self.ui.push1.clicked.connect(self.bnt_start) self.ui.push2.clicked.connect(self.bnt_stop) # '''若点击开始按钮，调用摄像头，定时器开启''' def bnt_start(self): self.cap = cv2.VideoCapture(0) self.timer_camera.start(100) self.timer_camera.timeout.connect(self.show_camera) # '''若点击停止按钮，定时器失效''' def bnt_stop(self): self.timer_camera.stop() # '''首先通过摄像头获取的图像resize，由于cv2默认使用的是BGR编码，图像显示偏蓝色， # 需要通过cvtColor和qimage2ndarray.array2qimage转换一下''' def show_camera(self): ret, img = self.cap.read() self.img = cv2.resize(img, (640, 480), interpolation=cv2.INTER_CUBIC) self.img1 = cv2.cvtColor(self.img, cv2.COLOR_BGR2RGB) qimg = qimage2ndarray.array2qimage(self.img) self.label.setPixmap(QPixmap(qimg)) self.label.show()显示不了图像

根据你提供的代码，可能是以下几个原因导致图像无法显示：

1. 没有正确设置Label的大小：需要在UI设计中将Label的大小设置为与摄像头采集的图像大小相同，或者设置为自适应大小。

2. 没有正确转换图像格式：需要将BGR格式的图像转换为RGB格式，或者使用QImage的fromData方法将BGR格式的图像转换为QImage格式。

3. 没有正确设置Label的显示方式：需要将Label的显示方式设置为ScaledContents，使得图像能够自适应Label的大小显示。

你可以逐一检查这些问题，看看哪一个是导致图像无法显示的原因。

相关问题

下面这段代码的作用是什么： def __init__(self, title): super().__init__() self.ui = Ui_Dialog() self.ui.setupUi(self) self.save_path = 'result' self.save_id = 0 if not os.path.exists(self.save_path): os.mkdir(self.save_path) self.now = None self.model = None self.video_count = None self._timer = None self.ui.textBrowser.setFontPointSize(18) self.ui.label.setText(title) self.ui.pushButton_Model.clicked.connect(self.select_model) self.ui.pushButton_Img.clicked.connect(self.select_image_file) self.ui.pushButton_ImgFolder.clicked.connect(self.select_folder_file) self.ui.pushButton_Video.clicked.connect(self.select_video_file) self.ui.pushButton_Camera.clicked.connect(self.select_camear) self.ui.pushButton_SavePath.clicked.connect(self.select_savepath) self.ui.pushButton_BegDet.clicked.connect(self.begin_detect) self.ui.pushButton_StopDet.clicked.connect(self.stop_detect) self.ui.pushButton_Exit.clicked.connect(self._exit) self.show()

这段代码的作用是初始化一个名为 "title" 的类，并且连接了多个按钮的点击事件，用于选择模型、选择文件、选择摄像头、选择保存路径等操作。同时创建了一个名为 "result" 的文件夹，用于存储检测结果。

使用QTimer对象代替QBasicTimer对象，修改程序class MyWindow(QWidget): def init(self): super().init() self.thread_list = [] self.color_photo_dir = os.path.join(os.getcwd(), "color_photos") self.depth_photo_dir = os.path.join(os.getcwd(), "depth_photos") self.image_thread = None self.saved_color_photos = 0 # 定义 saved_color_photos 属性 self.saved_depth_photos = 0 # 定义 saved_depth_photos 属性 self.init_ui() def init_ui(self): self.ui = uic.loadUi("C:/Users/wyt/Desktop/D405界面/intelrealsense1.ui") self.open_btn = self.ui.pushButton self.color_image_chose_btn = self.ui.pushButton_3 self.depth_image_chose_btn = self.ui.pushButton_4 self.open_btn.clicked.connect(self.open) self.color_image_chose_btn.clicked.connect(lambda: self.chose_dir(self.ui.lineEdit, "color")) self.depth_image_chose_btn.clicked.connect(lambda: self.chose_dir(self.ui.lineEdit_2, "depth")) def open(self): self.profile = self.pipeline.start(self.config) self.is_camera_opened = True self.label.setText('相机已打开') self.label.setStyleSheet('color:green') self.open_btn.setEnabled(False) self.close_btn.setEnabled(True) self.image_thread = ImageThread(self.pipeline, self.color_label, self.depth_label, self.interval, self.color_photo_dir, self.depth_photo_dir, self._dgl) self.image_thread.saved_color_photos_signal.connect(self.update_saved_color_photos_label) self.image_thread.saved_depth_photos_signal.connect(self.update_saved_depth_photos_label) self.image_thread.start() def chose_dir(self, line_edit, button_type): my_thread = MyThread(line_edit, button_type) my_thread.finished_signal.connect(self.update_line_edit) self.thread_list.append(my_thread) my_thread.start()

以下是使用QTimer对象代替QBasicTimer对象的修改后的代码：

from PyQt5.QtCore import QTimer

class MyWindow(QWidget):
    def __init__(self):
        super().__init__()
        self.thread_list = []
        self.color_photo_dir = os.path.join(os.getcwd(), "color_photos")
        self.depth_photo_dir = os.path.join(os.getcwd(), "depth_photos")
        self.image_thread = None
        self.saved_color_photos = 0
        self.saved_depth_photos = 0
        self.init_ui()

    def init_ui(self):
        self.ui = uic.loadUi("C:/Users/wyt/Desktop/D405界面/intelrealsense1.ui")
        self.open_btn = self.ui.pushButton
        self.color_image_chose_btn = self.ui.pushButton_3
        self.depth_image_chose_btn = self.ui.pushButton_4
        self.open_btn.clicked.connect(self.open)
        self.color_image_chose_btn.clicked.connect(lambda: self.chose_dir(self.ui.lineEdit, "color"))
        self.depth_image_chose_btn.clicked.connect(lambda: self.chose_dir(self.ui.lineEdit_2, "depth"))

    def open(self):
        self.profile = self.pipeline.start(self.config)
        self.is_camera_opened = True
        self.label.setText('相机已打开')
        self.label.setStyleSheet('color:green')
        self.open_btn.setEnabled(False)
        self.close_btn.setEnabled(True)
        self.image_thread = ImageThread(self.pipeline, self.color_label, self.depth_label, self.interval, self.color_photo_dir, self.depth_photo_dir, self._dgl)
        self.image_thread.saved_color_photos_signal.connect(self.update_saved_color_photos_label)
        self.image_thread.saved_depth_photos_signal.connect(self.update_saved_depth_photos_label)
        self.image_thread.start()
        self.timer = QTimer(self)  # 创建QTimer对象
        self.timer.timeout.connect(self.update)  # 连接timeout信号与槽函数
        self.timer.start(100)  # 启动定时器，间隔为100ms

    def update(self):
        # 检查所有的线程是否已完成，并从线程列表中移除已完成的线程
        for thread in self.thread_list:
            if not thread.isRunning():
                self.thread_list.remove(thread)

    def chose_dir(self, line_edit, button_type):
        my_thread = MyThread(line_edit, button_type)
        my_thread.finished_signal.connect(self.update_line_edit)
        self.thread_list.append(my_thread)
        my_thread.start()

    def update_saved_color_photos_label(self, count):
        self.saved_color_photos = count
        self.ui.label_5.setText(str(self.saved_color_photos))

    def update_saved_depth_photos_label(self, count):
        self.saved_depth_photos = count
        self.ui.label_6.setText(str(self.saved_depth_photos))