opencv(cv2)处理图片时报错cv2.error: OpenCV(3.4.2) C:\Miniconda3\conda-bld\opencv-suite_1534379934306\work\m

参考：
https://stackoverflow.com/questions/7385465/resize-an-image-and-changing-its-depth
原因：
回答评论1
resize输入输出数值类型或插值类型缺失
because OpenCV resize is missing support for certain combinations of input and output depths (numeric types), and interpolation types
解决方案：
回答评论

转化类型
the image dtype was int64 (in Python). It worked as soon as I used uint8

我的情况是由于原本图片类型为int32 img.astype(‘uint8’)解决
 

img = cv2.imread("images/coffe.jpg")  # 读取图像
dst1 = cv2.resize(img, (500, 500))  # 按照宽500像素、高500像素的大小进行缩放
image=dst1.astype('uint8')
print(image,image.shape)

问题解决