, it is possible to directly measure the skin surface more precisely, by quantitatively quantifying the shape of the skin wrinkles to various skin diagnosis aids The present invention can be used to provide an economical and accurate condition for measuring the condition of skin wrinkles, which can be used for quantitative readings, cosmetics, drugs or efficacy verification in determining the aging state of skin wrinkles or testing a patch test.

Another object of the present invention is to use the visible light to obtain the left / right image data of the skin wrinkles, Microvisioner that can directly observe the skin wrinkles without the production of a replica plate or using a stereo microscope By using it, you can save the time required to make a copying board, minimize the errors generated during the copying board manufacturing process, and measure the condition of the skin wrinkles to precisely measure the three-dimensional state of the skin wrinkles. To provide.

1 is a block diagram of a device for measuring the condition of the skin wrinkles of the present invention,

2 is a control flowchart of the apparatus for measuring the state of skin wrinkles according to the present invention.

* Explanation of symbols for main parts of the drawings

10: stereo microscope 20: image data extraction unit

30: digitizing unit 40: binarization image extraction unit

50: control unit 60: parameter extraction unit

In order to achieve the above objects, the apparatus for measuring the state of skin wrinkles of the present invention comprises: an image data extraction unit for outputting left / right analog data obtained by varying left / right image data observed with a stereo microscope according to the amount of light; Size of the reference level, which is one of the left and right digital data and the gray level, which is the output of the digitizing unit for receiving left and right analog data and outputting left and right digital data having one level of gray levels per pixel according to the amount of light. The binarization image extracting unit outputs the binarized left / right digital data having the binarization value by comparing with and receives the binarized left / right digital data and compares the corresponding points of the other digital data and the relative distance between the binarized left and right digital data. A controller which extracts three-dimensional depth by extracting three-dimensional depth, and each pixel extracted from the controller Characterized in that it comprises a parameter extraction unit for extracting a plurality of parameters that can observe the state of the skin wrinkles by the three-dimensional coordinates.

In addition, the image data extractor may output left / right analog data which varies according to the amount of light to the left / right image data of directly observing skin wrinkles using a microvisor.

According to the above-described feature of the present invention, the apparatus for measuring the condition of the skin wrinkles of the present invention applies the concept of stereoscopic vision to obtain left / right image data of skin wrinkles, thereby directly measuring the skin surface more precisely, thereby aging skin wrinkles. By using the microvisor to acquire the image data, it is possible to determine the condition and to reduce the time required to produce the replica plate, to minimize the errors generated during the simulation plate production process and to prevent the occurrence of side effects on the skin surface. .

Hereinafter, with reference to the accompanying drawings will be described in detail the apparatus for measuring the condition of the skin wrinkles.

1 is a block diagram of a device for measuring the condition of the skin wrinkles of the present invention.

The apparatus for measuring the condition of the skin wrinkles of the present invention uses a silicone on the outside of the skin area 1 to be observed to make a replica of the skin wrinkles (Reolica) and to replace the left and right of the stereo microscope 10 Image data extractor 20 and two video cameras (Frame grabber) to output left and right analog data which is observed by two video cameras installed in the lens area and the left and right image data are varied according to the amount of light. A digitizing unit 30 for receiving left and right analog data and outputting left and right digital data having one level of gray levels per pixel according to the amount of light, a digitizing unit and an output left and right digital Binarization image extraction unit 40 for outputting binarized left / right digital data having a binarization value by comparing the magnitude of the data with a reference level, which is one of gray levels, and binarization left / right digital data. 3D coordinates (Xp, Wp, Zp) for each pixel by extracting 3D depth, which is the correspondence point of other digital data and the relative distance of binarized left and right digital data Parameter extraction unit for extracting a plurality of parameters that can observe the state of the skin wrinkles by three-dimensional coordinates (Xp, Yp, Zp) for each pixel extracted from the control unit 50 for extracting the ( 60).

