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357 lines
No EOL
14 KiB
Python
357 lines
No EOL
14 KiB
Python
import colorsys
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import cv2
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import numpy as np
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from enum import IntEnum
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import mathlib
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from mathlib.umeyama import umeyama
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from utils import image_utils
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from facelib import FaceType
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import math
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mean_face_x = np.array([
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0.000213256, 0.0752622, 0.18113, 0.29077, 0.393397, 0.586856, 0.689483, 0.799124,
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0.904991, 0.98004, 0.490127, 0.490127, 0.490127, 0.490127, 0.36688, 0.426036,
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0.490127, 0.554217, 0.613373, 0.121737, 0.187122, 0.265825, 0.334606, 0.260918,
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0.182743, 0.645647, 0.714428, 0.793132, 0.858516, 0.79751, 0.719335, 0.254149,
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0.340985, 0.428858, 0.490127, 0.551395, 0.639268, 0.726104, 0.642159, 0.556721,
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0.490127, 0.423532, 0.338094, 0.290379, 0.428096, 0.490127, 0.552157, 0.689874,
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0.553364, 0.490127, 0.42689 ])
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mean_face_y = np.array([
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0.106454, 0.038915, 0.0187482, 0.0344891, 0.0773906, 0.0773906, 0.0344891,
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0.0187482, 0.038915, 0.106454, 0.203352, 0.307009, 0.409805, 0.515625, 0.587326,
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0.609345, 0.628106, 0.609345, 0.587326, 0.216423, 0.178758, 0.179852, 0.231733,
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0.245099, 0.244077, 0.231733, 0.179852, 0.178758, 0.216423, 0.244077, 0.245099,
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0.780233, 0.745405, 0.727388, 0.742578, 0.727388, 0.745405, 0.780233, 0.864805,
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0.902192, 0.909281, 0.902192, 0.864805, 0.784792, 0.778746, 0.785343, 0.778746,
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0.784792, 0.824182, 0.831803, 0.824182 ])
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landmarks_2D = np.stack( [ mean_face_x, mean_face_y ], axis=1 )
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# 68 point landmark definitions
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landmarks_68_pt = { "mouth": (48,68),
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"right_eyebrow": (17, 22),
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"left_eyebrow": (22, 27),
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"right_eye": (36, 42),
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"left_eye": (42, 48),
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"nose": (27, 36), # missed one point
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"jaw": (0, 17) }
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landmarks_68_3D = np.array( [
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[-73.393523 , -29.801432 , 47.667532 ],
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[-72.775014 , -10.949766 , 45.909403 ],
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[-70.533638 , 7.929818 , 44.842580 ],
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[-66.850058 , 26.074280 , 43.141114 ],
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[-59.790187 , 42.564390 , 38.635298 ],
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[-48.368973 , 56.481080 , 30.750622 ],
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[-34.121101 , 67.246992 , 18.456453 ],
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[-17.875411 , 75.056892 , 3.609035 ],
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[0.098749 , 77.061286 , -0.881698 ],
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[17.477031 , 74.758448 , 5.181201 ],
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[32.648966 , 66.929021 , 19.176563 ],
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[46.372358 , 56.311389 , 30.770570 ],
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[57.343480 , 42.419126 , 37.628629 ],
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[64.388482 , 25.455880 , 40.886309 ],
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[68.212038 , 6.990805 , 42.281449 ],
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[70.486405 , -11.666193 , 44.142567 ],
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[71.375822 , -30.365191 , 47.140426 ],
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[-61.119406 , -49.361602 , 14.254422 ],
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[-51.287588 , -58.769795 , 7.268147 ],
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[-37.804800 , -61.996155 , 0.442051 ],
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[-24.022754 , -61.033399 , -6.606501 ],
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[-11.635713 , -56.686759 , -11.967398 ],
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[12.056636 , -57.391033 , -12.051204 ],
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[25.106256 , -61.902186 , -7.315098 ],
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[38.338588 , -62.777713 , -1.022953 ],
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[51.191007 , -59.302347 , 5.349435 ],
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[60.053851 , -50.190255 , 11.615746 ],
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[0.653940 , -42.193790 , -13.380835 ],
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[0.804809 , -30.993721 , -21.150853 ],
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[0.992204 , -19.944596 , -29.284036 ],
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[1.226783 , -8.414541 , -36.948060 ],
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[-14.772472 , 2.598255 , -20.132003 ],
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[-7.180239 , 4.751589 , -23.536684 ],
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[0.555920 , 6.562900 , -25.944448 ],
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[8.272499 , 4.661005 , -23.695741 ],
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[15.214351 , 2.643046 , -20.858157 ],
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[-46.047290 , -37.471411 , 7.037989 ],
