void ImageUtility3::Dilate(int numNeighbors, std::array<int, 3> const* delta, Image3<int> const& inImage, Image3<int>& outImage) { int const bound0M1 = inImage.GetDimension(0) - 1; int const bound1M1 = inImage.GetDimension(1) - 1; int const bound2M1 = inImage.GetDimension(2) - 1; for (int i2 = 1; i2 < bound2M1; ++i2) { for (int i1 = 1; i1 < bound1M1; ++i1) { for (int i0 = 1; i0 < bound0M1; ++i0) { if (inImage(i0, i1, i2) == 0) { for (int n = 0; n < numNeighbors; ++n) { int d0 = delta[n][0]; int d1 = delta[n][1]; int d2 = delta[n][2]; if (inImage(i0 + d0, i1 + d1, i2 + d2) == 1) { outImage(i0, i1, i2) = 1; break; } } } else { outImage(i0, i1, i2) = 1; } } } } }
//---------------------------------------------------------------------------- void ImageUtility3::GetComponents18(Image3<int>& image, std::vector<std::vector<int> >& components) { // Incremental 1D offsets for 18-connected neighbors. Store +1 and -1 // first, the xy-offsets second, to be cache friendly during the // depth-first search. int const dim0 = image.GetDimension(0); int const dim01 = dim0*image.GetDimension(1); int const delta[18] = { +1, -1, -1 - dim0, 0 - dim0, +1 - dim0, -1 + dim0, 0 + dim0, +1 + dim0, 0 + dim01, +1 + dim01, -1 + dim01, 0 - dim0 + dim01, 0 + dim0 + dim01, 0 - dim01, +1 - dim01, -1 - dim01, 0 - dim0 - dim01, 0 + dim0 - dim01 }; GetComponents(18, delta, image, components); }
//---------------------------------------------------------------------------- void ImageUtility3::GetComponents6(Image3<int>& image, std::vector<std::vector<int> >& components) { // Incremental 1D offsets for 6-connected neighbors. Store +1 and -1 // first to be cache friendly during the depth-first search. int const dim0 = image.GetDimension(0); int const dim01 = dim0*image.GetDimension(1); int const delta[6] = { +1, -1, -dim0, +dim0, +dim01, -dim01 }; GetComponents(6, delta, image, components); }
//--------------------------------------------------------------------------- void SetInitial3 (Image3<float>& initial) { const int n0 = initial.GetDimension(0); const int n1 = initial.GetDimension(1); const int n2 = initial.GetDimension(2); for (int i2 = 0; i2 < n2; ++i2) { float x2 = -1.0f + 2.0f*i2/(float)(n2-1); float value2 = 1.0f - x2*x2; for (int i1 = 0; i1 < n1; ++i1) { float x1 = -1.0f + 2.0f*i1/(float)(n1-1); float value1 = 1.0f - x1*x1; float value12 = value1*value2; for (int i0 = 0; i0 < n0; ++i0) { float x0 = -1.0f + 2.0f*i0/(float)(n0-1); float value0 = 1.0f - x0*x0; initial(i0, i1, i2) = value0*value12; } } } }
void ImageUtility3::ComputeCDConvex(Image3<int>& image) { int const dim0 = image.GetDimension(0); int const dim1 = image.GetDimension(1); int const dim2 = image.GetDimension(2); Image3<int> temp = image; int i0, i1, i2; for (i1 = 0; i1 < dim1; ++i1) { for (i0 = 0; i0 < dim0; ++i0) { int i2min; for (i2min = 0; i2min < dim2; ++i2min) { if ((temp(i0, i1, i2min) & 1) == 0) { temp(i0, i1, i2min) |= 2; } else { break; } } if (i2min < dim2) { int i2max; for (i2max = dim2 - 1; i2max >= i2min; --i2max) { if ((temp(i0, i1, i2max) & 1) == 0) { temp(i0, i1, i2max) |= 2; } else { break; } } } } } for (i2 = 0; i2 < dim2; ++i2) { for (i0 = 0; i0 < dim0; ++i0) { int i1min; for (i1min = 0; i1min < dim1; ++i1min) { if ((temp(i0, i1min, i2) & 1) == 0) { temp(i0, i1min, i2) |= 2; } else { break; } } if (i1min < dim1) { int i1max; for (i1max = dim1 - 1; i1max >= i1min; --i1max) { if ((temp(i0, i1max, i2) & 1) == 0) { temp(i0, i1max, i2) |= 2; } else { break; } } } } } for (i2 = 0; i2 < dim2; ++i2) { for (i1 = 0; i1 < dim1; ++i1) { int i0min; for (i0min = 0; i0min < dim0; ++i0min) { if ((temp(i0min, i1, i2) & 1) == 0) { temp(i0min, i1, i2) |= 2; } else { break; } } if (i0min < dim0) { int i0max; for (i0max = dim0 - 1; i0max >= i0min; --i0max) { if ((temp(i0max, i1, i2) & 1) == 0) { temp(i0max, i1, i2) |= 2; } else { break; } } } } } for (size_t i = 0; i < image.GetNumPixels(); ++i) { image[i] = (temp[i] & 2 ? 0 : 1); } }