Abnormal interpretation

When using OpenCV to write code, there will be typeerror: integer argument expected, get float error

The error is a type error. For example, the following code will report an error

img = cv.imread('10.jpg', 1)
rows, cols, channels = img.shape
M = np.float32([[1, 0, 100], [0, 1, 50]])
res = cv.warpAffine(img, M, (cols*0.5, rows*0.5))
cv.imshow("img", res)
cv.waitKey()

The error location is shown in the figure below, where the value of int type is required, but after cols * 0.5 operation, the float type appears

Exception resolution

Type cast

res = cv.warpAffine(img, M, (int(cols*0.5), int(rows*0.5)))

Appendix

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Traceback (most recent call last):
  File "e:/crawl100/opencv_ppt/10day.py", line 7, in <module>
    res = cv.warpAffine(img, M, (cols*0.5, rows*0.5))
TypeError: integer argument expected, got float

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