View publication | Laboratory of Mathematical Methods of Image Processing

Title	Edge-directional interpolation algorithm using structure tensor
Publication type	Conference paper
Author(s)	A.Nasonov, A.Krylov, X.Petrova, M.Rychagov
Publication date	2016
Conference	Submitted to Electronic Imaging
Comment	Filter coefficients are: res.s1_default = new float[] { 0.065f, -0.392f, 1.327f }; res.s1_ortho = new float[] { -0.068f, -0.182f, -0.025f, 1.275f }; res.s1_diag = new float[] { -0.062f, -0.161f, 0.075f, 0.013f, -0.020f, 1.065f, 0.177f, -0.087f }; res.s2_default = new float[] { 0.130f, -0.545f, 1.415f }; res.s2_ortho = new float[] { 0.185f, -0.303f, -0.286f, 1.404f }; res.s2_diag = new float[] { 0.078f, -0.053f, -0.188f, -0.026f, -0.124f, 0.457f, 0.922f, -0.066f }; s1[1][0] = s1[1][3] = s1[1][12] = s1[1][15] = s1_ortho[0] * 0.25f; s1[1][1] = s1[1][2] = s1[1][13] = s1[1][14] = s1_ortho[1] * 0.25f; s1[1][4] = s1[1][7] = s1[1][8] = s1[1][11] = s1_ortho[2] * 0.25f; s1[1][5] = s1[1][6] = s1[1][9] = s1[1][10] = s1_ortho[3] * 0.25f; s1[2][0] = s1[2][15] = s1_diag[0] * 0.5f; s1[2][1] = s1[2][14] = s1_diag[1] * 0.5f; s1[2][2] = s1[2][13] = s1_diag[2] * 0.5f; s1[2][3] = s1[2][12] = s1_diag[3] * 0.5f; s1[2][4] = s1[2][11] = s1_diag[4] * 0.5f; s1[2][5] = s1[2][10] = s1_diag[5] * 0.5f; s1[2][6] = s1[2][9] = s1_diag[6] * 0.5f; s1[2][7] = s1[2][8] = s1_diag[7] * 0.5f; s1[3][0] = s1[3][15] = s1_diag[0] * 0.5f; s1[3][4] = s1[3][11] = s1_diag[1] * 0.5f; s1[3][7] = s1[3][8] = s1_diag[2] * 0.5f; s1[3][3] = s1[3][12] = s1_diag[3] * 0.5f; s1[3][1] = s1[3][14] = s1_diag[4] * 0.5f; s1[3][5] = s1[3][10] = s1_diag[5] * 0.5f; s1[3][6] = s1[3][9] = s1_diag[6] * 0.5f; s1[3][2] = s1[3][13] = s1_diag[7] * 0.5f; s1[4][0] = s1[4][3] = s1[4][12] = s1[4][15] = s1_ortho[0] * 0.25f; s1[4][4] = s1[4][7] = s1[4][8] = s1[4][11] = s1_ortho[1] * 0.25f; s1[4][1] = s1[4][2] = s1[4][13] = s1[4][14] = s1_ortho[2] * 0.25f; s1[4][5] = s1[4][6] = s1[4][9] = s1[4][10] = s1_ortho[3] * 0.25f; s1[5][3] = s1[5][12] = s1_diag[0] * 0.5f; s1[5][7] = s1[5][8] = s1_diag[1] * 0.5f; s1[5][4] = s1[5][11] = s1_diag[2] * 0.5f; s1[5][0] = s1[5][15] = s1_diag[3] * 0.5f; s1[5][2] = s1[5][13] = s1_diag[4] * 0.5f; s1[5][6] = s1[5][9] = s1_diag[5] * 0.5f; s1[5][5] = s1[5][10] = s1_diag[6] * 0.5f; s1[5][1] = s1[5][14] = s1_diag[7] * 0.5f; s1[6][3] = s1[6][12] = s1_diag[0] * 0.5f; s1[6][2] = s1[6][13] = s1_diag[1] * 0.5f; s1[6][1] = s1[6][14] = s1_diag[2] * 0.5f; s1[6][0] = s1[6][15] = s1_diag[3] * 0.5f; s1[6][7] = s1[6][8] = s1_diag[4] * 0.5f; s1[6][6] = s1[6][9] = s1_diag[5] * 0.5f; s1[6][5] = s1[6][10] = s1_diag[6] * 0.5f; s1[6][4] = s1[6][11] = s1_diag[7] * 