def _load_and_postprocess(self, file_path, key, version="1.0.0"):
"""
Loads an image and post process it.
:param file_path: Image path. Type: string.
:param key: The image's key with regards to the hdf5 file. Type: string.
:param version: The version number original data. Type: String. Default: 1.0.0.
:return: The post-processed image that was loaded using the file path.
"""
data = WriterUtility.load_output_file(resolve_path(file_path),
self.write_alpha_channel,
remove=False)
data, new_key, new_version = self._apply_postprocessing(
key, data, version)
if isinstance(data, np.ndarray):
print("Key: " + key + " - shape: " + str(data.shape) +
" - dtype: " + str(data.dtype) + " - path: " + file_path)
else:
print("Key: " + key + " - path: " + file_path)
return data, new_key, new_version
def _write_frames(chunks_dir: str,
dataset_objects: list,
depths: List[np.ndarray] = [],
colors: List[np.ndarray] = [],
color_file_format: str = "PNG",
depth_scale: float = 1.0,
frames_per_chunk: int = 1000,
m2mm: bool = True,
ignore_dist_thres: float = 100.,
save_world2cam: bool = True,
jpg_quality: int = 95):
"""Write each frame's ground truth into chunk directory in BOP format
:param chunks_dir: Path to the output directory of the current chunk.
:param dataset_objects: Save annotations for these objects.
:param depths: List of depth images in m to save
:param colors: List of color images to save
:param color_file_format: File type to save color images. Available: "PNG", "JPEG"
:param jpg_quality: If color_file_format is "JPEG", save with the given quality.
:param depth_scale: Multiply the uint16 output depth image with this factor to get depth in mm. Used to trade-off between depth accuracy
and maximum depth value. Default corresponds to 65.54m maximum depth and 1mm accuracy.
:param ignore_dist_thres: Distance between camera and object after which object is ignored. Mostly due to failed physics.
:param m2mm: Original bop annotations and models are in mm. If true, we convert the gt annotations to mm here. This
is needed if BopLoader option mm2m is used.
:param frames_per_chunk: Number of frames saved in each chunk (called scene in BOP)
"""
# Format of the depth images.
depth_ext = '.png'
rgb_tpath = os.path.join(chunks_dir, '{chunk_id:06d}', 'rgb',
'{im_id:06d}' + '{im_type}')
depth_tpath = os.path.join(chunks_dir, '{chunk_id:06d}', 'depth',
'{im_id:06d}' + depth_ext)
chunk_camera_tpath = os.path.join(chunks_dir, '{chunk_id:06d}',
'scene_camera.json')
chunk_gt_tpath = os.path.join(chunks_dir, '{chunk_id:06d}',
'scene_gt.json')
# Paths to the already existing chunk folders (such folders may exist
# when appending to an existing dataset).
chunk_dirs = sorted(glob.glob(os.path.join(chunks_dir, '*')))
chunk_dirs = [d for d in chunk_dirs if os.path.isdir(d)]
# Get ID's of the last already existing chunk and frame.
curr_chunk_id = 0
curr_frame_id = 0
if len(chunk_dirs):
last_chunk_dir = sorted(chunk_dirs)[-1]
last_chunk_gt_fpath = os.path.join(last_chunk_dir, 'scene_gt.json')
chunk_gt = BopWriterUtility._load_json(last_chunk_gt_fpath,
keys_to_int=True)
# Last chunk and frame ID's.
last_chunk_id = int(os.path.basename(last_chunk_dir))
last_frame_id = int(sorted(chunk_gt.keys())[-1])
# Current chunk and frame ID's.
curr_chunk_id = last_chunk_id
curr_frame_id = last_frame_id + 1
if curr_frame_id % frames_per_chunk == 0:
curr_chunk_id += 1
curr_frame_id = 0
# Initialize structures for the GT annotations and camera info.
chunk_gt = {}
chunk_camera = {}
if curr_frame_id != 0:
# Load GT and camera info of the chunk we are appending to.
chunk_gt = BopWriterUtility._load_json(
chunk_gt_tpath.format(chunk_id=curr_chunk_id),
keys_to_int=True)
chunk_camera = BopWriterUtility._load_json(
chunk_camera_tpath.format(chunk_id=curr_chunk_id),
keys_to_int=True)
# Go through all frames.
num_new_frames = bpy.context.scene.frame_end - bpy.context.scene.frame_start
if len(depths) != len(colors) != num_new_frames:
raise Exception(
"The amount of images stored in the depths/colors does not correspond to the amount"
"of images specified by frame_start to frame_end.")
