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realtime_face_swapping.py
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realtime_face_swapping.py
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import cv2
import numpy as np
import dlib
import time
def extract_index_nparray(nparray):
index = None
for num in nparray[0]:
index = num
break
return index
img = cv2.imread("jim_carrey.jpg")
img_gray = cv2.cvtColor(img, cv2.COLOR_BGR2GRAY)
mask = np.zeros_like(img_gray)
cap = cv2.VideoCapture(0)
detector = dlib.get_frontal_face_detector()
predictor = dlib.shape_predictor("shape_predictor_68_face_landmarks.dat")
indexes_triangles = []
# Face 1
faces = detector(img_gray)
for face in faces:
landmarks = predictor(img_gray, face)
landmarks_points = []
for n in range(0, 68):
x = landmarks.part(n).x
y = landmarks.part(n).y
landmarks_points.append((x, y))
# cv2.circle(img, (x, y), 3, (0, 0, 255), -1)
points = np.array(landmarks_points, np.int32)
convexhull = cv2.convexHull(points)
# cv2.polylines(img, [convexhull], True, (255, 0, 0), 3)
cv2.fillConvexPoly(mask, convexhull, 255)
face_image_1 = cv2.bitwise_and(img, img, mask=mask)
# Delaunay triangulation
rect = cv2.boundingRect(convexhull)
subdiv = cv2.Subdiv2D(rect)
subdiv.insert(landmarks_points)
triangles = subdiv.getTriangleList()
triangles = np.array(triangles, dtype=np.int32)
indexes_triangles = []
for t in triangles:
pt1 = (t[0], t[1])
pt2 = (t[2], t[3])
pt3 = (t[4], t[5])
index_pt1 = np.where((points == pt1).all(axis=1))
index_pt1 = extract_index_nparray(index_pt1)
index_pt2 = np.where((points == pt2).all(axis=1))
index_pt2 = extract_index_nparray(index_pt2)
index_pt3 = np.where((points == pt3).all(axis=1))
index_pt3 = extract_index_nparray(index_pt3)
if index_pt1 is not None and index_pt2 is not None and index_pt3 is not None:
triangle = [index_pt1, index_pt2, index_pt3]
indexes_triangles.append(triangle)
while True:
_, img2 = cap.read()
img2_gray = cv2.cvtColor(img2, cv2.COLOR_BGR2GRAY)
img2_new_face = np.zeros_like(img2)
# Face 2
faces2 = detector(img2_gray)
for face in faces2:
landmarks = predictor(img2_gray, face)
landmarks_points2 = []
for n in range(0, 68):
x = landmarks.part(n).x
y = landmarks.part(n).y
landmarks_points2.append((x, y))
# cv2.circle(img2, (x, y), 3, (0, 255, 0), -1)
points2 = np.array(landmarks_points2, np.int32)
convexhull2 = cv2.convexHull(points2)
lines_space_mask = np.zeros_like(img_gray)
lines_space_new_face = np.zeros_like(img2)
# Triangulation of both faces
for triangle_index in indexes_triangles:
# Triangulation of the first face
tr1_pt1 = landmarks_points[triangle_index[0]]
tr1_pt2 = landmarks_points[triangle_index[1]]
tr1_pt3 = landmarks_points[triangle_index[2]]
triangle1 = np.array([tr1_pt1, tr1_pt2, tr1_pt3], np.int32)
rect1 = cv2.boundingRect(triangle1)
(x, y, w, h) = rect1
cropped_triangle = img[y: y + h, x: x + w]
cropped_tr1_mask = np.zeros((h, w), np.uint8)
points = np.array([[tr1_pt1[0] - x, tr1_pt1[1] - y],
[tr1_pt2[0] - x, tr1_pt2[1] - y],
[tr1_pt3[0] - x, tr1_pt3[1] - y]], np.int32)
cv2.fillConvexPoly(cropped_tr1_mask, points, 255)
# Triangulation of second face
tr2_pt1 = landmarks_points2[triangle_index[0]]
tr2_pt2 = landmarks_points2[triangle_index[1]]
tr2_pt3 = landmarks_points2[triangle_index[2]]
triangle2 = np.array([tr2_pt1, tr2_pt2, tr2_pt3], np.int32)
rect2 = cv2.boundingRect(triangle2)
(x, y, w, h) = rect2
cropped_tr2_mask = np.zeros((h, w), np.uint8)
points2 = np.array([[tr2_pt1[0] - x, tr2_pt1[1] - y],
[tr2_pt2[0] - x, tr2_pt2[1] - y],
[tr2_pt3[0] - x, tr2_pt3[1] - y]], np.int32)
cv2.fillConvexPoly(cropped_tr2_mask, points2, 255)
# Warp triangles
points = np.float32(points)
points2 = np.float32(points2)
M = cv2.getAffineTransform(points, points2)
warped_triangle = cv2.warpAffine(cropped_triangle, M, (w, h))
warped_triangle = cv2.bitwise_and(warped_triangle, warped_triangle, mask=cropped_tr2_mask)
# Reconstructing destination face
img2_new_face_rect_area = img2_new_face[y: y + h, x: x + w]
img2_new_face_rect_area_gray = cv2.cvtColor(img2_new_face_rect_area, cv2.COLOR_BGR2GRAY)
_, mask_triangles_designed = cv2.threshold(img2_new_face_rect_area_gray, 1, 255, cv2.THRESH_BINARY_INV)
warped_triangle = cv2.bitwise_and(warped_triangle, warped_triangle, mask=mask_triangles_designed)
img2_new_face_rect_area = cv2.add(img2_new_face_rect_area, warped_triangle)
img2_new_face[y: y + h, x: x + w] = img2_new_face_rect_area
# Face swapped (putting 1st face into 2nd face)
img2_face_mask = np.zeros_like(img2_gray)
img2_head_mask = cv2.fillConvexPoly(img2_face_mask, convexhull2, 255)
img2_face_mask = cv2.bitwise_not(img2_head_mask)
img2_head_noface = cv2.bitwise_and(img2, img2, mask=img2_face_mask)
result = cv2.add(img2_head_noface, img2_new_face)
(x, y, w, h) = cv2.boundingRect(convexhull2)
center_face2 = (int((x + x + w) / 2), int((y + y + h) / 2))
seamlessclone = cv2.seamlessClone(result, img2, img2_head_mask, center_face2, cv2.MIXED_CLONE)
cv2.imshow("img2", img2)
cv2.imshow("clone", seamlessclone)
cv2.imshow("result", result)
key = cv2.waitKey(1)
if key == 27:
break
cap.release()
cv2.destroyAllWindows()