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[-37.674688 , -42.730510 , 3.021217 ],
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[-27.883856 , -42.711517 , 1.353629 ],
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[-19.648268 , -36.754742 , -0.111088 ],
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[-28.272965 , -35.134493 , -0.147273 ],
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[-38.082418 , -34.919043 , 1.476612 ],
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[19.265868 , -37.032306 , -0.665746 ],
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[27.894191 , -43.342445 , 0.247660 ],
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[37.437529 , -43.110822 , 1.696435 ],
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[45.170805 , -38.086515 , 4.894163 ],
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[38.196454 , -35.532024 , 0.282961 ],
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[28.764989 , -35.484289 , -1.172675 ],
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[-28.916267 , 28.612716 , -2.240310 ],
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[-17.533194 , 22.172187 , -15.934335 ],
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[-6.684590 , 19.029051 , -22.611355 ],
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[0.381001 , 20.721118 , -23.748437 ],
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[8.375443 , 19.035460 , -22.721995 ],
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[18.876618 , 22.394109 , -15.610679 ],
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[28.794412 , 28.079924 , -3.217393 ],
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[19.057574 , 36.298248 , -14.987997 ],
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[8.956375 , 39.634575 , -22.554245 ],
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[0.381549 , 40.395647 , -23.591626 ],
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[-7.428895 , 39.836405 , -22.406106 ],
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[-18.160634 , 36.677899 , -15.121907 ],
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[-24.377490 , 28.677771 , -4.785684 ],
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[-6.897633 , 25.475976 , -20.893742 ],
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[0.340663 , 26.014269 , -22.220479 ],
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[8.444722 , 25.326198 , -21.025520 ],
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[24.474473 , 28.323008 , -5.712776 ],
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[8.449166 , 30.596216 , -20.671489 ],
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[0.205322 , 31.408738 , -21.903670 ],
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[-7.198266 , 30.844876 , -20.328022 ] ], dtype=np.float32)
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def get_transform_mat (image_landmarks, output_size, face_type, scale=1.0):
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if not isinstance(image_landmarks, np.ndarray):
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image_landmarks = np.array (image_landmarks)
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if face_type == FaceType.AVATAR:
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centroid = np.mean (image_landmarks, axis=0)
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mat = umeyama(image_landmarks[17:], landmarks_2D, True)[0:2]
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a, c = mat[0,0], mat[1,0]
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scale = math.sqrt((a * a) + (c * c))
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padding = (output_size / 64) * 32
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mat = np.eye ( 2,3 )
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mat[0,2] = -centroid[0]
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mat[1,2] = -centroid[1]
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mat = mat * scale * (output_size / 3)
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mat[:,2] += output_size / 2
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else:
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if face_type == FaceType.HALF:
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padding = 0
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elif face_type == FaceType.FULL:
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padding = (output_size / 64) * 12
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elif face_type == FaceType.HEAD:
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padding = (output_size / 64) * 24
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else:
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raise ValueError ('wrong face_type: ', face_type)
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mat = umeyama(image_landmarks[17:], landmarks_2D, True)[0:2]
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mat = mat * (output_size - 2 * padding)
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mat[:,2] += padding
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mat *= (1 / scale)
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mat[:,2] += -output_size*( ( (1 / scale) - 1.0 ) / 2 )
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return mat
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def transform_points(points, mat, invert=False):
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if invert:
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mat = cv2.invertAffineTransform (mat)
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points = np.expand_dims(points, axis=1)
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points = cv2.transform(points, mat, points.shape)
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points = np.squeeze(points)
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return points
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def get_image_hull_mask (image_shape, image_landmarks):
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if len(image_landmarks) != 68:
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raise Exception('get_image_hull_mask works only with 68 landmarks')
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hull_mask = np.zeros(image_shape[0:2]+(1,),dtype=np.float32)
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cv2.fillConvexPoly( hull_mask, cv2.convexHull(
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np.concatenate ( (image_landmarks[0:9],
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image_landmarks[17:18]))) , (1,) )
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cv2.fillConvexPoly( hull_mask, cv2.convexHull(
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np.concatenate ( (image_landmarks[8:17],
