Python截取屏幕截图并将其保存到缓冲区 [英] Python take a screenshot of the screen and save it to a buffer
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问题描述
我想截取屏幕截图并将其保存为照片( X.jpg
)作为缓冲区,以后我可以使用 cv2(opencv)
从缓冲区读取相同的图像.
我的行为如下:
I want to take a screenshot of the screen and save it to a buffer as a photo(X.jpg
) and later I can use the cv2(opencv)
to read the same image from the buffer.
i act as follow:
from PIL import ImageGrab
from io import BytesIO
ii = ImageGrab.grab()
with BytesIO() as output:
ii.save(output,format="JPEG")# This line has an error
cam = output.getvalue()
result, frame = cv2.imencode('.jpg', cam, encode_param)
我收到此错误消息:
TypeError: img is not a numpy array, neither a scalar
谢谢
推荐答案
这是一个演示:
from PIL import ImageGrab
from io import BytesIO
import numpy as np
import cv2
## (1) Grab the rgb frame as PIL.Image
ii = ImageGrab.grab()
print(type(ii)) # <class 'PIL.Image.Image'>
## (2) Convert PIL.Image to np.array
rgb = np.array(ii)
print(type(ii)) # <class 'numpy.ndarray'>
## (3) Convert into BGR and display
bgr = cv2.cvtColor(rgb, cv2.COLOR_RGB2BGR)
cv2.imshow("frame", bgr)
cv2.waitKey()
cv2.destroyAllWindows()
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