def save_annotations(image_filepath, polygons):
filename_no_extension = os.path.splitext(image_filepath)[0]
npy_filepath = filename_no_extension + ".aligned.npy"
shp_filepath = filename_no_extension + ".aligned.shp"
np.save(npy_filepath, polygons)
geo_utils.save_shapefile_from_polygons(polygons, image_filepath,
shp_filepath)
def test_align_gt(runs_dirpath, ori_image, ori_metadata, ori_gt_polygons, batch_size, ds_fac_list, run_name_list,
model_disp_max_abs_value, output_dir=None, output_name=None, output_shapefiles=True, properties_list=None):
# --- Run the model --- #
print("# --- Run the model --- #")
aligned_gt_polygons, _ = multires_pipeline.multires_inference(runs_dirpath, ori_image,
ori_metadata,
ori_gt_polygons,
model_disp_max_abs_value,
batch_size, ds_fac_list,
run_name_list)
# --- Save polygons as shapefiles --- #
if output_shapefiles:
if output_dir is not None and output_name is not None:
import geo_utils
print("# --- Save polygons as shapefiles --- #")
shapefile_filename_format = "{}.aligned_gt_polygons.shp"
output_shapefile_filename = shapefile_filename_format.format(output_name, "ori")
output_shapefile_filepath = os.path.join(output_dir, output_shapefile_filename)
geo_utils.save_shapefile_from_polygons(aligned_gt_polygons, ori_metadata["filepath"],
output_shapefile_filepath, properties_list=properties_list)
else:
print_utils.print_warning("Could not save shapefile as output_dir and/or output_name was not specified.")
return aligned_gt_polygons
def main(view_info_list, pixelsize, output_base_dirpath):
# --- Loading shapefiles --- #
print("# --- Loading shapefiles --- #")
view_list = []
for view_info in view_info_list:
polygon_list, properties_list = geo_utils.get_polygons_from_shapefile(
view_info["image_filepath"], view_info["shapefile_filepath"])
view = {
"polygon_list": polygon_list,
"properties_list": properties_list,
"angle": view_info["angle"],
}
view_list.append(view)
# Extract ground truth building heights
gt_heights = []
for properties in view_list[0]["properties_list"]:
gt_heights.append(properties["HEIGHT"])
gt_heights_array = np.array(gt_heights)
# Iterate over all possible pairs of views:
heights_list = []
view_pair_list = itertools.combinations(view_list, 2)
for view_pair in view_pair_list:
heights = compute_heights(view_pair[0], view_pair[1], pixelsize)
heights_list.append(heights)
# Average results from pairs
heights_list_array = np.array(heights_list)
pred_heights_array = np.mean(heights_list_array, axis=0)
# Correct pred heights:
pred_heights_array = pred_heights_array / 4.39 # Factor found with using the ground truth polygons for computing the height
# --- Save results --- #
polygon_list = view_list[0]["polygon_list"] # Take from the first view
# Save shapefile
output_shapefile_filepath = os.path.join(
output_base_dirpath,
view_info_list[0]["image_name"] + "_pred_heights.shp")
pred_properties_list = view_list[0]["properties_list"].copy(
) # First copy existing properties list
for i, pred_height in enumerate(pred_heights_array): # Then replace HEIGHT
pred_properties_list[i]["HEIGHT"] = pred_height
geo_utils.save_shapefile_from_polygons(
view_list[0]["polygon_list"],
view_info_list[0]["image_filepath"],
output_shapefile_filepath,
properties_list=pred_properties_list)
# Save for modeling buildings in Blender and measuring accuracy
scaled_polygon_list = [polygon * pixelsize for polygon in polygon_list]
np.save(os.path.join(output_base_dirpath, "polygons.npy"),
scaled_polygon_list)
np.save(os.path.join(output_base_dirpath, "gt_heights.npy"),
gt_heights_array)
np.save(os.path.join(output_base_dirpath, "pred_heights.npy"),
pred_heights_array)
def convert_npy_to_shp(raw_dirpath, polygon_dirname, city, number, shapefile_filename_format):
# --- Load data --- #
# Load polygon data
image_filepath = read.get_image_filepath(raw_dirpath, city, number)
polygons = read.load_polygons(raw_dirpath, polygon_dirname, city, number)
if polygons is not None:
output_shapefile_filepath = read.get_polygons_filepath(raw_dirpath, polygon_dirname, city, number, overwrite_polygons_filename_format=shapefile_filename_format)
geo_utils.save_shapefile_from_polygons(polygons, image_filepath, output_shapefile_filepath)
def get_osm_annotations(filepath):
filename_no_extension = os.path.splitext(filepath)[0]
npy_filepath = filename_no_extension + ".npy"
if os.path.exists(npy_filepath):
print_utils.print_info("Loading OSM building data from disc...")
