[英]TypeError: Expected Ptr<cv::UMat> for argument 'mat' using mss library in python
I am trying to screenshot using mss library add display it using below code but getting same error every time.我正在尝试使用 mss 库添加屏幕截图并使用以下代码显示它,但每次都会出现相同的错误。 Is there a fix for this error是否有解决此错误的方法
TypeError: Expected Ptr<cv::UMat> for argument 'mat' TypeError:参数“mat”的预期 Ptr<cv::UMat>
** I am using this in Macos not windows ** 我在 Macos 中使用这个不是 windows
import cv2 as cv
import numpy as np
import os
from time import time
from mss import mss
os.chdir(os.path.dirname(os.path.abspath(__file__)))
loop_time = time()
with mss() as sct:
while (True):
monitor_1 = sct.monitors[1] # Identify the display to capture
screenshot = sct.grab(monitor_1)
cv.imshow('result', screenshot)
print('FPS {}',format(1 / (time() - loop_time)))
loop_time = time()
if cv.waitKey(1) == ord('q'):
cv.destroyAllWindows()
break
print('done')
You have to convert "screenshot" to cv::UMat:您必须将“屏幕截图”转换为 cv::UMat:
import time
import cv2
import mss
import numpy
with mss.mss() as sct:
# Part of the screen to capture
monitor = {"top": 40, "left": 0, "width": 800, "height": 640}
while "Screen capturing":
last_time = time.time()
# Get raw pixels from the screen, save it to a Numpy array
img = numpy.array(sct.grab(monitor))
# Display the picture
cv2.imshow("OpenCV/Numpy normal", img)
# Display the picture in grayscale
# cv2.imshow('OpenCV/Numpy grayscale',
# cv2.cvtColor(img, cv2.COLOR_BGRA2GRAY))
print("fps: {}".format(1 / (time.time() - last_time)))
# Press "q" to quit
if cv2.waitKey(25) & 0xFF == ord("q"):
cv2.destroyAllWindows()
break
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