Contributed modules by Riccardo Trocca. Extended pixmap wrapper, NumPy…

Contributed modules by Riccardo Trocca. Extended pixmap wrapper, NumPy visualiser and QuickTime to images.

Mac/Contrib/ImageHelpers/ExtPixMapWrapper.py

+'''
+A really quick and dirty hack to extend  PixMapWrapper
+They are mere copies of the toImage and fromImage methods.
+Riccardo Trocca (rtrocca@libero.it)
+'''
+from PixMapWrapper import *
+import Numeric
+
+class ExtPixMapWrapper(PixMapWrapper):
+	
+	def toNumeric(self):
+		
+		data = self.tostring()[1:] + chr(0)
+		bounds = self.bounds
+		tmp=Numeric.fromstring(data,Numeric.UnsignedInt8)
+		#tmp.shape=(bounds[3]-bounds[1],bounds[2]-bounds[0],4)
+		tmp.shape=(bounds[2]-bounds[0],bounds[3]-bounds[1],4)
+		return Numeric.transpose(tmp,(1,0,2))
+		
+	def fromNumeric(self,num):
+		s=num.shape
+		x=num.shape[1]
+		y=num.shape[0]
+		#bands=1 Greyscale image
+		#bands=3 RGB image
+		#bands=4 RGBA image
+		if len(s)==2:
+			bands=1
+			num=Numeric.resize(num,(y,x,1))
+		else:
+			bands=num.shape[2]
+		
+		if bands==1:
+			num=Numeric.concatenate((num,num,num),2)
+			bands=3
+		if bands==3:
+			alpha=Numeric.ones((y,x))*255
+			alpha.shape=(y,x,1)
+			num=Numeric.concatenate((num,alpha),2)
+			
+		data=chr(0)+Numeric.transpose(num,(1,0,2)).astype(Numeric.UnsignedInt8).tostring()
+		PixMapWrapper.fromstring(self,data,x,y)
+		
+			
+		
+			

