numpy矩阵到tkinter画布 [英] Numpy Matrix to tkinter Canvas

问题描述

如何将Numpy矩阵作为位图显示到Tkinter画布中? 更准确地说，如何用矩阵中的内容填充PhotoImage?

How to display a Numpy matrix, as a bitmap, into a Tkinter canvas? More precisely, how to fill a PhotoImage with content from a matrix?

photo = ImageTk.PhotoImage(...)
self.canvas.create_image(0,0,image=photo,anchor=Tkinter.NW)

推荐答案

Here is working solution, slightly modified to make it work (some function was deprecated) and to simplify it to keep only the necessary part. We have to use Image.frombytes(...) to read the data in the numpy matrix.

import Tkinter
from PIL import Image, ImageTk
import numpy

class mainWindow():
    def __init__(self):
        self.root = Tkinter.Tk()
        self.frame = Tkinter.Frame(self.root, width=500, height=400)
        self.frame.pack()
        self.canvas = Tkinter.Canvas(self.frame, width=500,height=400)
        self.canvas.place(x=-2,y=-2)
        data=numpy.array(numpy.random.random((400,500))*100,dtype=int)
        self.im=Image.frombytes('L', (data.shape[1],data.shape[0]), data.astype('b').tostring())
        self.photo = ImageTk.PhotoImage(image=self.im)
        self.canvas.create_image(0,0,image=self.photo,anchor=Tkinter.NW)
        self.root.update()
        self.root.mainloop()

mainWindow()

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