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utils.py
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#!/usr/bin python3
""" Utilities available across all scripts """
import logging
import os
import warnings
from hashlib import sha1
from pathlib import Path
from re import finditer
import cv2
import numpy as np
import dlib
from lib.faces_detect import DetectedFace
from lib.logger import get_loglevel
logger = logging.getLogger(__name__) # pylint: disable=invalid-name
# Global variables
_image_extensions = [ # pylint: disable=invalid-name
".bmp", ".jpeg", ".jpg", ".png", ".tif", ".tiff"]
_video_extensions = [ # pylint: disable=invalid-name
".avi", ".flv", ".mkv", ".mov", ".mp4", ".mpeg", ".webm"]
def get_folder(path):
""" Return a path to a folder, creating it if it doesn't exist """
logger.debug("Requested path: '%s'", path)
output_dir = Path(path)
output_dir.mkdir(parents=True, exist_ok=True)
logger.debug("Returning: '%s'", output_dir)
return output_dir
def get_image_paths(directory):
""" Return a list of images that reside in a folder """
image_extensions = _image_extensions
dir_contents = list()
if not os.path.exists(directory):
logger.debug("Creating folder: '%s'", directory)
directory = get_folder(directory)
dir_scanned = sorted(os.scandir(directory), key=lambda x: x.name)
logger.debug("Scanned Folder contains %s files", len(dir_scanned))
logger.trace("Scanned Folder Contents: %s", dir_scanned)
for chkfile in dir_scanned:
if any([chkfile.name.lower().endswith(ext)
for ext in image_extensions]):
logger.trace("Adding '%s' to image list", chkfile.path)
dir_contents.append(chkfile.path)
logger.debug("Returning %s images", len(dir_contents))
return dir_contents
def hash_image_file(filename):
""" Return an image file's sha1 hash """
img = cv2.imread(filename) # pylint: disable=no-member
img_hash = sha1(img).hexdigest()
logger.trace("filename: '%s', hash: %s", filename, img_hash)
return img_hash
def hash_encode_image(image, extension):
""" Encode the image, get the hash and return the hash with
encoded image """
img = cv2.imencode(extension, image)[1] # pylint: disable=no-member
f_hash = sha1(
cv2.imdecode(img, cv2.IMREAD_UNCHANGED)).hexdigest() # pylint: disable=no-member
return f_hash, img
def backup_file(directory, filename):
""" Backup a given file by appending .bk to the end """
logger.trace("Backing up: '%s'", filename)
origfile = os.path.join(directory, filename)
backupfile = origfile + '.bk'
if os.path.exists(backupfile):
logger.trace("Removing existing file: '%s'", backup_file)
os.remove(backupfile)
if os.path.exists(origfile):
logger.trace("Renaming: '%s' to '%s'", origfile, backup_file)
os.rename(origfile, backupfile)
def set_system_verbosity(loglevel):
""" Set the verbosity level of tensorflow and suppresses
future and deprecation warnings from any modules
From:
https://stackoverflow.com/questions/35911252/disable-tensorflow-debugging-information
Can be set to:
0 - all logs shown
1 - filter out INFO logs
2 - filter out WARNING logs
3 - filter out ERROR logs """
numeric_level = get_loglevel(loglevel)
loglevel = "2" if numeric_level > 15 else "0"
logger.debug("System Verbosity level: %s", loglevel)
os.environ['TF_CPP_MIN_LOG_LEVEL'] = loglevel
if loglevel != '0':
for warncat in (FutureWarning, DeprecationWarning, UserWarning):
warnings.simplefilter(action='ignore', category=warncat)
def rotate_landmarks(face, rotation_matrix):
# pylint: disable=c-extension-no-member
""" Rotate the landmarks and bounding box for faces
found in rotated images.
Pass in a DetectedFace object, Alignments dict or DLib rectangle"""
logger.trace("Rotating landmarks: (rotation_matrix: %s, type(face): %s",
rotation_matrix, type(face))
if isinstance(face, DetectedFace):
bounding_box = [[face.x, face.y],
[face.x + face.w, face.y],
[face.x + face.w, face.y + face.h],
[face.x, face.y + face.h]]
landmarks = face.landmarksXY
elif isinstance(face, dict):
bounding_box = [[face.get("x", 0), face.get("y", 0)],
[face.get("x", 0) + face.get("w", 0),
face.get("y", 0)],
[face.get("x", 0) + face.get("w", 0),
face.get("y", 0) + face.get("h", 0)],
[face.get("x", 0),
face.get("y", 0) + face.get("h", 0)]]
landmarks = face.get("landmarksXY", list())
elif isinstance(face,
dlib.rectangle): # pylint: disable=c-extension-no-member
bounding_box = [[face.left(), face.top()],
[face.right(), face.top()],
[face.right(), face.bottom()],
[face.left(), face.bottom()]]
landmarks = list()
else:
raise ValueError("Unsupported face type")
logger.trace("Original landmarks: %s", landmarks)
rotation_matrix = cv2.invertAffineTransform( # pylint: disable=no-member
rotation_matrix)
rotated = list()
for item in (bounding_box, landmarks):
if not item:
continue
points = np.array(item, np.int32)
points = np.expand_dims(points, axis=0)
transformed = cv2.transform(points, # pylint: disable=no-member
rotation_matrix).astype(np.int32)
rotated.append(transformed.squeeze())
# Bounding box should follow x, y planes, so get min/max
# for non-90 degree rotations
pt_x = min([pnt[0] for pnt in rotated[0]])
pt_y = min([pnt[1] for pnt in rotated[0]])
pt_x1 = max([pnt[0] for pnt in rotated[0]])
pt_y1 = max([pnt[1] for pnt in rotated[0]])
if isinstance(face, DetectedFace):
face.x = int(pt_x)
face.y = int(pt_y)
face.w = int(pt_x1 - pt_x)
face.h = int(pt_y1 - pt_y)
face.r = 0
if len(rotated) > 1:
rotated_landmarks = [tuple(point) for point in rotated[1].tolist()]
face.landmarksXY = rotated_landmarks
elif isinstance(face, dict):
face["x"] = int(pt_x)
face["y"] = int(pt_y)
face["w"] = int(pt_x1 - pt_x)
face["h"] = int(pt_y1 - pt_y)
face["r"] = 0
if len(rotated) > 1:
rotated_landmarks = [tuple(point) for point in rotated[1].tolist()]
face["landmarksXY"] = rotated_landmarks
else:
rotated_landmarks = dlib.rectangle( # pylint: disable=c-extension-no-member
int(pt_x), int(pt_y), int(pt_x1), int(pt_y1))
face = rotated_landmarks
logger.trace("Rotated landmarks: %s", rotated_landmarks)
return face
def camel_case_split(identifier):
""" Split a camel case name
from: https://stackoverflow.com/questions/29916065 """
matches = finditer(
".+?(?:(?<=[a-z])(?=[A-Z])|(?<=[A-Z])(?=[A-Z][a-z])|$)",
identifier)
return [m.group(0) for m in matches]
def safe_shutdown():
""" Close queues, threads and processes in event of crash """
logger.debug("Safely shutting down")
from lib.queue_manager import queue_manager
from lib.multithreading import terminate_processes
queue_manager.terminate_queues()
terminate_processes()
logger.debug("Cleanup complete. Shutting down queue manager and exiting")
queue_manager._log_queue.put(None) # pylint: disable=protected-access
while not queue_manager._log_queue.empty(): # pylint: disable=protected-access
continue
queue_manager.manager.shutdown()