Mac/Contrib/ImageHelpers/ImageMac.py

+'''
+ImageMac.py by Trocca Riccardo (rtrocca@libero.it)
+This module provides functions to display images and Numeric arrays
+It provides two classes ImageMacWin e NumericMacWin and two simple methods showImage and
+showNumeric.
+
+They work like this:
+showImage(Image,"optional window title",zoomFactor)
+the same for showNumeric
+zoomfactor (defaults to 1) allows to zoom in the image by a factor of 1x 2x 3x and so on
+I did't try with a 0.5x or similar.
+The windows don't provide a scrollbar or a resize box.
+Probably a better solution (and more similar to the original implementation in PIL and NumPy)
+would be to save a temp file is some suitable format and then make an application (through appleevents) to open it.
+Good guesses should be GraphicConverter or PictureViewer.
+
+However the classes ImageMacWin e NumericMacWin use an extended version of PixMapWrapper in order to 
+provide an image buffer and then blit it in the window.
+
+Being one of my first experiences with Python I didn't use Exceptions to signal error conditions, sorry.
+
+'''
+import W
+import Qd
+from ExtPixMapWrapper import *
+from Numeric import *
+import Image
+import macfs
+
+class ImageMacWin(W.Window):
+	
+	def __init__(self,size=(300,300),title="ImageMacWin"):
+		self.pm=ExtPixMapWrapper()
+		self.empty=1
+		self.size=size
+		W.Window.__init__(self,size,title)
+	
+	def Show(self,image,resize=0):
+		#print "format: ", image.format," size: ",image.size," mode: ",image.mode
+		#print "string len :",len(image.tostring())
+		self.pm.fromImage(image)
+		self.empty=0
+		if resize:
+			self.size=(image.size[0]*resize,image.size[1]*resize)
+			W.Window.do_resize(self,self.size[0],self.size[1],self.wid)
+		self.do_drawing()
+	
+	def do_drawing(self):
+		#print "do_drawing"
+		self.SetPort()
+		Qd.RGBForeColor( (0,0,0) )
+		Qd.RGBBackColor((65535, 65535, 65535))
+		Qd.EraseRect((0,0,self.size[0],self.size[1]))
+		if not self.empty:
+			#print "should blit"
+			self.pm.blit(0,0,self.size[0],self.size[1])
+		
+	def do_update(self,macoswindowid,event):
+		#print "update"
+		self.do_drawing()
+		
+class NumericMacWin(W.Window):
+	
+	def __init__(self,size=(300,300),title="ImageMacWin"):
+		self.pm=ExtPixMapWrapper()
+		self.empty=1
+		self.size=size
+		W.Window.__init__(self,size,title)
+	
+	def Show(self,num,resize=0):
+		#print "shape: ", num.shape
+		#print "string len :",len(num.tostring())
+		self.pm.fromNumeric(num)
+		self.empty=0
+		if resize:
+			self.size=(num.shape[1]*resize,num.shape[0]*resize)
+			W.Window.do_resize(self,self.size[0],self.size[1],self.wid)
+		self.do_drawing()
+	
+	def do_drawing(self):
+		#print "do_drawing"
+		self.SetPort()
+		Qd.RGBForeColor( (0,0,0) )
+		Qd.RGBBackColor((65535, 65535, 65535))
+		Qd.EraseRect((0,0,self.size[0],self.size[1]))
+		if not self.empty:
+			#print "should blit"
+			self.pm.blit(0,0,self.size[0],self.size[1])
+		
+	def do_update(self,macoswindowid,event):
+		#print "update"
+		self.do_drawing()
+
+'''
+Some utilities: convert an Image to a NumPy array and viceversa.
+The Image2Numeric function doesn't make any color space conversion.
+The Numeric2Image function returns an L or RGB or RGBA images depending on the shape of
+the array:
+	(x,y)	-> 	'L'
+	(x,y,1)	-> 	'L'
+	(x,y,3)	->	'RGB'
+	(x,y,4)	->	'RGBA'
+'''
+def Image2Numeric(im):
+	tmp=fromstring(im.tostring(),UnsignedInt8)
+	
+	if (im.mode=='RGB')|(im.mode=='YCbCr'):
+		bands=3
+	
+	if (im.mode=='RGBA')|(im.mode=='CMYK'):
+		bands=4
+	
+	if (im.mode=='L'):
+		bands=1
+
+	tmp.shape=(im.size[0],im.size[1],bands)
+	return transpose(tmp,(1,0,2))
+
+def Numeric2Image(num):
+	#sometimes a monoband image's shape can be (x,y,1), other times just (x,y). Here w deal with both
+	if len(num.shape)==3: 
+		bands=num.shape[2]
+		if bands==1:
+			mode='L'
+		elif bands==3:
+			mode='RGB'
+		else:
+			mode='RGBA'
+		return Image.fromstring(mode,(num.shape[1],num.shape[0]),transpose(num,(1,0,2)).astype(UnsignedInt8).tostring())
+	else:
+		return Image.fromstring('L',(num.shape[1],num.shape[0]),transpose(num).astype(UnsignedInt8).tostring())	
+
+def showImage(im,title="ImageWin",zoomFactor=1):
+	imw=ImageMacWin((300,200),title)
+	imw.open()
+	try:
+		imw.Show(im,zoomFactor )
+	except MemoryError,e:
+		imw.close()
+		print "ImageMac.showImage: Insufficient Memory"
+		
+
+def showNumeric(num,title="NumericWin",zoomFactor=1):
+	#im=Numeric2Image(num)
+	numw=NumericMacWin((300,200),title)
+	numw.open()
+	try:
+		numw.Show(num,zoomFactor )
+	except MemoryError:
+		numw.close()
+		print "ImageMac.showNumeric Insufficient Memory"
+	
+'''
+GimmeImage pops up a file dialog and asks for an image file.
+it returns a PIL image.
+Optional argument: a string to be displayed by the dialog. 
+'''
+	
+def GimmeImage(prompt="Image File:"):
+	import macfs
+	fsspec, ok = macfs.PromptGetFile(prompt)
+	if ok:
+		path = fsspec.as_pathname()
+		return Image.open(path)
+	return None
+	
+'''
+This is just some experimental stuff:
+	Filter3x3 a convolution filter (too slow use signal tools instead)
+	diffBWImage subtracts 2 images contained in NumPy arrays
+	averageN it computes the average of a list incrementally
+	BWImage converts an RGB or RGBA image (in a NumPy array) to BW
+	SplitBands splits the bands of an Image (inside a NumPy)
+	NumHisto and PlotHisto are some experiments to plot an intesity histogram
+'''
+
+def Filter3x3(mul,fi,num):
+	(a,b,c,d,e,f,g,h,i)=fi
+	print fi
+	num.shape=(num.shape[0],num.shape[1])
+	res=zeros(num.shape)
+	for x in range(1,num.shape[0]-1):
+		for y in range(1,num.shape[1]-1):
+			xb=x-1
+			xa=x+1
+			yb=y-1
+			ya=y+1
+			res[x,y]=int((a*num[xb,yb]+b*num[x,yb]+c*num[xa,yb]+d*num[xb,y]+e*num[x,y]+f*num[xa,y]+g*num[xb,ya]+h*num[x,ya]+i*num[xa,ya])/mul)
+	return res
+		
+def diffBWImage(num1,num2):
+	return 127+(num1-num2)/2
+
+def averageN(N,avrg,new):
+	return ((N-1)*avrg+new)/N
+		
+def BWImage(num):
+	if num.shape[2]==3:
+		bw=array(((0.3086,0.6094,0.0820)))
+	else:
+		bw=array(((0.3086,0.6094,0.0820,0)))
+	res=innerproduct(num,bw)
+	res.shape=(res.shape[0],res.shape[1])
+	return res
+
+def SplitBands(num):
+	x=num.shape[0]
+	y=num.shape[1]
+	if num.shape[2]==3:
+		return (reshape(num[:,:,0],(x,y)),reshape(num[:,:,1],(x,y)),reshape(num[:,:,2],(x,y)))
+	else:
+		return (reshape(num[:,:,0],(x,y)),reshape(num[:,:,1],(x,y)),reshape(num[:,:,2],(x,y)),reshape(num[:,:,3],(x,y)))
+
+def NumHisto(datas):
+	#print "type(datas) ",type(datas)
+	a=ravel(datas)
+	n=searchsorted(sort(a),arange(0,256))
+	n=concatenate([n,[len(a)]])
+	return n[1:]-n[:-1]
+	
+def PlotHisto(datas,ratio=1):
+	from graphite import *
+	from MLab import max
+	h=NumHisto(datas)
+	#print "histo: ",h
+	#print "histo.shape: ",h.shape
+	maxval=max(h)
+	#print "maxval ",maxval
+	h.shape=(256,1)
+	x=arange(0,256)
+	x.shape=(256,1)
+	datah=concatenate([x,h],1)
+	print "data: "
+	print datah
+	g=Graph()
+	g.datasets.append(Dataset(datah))
+	f0=PointPlot()
+	f0.lineStyle = LineStyle(width=2, color=red, kind=SOLID)
+	g.formats = [f0]
+	g.axes[X].range = [0,255]
+	g.axes[X].tickMarks[0].spacing = 10
+	#g.axes[X].tickMarks[0].labels = "%d"
+	g.axes[Y].range = [0,maxval/ratio]
+	g.bottom = 370
+	g.top =10
+	g.left=10
+	g.right=590
+	
+	genOutput(g,'QD',size=(600,400))
+	
+def test():
+	import MacOS
+	import Image
+	import ImageFilter
+	import Numeric
+	fsspec, ok = macfs.PromptGetFile("Image File:")
+	if ok: 
+		path = fsspec.as_pathname()
+		im=Image.open(path)
+		#im2=im.filter(ImageFilter.SMOOTH)
+		showImage(im,"normal")
+		num=Image2Numeric(im)
+		#num=Numeric.transpose(num,(1,0,2))
+		
+		showNumeric(num,"Numeric")
+		
+		print "num.shape ",num.shape
+		showImage(Numeric2Image(num),"difficile")
+		#showImage(im.filter(ImageFilter.SMOOTH),"smooth")
+		#showImage(im.filter(ImageFilter.FIND_EDGES).filter(ImageFilter.SHARPEN),"detail")
+	
+		print "here"
+	else:
+		print "did not open file"
+
+if __name__ == '__main__':
+	test()
\ No newline at end of file