0.5f; s1[0][0] = s1[0][3] = s1[0][12] = s1[0][15] = s1_default[0] * 0.25f; s1[0][1] = s1[0][2] = s1[0][13] = s1[0][14] = s1[0][4] = s1[0][7] = s1[0][8] = s1[0][11] = s1_default[1] * 0.125f; s1[0][5] = s1[0][6] = s1[0][9] = s1[0][10] = s1_default[2] * 0.25f; s2[1][0] = s2[1][3] = s2[1][12] = s2[1][15] = s2_ortho[0] * 0.25f; s2[1][1] = s2[1][2] = s2[1][13] = s2[1][14] = s2_ortho[1] * 0.25f; s2[1][4] = s2[1][7] = s2[1][8] = s2[1][11] = s2_ortho[2] * 0.25f; s2[1][5] = s2[1][6] = s2[1][9] = s2[1][10] = s2_ortho[3] * 0.25f; s2[2][0] = s2[2][15] = s2_diag[0] * 0.5f; s2[2][1] = s2[2][14] = s2_diag[1] * 0.5f; s2[2][2] = s2[2][13] = s2_diag[2] * 0.5f; s2[2][3] = s2[2][12] = s2_diag[3] * 0.5f; s2[2][4] = s2[2][11] = s2_diag[4] * 0.5f; s2[2][5] = s2[2][10] = s2_diag[5] * 0.5f; s2[2][6] = s2[2][9] = s2_diag[6] * 0.5f; s2[2][7] = s2[2][8] = s2_diag[7] * 0.5f; s2[3][3] = s2[3][12] = s2_diag[0] * 0.5f; s2[3][2] = s2[3][13] = s2_diag[1] * 0.5f; s2[3][1] = s2[3][14] = s2_diag[2] * 0.5f; s2[3][0] = s2[3][15] = s2_diag[3] * 0.5f; s2[3][7] = s2[3][8] = s2_diag[4] * 0.5f; s2[3][6] = s2[3][9] = s2_diag[5] * 0.5f; s2[3][5] = s2[3][10] = s2_diag[6] * 0.5f; s2[3][4] = s2[3][11] = s2_diag[7] * 0.5f; s2[4][0] = s2[4][3] = s2[4][12] = s2[4][15] = s2_ortho[0] * 0.25f; s2[4][4] = s2[4][7] = s2[4][8] = s2[4][11] = s2_ortho[1] * 0.25f; s2[4][1] = s2[4][2] = s2[4][13] = s2[4][14] = s2_ortho[2] * 0.25f; s2[4][5] = s2[4][6] = s2[4][9] = s2[4][10] = s2_ortho[3] * 0.25f; s2[5][3] = s2[5][12] = s2_diag[0] * 0.5f; s2[5][7] = s2[5][8] = s2_diag[1] * 0.5f; s2[5][4] = s2[5][11] = s2_diag[2] * 0.5f; s2[5][0] = s2[5][15] = s2_diag[3] * 0.5f; s2[5][2] = s2[5][13] = s2_diag[4] * 0.5f; s2[5][6] = s2[5][9] = s2_diag[5] * 0.5f; s2[5][5] = s2[5][10] = s2_diag[6] * 0.5f; s2[5][1] = s2[5][14] = s2_diag[7] * 0.5f; s2[6][0] = s2[6][15] = s2_diag[0] * 0.5f; s2[6][4] = s2[6][11] = s2_diag[1] * 0.5f; s2[6][7] = s2[6][8] = s2_diag[2] * 0.5f; s2[6][3] = s2[6][12] = s2_diag[3] * 0.5f; s2[6][1] = s2[6][14] = s2_diag[4] * 0.5f; s2[6][5] = s2[6][10] = s2_diag[5] * 0.5f; s2[6][6] = s2[6][9] = s2_diag[6] * 0.5f; s2[6][2] = s2[6][13] = s2_diag[7] * 0.5f; s2[0][0] = s2[0][3] = s2[0][12] = s2[0][15] = s2_default[0] * 0.25f; s2[0][1] = s2[0][2] = s2[0][13] = s2[0][14] = s2[0][4] = s2[0][7] = s2[0][8] = s2[0][11] = s2_default[1] * 0.125f; s2[0][5] = s2[0][6] = s2[0][9] = s2[0][10] = s2_default[2] * 0.25f;

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@INPROCEEDINGS{*,
  Title = {Edge-directional interpolation algorithm using structure tensor},
  Author = {A. Nasonov and A. Krylov and X. Petrova and M. Rychagov},
  BookTitle = {Submitted to Electronic Imaging},
  Year = {2016},
  Language = {english}
}