void distort_2d_data_transformer::transform(
const float * data,
float * data_transformed,
const layer_configuration_specific& original_config,
unsigned int sample_id)
{
if (original_config.dimension_sizes.size() < 2)
throw neural_network_exception((boost::format("distort_2d_data_transformer is processing at least 2d data, data is passed with number of dimensions %1%") % original_config.dimension_sizes.size()).str());
float rotation_angle = rotate_angle_distribution.min();
float scale = scale_distribution.min();
float shift_x = shift_x_distribution.min();
float shift_y = shift_y_distribution.min();
bool flip_around_x_axis = (flip_around_x_distribution.min() == 1);
bool flip_around_y_axis = (flip_around_y_distribution.min() == 1);
float stretch = stretch_distribution.min();
float stretch_angle = stretch_angle_distribution.min();
float perspective_reverse_distance = perspective_reverse_distance_distribution.min();
float perspective_distance = std::numeric_limits<float>::max();
float perspective_angle = perspective_angle_distribution.min();
{
std::lock_guard<std::mutex> lock(gen_stream_mutex);
if (apply_rotate_angle_distribution)
rotation_angle = rotate_angle_distribution(generator);
if (apply_scale_distribution)
scale = scale_distribution(generator);
if (apply_shift_x_distribution)
shift_x = shift_x_distribution(generator);
if (apply_shift_y_distribution)
shift_y = shift_y_distribution(generator);
if (flip_around_x_distribution.max() > flip_around_x_distribution.min())
flip_around_x_axis = (flip_around_x_distribution(generator) == 1);
if (flip_around_y_distribution.max() > flip_around_y_distribution.min())
flip_around_y_axis = (flip_around_y_distribution(generator) == 1);
if (apply_stretch_distribution)
stretch = stretch_distribution(generator);
stretch_angle = stretch_angle_distribution(generator);
if (apply_perspective_reverse_distance_distribution)
{
perspective_reverse_distance = perspective_reverse_distance_distribution(generator);
if (perspective_reverse_distance > 0.0F)
perspective_distance = 1.0F / perspective_reverse_distance;
}
perspective_angle = perspective_angle_distribution(generator);
}
unsigned int neuron_count_per_image = original_config.dimension_sizes[0] * original_config.dimension_sizes[1];
unsigned int image_count = original_config.get_neuron_count() / neuron_count_per_image;
for(unsigned int image_id = 0; image_id < image_count; ++image_id)
{
cv::Mat1f dest_image(static_cast<int>(original_config.dimension_sizes[1]), static_cast<int>(original_config.dimension_sizes[0]), data_transformed + (image_id * neuron_count_per_image));
cv::Mat1f image(static_cast<int>(original_config.dimension_sizes[1]), static_cast<int>(original_config.dimension_sizes[0]), const_cast<float *>(data) + (image_id * neuron_count_per_image));
if ((rotation_angle != 0.0F) || (scale != 1.0F) || (shift_x != 0.0F) || (shift_y != 0.0F) || (stretch != 1.0F) || (perspective_distance != std::numeric_limits<float>::max()))
{
data_transformer_util::stretch_rotate_scale_shift_perspective(
dest_image,
image,
cv::Point2f(static_cast<float>(image.cols) * 0.5F, static_cast<float>(image.rows) * 0.5F),
rotation_angle,
scale,
shift_x,
shift_y,
stretch,
stretch_angle,
perspective_distance,
perspective_angle,
border_value);
data_transformer_util::flip(
dest_image,
flip_around_x_axis,
flip_around_y_axis);
}
else
{
data_transformer_util::flip(
dest_image,
image,
flip_around_x_axis,
flip_around_y_axis);
}
}
}
void distort_2d_data_transformer::transform(
const void * data,
void * data_transformed,
neuron_data_type::input_type type,
const layer_configuration_specific& original_config,
unsigned int sample_id)
{
if (type != neuron_data_type::type_byte)
throw neural_network_exception("distort_2d_data_transformer is implemented for data stored as bytes only");
if (original_config.dimension_sizes.size() < 2)
throw neural_network_exception((boost::format("distort_2d_data_transformer is processing at least 2d data, data is passed with number of dimensions %1%") % original_config.dimension_sizes.size()).str());
float rotation_angle = rotate_angle_distribution.min();
if (rotate_angle_distribution.max() > rotate_angle_distribution.min())
rotation_angle = rotate_angle_distribution(generator);
float scale = scale_distribution.min();
if (scale_distribution.max() > scale_distribution.min())
scale = scale_distribution(generator);
float shift_x = shift_x_distribution.min();
if (shift_x_distribution.max() > shift_x_distribution.min())
shift_x = shift_x_distribution(generator);
float shift_y = shift_y_distribution.min();
if (shift_y_distribution.max() > shift_y_distribution.min())
shift_y = shift_y_distribution(generator);
bool flip_around_x_axis = (flip_around_x_distribution.min() == 1);
if (flip_around_x_distribution.max() > flip_around_x_distribution.min())
flip_around_x_axis = (flip_around_x_distribution(generator) == 1);
bool flip_around_y_axis = (flip_around_y_distribution.min() == 1);
if (flip_around_y_distribution.max() > flip_around_y_distribution.min())
flip_around_y_axis = (flip_around_y_distribution(generator) == 1);
float stretch = stretch_distribution.min();
if (stretch_distribution.max() > stretch_distribution.min())
stretch = stretch_distribution(generator);
float stretch_angle = stretch_angle_distribution.min();
if (stretch_angle_distribution.max() > stretch_angle_distribution.min())
stretch_angle = stretch_angle_distribution(generator);
float perspective_reverse_distance = perspective_reverse_distance_distribution.min();
if (perspective_reverse_distance_distribution.max() > perspective_reverse_distance_distribution.min())
perspective_reverse_distance = perspective_reverse_distance_distribution(generator);
float perspective_distance = std::numeric_limits<float>::max();
if (perspective_reverse_distance > 0.0F)
perspective_distance = 1.0F / perspective_reverse_distance;
float perspective_angle = perspective_angle_distribution.min();
if (perspective_angle_distribution.max() > perspective_angle_distribution.min())
perspective_angle = perspective_angle_distribution(generator);
unsigned int neuron_count_per_image = original_config.dimension_sizes[0] * original_config.dimension_sizes[1];
unsigned int image_count = original_config.get_neuron_count() / neuron_count_per_image;
for(unsigned int image_id = 0; image_id < image_count; ++image_id)
{
cv::Mat1b image(static_cast<int>(original_config.dimension_sizes[1]), static_cast<int>(original_config.dimension_sizes[0]), static_cast<unsigned char *>(data_transformed) + (image_id * neuron_count_per_image));
if ((rotation_angle != 0.0F) || (scale != 1.0F) || (shift_x != 0.0F) || (shift_y != 0.0F) || (stretch != 1.0F) || (perspective_distance != std::numeric_limits<float>::max()))
{
data_transformer_util::stretch_rotate_scale_shift_perspective(
image,
cv::Point2f(static_cast<float>(image.cols) * 0.5F, static_cast<float>(image.rows) * 0.5F),
rotation_angle,
scale,
shift_x,
shift_y,
stretch,
stretch_angle,
perspective_distance,
perspective_angle,
border_value);
}
data_transformer_util::flip(
image,
flip_around_x_axis,
flip_around_y_axis);
}
}