Pyside2+opencv按钮控制摄像头开关

悸尢

于 2023-07-28 14:57:16 发布

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文章标签： opencv 人工智能计算机视觉

本文链接：https://blog.youkuaiyun.com/m0_63715549/article/details/131980331

版权

该代码示例展示了一个基于Pyside2GUI框架和OpenCV库的应用，用于在界面上通过按钮开关摄像头。程序创建了一个主窗口，包含一个标签显示摄像头画面和一个按钮来切换摄像头的开启和关闭。当点击按钮时，会读取摄像头视频流并实时更新显示，同时释放或初始化摄像头资源。

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Pyside2+opencv按钮控制摄像头开关

import cv2
from PySide2.QtWidgets import *
from PySide2.QtGui import QImage, QPixmap
from PySide2.QtCore import Qt, QTimer

class CameraApp(QMainWindow):
    def __init__(self):
        super().__init__()

        self.initUI()

        self.camera = cv2.VideoCapture(0)  # Use the default camera (index 0)
        self.is_camera_running = True
        self.timer = QTimer(self)
        self.timer.timeout.connect(self.update_frame)
        self.timer.start(30)  # Update frame every 30 milliseconds (adjust as needed)

    def initUI(self):
        central_widget = QWidget()
        layout = QVBoxLayout(central_widget)

        self.label = QLabel("摄像头画面显示区域")
        self.label.setAlignment(Qt.AlignCenter)
        layout.addWidget(self.label)

        self.toggle_button = QPushButton("开关摄像头")
        self.toggle_button.clicked.connect(self.toggle_camera)
        layout.addWidget(self.toggle_button)

        self.setCentralWidget(central_widget)

        self.setWindowTitle("Camera App")
        self.setGeometry(100, 100, 640, 480)

    def update_frame(self):
        if self.is_camera_running:
            ret, frame = self.camera.read()
            if ret:
                frame = cv2.cvtColor(frame, cv2.COLOR_BGR2RGB)
                h, w, ch = frame.shape
                bytes_per_line = ch * w
                q_image = QImage(frame.data, w, h, bytes_per_line, QImage.Format_RGB888)
                pixmap = QPixmap.fromImage(q_image)
                self.label.setPixmap(pixmap.scaled(self.label.size(), Qt.KeepAspectRatio, Qt.SmoothTransformation))

    def toggle_camera(self):
        if self.is_camera_running:
            self.camera.release()
        else:
            self.camera = cv2.VideoCapture(0)
        self.is_camera_running = not self.is_camera_running

if __name__ == '__main__':
    app = QApplication([])

    window = CameraApp()
    window.show()

    app.exec_()