Creating Blank Images in Python (allowing pixel by pixel manipulation)

Question

I have this code here that creates a Tkinter Canvas widget, then embeds an image within it.

import Tkinter
from PIL import ImageTk, Image


class image_manip(Tkinter.Tk):

    def __init__(self):
        Tkinter.Tk.__init__(self)

        self.configure(bg='red')

        self.ImbImage = Tkinter.Canvas(self, highlightthickness=0, bd=0, bg='blue')
        self.ImbImage.pack()

        self.i = ImageTk.PhotoImage(Image.open(r'test.png'))
        self.ImbImage.create_image(150, 100, image=self.i)


def run():
    image_manip().mainloop()
if __name__ == "__main__":
    run()

I'd like to be able to create a blank image within the Canvas widget, so that I could do pixel by pixel manipulation within the widget. How would one go about this?