显示网络摄像头序列TkInter

Question

我用python编写了一个程序,导入了OpenCV的库.现在,我正在使用Tkinter进行GUI.我试图在GUI中显示网络摄像头,但我不能.我把代码放在函数中因为我想用按钮看我的网络摄像头.

我的代码是:

def webcam():
   img= cv.QueryFrame(cap)
   cam= PhotoImage(img)
   label1 = Label(root, image=cam)
   label1.image = cam
   label1.pack()
   label1.place(x=0, y=400)

另外,我不知道如何在没有一个循环的情况下不断更新,因为我有另一个按钮来退出程序.

Answer 1

使用OpenCv和Tkinter的简单相机捕获版本:

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

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

root = tk.Tk()
root.bind('<Escape>', lambda e: root.quit())
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()

您需要下载并安装PIL!

Answer 2

Kieleth 的 py3.7 更新代码

import PIL
from PIL import Image,ImageTk
import pytesseract
import cv2
from tkinter import *
width, height = 800, 600
cap = cv2.VideoCapture(0)
cap.set(cv2.CAP_PROP_FRAME_WIDTH, width)
cap.set(cv2.CAP_PROP_FRAME_HEIGHT, height)

root = Tk()
root.bind('<Escape>', lambda e: root.quit())
lmain = Label(root)
lmain.pack()

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

show_frame()
root.mainloop()