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image_landmarks[26:27]))) , (1,) )
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cv2.fillConvexPoly( hull_mask, cv2.convexHull(
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np.concatenate ( (image_landmarks[17:20],
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image_landmarks[8:9]))) , (1,) )
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cv2.fillConvexPoly( hull_mask, cv2.convexHull(
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np.concatenate ( (image_landmarks[24:27],
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image_landmarks[8:9]))) , (1,) )
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cv2.fillConvexPoly( hull_mask, cv2.convexHull(
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np.concatenate ( (image_landmarks[19:25],
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image_landmarks[8:9],
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))) , (1,) )
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cv2.fillConvexPoly( hull_mask, cv2.convexHull(
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np.concatenate ( (image_landmarks[17:22],
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image_landmarks[27:28],
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image_landmarks[31:36],
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image_landmarks[8:9]
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))) , (1,) )
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cv2.fillConvexPoly( hull_mask, cv2.convexHull(
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np.concatenate ( (image_landmarks[22:27],
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image_landmarks[27:28],
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image_landmarks[31:36],
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image_landmarks[8:9]
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))) , (1,) )
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#nose
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cv2.fillConvexPoly( hull_mask, cv2.convexHull(image_landmarks[27:36]), (1,) )
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return hull_mask
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def get_image_eye_mask (image_shape, image_landmarks):
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if len(image_landmarks) != 68:
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raise Exception('get_image_eye_mask works only with 68 landmarks')
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hull_mask = np.zeros(image_shape[0:2]+(1,),dtype=np.float32)
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cv2.fillConvexPoly( hull_mask, cv2.convexHull( image_landmarks[36:42]), (1,) )
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cv2.fillConvexPoly( hull_mask, cv2.convexHull( image_landmarks[42:48]), (1,) )
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return hull_mask
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def get_image_hull_mask_3D (image_shape, image_landmarks):
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result = get_image_hull_mask(image_shape, image_landmarks)
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return np.repeat ( result, (3,), -1 )
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def blur_image_hull_mask (hull_mask):
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maxregion = np.argwhere(hull_mask==1.0)
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miny,minx = maxregion.min(axis=0)[:2]
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maxy,maxx = maxregion.max(axis=0)[:2]
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lenx = maxx - minx;
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leny = maxy - miny;
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masky = int(minx+(lenx//2))
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maskx = int(miny+(leny//2))
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lowest_len = min (lenx, leny)
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ero = int( lowest_len * 0.085 )
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blur = int( lowest_len * 0.10 )
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hull_mask = cv2.erode(hull_mask, cv2.getStructuringElement(cv2.MORPH_ELLIPSE,(ero,ero)), iterations = 1 )
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hull_mask = cv2.blur(hull_mask, (blur, blur) )
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hull_mask = np.expand_dims (hull_mask,-1)
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return hull_mask
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def get_blurred_image_hull_mask(image_shape, image_landmarks):
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return blur_image_hull_mask ( get_image_hull_mask(image_shape, image_landmarks) )
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mirror_idxs = [
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[0,16],
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[1,15],
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[2,14],
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[3,13],
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[4,12],
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[5,11],
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[6,10],
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[7,9],
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[17,26],
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[18,25],
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[19,24],
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[20,23],
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[21,22],
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[36,45],
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[37,44],
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[38,43],
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[39,42],
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[40,47],
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[41,46],
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[31,35],
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[32,34],
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[50,52],
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[49,53],
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[48,54],
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[59,55],
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[58,56],
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[67,65],
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[60,64],
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[61,63] ]
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def mirror_landmarks (landmarks, val):
