如何将英寸换成米？

Question

以下是代码，如何将英寸更改为米？

box = cv2.boxPoints(marker)
cv2.drawContours(image, [box.astype(int)], -1, (0, 255, 0), 2)
cv2.putText(image, "%.2fft" % (inches / 12),
    (image.shape[1] - 200, image.shape[0] - 20), cv2.FONT_HERSHEY_SIMPLEX,
    2.0, (0, 255, 0), 3)
cv2.imshow("image", image)
cv2.waitKey(0)

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