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[英]When i run this command " cascPath = sys.argv[1] " i get error IndexError: list index out of range
[英]Iam having trouble with Python command “ cascPath = sys.argv[1] ” i get error IndexError: list index out of range
我正在使用Raspberry Pi 3 Model B,安裝了Raspbian,opencv 2.x和Python 3。
我想訪問我的USB網絡攝像頭並用它拍照。 我發現了很多代碼,但是沒有任何用處。 我發現一個更好,但是當我運行命令時
cascPath = sys.argv[1]
我得到了錯誤
追溯(最近一次通話):
文件“ /home/pi/test.py”,第4行,在
cascPath = sys.argv[1]
IndexError:列表索引超出范圍
我只需要訪問網絡攝像頭即可拍照。
我正在使用以下代碼:
import cv2
import sys
cascPath = sys.argv[1]
faceCascade = cv2.CascadeClassifier(cascPath)
video_capture = cv2.VideoCapture(0)
while True:
# Capture frame-by-frame
ret, frame = video_capture.read()
gray = cv2.cvtColor(frame, cv2.COLOR_BGR2GRAY)
faces = faceCascade.detectMultiScale(
gray,
scaleFactor=1.1,
minNeighbors=5,
minSize=(30, 30),
flags=cv2.cv.CV_HAAR_SCALE_IMAGE
)
# Draw a rectangle around the faces
for (x, y, w, h) in faces:
cv2.rectangle(frame, (x, y), (x+w, y+h), (0, 255, 0), 2)
# Display the resulting frame
cv2.imshow('Video', frame)
if cv2.waitKey(1) & 0xFF == ord('q'):
break
#When everything is done, release the capture
video_capture.release()
這段代碼嘗試識別圖像上的面孔,並且sys.argv[1]
期望您運行帶有XML文件路徑的腳本來幫助識別面孔。
如果您不想識別人臉,則只需此代碼即可在攝像機的監視器視頻上顯示。
import cv2
import sys
video_capture = cv2.VideoCapture(0)
while True:
# Capture frame-by-frame
ret, frame = video_capture.read()
# Display the resulting frame
cv2.imshow('Video', frame)
# exit if you press key `q`
if cv2.waitKey(1) & 0xFF == ord('q'):
break
#When everything is done, release the capture
video_capture.release()
或此保存圖像
import cv2
video_capture = cv2.VideoCapture(0)
# Capture frame
ret, frame = video_capture.read()
# Write frame in file
cv2.imwrite('image.jpg', frame)
# When everything is done, release the capture
video_capture.release()
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