偵測攝影機畫面是否變動

2024/10/09

Python程式碼

import cv2

import numpy as np

import winsound  # 用於播放提示音

import pyautogui  # 用於截取螢幕畫面

import time

import keyboard  # 用於偵測鍵盤輸入

def main():

    brightness = 1.0  # 初始亮度

    previous_frame = None  # 用於儲存前一幀影像

    # 等待5秒再開始偵測螢幕訊息

    print("等待 5 秒後開始偵測螢幕訊息...")

    time.sleep(5)

    running = True

    try:

        while running:

            # 如果按下 ESC 鍵，則退出迴圈

            if keyboard.is_pressed('esc'):

                print("偵測到 ESC 鍵，程式結束中...")

                running = False

                break

            # 截取螢幕畫面

            screenshot = pyautogui.screenshot()

            # 將螢幕畫面轉換為 numpy 數組

            frame = np.array(screenshot)

            # 調整亮度

            frame = cv2.convertScaleAbs(frame, alpha=brightness, beta=0)

            # 如果有前一幀，與當前幀進行比較

            if previous_frame is not None:

                diff = cv2.absdiff(cv2.cvtColor(previous_frame, cv2.COLOR_BGR2GRAY),

                                   cv2.cvtColor(frame, cv2.COLOR_BGR2GRAY))

                diff_score = np.sum(diff)  # 計算變化的總和

                if diff_score > 5000000:  # 設置變化閾值

                    # 播放簡單的 Beep 聲音，頻率為 1000 Hz，持續時間為 500 毫秒

                    winsound.Beep(1000, 500)

            # 更新前一幀

            previous_frame = frame.copy()

            # 添加短暫延遲，避免過於頻繁地截取螢幕畫面

            time.sleep(0.1)

    finally:

        print("釋放資源，程式已結束")

if __name__ == "__main__":

    main()