CameraCalibration with Open CV

Question

I try to calibrate a camera with python and opnecv. I use a video-file instead of a webcam live stream.

Everything seems to work except of the last step. This is:

print "now get ready, camera is switching on"
while(1):
    image=cv.QueryFrame(capture)
            t = cv.CloneImage(image);
    cv.ShowImage( "Calibration", image )
    cv.Remap( t, image, mapx, mapy )
    cv.ShowImage("Undistort", image)
    c = cv.WaitKey(33)
    if(c == 1048688):       # enter 'p' key to pause for some time
        cv.WaitKey(2000)
    elif c==1048603:        # enter esc key to exit
        break

print "everything is fine"

There I receive following error:

Traceback (most recent call last):
  File "V:\Studenten\Christian_Fuerstenhoefer\02_Kamerakalibrierung\openCV\camCalib.py", line 137, in <module>
    t = cv.CloneImage(image);
TypeError: Argument 'image' must be IplImage

I already checked print type (image). Then it says None.

Does anyone know how to fix this problem?

Thanks for your help.

Does it show at least one image? say the first one? – Acorbe Apr 16 '13 at 13:56 — Acorbe, Apr 16 '13 at 13:56

score 0 · Answer 1 · answered Apr 16 '13 at 09:28

0

you don't check for the end of the stream ( each video has an end..)

while(1):
    image=cv.QueryFrame(capture)
    if image==None:
        break

answered Apr 16 '13 at 09:28

berak

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CameraCalibration with Open CV

1 Answers1