Python OpenCv窗口在显示'；点击

我写这段代码是为了通过每秒钟截图来捕捉屏幕画面，但是当点击OpenCv窗口时，它会级联屏幕

当您将鼠标悬停在Opencv窗口上时，它会显示没有100个副本的屏幕。究竟是什么错误？图片：

使用I类的代码：

from window_capture import Window_Capture
from time import time
import cv2 as cv
import numpy

loop_time = time()

wincap = Window_Capture()

while True:
    screenshot = wincap.screenshare()

    cv.imshow('Screen', screenshot)

    print("FPS {}".format(round(1 / (time() - loop_time))))
    loop_time = time()

    if cv.waitKey(1) == ord('q'):
        print("Capture Ended")
        cv.destroyWindow(screenshot)

用于屏幕捕获的类：

import pyautogui
import numpy
import cv2 as cv
from time import time
from PIL import ImageGrab
import win32gui, win32ui, win32con
from win32api import GetSystemMetrics
import time


class Window_Capture:
    w = 0
    h = 0
    hwnd = None

    def __init__(self, window_name=None):
        # checking is windowname exists

        if window_name is None:
            print("No window set to capture: Setting to active Window")
            time.sleep(3)
            self.hwnd = win32gui.GetDesktopWindow()
            print(win32gui.GetWindowText(win32gui.GetDesktopWindow()))
        else:
            # self.hwnd = win32gui.FindWindow(None, window_name)
            self.hwnd = win32gui.FindWindow(None, window_name)
            print("Window Found: Setting to preferred Window")

        # define monitor height and width and hwnd
        self.w = GetSystemMetrics(0)
        self.h = GetSystemMetrics(1)

    def screenshare(self):

        wDC = win32gui.GetWindowDC(self.hwnd)
        dcObj = win32ui.CreateDCFromHandle(wDC)
        cDC = dcObj.CreateCompatibleDC()
        dataBitMap = win32ui.CreateBitmap()
        dataBitMap.CreateCompatibleBitmap(dcObj, self.w, self.h)
        cDC.SelectObject(dataBitMap)
        cDC.BitBlt((0, 0), (self.w, self.h), dcObj, (0, 0), win32con.SRCCOPY)

        signedIntsArray = dataBitMap.GetBitmapBits(True)
        img = numpy.frombuffer(signedIntsArray, dtype='uint8')
        img.shape = (self.h, self.w, 4)

        dcObj.DeleteDC()
        cDC.DeleteDC()
        win32gui.ReleaseDC(self.hwnd, wDC)
        win32gui.DeleteObject(dataBitMap.GetHandle())

        img = img[..., :3]
        img = numpy.ascontiguousarray(img)

        return img

此错误阻止我进入图像检测项目的下一部分。

更好的解决方案是：

import time

import cv2
import numpy as np
from mss import mss

#import pyautogui
#width, height= pyautogui.size()
width=900
height=900

mon = {'top': 0, 'left': 0, 'width': width, 'height': height}
with mss() as sct:
    # mon = sct.monitors[0]
    while True:
        last_time = time.time()
        img = sct.grab(mon)
        print('fps: {0}'.format(1 / (time.time()-last_time)))
        cv2.imshow('test', np.array(img))
        if cv2.waitKey(25) & 0xFF == ord('q'):
            cv2.destroyAllWindows()
            break

注：

---

当你悬停时，你不会看到很多窗口，因为你看到的是完整的窗口，而opencv窗口没有打开，否则你会看到很多窗口，你会看到一个层叠，因为你会重复拍摄窗口本身的屏幕截图

就像站在两面镜子之间