int main() { generate_subsets(3); return 0; }
int main() { generate_subsets(3); }
static gboolean ufo_ir_sart_process_real (UfoMethod *method, UfoBuffer *input, UfoBuffer *output) { UfoIrSARTPrivate *priv = UFO_IR_SART_GET_PRIVATE (method); UfoResources *resources = NULL; UfoProjector *projector = NULL; gpointer *cmd_queue = NULL; gfloat relaxation_factor = 0; guint max_iterations = 0; g_object_get (method, "ufo-resources", &resources, "command-queue", &cmd_queue, "projection-model", &projector, "relaxation-factor", &relaxation_factor, "max-iterations", &max_iterations, NULL); UfoGeometry *geometry = NULL; g_object_get (projector, "geometry", &geometry, NULL); // // resize UfoBuffer **method_buffers[4] = { &priv->singular_volume, &priv->singular_sino, &priv->ray_weights, &priv->b_temp }; UfoBuffer *ref_buffers[4] = { output, input, input, input }; for (guint i = 0; i < 4; ++i) { UfoRequisition _req; if (*method_buffers[i]) { ufo_buffer_get_requisition (ref_buffers[i], &_req); ufo_buffer_resize (*method_buffers[i], &_req); } else { *method_buffers[i] = ufo_buffer_dup (ref_buffers [i]); } } ufo_op_set (priv->singular_volume, 1.0f, resources, cmd_queue); ufo_op_set (priv->singular_sino, 1.0f, resources, cmd_queue); ufo_op_set (priv->ray_weights, 0, resources, cmd_queue); guint n_subsets = 0; UfoProjectionsSubset *subset = generate_subsets (geometry, &n_subsets); for (guint i = 0 ; i < n_subsets; ++i) { ufo_projector_FP (projector, priv->singular_volume, priv->ray_weights, &subset[i], 1.0f, NULL); } ufo_op_inv (priv->ray_weights, resources, cmd_queue); guint iteration = 0; while (iteration < max_iterations) { ufo_buffer_copy (input, priv->b_temp); for (guint i = 0 ; i < n_subsets; i++) { ufo_projector_FP (projector, output, priv->b_temp, &subset[i], -1.0f, NULL); ufo_op_mul_rows (priv->b_temp, priv->ray_weights, priv->b_temp, subset[i].offset, subset[i].n, resources, cmd_queue); ufo_projector_BP (projector, output, priv->b_temp, &subset[i], relaxation_factor, NULL); } iteration++; } return TRUE; }