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KMID : 0878220070190020022
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Journal of Sasang Constitutional Medicine
2007 Volume.19 No. 2 p.22 ~ p.29
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An Error Analysis of the 3D Automatic Face Recognition Apparatus (3D-AFRA) Hardware
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Kwak Chang-Kyu
Seok Jae-Hwa
Song Jung-Hoon
Kim Hyun-Jin
Hwang Min-Woo
Yoo Jung-Hee
Koh Byung-Hee
Kim Jong-Won
Lee Eui-Ju
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Abstract
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1.Objectives Sasang Contitutional Medicine, a part of the traditional Korean medical lore, treats illness through a constitutional typing system that categorizespeople into four constitutional types. A few of the important criteria for differentiating the constitutional types are external appearances, inner state of mind, and pathological patterns. We had been developing a 3D Automatic Face Recognition Apparatus (3D-AFRA) in order to evaluate the external appearances with more objectivity. This apparatus provides a 3D image and numerical data on facial configuration, and this study aims to evaluate the mechanical accuracy of the 3D-AFRA hardware.
2.Methods Several objects of different shapes (cube, cylinder, cone, pyramid) were each scanned 10 times using the 3D Automatic Face Recognition Apparatus (3D-AFRA). The results were then compared and analyzed with data retrieved through a laser scanner known for its high accuracy. The error rates were analyzed for each grid point of facial contour scanned with Rapidform2006 (Rapidform2006 is a 3D scanning software that collects grid point data for contours of various products and products and product parts through 3D scanners and other 3D measuring devices; the grid point data thusly acquired is then used to reconstruct highly precise polygon and curvature models).
3.Results and Conclusions The average error rate was 0.22mm for the cube, 0.22mm for the cylinder, 0.125mm for the cone, and 0.172mm for the pyramid. The visual data comparing error rates for measurement figures retrieved with Rapidform2006 is shown in Fig.3~Fig.6. Blue tendency indicates smaller error rates, while red indicates greater error rates The protruding corners of the cube display red, indicating greater error rates. The cylinder shows greater error rates on the edges. The pyramid displays greater error rates on the base surface and around the vertex. The cone also shows greater error around the protruding edge.
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KEYWORD
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3 Dimension, Face, Automatic, Sasang Constitutional Medicine (SCM)
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