class Camera(): def __init__(self, top): self.top = top self.h = int(data_demo.window_height // 1.5) self.w = int(data_demo.window_width // 1.74) self.canvas2 = Canvas(self.top, bg='LightSkyBlue', width=self.w, height=self.h, highlightthickness=2, highlightbackground='Black') self.canvas2.place(relx=0.0, rely=0.032) self.label = tk.Label(self.canvas2, text='摄像头显示区!', font=("黑体", 25), width=15, height=1) self.label.place(relx=0.32, rely=0.50, anchor='nw') def Firing_run(self, button_id): self.bool = True self.label.destroy() self.cap = cv2.VideoCapture(0) t = threading.Thread(target=self.windows_display) t.start() print("1") button_id.config(text='关闭摄像头', command=lambda: self.Cease_stop(button_id)) def Cease_stop(self, button_id): self.bool = False button_id.config(text='打开摄像头', command=lambda: self.Firing_run(button_id)) def windows_display(self): while self.bool: ref, frame = self.cap.read() if ref: image = cv2.cvtColor(frame, cv2.COLOR_BGR2RGB) image1 = Image.fromarray(image) image2 = image1.resize((self.w, self.h), Image.ANTIALIAS) self.photo = ImageTk.PhotoImage(image=image2) self.canvas2.create_image(0, 0, image=self.photo, anchor=tk.NW) self.canvas2.update() self.canvas2.after(10)它这段代码在画布上显示了摄像头画面但是会一闪一闪的怎么修改
时间: 2024-02-14 18:19:26 浏览: 86
Python RuntimeError: thread.__init__() not called解决方法
这个闪烁的问题可能是由于在`windows_display()`函数中更新画面时,画布的刷新频率和摄像头采集图像的帧率不一致导致的。你可以尝试将`self.canvas2.after(10)`的参数调大一些,比如改成`self.canvas2.after(30)`或者更大的值,这样可以让画布的刷新频率和摄像头采集图像的帧率更接近,减少闪烁的情况。
如果仍然存在闪烁的问题,可以尝试使用双缓冲机制,即在画布上绘制图像之前,先将图像绘制到一个临时的缓冲区,等到图像完全绘制完成后再将缓冲区中的图像显示在画布上。这可以通过在创建画布时添加`doublebuffer=1`参数来实现,即将`self.canvas2 = Canvas(self.top, bg='LightSkyBlue', width=self.w, height=self.h, highlightthickness=2, highlightbackground='Black')`改为`self.canvas2 = Canvas(self.top, bg='LightSkyBlue', width=self.w, height=self.h, highlightthickness=2, highlightbackground='Black', doublebuffer=1)`。这样做可以减少闪烁的情况。
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