+ double const * lut_in = conversion.in()->lut (12, false);
+ double const * lut_out = conversion.out()->lut (16, true);
+ boost::numeric::ublas::matrix<double> const rgb_to_xyz = conversion.rgb_to_xyz ();
+ boost::numeric::ublas::matrix<double> const bradford = conversion.bradford ();
+
+ /* This is is the product of the RGB to XYZ matrix, the Bradford transform and the DCI companding */
+ double fast_matrix[9] = {
+ (bradford (0, 0) * rgb_to_xyz (0, 0) + bradford (0, 1) * rgb_to_xyz (1, 0) + bradford (0, 2) * rgb_to_xyz (2, 0)) * DCI_COEFFICIENT * 65535,
+ (bradford (0, 0) * rgb_to_xyz (0, 1) + bradford (0, 1) * rgb_to_xyz (1, 1) + bradford (0, 2) * rgb_to_xyz (2, 1)) * DCI_COEFFICIENT * 65535,
+ (bradford (0, 0) * rgb_to_xyz (0, 2) + bradford (0, 1) * rgb_to_xyz (1, 2) + bradford (0, 2) * rgb_to_xyz (2, 2)) * DCI_COEFFICIENT * 65535,
+ (bradford (1, 0) * rgb_to_xyz (0, 0) + bradford (1, 1) * rgb_to_xyz (1, 0) + bradford (1, 2) * rgb_to_xyz (2, 0)) * DCI_COEFFICIENT * 65535,
+ (bradford (1, 0) * rgb_to_xyz (0, 1) + bradford (1, 1) * rgb_to_xyz (1, 1) + bradford (1, 2) * rgb_to_xyz (2, 1)) * DCI_COEFFICIENT * 65535,
+ (bradford (1, 0) * rgb_to_xyz (0, 2) + bradford (1, 1) * rgb_to_xyz (1, 2) + bradford (1, 2) * rgb_to_xyz (2, 2)) * DCI_COEFFICIENT * 65535,
+ (bradford (2, 0) * rgb_to_xyz (0, 0) + bradford (2, 1) * rgb_to_xyz (1, 0) + bradford (2, 2) * rgb_to_xyz (2, 0)) * DCI_COEFFICIENT * 65535,
+ (bradford (2, 0) * rgb_to_xyz (0, 1) + bradford (2, 1) * rgb_to_xyz (1, 1) + bradford (2, 2) * rgb_to_xyz (2, 1)) * DCI_COEFFICIENT * 65535,
+ (bradford (2, 0) * rgb_to_xyz (0, 2) + bradford (2, 1) * rgb_to_xyz (1, 2) + bradford (2, 2) * rgb_to_xyz (2, 2)) * DCI_COEFFICIENT * 65535
+ };
+
+ int clamped = 0;
+ int* xyz_x = xyz->data (0);
+ int* xyz_y = xyz->data (1);
+ int* xyz_z = xyz->data (2);
+ for (int y = 0; y < size.height; ++y) {
+ uint16_t const * p = reinterpret_cast<uint16_t const *> (rgb + y * stride);
+ for (int x = 0; x < size.width; ++x) {