Im using this code to detect teh 468 facial landmarks from a face:
import cv2
import mediapipe as mp
import time
cap = cv2.VideoCapture(0)
pTime = 0
mpDraw = mp.solutions.drawing_utils
mpFaceMesh = mp.solutions.face_mesh
faceMesh = mpFaceMesh.FaceMesh(max_num_faces=2)
drawSpec = mpDraw.DrawingSpec(thickness=1, circle_radius=2)
while True:
success, img = cap.read()
imgRGB = cv2.cvtColor(img, cv2.COLOR_BGR2RGB)
results = faceMesh.process(imgRGB)
if results.multi_face_landmarks:
for faceLms in results.multi_face_landmarks:
mpDraw.draw_landmarks(img, faceLms, mpFaceMesh.FACEMESH_CONTOURS,
drawSpec,drawSpec)
for id,lm in enumerate(faceLms.landmark):
#print(lm)
ih, iw, ic = img.shape
x,y = int(lm.x*iw), int(lm.y*ih)
print(id,x,y)
cTime = time.time()
fps = 1 / (cTime - pTime)
pTime = cTime
cv2.putText(img, f'FPS: {int(fps)}', (20, 70), cv2.FONT_HERSHEY_PLAIN,
3, (255, 0, 0), 3)
cv2.imshow("Image", img)
cv2.waitKey(1)
When I run this script, I can see the facial landmarks printed on my face, but what I want to achieve is that I display the facial landmarks on a black background without actually showing a face.
How can I achieve that?
You can create an image with dark (black) pixels (0) of the same dimensions of the frame captured by the camera. And carry out your drawings there
# create the dark image
black = np.zeros(img.shape , np.uint8)
# Replace the `img` with `black` while drawing the landmarks
mpDraw.draw_landmarks(black, faceLms, mpFaceMesh.FACEMESH_CONTOURS, drawSpec,drawSpec)
# Display the result
cv2.imshow("Result", black)