Also, the image data extractor 20 directly extracts an image of skin wrinkles using two high magnification microvisors instead of the stereo microscope 10 so that the observed left / right image data is varied according to the amount of light. By outputting the left and right analog data, it is not necessary to manufacture the copy board, so that the time required for manufacturing the copy board can be saved, and the error generated during the copy board production process can be minimized.

Operation of the apparatus for measuring the condition of the skin wrinkles according to the present invention according to the above configuration, referring to Figure 2, as follows.

Left / right image data extraction step (S1) is to produce a replica of the skin wrinkles (Reolica) using silicon on the outside of the skin area to be observed and observed the left / right image data by observing the replica plate with a stereo microscope Outputs left and right analog data (LA, RA) in which V is varied according to the amount of light.

The digitizing step S2 receives left and right analog data LA and RA and outputs left and right digital data LD and RD having one level of gray levels per pixel according to the amount of light.

The stereo matching step S3 compares the magnitudes of the left and right digital data LD and RD, which are outputs of the digitizing step S2, with a reference level, which is one of gray levels, and the binarized left and right digital data having a binarization value. LDB, RDB).

For example, if the gray level is 256 level and the reference level is 128 level which is halfway between 256 levels, if the contrast of one pixel has a value of 128 or more, the pixel has a high logic value, and if it is less than 128 level, a low logic value is obtained. Have

That is, the stereo matching step S3 represents left / right digital data LD and RD having one level of gray level outputted from the digitizing step S2 as high or low logic values per pixel. To the binarized left / right digital data (LDB, RDB).

Stereo matching and disparity extraction step (S4) is to receive the binarized left and right digital data (LDB, RDB), the stochastic method, the MRF-based method, the method using dynamic programming, Absorbfield neural network Binary Binary Digital Data (LDB, RDB) Binary Binary Digital Data Using Binary Algorithms such as a method using a Hopfild Neural Network, a cooperative matching algorithm, or a backpropagation algorithm Extracts the three-dimensional depth (Xp, Wp, Zp) for each pixel by extracting the three-dimensional depth, which is the disparity of the binarized left / right digital data (LDB, RDB). .

The parameter extraction step S5 extracts a plurality of parameters for observing the state of skin wrinkles by three-dimensional coordinates Xp, Yp, and Zp for each pixel extracted in the stereo matching and disparity extraction step S4. do.

Many parameters that can be used to determine the aging state of skin wrinkles or to quantitatively read the patch test include the first irregularity degree (Rz), the second irregularity degree (TRz), the cross-sectional area of bone of the skin wrinkles (Ra), The total distance (TL) of the slope of the acid of the skin wrinkles, the surface area (TA) of the skin wrinkles, and the volume of the skin wrinkles (TV).

The first irregularity level Rz can be obtained by dividing the horizontal lines into several sections to obtain the difference between the highest and the lowest height of the skin wrinkles in the respective sections and averaging their differences per vertical pixel.

The second irregularity map TRz divides the skin wrinkles expressed in the three-dimensional shape into sectors having a predetermined area, and obtains a difference between the highest height and the lowest height of the skin wrinkles in each sector. Can be obtained by averaging

The cross-sectional area Ra of the bone of the skin wrinkles is divided into sectors having a predetermined area by dividing the skin wrinkles expressed in the three-dimensional shape and refers to the cross-sectional area of the bones in the respective sectors.

이므로 피부주름의 산의 경사면의 총거리(TL)는 일정한 단면에서 이러한 선분을 모두 합한 값이다.For example, the lengths of the two points P1 (X1, Z1) and P2 (X2, Z2) on the cut surface of the skin wrinkles, that is, the distance of the slope of the mountain

Therefore, the total distance (TL) of the inclined surface of the mountain of the skin wrinkles is the sum of all these line segments in a constant cross section.