for frame_id in range(bpy.context.scene.frame_start,
bpy.context.scene.frame_end):
# Activate frame.
bpy.context.scene.frame_set(frame_id)
# Reset data structures and prepare folders for a new chunk.
if curr_frame_id == 0:
chunk_gt = {}
chunk_camera = {}
os.makedirs(
os.path.dirname(
rgb_tpath.format(chunk_id=curr_chunk_id,
im_id=0,
im_type='PNG')))
os.makedirs(
os.path.dirname(
depth_tpath.format(chunk_id=curr_chunk_id, im_id=0)))
# Get GT annotations and camera info for the current frame.
# Output translation gt in m or mm
unit_scaling = 1000. if m2mm else 1.
chunk_gt[curr_frame_id] = BopWriterUtility._get_frame_gt(
dataset_objects, unit_scaling, ignore_dist_thres)
chunk_camera[curr_frame_id] = BopWriterUtility._get_frame_camera(
save_world2cam, depth_scale, unit_scaling)
if colors:
color_rgb = colors[frame_id]
color_bgr = color_rgb[..., ::-1].copy()
if color_file_format == 'PNG':
rgb_fpath = rgb_tpath.format(chunk_id=curr_chunk_id,
im_id=curr_frame_id,
im_type='.png')
cv2.imwrite(rgb_fpath, color_bgr)
elif color_file_format == 'JPEG':
rgb_fpath = rgb_tpath.format(chunk_id=curr_chunk_id,
im_id=curr_frame_id,
im_type='.jpg')
cv2.imwrite(rgb_fpath, color_bgr,
[int(cv2.IMWRITE_JPEG_QUALITY), jpg_quality])
else:
rgb_output = Utility.find_registered_output_by_key("colors")
if rgb_output is None:
raise Exception("RGB image has not been rendered.")
color_ext = '.png' if rgb_output['path'].endswith(
'png') else '.jpg'
# Copy the resulting RGB image.
rgb_fpath = rgb_tpath.format(chunk_id=curr_chunk_id,
im_id=curr_frame_id,
im_type=color_ext)
shutil.copyfile(rgb_output['path'] % frame_id, rgb_fpath)
if depths:
depth = depths[frame_id]
else:
# Load the resulting dist image.
dist_output = Utility.find_registered_output_by_key("distance")
if dist_output is None:
raise Exception("Distance image has not been rendered.")
distance = WriterUtility.load_output_file(resolve_path(
dist_output['path'] % frame_id),
remove=False)
depth = dist2depth(distance)
# Scale the depth to retain a higher precision (the depth is saved
# as a 16-bit PNG image with range 0-65535).
depth_mm = 1000.0 * depth # [m] -> [mm]
depth_mm_scaled = depth_mm / float(depth_scale)
# Save the scaled depth image.
depth_fpath = depth_tpath.format(chunk_id=curr_chunk_id,
im_id=curr_frame_id)
BopWriterUtility._save_depth(depth_fpath, depth_mm_scaled)
# Save the chunk info if we are at the end of a chunk or at the last new frame.
if ((curr_frame_id + 1) % frames_per_chunk == 0) or \
(frame_id == num_new_frames - 1):
# Save GT annotations.
BopWriterUtility._save_json(
chunk_gt_tpath.format(chunk_id=curr_chunk_id), chunk_gt)
# Save camera info.
BopWriterUtility._save_json(
chunk_camera_tpath.format(chunk_id=curr_chunk_id),
chunk_camera)
# Update ID's.
curr_chunk_id += 1
curr_frame_id = 0
else:
curr_frame_id += 1