KR-20260066293-A - APPARATUS TO DETERMINE THE AUTHENTICITY OF ARTWORKS THROUGH THE ANALYSIS OF CRACKS BASED ON OPTICAL COHERENCE TOMOGRAPHY

Abstract

The present invention relates to a device for determining the authenticity of artwork through crack analysis based on optical coherence tomography. According to one aspect of the present invention, the device for determining the authenticity of artwork through crack analysis based on optical coherence tomography acquires an optical coherence tomography image of a crack generated by optical coherence tomography of an area containing a crack on the surface of an artwork, extracts a cross-sectional image of a plane intersecting the crack from the optical coherence tomography image, and determines the authenticity of the artwork based on the shape of the crack in the cross-sectional image.

Inventors

• 김규정
• 김수정

Assignees

• 부산대학교 산학협력단

Dates

Publication Date

20260512

Application Date

20241104

Claims (7)

1. Communications Department; Memory for storing preset commands; and A processor connected to the communication unit and the memory and executing a process for determining the authenticity of artwork by performing the commands; comprising The above processor By obtaining an optical coherence tomography image of a crack generated by optical coherence tomography of an area containing a crack on the surface of an artwork from an external device through the above communication unit, A cross-sectional image of the plane intersecting the crack is extracted from the above optical interference tomography image, and Determining the authenticity of an artwork based on the shape of the crack in the cross-sectional image above. Artwork authenticity determination device through crack analysis based on optical coherence tomography.
2. In paragraph 1, The above processor Detect a crack region corresponding to a crack in the cross-sectional image above, and In the above crack area, the width value for the horizontal length and the depth value for the vertical length of the above crack area are calculated, Based on the calculated width value, the crack characteristics are classified into one of the preset crack characteristics according to the ratio of medium to paint, and Determining whether it is genuine or counterfeit based on whether the calculated width and depth values satisfy pre-established criteria for classified crack characteristics. Artwork authenticity determination device through crack analysis based on optical coherence tomography.
3. In paragraph 2, The above processor Classifying the crack characteristic into either a pre-set first crack characteristic, meaning that the ratio of medium to paint is greater in the upper part of the artwork than in the lower part, or a pre-set second crack characteristic, meaning that the ratio of medium to paint is greater in the lower part of the artwork than in the upper part, depending on whether the calculated width value exceeds a pre-set threshold. Artwork authenticity determination device through crack analysis based on optical coherence tomography.
4. In paragraph 3, The above processor Calculating width values for the horizontal length of the crack area at different vertical positions and depth values for the vertical length of the crack area at different horizontal positions, by dividing the crack area into a predetermined number of horizontal and vertical positions. Artwork authenticity determination device through crack analysis based on optical coherence tomography.
5. In paragraph 4, The above processor Based on the width value for the uppermost vertical position among the calculated width values, classifying it as a preset first crack characteristic if it exceeds a preset threshold and as a second crack characteristic if it does not exceed a preset threshold. Artwork authenticity determination device through crack analysis based on optical coherence tomography.
6. In paragraph 4, The above processor When classified according to the classified crack characteristics, determining whether it is genuine or counterfeit based on whether the amount of change in width values for different vertical positions calculated is within a preset threshold. Artwork authenticity determination device through crack analysis based on optical coherence tomography.
7. In paragraph 4, The above processor When classified into a preset second crack characteristic according to the classified crack characteristic, determining whether it is genuine or counterfeit based on whether the aspect ratio, which is the ratio of the largest width value among the calculated width values to the largest depth value among the calculated depth values, is within a preset threshold. Artwork authenticity determination device through crack analysis based on optical coherence tomography.

Description

Apparatus to Determine the Authenticity of Artworks Through the Analysis of Cracks Based on Optical Coherence Tomography The present invention relates to a technology for determining the authenticity of a work of art. [Acknowledgements] This project (result) is the result of the Phase 3 Leading University Industry-Academic Cooperation Project (LINC 3.0), which was funded by the Ministry of Education and the National Research Foundation of Korea. (English: Following are results of a study on the "Leaders in Industry-university Cooperation 3.0" Project, supported by the Ministry of Education and National Research Foundat ion of Korea) In the international art market, the number of transactions and transaction values of artworks are generally increasing, despite some fluctuations. This is attributed to rising public interest and demand for art, as well as a growing awareness of the cultural and financial value of artworks. Meanwhile, art forgery scandals driven by financial gain are occurring, and forgery technology is rapidly advancing. Since forged artworks can undermine the credibility of the art market and cause economic disruption, the development of specialized technology to distinguish authenticity is necessary to support artists' activities and facilitate smooth transactions within the market. Traditionally, the determination of authenticity in artworks has primarily been made through visual inspection by insightful experts. However, this existing method presents challenges, such as potential variations in accuracy depending on the expert, and the difficulty of identifying forgeries as forgery techniques become increasingly sophisticated. To solve the above problem, Korean Patent Application No. 10-2015-0084407 discloses a technology for appraising the authenticity of artworks by analyzing the surface curvature shape of the artworks through coherent interference tomography. This existing technology has the problem of requiring a long time for imaging and data processing because it requires extensive imaging of the artwork's surface. According to recent research, cracks in painted surfaces contain information about unique characteristics, such as environmental factors and pigment ratios, suggesting that these cracks can be utilized to determine the authenticity of artworks. Existing crack analysis techniques, which involve extracting and analyzing pigments from artworks, suffer from the problem of causing irreversible damage to the original pieces. A case has been disclosed in which natural cracks and forged cracks were successfully distinguished by magnifying the crack shape using a microscope that provides high-magnification images. While this existing technique enables rapid analysis, it has the limitation of observing only the upper surface of the crack. FIG. 1 is a conceptual diagram showing the crack shape measurement and authenticity determination process of an art authenticity determination device based on optical coherence tomography crack analysis according to an embodiment of the present invention. FIG. 2 is a block diagram of an art authenticity determination device based on optical coherence tomography crack analysis according to an embodiment of the present invention. FIG. 3 is a flowchart of the operation of a device for determining the authenticity of artwork through crack analysis based on optical coherence tomography according to an embodiment of the present invention. Figure 4 is a drawing showing the surface shape of each crack included in the genuine and counterfeit versions of Artwork 1 and Artwork 2. Figure 5 is a diagram showing cross-sectional images of each crack included in the genuine and counterfeit versions of Artwork 1 and Artwork 2. Figure 6a is a table summarizing the results of analyzing the shape of the cracks in the cross-sectional images of each crack in Figure 5. Figure 6b is a graph showing the crack width values calculated from the cross-sectional images of each crack in Figure 5. Figure 6c is a graph showing the crack depth values calculated from the cross-sectional images of each crack in Figure 5. Figure 6d is a graph showing the width value versus the depth value of the crack calculated from the cross-sectional image of each crack in Figure 5. Figure 6e is a graph showing the ratio of the width value to the depth value of the crack calculated from the cross-sectional image of each crack in Figure 5. The advantages and features of the present invention, and the methods for achieving them, will become clear by referring to the embodiments described below in detail together with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below but may be implemented in various different forms. These embodiments are provided merely to ensure that the disclosure of the present invention is complete and to fully inform those skilled in the art of the scope of the invention, and the present invention is defined only by the cl