pytorch报错“some of the strides of a given numpy array are negative“

在运行pytorch程序时，出现了如下的错误：

经过查找资料，发现是Opencv读取图片时的原因，原始报错代码片段：

img = cv2.imread(imgpath)
img = img[:,:,::-1]
img_tensor = torch.from_numpy(img)

修改后的代码：

img = cv2.imread(imgpath)
img = img[:,:,::-1].copy()
img_tensor = torch.from_numpy(img)