mirror of
https://github.com/python-pillow/Pillow.git
synced 2025-10-31 07:57:27 +03:00
73 lines
1.7 KiB
Python
73 lines
1.7 KiB
Python
#
|
|
# The Python Imaging Library
|
|
# $Id$
|
|
#
|
|
# this demo script illustrates how a 1-bit BitmapImage can be used
|
|
# as a dynamically updated overlay
|
|
#
|
|
|
|
try:
|
|
from tkinter import *
|
|
except ImportError:
|
|
from Tkinter import *
|
|
|
|
from PIL import Image, ImageTk
|
|
import sys
|
|
|
|
#
|
|
# an image viewer
|
|
|
|
class UI(Frame):
|
|
def __init__(self, master, im, value = 128):
|
|
Frame.__init__(self, master)
|
|
|
|
self.image = im
|
|
self.value = value
|
|
|
|
self.canvas = Canvas(self, width=im.size[0], height=im.size[1])
|
|
self.backdrop = ImageTk.PhotoImage(im)
|
|
self.canvas.create_image(0, 0, image=self.backdrop, anchor=NW)
|
|
self.canvas.pack()
|
|
|
|
scale = Scale(self, orient=HORIZONTAL, from_=0, to=255,
|
|
resolution=1, command=self.update, length=256)
|
|
scale.set(value)
|
|
scale.bind("<ButtonRelease-1>", self.redraw)
|
|
scale.pack()
|
|
|
|
# uncomment the following line for instant feedback (might
|
|
# be too slow on some platforms)
|
|
# self.redraw()
|
|
|
|
def update(self, value):
|
|
self.value = eval(value)
|
|
|
|
self.redraw()
|
|
|
|
def redraw(self, event = None):
|
|
|
|
# create overlay (note the explicit conversion to mode "1")
|
|
im = self.image.point(lambda v,t=self.value: v>=t, "1")
|
|
self.overlay = ImageTk.BitmapImage(im, foreground="green")
|
|
|
|
# update canvas
|
|
self.canvas.delete("overlay")
|
|
self.canvas.create_image(0, 0, image=self.overlay, anchor=NW,
|
|
tags="overlay")
|
|
|
|
# --------------------------------------------------------------------
|
|
# main
|
|
|
|
root = Tk()
|
|
|
|
im = Image.open(sys.argv[1])
|
|
|
|
if im.mode != "L":
|
|
im = im.convert("L")
|
|
|
|
# im.thumbnail((320,200))
|
|
|
|
UI(root, im).pack()
|
|
|
|
root.mainloop()
|