class Stack(ImageStack):
	def __init__(self, title, imp):
		ImageStack.__init__(self, imp.width, imp.height)
		self.title = title
		self.addSlice(imp.title, imp.getProcessor())
		
	def __add__(self, imp):
		if imp.width == self.width and imp.height == self.height:
			self.addSlice(imp.title, imp.getProcessor())
		else:
			print "image", imp.getTitle(), "has different dimensions. Ignoring."
		return self

	def show(self):
		ImagePlus(self.title, self).show()

w = WindowManager
stack = None
for id in w.getIDList():
	img = w.getImage(id)
	if None == stack: stack = Stack("all", img)
	else: stack += img


stack.show()