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308 lines
13 KiB
308 lines
13 KiB
#!/usr/bin/env python3
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import cv2
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import numpy as np
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from scipy.spatial.transform import Rotation
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import deep_models_shared_python3 as dm
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class HeadPoseEstimator:
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def __init__(self, models_directory, use_neural_compute_stick=False):
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# Load the models
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models_dir = models_directory
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print('Using the following directory to load object detector models:', models_dir)
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# file with network architecture and other information
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head_detection_model_prototxt_filename = models_dir + '/head_detection/deploy.prototxt'
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# file with network weights
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head_detection_model_caffemodel_filename = models_dir + '/head_detection/res10_300x300_ssd_iter_140000.caffemodel'
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self.face_confidence_threshold = 0.2
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print('attempting to load neural network from files')
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print('prototxt file =', head_detection_model_prototxt_filename)
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print('caffemodel file =', head_detection_model_caffemodel_filename)
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self.head_detection_model = cv2.dnn.readNetFromCaffe(head_detection_model_prototxt_filename, head_detection_model_caffemodel_filename)
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dm.print_model_info(self.head_detection_model, 'head_detection_model')
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# attempt to use Neural Compute Stick 2
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if use_neural_compute_stick:
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print('HeadPoseEstimator.__init__: Attempting to use an Intel Neural Compute Stick 2 using the following command: self.head_detection_model.setPreferableTarget(cv2.dnn.DNN_TARGET_MYRIAD)')
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self.head_detection_model.setPreferableTarget(cv2.dnn.DNN_TARGET_MYRIAD)
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head_pose_model_dir = models_dir + '/open_model_zoo/head-pose-estimation-adas-0001/FP32/'
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head_pose_weights_filename = head_pose_model_dir + 'head-pose-estimation-adas-0001.bin'
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head_pose_config_filename = head_pose_model_dir + 'head-pose-estimation-adas-0001.xml'
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self.head_pose_model = cv2.dnn.readNet(head_pose_weights_filename, head_pose_config_filename)
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if use_neural_compute_stick:
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print('Not attempting to use a Intel Neural Compute Stick 2 for head pose estimation due to potential errors.')
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dm.print_model_info(self.head_pose_model, 'head_pose_model')
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landmarks_model_dir = models_dir + '/open_model_zoo/facial-landmarks-35-adas-0002/FP32/'
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landmarks_weights_filename = landmarks_model_dir + 'facial-landmarks-35-adas-0002.bin'
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landmarks_config_filename = landmarks_model_dir + 'facial-landmarks-35-adas-0002.xml'
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self.landmarks_model = cv2.dnn.readNet(landmarks_weights_filename, landmarks_config_filename)
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if use_neural_compute_stick:
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print('Not attempting to use a Intel Neural Compute Stick 2 for facial landmarks due to potential errors.')
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dm.print_model_info(self.head_pose_model, 'head_pose_model')
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dm.print_model_info(self.landmarks_model, 'landmarks_model')
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self.landmark_names = ['right_eye_left', 'right_eye_right',
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'left_eye_right', 'left_eye_left', 'nose_tip',
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'nose_bottom', 'nose_right', 'nose_left', 'mouth_right',
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'mouth_left', 'mouth_top', 'mouth_bottom',
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'right_eyebrow_right', 'right_eyebrow_middle', 'right_eyebrow_left',
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'left_eyebrow_right', 'left_eyebrow_middle', 'left_eyebrow_left',
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'right_cheek_18', 'right_cheek_19', 'right_cheek_20', 'right_cheek_21',
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'right_cheek_22', 'right_cheek_23', 'right_cheek_24',
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'chin_right', 'chin_middle', 'chin_left',
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'left_cheek_28', 'left_cheek_29', 'left_cheek_30', 'left_cheek_31',
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'left_cheek_32', 'left_cheek_33', 'left_cheek_34']
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def get_landmark_names(self):
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return self.landmark_names
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def get_landmark_colors(self):
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return None
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def get_landmark_color_dict(self):
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return None
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def detect_faces(self, rgb_image):
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orig_h, orig_w, c = rgb_image.shape
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face_image = rgb_image
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rot_h, rot_w, c = face_image.shape
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# Assumes that the width is smaller than the height, and crop
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# a width x width square image from the top.
