camera demos seem to fail due to not finding imports?

Robotics & Edge Computing Jetson & Embedded Systems Jetson Nano
7

Ok back to basics…
I know this works… But not on the Nano?

#https://github.com/Itseez/opencv/blob/master/data/haarcascades/haarcascade_frontalface_default.xml
face_cascade = cv2.CascadeClassifier(‘haarcascade_frontalface_default.xml’)
#https://github.com/Itseez/opencv/blob/master/data/haarcascades/haarcascade_eye.xml
eye_cascade = cv2.CascadeClassifier(‘haarcascade_eye.xml’)

cap = cv2.VideoCapture(0)

while 1:
ret, img = cap.read()[b][/b]
gray = cv2.cvtColor(img, cv2.COLOR_BGR2GRAY)
faces = face_cascade.detectMultiScale(gray, 1.3, 5)

for (x,y,w,h) in faces:
    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('img',img)
k = cv2.waitKey(30) & 0xff
if k == 27:
    break

cap.release()
cv2.destroyAllWindows()

It gets an error when running faces = face_cascade
image is good as I have taken out the face/eye detect.
gray image is fine…

I can probably make some progress if I can get this simple program to work.
regards,
John