Python opencv2（cv2）包装器获取图像大小？ [英] Python opencv2 (cv2) wrapper get image size?

问题描述

如何在Python OpenCV（numpy）中的 cv2 包装器中获取图像大小。有没有比 numpy.shape（）更正确的方法。如何获得格式尺寸:(宽度，高度）列表？

How to get size of image in cv2 wrapper in Python OpenCV (numpy). Is there a correct way to do that than numpy.shape(). How to get it in format dimensions: (width, height) list?

谢谢

推荐答案

cv2 使用 numpy 来操作图像，所以正确和最好的方法来获取大小图像使用 numpy.shape 。假设您正在使用BGR图像，这是一个示例：

cv2 uses numpy for manipulating images, so the proper and best way to get the size of an image is using numpy.shape. Assuming you are working with BGR images, here is an example:

>>> import numpy as np
>>> import cv2
>>> img = cv2.imread('foo.jpg')
>>> height, width, channels = img.shape
>>> print height, width, channels
  600 800 3

如果你正在处理二进制图像， img 将有两个维度，因此您必须将代码更改为： height，width = img.shape

In case you were working with binary images, img will have two dimensions, and therefore you must change the code to: height, width = img.shape

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