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square_face_image = face_image[:rot_w, :, :]
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sqr_h, sqr_w, c = square_face_image.shape
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network_image = cv2.resize(square_face_image, (300, 300))
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# Some magic numbers came from
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# https://www.pyimagesearch.com/2018/02/26/face-detection-with-opencv-and-deep-learning/
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face_image_blob = cv2.dnn.blobFromImage(network_image, 1.0, (300, 300), (104.0, 177.0, 123.0))
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self.head_detection_model.setInput(face_image_blob)
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face_detections = self.head_detection_model.forward()[0,0,:,:]
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confidence_mask = face_detections[:, 2] > self.face_confidence_threshold
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face_detections = face_detections[confidence_mask]
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coordinates = face_detections[:, 3:7]
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# Scale and rotate coordinates to the original image
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coordinates = coordinates * np.array([sqr_w, sqr_h, sqr_w, sqr_h])
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face_id = 0
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boxes = []
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for x0, y0, x1, y1 in coordinates:
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orig_y0 = y0
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orig_y1 = y1
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orig_x0 = x0
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orig_x1 = x1
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face_id += 1
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bounding_box = [orig_x0, orig_y0, orig_x1, orig_y1]
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boxes.append(bounding_box)
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return boxes
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def get_sub_image(self, rgb_image, bounding_box, enlarge_box=True, enlarge_scale=1.15):
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if enlarge_box:
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scale = enlarge_scale
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orig_h, orig_w, c = rgb_image.shape
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x0 = bounding_box[0]
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y0 = bounding_box[1]
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x1 = bounding_box[2]
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y1 = bounding_box[3]
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m_x = (x1 + x0) / 2.0
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m_y = (y1 + y0) / 2.0
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b_w = x1 - x0
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b_h = y1 - y0
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b_w = scale * b_w
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b_h = scale * b_h
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x0 = int(round(m_x - (b_w/2.0)))
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x1 = int(round(m_x + (b_w/2.0)))
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y0 = int(round(m_y - (b_h/2.0)))
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y1 = int(round(m_y + (b_h/2.0)))
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x0 = max(0, x0)
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x1 = min(orig_w, x1)
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y0 = max(0, y0)
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y1 = min(orig_h, y1)
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else:
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x0 = int(round(bounding_box[0]))
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y0 = int(round(bounding_box[1]))
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x1 = int(round(bounding_box[2]))
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y1 = int(round(bounding_box[3]))
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actual_bounding_box = [x0, y0, x1, y1]
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image_to_crop = rgb_image
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sub_image = image_to_crop[y0:y1, x0:x1, :]
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return sub_image, actual_bounding_box
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def estimate_head_pose(self, rgb_image, bounding_box, enlarge_box=True, enlarge_scale=1.15):
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face_crop_image, actual_bounding_box = self.get_sub_image(rgb_image, bounding_box, enlarge_box=enlarge_box, enlarge_scale=enlarge_scale)
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sqr_h, sqr_w, c = face_crop_image.shape
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if (sqr_h > 0) and (sqr_w > 0):
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head_pose_image_blob = cv2.dnn.blobFromImage(face_crop_image,
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size=(60, 60),
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swapRB=False,
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crop=False,
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ddepth=cv2.CV_32F)
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self.head_pose_model.setInput(head_pose_image_blob)
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head_pose_out = self.head_pose_model.forward(['angle_r_fc', 'angle_p_fc', 'angle_y_fc'])
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rpy = head_pose_out
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roll = rpy[0][0][0]
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pitch = rpy[1][0][0]
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yaw = rpy[2][0][0]
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pitch = pitch * np.pi/180.0
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roll = roll * np.pi/180.0
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yaw = yaw * np.pi/180.0
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return yaw, pitch, roll
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return None, None, None
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def detect_facial_landmarks(self, rgb_image, bounding_box, enlarge_box=True, enlarge_scale=1.15):
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face_crop_image, actual_bounding_box = self.get_sub_image(rgb_image, bounding_box, enlarge_box=enlarge_box, enlarge_scale=enlarge_scale)
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sqr_h, sqr_w, c = face_crop_image.shape
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if (sqr_h > 0) and (sqr_w > 0):
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landmarks_image_blob = cv2.dnn.blobFromImage(face_crop_image,
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size=(60, 60),
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swapRB=False,
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crop=False,
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ddepth=cv2.CV_32F)
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self.landmarks_model.setInput(landmarks_image_blob)
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landmarks_out = self.landmarks_model.forward()
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s = landmarks_out.shape
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out = np.reshape(landmarks_out[0], (s[1]//2, 2))
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x0, y0, x1, y1 = actual_bounding_box
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landmarks = {}
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for n, v in enumerate(out):
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x = int(round((v[0] * sqr_w) + x0))
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y = int(round((v[1] * sqr_h) + y0))
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name = self.landmark_names[n]
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landmarks[name] = (x,y)
