Matrix with dimensions on tkinter Canvas

Question

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

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

Answer 1

Here is a working solution, slightly modified to make it work (some function is deprecated) and simplify it to save only the necessary part. We should 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()