이므로 이를 기초로 3차원 공간에서 3점이 (0, 0, a), (0, 1, c), (1, 0, b)일 때 각 점간의 거리 s₁, s₂, s₃는 각각

이고, S=(s₁+s₂+s³)/2이라면 이 세 점을 꼭지점으로 하는 삼각형의 면적은

가 된다. 따라서 전 구간의 표면적은 모든 X, Y가 각각 1씩 변할 때 3점의 좌표를 이용한 삼각형의 넓이의 합이 된다.The distance between two points P ₁ (X ₁ , Y ₁ , Z ₁ ) and P ₂ (X ₂ , Y ₂ , Z ₂ ) in three-dimensional space

Therefore, when three points are (0, 0, a), (0, 1, c), (1, 0, b) in three-dimensional space, the distance between each point s ₁ , s ₂ , s ₃ is

If S = (s ₁ + s ₂ + s ³ ) / 2, then the area of the triangle with these three points as the vertex is

Becomes Therefore, the surface area of the entire section is the sum of the area of triangles using the coordinates of three points when all X and Y are changed by 1 each.

Using the above formula, the surface area TA of the skin wrinkles is the area of the skin wrinkles in each sector by dividing the three-dimensional skin wrinkles into sectors having a predetermined area.

The volume of skin wrinkles (TV) refers to the volume within each sector by dividing the three-dimensional skin wrinkles into sectors having a predetermined area. For example, the position of three points is (0, 0, a), The volume (V) for (1, 0, b) and (0, 1, c) is

The first irregularity diagram (Rz) and the second irregularity diagram for quantitative readings of skin wrinkles and aging status or patch test tests on the miter plates collected from four age groups for 104 persons. (TRz), the cross sectional area of the skin wrinkles (Ra), the total distance of the slope of the skin of the skin wrinkles (TL), the surface area of the skin wrinkles (TA), the volume of the skin wrinkles (TV), etc. Is as follows.

TABLE 1

Age-specific parameters are measured

As can be seen from the measurement results of the age-specific parameters in Table 1, the average value of a plurality of parameters is regularly increased according to the age according to the present invention. .

The present invention can be used as various skin diagnosis aids by obtaining left and right image data of skin wrinkles using a stereo microscope, and quantifying and subjecting three-dimensional stereoscopic structure after stereo matching using the principle of stereoscopic vision. The skin surface can be directly measured more precisely by measuring the three-dimensional shape of the skin wrinkles, and can be applied to the quantitative readout of the aging state of the skin wrinkles or to test the patch test, and to verify the efficacy of cosmetics or drugs.

In addition, since the visible light is used to obtain the left and right image data of the skin wrinkles, the time required for the production of the simulation plate can be determined by using a microvisor that can directly observe the skin wrinkles without using a simulation plate or a stereo microscope. It can save, minimize the errors generated during the production process of the replica plate, and can prevent the occurrence of side effects on the skin surface.

Claims (2)

An image data extraction unit for outputting left and right analog data obtained by varying the left and right image data observed with a stereo microscope according to the amount of light; and receiving the left and right analog data and performing pixel per pixel according to the amount of light. A digitizing unit for outputting left / right digital data having one level of gray levels, and having a binarization value by comparing the magnitude of the left / right digital data which is an output of the digitizing unit with a reference level which is one of the gray levels. A binarization image extracting unit for outputting binarized left and right digital data, and receiving the binarized left and right digital data, and based on the binarized image extracting unit, a three-dimensional image representing a corresponding point of other digital data and a relative distance between the binarized left and right digital data. A control unit which extracts depth and extracts three-dimensional coordinates for each pixel, and a three-dimensional unit for each pixel extracted from the control unit An apparatus for measuring the state of skin wrinkles, comprising: a parameter extracting unit configured to extract a plurality of parameters capable of observing the state of skin wrinkles by coordinates; The skin wrinkles of claim 1, wherein the image data extracting unit outputs left and right analog data which is varied according to the amount of light, using left and right image data of directly observing skin wrinkles using a microvisor. Condition measuring device.

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