static gboolean
ufo_custom_sparsity_minimize_real (UfoSparsity *sparsity,
UfoBuffer *input,
UfoBuffer *output)
{
g_print ("\nufo_custom_sparsity_minimize_real\n");
UfoCustomSparsityPrivate *priv = UFO_CUSTOM_SPARSITY_GET_PRIVATE (sparsity);
UfoBuffer *tmp = ufo_buffer_dup (output);
UfoBuffer *tmp2 = ufo_buffer_dup (output);
ufo_transform_direct (priv->transform, input, tmp);
ufo_method_process (priv->method, tmp, tmp2);
ufo_transform_inverse (priv->transform, tmp2, output);
return FALSE;
}
static gboolean
ufo_refeed_task_process (UfoTask *task,
UfoBuffer **inputs,
UfoBuffer *output,
UfoRequisition *requisition)
{
UfoRefeedTaskPrivate *priv;
priv = UFO_REFEED_TASK_GET_PRIVATE (task);
priv->buffers = g_list_append (priv->buffers, ufo_buffer_dup (inputs[0]));
ufo_buffer_copy (inputs[0], output);
return TRUE;
}
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;
}
