opencv face detect

 

 

import cv2 dirname = '/home/user/.local/lib/python3.6/site-packages/cv2/data/' face_cascade = cv2.CascadeClassifier(dirname + 'haarcascade_frontalface_default.xml') eye_cascade = cv2.CascadeClassifier(dirname + 'haarcascade_eye.xml') cam = cv2.VideoCapture(0) cam.set(3, 160) # CV_CAP_PROP_FRAME_WIDTH cam.set(4, 120) # CV_CAP_PROP_FRAME_HEIGHT cam.set(5, 60) # CV_CAP_PROP_FPS print(cam.get(3)) print(cam.get(4)) print(cam.get(5)) while True: ret_val, img = cam.read() gray = cv2.cvtColor(img, cv2.COLOR_BGR2GRAY) faces = face_cascade.detectMultiScale(gray, 1.3, 5) print(faces) for (x, y, w, h) in faces: img = cv2.rectangle(img, (x, y), (x+w, y+h), (255, 0, 0), 2) roi_gray = gray[y:y+h, x:x+w] roi_color = img[y:y+h, x:x+w] eyes = eye_cascade.detectMultiScale(roi_gray) for (ex, ey, ew, eh) in eyes: cv2.rectangle(roi_color, (ex, ey), (ex+ew, ey+eh), (0, 255, 0), 2) cv2.imshow("Cam Viewer", img) cv2.imshow("Cam Viewer gray", gray) if cv2.waitKey(1) == 27: break

[링크 : https://opencv-python-tutroals.readthedocs.io/.../py_face_detection/py_face_detection.html]

[링크 : https://stackoverflow.com/questions/30508922/error-215-empty-in-function-detectmultiscale]

 

+

2025.08.04

import cv2
import time

dirname = '/home/falinux/.local/lib/python3.10/site-packages/cv2/data/'

face_cascade = cv2.CascadeClassifier(dirname + 'haarcascade_frontalface_default.xml')
eye_cascade = cv2.CascadeClassifier(dirname + 'haarcascade_eye.xml')

cam = cv2.VideoCapture(0)
# cam.set(3, 160) # CV_CAP_PROP_FRAME_WIDTH
# cam.set(4, 120) # CV_CAP_PROP_FRAME_HEIGHT
cam.set(5, 20) # CV_CAP_PROP_FPS
# print(cam.get(3))
# print(cam.get(4))
print(cam.get(5))

while True:
 ret_val, img = cam.read()
 gray = cv2.cvtColor(img, cv2.COLOR_BGR2GRAY)
 
 faces = face_cascade.detectMultiScale(gray, 1.05, 5)
 print(faces)
 for (x, y, w, h) in faces:
  img = cv2.rectangle(img, (x, y), (x+w, y+h), (255, 0, 0), 2)
  roi_gray = gray[y:y+h, x:x+w]
  roi_color = img[y:y+h, x:x+w]
  eyes = eye_cascade.detectMultiScale(roi_gray)
  for (ex, ey, ew, eh) in eyes:
   cv2.rectangle(roi_color, (ex, ey), (ex+ew, ey+eh), (0, 255, 0), 2)

 time.sleep(0.15)
 cv2.imshow("Cam Viewer", img)
#  cv2.imshow("Cam Viewer gray", gray)
 if cv2.waitKey(1) == 27:
     break