pip install Pillow
pip install win32gui

from win32gui import *  # 操作windows窗口
from PIL import ImageGrab  # 操作圖像
import win32con  # 系統(tǒng)操作

names = set()

def get_window_title(window, nouse):
    '''
    獲取窗口標(biāo)題函數(shù)
    :param window: 窗口對(duì)象
    :param nouse:
    :return:
    '''

    if IsWindow(window) and IsWindowEnabled(window) and IsWindowVisible(window):

        names.add(GetWindowText(window))

EnumWindows(get_window_title, 0)

list_ = [name for name in names if name]

for n in list_:

    print('活動(dòng)窗口: ', n)

name = input('請(qǐng)輸入需要截圖的活動(dòng)窗口名稱: \n')

window = FindWindow(0, name)  # 根據(jù)窗口名稱獲取窗口對(duì)象

ShowWindow(window, win32con.SW_MAXIMIZE)  # 將該窗口最大化

x_start, y_start, x_end, y_end = GetWindowRect(window)

# 坐標(biāo)信息
box = (x_start, y_start, x_end, y_end)

image = ImageGrab.grab(box)

image.show()  # 圖片展示，如果截完圖需要展示則放開此項(xiàng)

image.save('target.png')

print('截圖已經(jīng)保存完成！')

import pyautogui
import cv2
import numpy as np

img = pyautogui.screenshot(region=[300,50, 200, 100])  # 分別代表：左上角坐標(biāo)，寬高
#對(duì)獲取的圖片轉(zhuǎn)換成二維矩陣形式，后再將RGB轉(zhuǎn)成BGR
#因?yàn)閕mshow,默認(rèn)通道順序是BGR，而pyautogui默認(rèn)是RGB所以要轉(zhuǎn)換一下，不然會(huì)有點(diǎn)問(wèn)題
img = cv2.cvtColor(np.asarray(img), cv2.COLOR_RGB2BGR)

cv2.imshow("截屏",img)
cv2.waitKey(0)

import win32gui

hwnd_title = dict() #創(chuàng)建字典保存窗口的句柄與名稱映射關(guān)系


def get_all_hwnd(hwnd, mouse):
    if win32gui.IsWindow(hwnd) and win32gui.IsWindowEnabled(hwnd) and win32gui.IsWindowVisible(hwnd):
        hwnd_title.update({hwnd: win32gui.GetWindowText(hwnd)})

win32gui.EnumWindows(get_all_hwnd, 0)

for h, t in hwnd_title.items():
    if t!= "":
        print(h, t)

from PyQt5.QtWidgets import QApplication
import win32gui
import sys
#這個(gè)是截取全屏的
hwnd = win32gui.FindWindow(None, 'C:/Windows/system32/cmd.exe')
app = QApplication(sys.argv)
screen = QApplication.primaryScreen()
img = screen.grabWindow(hwnd).toImage()
img.save("screenshot.jpg")

def convertQImageToMat(incomingImage):
    '''  Converts a QImage into an opencv MAT format  '''
    # Format_RGB32 = 4,存入格式為B,G,R,A 對(duì)應(yīng) 0,1,2,3
    # RGB32圖像每個(gè)像素用32比特位表示，占4個(gè)字節(jié)，
    # R，G，B分量分別用8個(gè)bit表示，存儲(chǔ)順序?yàn)锽，G，R，最后8個(gè)字節(jié)保留
    incomingImage = incomingImage.convertToFormat(4)
    width = incomingImage.width()
    height = incomingImage.height()

    ptr = incomingImage.bits()
    ptr.setsize(incomingImage.byteCount())
    arr = np.array(ptr).reshape(height, width, 4)  # Copies the data
    # arr為BGRA，4通道圖片
    return arr

from PyQt5.QtWidgets import QApplication
import win32gui
import sys
import cv2
import numpy as np
hwnd = win32gui.FindWindow(None, '劍士之魂中文版小游戲,在線玩,4399小游戲 - 360安全瀏覽器 13.1')
app = QApplication(sys.argv)
screen = QApplication.primaryScreen()
img = screen.grabWindow(hwnd).toImage()

img=convertQImageToMat(img)#將獲取的圖像從QImage轉(zhuǎn)換為RBG格式
cv2.imshow("asd",img)      #imshow
cv2.waitKey(0)