python - OpenCv 窗口在单击时层叠屏幕

问题描述

我编写了这段代码，通过第二次截屏来捕获屏幕画面，但是当单击 OpenCv 窗口时，它会层叠屏幕。

当您将鼠标悬停在 Opencv 窗口上时，它会显示没有一百个重复的屏幕。究竟是什么错误？图片：

使用我制作的类的代码：

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)

截屏类：

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

这个错误阻止我进入图像检测项目的下一部分。

标签： pythonpython-3.xopencvpywin32

python - OpenCv 窗口在单击时层叠屏幕

问题描述

解决方案

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