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return landmarks, self.landmark_names.copy()
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return None, None
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def draw_bounding_box(self, image, bounding_box):
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x0 = int(round(bounding_box[0]))
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y0 = int(round(bounding_box[1]))
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x1 = int(round(bounding_box[2]))
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y1 = int(round(bounding_box[3]))
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color = (0, 0, 255)
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thickness = 2
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cv2.rectangle(image, (x0, y0), (x1, y1), color, thickness)
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def draw_head_pose(self, image, yaw, pitch, roll, bounding_box):
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x0, y0, x1, y1 = bounding_box
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face_x = (x1 + x0) / 2.0
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face_y = (y1 + y0) / 2.0
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#
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# opencv uses right-handed coordinate system
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# x points to the right of the image
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# y points to the bottom of the image
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# z points into the image
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#
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h, w, c = image.shape
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camera_center = (w/2.0, h/2.0)
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#For rendering with an unknown camera
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focal_length = 50.0
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camera_matrix = np.array([[focal_length, 0.0, camera_center[0]],
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[0.0, focal_length, camera_center[1]],
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[0.0, 0.0, 1.0]])
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face_translation = np.array([0.0, 0.0, 3000.0])
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distortion_coefficients = np.array([0.0, 0.0, 0.0, 0.0])
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# negate the directions of the y and z axes
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axes = np.array([[2000.0, 0.0, 0.0 ],
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[0.0, -2000.0, 0.0 ],
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[0.0, 0.0, -2000.0],
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[0.0, 0.0, 0.0 ]])
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head_ypr = np.array([-yaw, pitch, roll])
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rotation_mat = Rotation.from_euler('yxz', head_ypr).as_dcm()
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rotation_vec, jacobian = cv2.Rodrigues(rotation_mat)
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image_points, jacobian = cv2.projectPoints(axes, rotation_vec, face_translation, camera_matrix, distortion_coefficients)
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face_pix = np.array([face_x, face_y])
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origin = image_points[3].ravel()
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x_axis = (image_points[0].ravel() - origin) + face_pix
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y_axis = (image_points[1].ravel() - origin) + face_pix
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z_axis = (image_points[2].ravel() - origin) + face_pix
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p0 = tuple(np.int32(np.round(face_pix)))
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p1 = tuple(np.int32(np.round(x_axis)))
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cv2.line(image, p0, p1, (0, 0, 255), 2)
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p1 = tuple(np.int32(np.round(y_axis)))
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cv2.line(image, p0, p1, (0, 255, 0), 2)
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p1 = tuple(np.int32(np.round(z_axis)))
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cv2.line(image, p0, p1, (255, 0, 0), 2)
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def draw_landmarks(self, image, landmarks):
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for name, xy in landmarks.items():
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x = xy[0]
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y = xy[1]
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if 'mouth' in name:
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color = (255, 0, 0)
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elif 'nose' in name:
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color = (0, 255, 0)
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elif 'eyebrow' in name:
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color = (0, 0, 0)
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elif 'right_eye' in name:
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color = (255, 255, 0)
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elif 'left_eye' in name:
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color = (0, 255, 255)
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elif 'chin' in name:
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color = (255, 0, 255)
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else:
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color = (0, 0, 255)
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cv2.circle(image, (x,y), 2, color, 1)
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font_scale = 1.0
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line_color = [0, 0, 0]
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line_width = 1
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font = cv2.FONT_HERSHEY_PLAIN
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def apply_to_image(self, rgb_image, draw_output=False):
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if draw_output:
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output_image = rgb_image.copy()
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else:
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output_image = None
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heads = []
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boxes = self.detect_faces(rgb_image)
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facial_landmark_names = self.landmark_names.copy()
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for bounding_box in boxes:
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if draw_output:
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self.draw_bounding_box(output_image, bounding_box)
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yaw, pitch, roll = self.estimate_head_pose(rgb_image, bounding_box, enlarge_box=True, enlarge_scale=1.15)
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if yaw is not None:
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ypr = (yaw, pitch, roll)
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if draw_output:
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self.draw_head_pose(output_image, yaw, pitch, roll, bounding_box)
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else:
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ypr = None
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landmarks, landmark_names = self.detect_facial_landmarks(rgb_image, bounding_box, enlarge_box=True, enlarge_scale=1.15)
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if (landmarks is not None) and draw_output:
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self.draw_landmarks(output_image, landmarks)
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heads.append({'box':bounding_box, 'ypr':ypr, 'landmarks':landmarks})
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return heads, output_image
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