import threading import cv2 import tkinter as tk from tkinter import * from PIL import Image, ImageTk#图像控件 from Background.Thread_Demo import Thread_data from Data_demo import data_demo 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() 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() cv2.waitKey(1) 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(15)中t = threading.Thread(target=self.windows_display)调用摄像头会闪烁，但是t = threading.Thread(target=self.windows_display())却不会

原因是当您使用`t = threading.Thread(target=self.windows_display)`时，它会将`self.windows_display()`作为一个参数，而不是一个可调用的函数。因此，线程将立即运行`self.windows_display()`函数，并将其返回值（None）传递给`t`。这意味着您的线程实际上不会运行`self.windows_display()`函数，而是只运行了一次，并立即停止。

相反，当您使用`t = threading.Thread(target=self.windows_display)`时，它会将`self.windows_display`作为一个可调用的函数传递给`t`，因此线程将运行`self.windows_display`函数，并在后台持续运行。

因此，您应该修改线程创建代码如下：

t = threading.Thread(target=self.windows_display)

而不是：

t = threading.Thread(target=self.windows_display())