idraw on top of an image

Demo/tkinter/guido/imagedraw.py

+"""Draw on top of an image"""
+
+from Tkinter import *
+import sys
+
+def main():
+    filename = sys.argv[1]
+    root = Tk()
+    img = PhotoImage(file=filename)
+    w, h = img.width(), img.height()
+    canv = Canvas(root, width=w, height=h)
+    canv.create_image(0, 0, anchor=NW, image=img)
+    canv.pack()
+    canv.bind('<Button-1>', blob)
+    root.mainloop()
+
+def blob(event):
+    x, y = event.x, event.y
+    canv = event.widget
+    r = 5
+    canv.create_oval(x-r, y-r, x+r, y+r, fill='red', outline="")
+
+main()