TypeError: integer argument expected, got float python 2.7

Question

I am using the following code to detecion pattern. Why does it throw a TypeError?

# loop over the contours

for c in cnts:

# compute the center of the contour
M = cv2.moments(c)

    cX = (M["m10"] / (M["m00"] + 1e-7))
cY = (M["m01"] / (M["m00"] + 1e-7))

# draw the contour and center of the shape on the image
cv2.drawContours(frame1, [c], -1, (0, 255, 0), 2)
cv2.circle(frame1, (cX, cY), 7, (255, 255, 255), -1)
cv2.putText(frame1, "center", (cX - 20, cY - 20),
    cv2.FONT_HERSHEY_SIMPLEX, 0.5, (255, 255, 255), 2)

This massage error

    cv2.circle(frame1, (cX, cY), 7, (255, 255, 255), -1)

TypeError: integer argument expected, got float

I imitate the program people, on his program can. but I do not. I think the above program is appropriate — aku putri
– aku putri, Commented Jun 5, 2017 at 7:53

BoarGules · Accepted Answer · 2017-06-06 07:59:29Z

3

(cX, cY) is an OpenCV point. It represents x-y coordinates, in other words a pixel position. If the function you are calling says it expects an integer there, then it expects an integer. Whatever you think it should expect.

cv2.moments() returns a dictionary of 10 floats. If you want to use the values that it returns as coordinate points then you will need to convert them to integers somehow.

edited Jun 6, 2017 at 7:59

answered Jun 5, 2017 at 9:18

BoarGules

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YesThatIsMyName · Accepted Answer · 2018-10-24 07:55:48Z

0

This is because your division gives you a float value:

cX = (M["m10"] // (M["m00"] + 1e-7))
cY = (M["m01"] // (M["m00"] + 1e-7))

This will solve your problem.

edited Oct 24, 2018 at 7:55

YesThatIsMyName

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answered Oct 24, 2018 at 6:45

ankit desai

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