在 Tkinter 中使用 OpenCV [英] Using OpenCV with Tkinter

问题描述

我正在编写一个需要在 Tkinter 窗口中显示视频流的程序.由于还会有用于执行各种功能的按钮，因此我使用网格来组织所有内容.

I'm writing a program that needs to display a video stream in a Tkinter window. Since there will also be buttons for performing various functions, I'm using grid to organize where everything goes.

以下代码，修改自 显示网络摄像头序列 TkInter，在我的树莓派上运行良好:

The following code, modified from Show webcam sequence TkInter, works fine on my Raspberry Pi:

import Tkinter as tk
import cv2
from PIL import Image, ImageTk

width, height = 800, 600
cap = cv2.VideoCapture(0)

root = tk.Tk()
lmain = tk.Label(root)
lmain.pack()

def show_frame():
    _, frame = cap.read()
    frame = cv2.flip(frame, 1)
    cv2image = cv2.cvtColor(frame, cv2.COLOR_BGR2RGBA)
    img = Image.fromarray(cv2image)
    imgtk = ImageTk.PhotoImage(image=img)
    lmain.imgtk = imgtk
    lmain.configure(image=imgtk)
    lmain.after(10, show_frame)

show_frame()
root.mainloop()

但是，将其与 Tkinter 结合不起作用.(在接下来的内容中，我尝试注释掉 Display 1、Display 2 和两者都没有.)

However, combining it with Tkinter doesn't work. (In what follows, I've tried commenting out Display 1, Display 2, and neither.)

import numpy as np
import cv2
import Tkinter as tk
import Image, ImageTk

#Set up GUI
window = tk.Tk()  #Makes main window
window.wm_title("Digital Microscope")
window.config(background="#FFFFFF")

#Graphics window
imageFrame = tk.Frame(window, width=600, height=500)
imageFrame.grid(row=0, column=0, padx=10, pady=2)

#Capture video frames
lmain = tk.Label(imageFrame)
cap = cv2.VideoCapture(0)
def show_frame():
    _, frame = cap.read()
    frame = cv2.flip(frame, 1)
    cv2image = cv2.cvtColor(frame, cv2.COLOR_BGR2RGBA)
    img = Image.fromarray(cv2image)
    imgtk = ImageTk.PhotoImage(image=img)
    lmain.imgtk = imgtk
    lmain.configure(image=imgtk)
    lmain.after(10, show_frame) 

tk.Label(imageFrame, image=show_frame()).grid(row=0, column=0, padx=10, pady=2)  #Display 1


#Slider window (slider controls stage position)
sliderFrame = tk.Frame(window, width=600, height=100)
sliderFrame.grid(row = 600, column=0, padx=10, pady=2)


show_frame()  #Display 2
window.mainloop()  #Starts GUI

如何让视频在 imageFrame 中显示?

How can I get the video to display in imageFrame?

推荐答案

这应该有效:

import numpy as np
import cv2
import Tkinter as tk
import Image, ImageTk

#Set up GUI
window = tk.Tk()  #Makes main window
window.wm_title("Digital Microscope")
window.config(background="#FFFFFF")

#Graphics window
imageFrame = tk.Frame(window, width=600, height=500)
imageFrame.grid(row=0, column=0, padx=10, pady=2)

#Capture video frames
lmain = tk.Label(imageFrame)
lmain.grid(row=0, column=0)
cap = cv2.VideoCapture(0)
def show_frame():
    _, frame = cap.read()
    frame = cv2.flip(frame, 1)
    cv2image = cv2.cvtColor(frame, cv2.COLOR_BGR2RGBA)
    img = Image.fromarray(cv2image)
    imgtk = ImageTk.PhotoImage(image=img)
    lmain.imgtk = imgtk
    lmain.configure(image=imgtk)
    lmain.after(10, show_frame) 



#Slider window (slider controls stage position)
sliderFrame = tk.Frame(window, width=600, height=100)
sliderFrame.grid(row = 600, column=0, padx=10, pady=2)


show_frame()  #Display 2
window.mainloop()  #Starts GUI

首先，你有一行 tk.Label(imageFrame, image=show_frame()).grid(row=0, column=0, padx=10, pady=2)，由于 show_frame() 不返回任何内容，您已将 image 设置为 None.其次，您需要确保lmain.grid()，否则lmain 不会显示.

First of all, you have the line tk.Label(imageFrame, image=show_frame()).grid(row=0, column=0, padx=10, pady=2), and since show_frame() doesn't return anything, you've set image to None. Second of all, you need to make sure you lmain.grid(), otherwise lmain won't show.

如果你想有两个显示器一个在另一个上面，你可以这样做:

If you want to have two displays one on top of the other, you could do something like this:

import numpy as np
import cv2
import Tkinter as tk
import Image, ImageTk

#Set up GUI
window = tk.Tk()  #Makes main window
window.wm_title("Digital Microscope")
window.config(background="#FFFFFF")

#Graphics window
imageFrame = tk.Frame(window, width=600, height=500)
imageFrame.grid(row=0, column=0, padx=10, pady=2)

#Capture video frames

cap = cv2.VideoCapture(0)

def show_frame():
    _, frame = cap.read()
    frame = cv2.flip(frame, 1)
    cv2image = cv2.cvtColor(frame, cv2.COLOR_BGR2RGBA)
    img = Image.fromarray(cv2image)
    imgtk = ImageTk.PhotoImage(image=img)
    display1.imgtk = imgtk #Shows frame for display 1
    display1.configure(image=imgtk)
    display2.imgtk = imgtk #Shows frame for display 2
    display2.configure(image=imgtk)
    window.after(10, show_frame) 

display1 = tk.Label(imageFrame)
display1.grid(row=1, column=0, padx=10, pady=2)  #Display 1
display2 = tk.Label(imageFrame)
display2.grid(row=0, column=0) #Display 2

#Slider window (slider controls stage position)
sliderFrame = tk.Frame(window, width=600, height=100)
sliderFrame.grid(row = 600, column=0, padx=10, pady=2)

show_frame() #Display
window.mainloop()  #Starts GUI

这篇关于在 Tkinter 中使用 OpenCV的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！