gt_polygons = np.load(npy_filepath, allow_pickle=True)
else:
print_utils.print_info(
"Fetching OSM building data from the internet...")
gt_polygons = geo_utils.get_polygons_from_osm(filepath, tag="building")
# Save npy to avoid re-fetching:
np.save(npy_filepath, gt_polygons)
# Save shapefile for visualisation:
shp_filepath = filename_no_extension + ".shp"
geo_utils.save_shapefile_from_polygons(gt_polygons, filepath,
shp_filepath)
return gt_polygons
def test(ori_image,
ori_metadata,
ori_gt_polygons,
ori_disp_polygons,
batch_size,
ds_fac_list,
run_name_list,
model_disp_max_abs_value,
thresholds,
test_output_dir,
output_name,
output_shapefiles=True,
properties_list=None):
if output_shapefiles:
assert properties_list is not None and len(ori_disp_polygons) == len(
properties_list
), "ori_disp_polygons and properties_list should have the same length"
polygons_image_plot_filename_format = "{}.polygons.png"
shapefile_filename_format = "{}.{}_polygons.shp"
segmentation_image_plot_filename_format = "{}.segmentation.png"
accuracies_filename_format = "{}.accuracy.npy"
# --- Run the model --- #
print("# --- Run the model --- #")
aligned_disp_polygons, segmentation_image = multires_pipeline.multires_inference(
ori_image, ori_metadata, ori_disp_polygons, model_disp_max_abs_value,
batch_size, ds_fac_list, run_name_list)
# aligned_disp_polygons = ori_disp_polygons
# segmentation_image = np.zeros((ori_image.shape[0], ori_image.shape[1], 4))
# --- Save segmentation_output --- #
print("# --- Save segmentation_output --- #")
plot_segmentation_image_filename = segmentation_image_plot_filename_format.format(
output_name)
plot_segmentation_image_filepath = os.path.join(
test_output_dir, plot_segmentation_image_filename)
visualization.save_plot_segmentation_image(
plot_segmentation_image_filepath, segmentation_image)
# --- Save polygons plot --- #
plot_image_filename = polygons_image_plot_filename_format.format(
output_name)
plot_image_filepath = os.path.join(test_output_dir, plot_image_filename)
visualization.save_plot_image_polygons(plot_image_filepath, ori_image,
ori_gt_polygons, ori_disp_polygons,
aligned_disp_polygons)
# visualization.save_plot_image_polygons(plot_image_filepath, ori_image, [], ori_disp_polygons,
# aligned_disp_polygons)
# --- Save polygons as shapefiles --- #
if output_shapefiles:
print("# --- Save polygons as shapefiles --- #")
output_shapefile_filename = shapefile_filename_format.format(
output_name, "ori")
output_shapefile_filepath = os.path.join(test_output_dir,
output_shapefile_filename)
geo_utils.save_shapefile_from_polygons(ori_gt_polygons,
ori_metadata["filepath"],
output_shapefile_filepath,
properties_list=properties_list)
output_shapefile_filename = shapefile_filename_format.format(
output_name, "misaligned")
output_shapefile_filepath = os.path.join(test_output_dir,
output_shapefile_filename)
geo_utils.save_shapefile_from_polygons(ori_disp_polygons,
ori_metadata["filepath"],
output_shapefile_filepath,
properties_list=properties_list)
output_shapefile_filename = shapefile_filename_format.format(
output_name, "aligned")
output_shapefile_filepath = os.path.join(test_output_dir,
output_shapefile_filename)
geo_utils.save_shapefile_from_polygons(aligned_disp_polygons,
ori_metadata["filepath"],
output_shapefile_filepath,
properties_list=properties_list)
# --- Measure accuracies --- #
if len(ori_gt_polygons) == len(aligned_disp_polygons):
print("# --- Measure accuracies --- #")
accuracies_filename = accuracies_filename_format.format(output_name)
accuracies_filepath = os.path.join(test_output_dir,
accuracies_filename)
accuracies = measure_accuracies(ori_gt_polygons, aligned_disp_polygons,
thresholds, accuracies_filepath)
print(accuracies)