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result = landmarks.copy()
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for idx in mirror_idxs:
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result [ idx ] = result [ idx[::-1] ]
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result[:,0] = val - result[:,0] - 1
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return result
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def draw_landmarks (image, image_landmarks, color=(0,255,0), transparent_mask=False):
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image = image.copy()
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if len(image_landmarks) != 68:
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raise Exception('get_image_eye_mask works only with 68 landmarks')
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jaw = image_landmarks[slice(*landmarks_68_pt["jaw"])]
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right_eyebrow = image_landmarks[slice(*landmarks_68_pt["right_eyebrow"])]
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left_eyebrow = image_landmarks[slice(*landmarks_68_pt["left_eyebrow"])]
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mouth = image_landmarks[slice(*landmarks_68_pt["mouth"])]
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right_eye = image_landmarks[slice(*landmarks_68_pt["right_eye"])]
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left_eye = image_landmarks[slice(*landmarks_68_pt["left_eye"])]
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nose = image_landmarks[slice(*landmarks_68_pt["nose"])]
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# open shapes
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cv2.polylines(image, tuple(np.array([v]) for v in ( right_eyebrow, jaw, left_eyebrow, np.concatenate((nose, [nose[-6]])) )),
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False, color, lineType=cv2.LINE_AA)
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# closed shapes
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cv2.polylines(image, tuple(np.array([v]) for v in (right_eye, left_eye, mouth)),
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True, color, lineType=cv2.LINE_AA)
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# the rest of the cicles
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for x, y in np.concatenate((right_eyebrow, left_eyebrow, mouth, right_eye, left_eye, nose), axis=0):
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cv2.circle(image, (x, y), 1, color, 1, lineType=cv2.LINE_AA)
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# jaw big circles
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for x, y in jaw:
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cv2.circle(image, (x, y), 2, color, lineType=cv2.LINE_AA)
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if transparent_mask:
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mask = get_image_hull_mask (image.shape, image_landmarks)
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image = image * (1-mask) + image * mask / 2
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return image
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def draw_rect_landmarks (image, rect, image_landmarks, face_size, face_type, transparent_mask=False):
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image = draw_landmarks(image, image_landmarks, transparent_mask=transparent_mask)
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image_utils.draw_rect (image, rect, (255,0,0), 2 )
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image_to_face_mat = get_transform_mat (image_landmarks, face_size, face_type)
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points = transform_points ( [ (0,0), (0,face_size-1), (face_size-1, face_size-1), (face_size-1,0) ], image_to_face_mat, True)
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image_utils.draw_polygon (image, points, (0,0,255), 2)
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return image
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def calc_face_pitch(landmarks):
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if not isinstance(landmarks, np.ndarray):
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landmarks = np.array (landmarks)
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t = ( (landmarks[6][1]-landmarks[8][1]) + (landmarks[10][1]-landmarks[8][1]) ) / 2.0
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b = landmarks[8][1]
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return float(b-t)
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def calc_face_yaw(landmarks):
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if not isinstance(landmarks, np.ndarray):
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landmarks = np.array (landmarks)
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l = ( (landmarks[27][0]-landmarks[0][0]) + (landmarks[28][0]-landmarks[1][0]) + (landmarks[29][0]-landmarks[2][0]) ) / 3.0
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r = ( (landmarks[16][0]-landmarks[27][0]) + (landmarks[15][0]-landmarks[28][0]) + (landmarks[14][0]-landmarks[29][0]) ) / 3.0
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return float(r-l)
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#returns pitch,yaw [-1...+1]
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def estimate_pitch_yaw(aligned_256px_landmarks):
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shape = (256,256)
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focal_length = shape[1]
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camera_center = (shape[1] / 2, shape[0] / 2)
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camera_matrix = np.array(
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[[focal_length, 0, camera_center[0]],
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[0, focal_length, camera_center[1]],
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[0, 0, 1]], dtype=np.float32)
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(_, rotation_vector, translation_vector) = cv2.solvePnP(
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landmarks_68_3D,
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aligned_256px_landmarks.astype(np.float32),
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camera_matrix,
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np.zeros((4, 1)) )
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pitch, yaw, _ = mathlib.rotationMatrixToEulerAngles( cv2.Rodrigues(rotation_vector)[0] )
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pitch = np.clip ( pitch*1.25, -1.0, 1.0 )
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yaw = np.clip ( yaw*1.25, -1.0, 1.0 )
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return pitch, yaw |