如何保存临时图像，然后用 opencv 显示它

Question

我尝试将 png 图像保存为临时文件，然后用 opencv 显示它，下面的代码是我尝试过的。

from PIL import Image
import cv2
import io
import numpy as np

overlay = cv2.imread('temp/CAM/0.png')
img = Image.fromarray(overlay.astype('uint8'))
file_object = io.BytesIO()
img.save(file_object, 'PNG')
file_object.seek(0)
file_object = np.array(file_object)

cv2.imshow('test', file_object)
cv2.waitKey(0)
cv2.destroyAllWindows()

Traceback (most recent call last):

  File "<ipython-input-37-9c07b435fb51>", line 1, in <module>
    cv2.imshow('test', file_object)

TypeError: mat data type = 17 is not supported

Answer 1

代替：

cv2.imshow('test', file_object)

你应该使用：

cv2.imshow('test', img)