Dadam Dadam - 6 months ago 48
Python Question

opencv warpPerspective parameter count

In my script I have the following code:

src = numpy.array(cornersSheet, numpy.float32)
dst = numpy.array(cornersDesired, numpy.float32)
transform = cv2.getPerspectiveTransform(src,dst)
finished = cv2.warpPerspective(img, transform, img.shape)


Python says:

Traceback (most recent call last):
File "./script.py", line 138, in <module>
finished = cv2.warpPerspective(img, transform, img.shape)
TypeError: function takes exactly 2 arguments (3 given)


but according to documentation:

Python: cv2.warpPerspective(src, M, dsize[, dst[, flags[, borderMode[, borderValue]]]]) → dst


three parameters are OK. I have the same issue with
cv2.warpAffine
.

Answer

Problem solved. img.shape returns tuple with 3 elements, warpPerspective expects tuple with 2.

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