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1 Application of image correlation technique to determination of in-plane deformation distribution of paper Toshiharu Enomae Graduate School of Agricultural and Life Sciences The University of Tokyo 1 Peters 1) Sutton Chao 2) Wong 3) Choi 4) 5) 6) 7) 1/17

2 A A (1) S fg f ( x, y) g( x, y) dxdy S fg = 2 2 f ( x, y) dxdy g( x, y) dxdy (1) f(x, y) g(x, y) 2 (x, y) B / High resolution bi-cubic spline interpolation function 8 sinπx sinc π x (2) f ( x) = ( a + 2) x f ( x) = ax 3 3 5ax ( a + 3) x ax 4a x 1 1 < x 2 (2) 1 1 a a = 1 2 x 0 2 x x /17

3 3 UTM CCD XC-77 2/3 CCD 768( ) 493( ) 570TV mm cm MD %RH 40 mm 60 g/m 2 N 3/17

4 MD CD 7 5 TVS mm 50 mm ES-2000 ESA4FLU 31 9 CD MD mm 15 µm 6.0 mm 10 µm mm 50 mm 10 mm/min 1.96 N % 25% 75% 4/17

5 CD MD MD MD 6 CCD MD CD 5/17

6 1) Peters, W. H. and Ranson, W. F.: Digital imaging techniques in experimental stress analysis, Optical Engineering, 21(3), p.426, (1982) 2) Sutton, M. A. and Chao, Y-J: Measurement of strains in a paper tensile specimen using computer vision and digital image correlation Part 1: Data acquisition and image analysis system, Tappi J. 71(3), pp , (1988) 3) Wong, L., Kortschot, M. T. and Dodson, C. T. J.: Effect of formation on local strain fields and fracture of paper, J. Pulp Paper Sci. 22(6), pp.j , (1996) 4) Choi, D., Thorpe, J. L. and Hanna, R. B.: Image analysis to measure strain in wood and paper, Wood Science and Technology, 25, pp , (1991) 5), :,, 45(3), pp , (1999) 6) Lif, J. O, Fellers, C., Soremark, C. and Sjodahl, M.: Characterizing the In-Plane Hygroexpansivity of Paper by Electronic Speckle Photography, J. Pulp Paper Sci., 21(9), pp.j302, (1995) 7),, :,, 56(11): pp , (2002). 8) Parker, A., Kenyon, R. V. and Troxel, D. E.: Comparison of interpolating methods for image resampling, IEEE Trans MI-2, 1(3), pp.31-39, (1983) 9) Enomae, T., Asakawa, R. Onabe,F., Yoshizaki, M., Fukasawa, H., Hiyoshi K. and Kurata, T.: Development of Nursing Care Sheets of Cellulosic Nonwoven Fabrics for Ageing Society, Textile Research Journal, 76(1), pp.41-48, (2006). 6/17

7 (A) (B) 1. A 1 B. 7/17

8 /17

9 CCD 3 9/17

10 0 s 10 mm 120 s 4. 0s 120 s. 10/17

11 time=1 time=1 0 s 120 s 10 mm 5 11/17

12 time=33 time= mm 6 12/17

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14 /17

15 time=1 10 mm 9 15/17

16 1 mm time= /17

17 1 mm time= /17

18 1) W. H. Peters, W. F. Ranson, Digital imaging techniques in experimental stress analysis, Optical Engineering 21(3) 426(1982) 2) Sutton, M. A. and Chao, Y-J, Measurement of strains in a paper tensile specimen using computer vision and digital image correlation Part 1: Data acquisition and image analysis system, Tappi J. 71(3), (1988) 3) Wong, L., Kortschot, M. T. and Dodson, C. T. J., Effect of formation on local strain fields and fracture of paper, J. Pulp Paper Sci. 22(6), J (1996) 4) Choi, D., Thorpe, J. L. and Hanna, R. B., Image analysis to measure strain in wood and paper, Wood Science and Technology 25, (1991) 5),, 45(3), (1999) 6) Lif, J. O, Fellers, C., Soremark, C. and Sjodahl, M., Characterizing the In-Plane Hygroexpansivity of Paper by Electronic Speckle Photography, J. Pulp Paper Sci. 21(9): J302(1995) 7),,, " ",, 56(11): (2002). 8) Anthony Parker, Robert V. Kenyon and Donald E. Troxel Comparison of interpolating methods for image resampling IEEE Trans MI-2 1(3) p ) Enomae, T., Asakawa, R. Onabe,F., Yoshizaki, M., Fukasawa, H., Hiyoshi K. and Kurata, T., "Development of Nursing Care Sheets of Cellulosic Nonwoven Fabrics for Ageing Society", Textile Research Journal, 76(1): (2006). 1/17

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