Mac/Contrib/ImageHelpers/MovieUtils.py

+import Qt
+import QuickTime
+import macfs
+import Qd
+from QuickDraw import srcCopy
+from ExtPixMapWrapper import ExtPixMapWrapper
+from Qdoffs import *
+import ImageMac
+import W
+
+
+
+	
+def GetFrames(m):
+	frameCount=0
+	theTime=0
+	type=QuickTime.VideoMediaType
+	#type='MPEG'
+	flags=QuickTime.nextTimeMediaSample
+	flags=flags+QuickTime.nextTimeEdgeOK
+	
+	while theTime>=0:
+		(theTime,duration)=m.GetMovieNextInterestingTime(flags,1,type,theTime,0)
+		#print "theTime ",theTime,"   duration ",duration
+		frameCount=frameCount+1
+		flags = QuickTime.nextTimeMediaSample
+	
+	
+	return frameCount-1
+	
+def GetMovieFromOpenFile():
+	fss, ok = macfs.StandardGetFile(QuickTime.MovieFileType)
+	mov = None
+	if  ok:
+		movieResRef = Qt.OpenMovieFile(fss, 1)
+		mov, d1, d2 = Qt.NewMovieFromFile(movieResRef, 0, QuickTime.newMovieActive)
+		
+	return mov
+
+
+class ExtMovie:
+	def __init__(self,mov):
+		
+		self.frames=0
+		self.frameArray=[]
+		self.movie=mov
+		self._countFrames()
+		r=self.movie.GetMovieBox()
+		self.myRect=(0,0,r[2]-r[0],r[3]-r[1])
+		self.movie.SetMovieBox(self.myRect)
+		self.pm=ExtPixMapWrapper()
+		self.pm.left=0
+		self.pm.top=0
+		self.pm.right=r[2]-r[0]
+		self.pm.bottom=r[3]-r[1]
+		self.gw=NewGWorld(32,self.myRect,None,None,0)
+		self.movie.SetMovieGWorld(self.gw.as_GrafPtr(), self.gw.GetGWorldDevice())
+		self.GotoFrame(0)
+			
+	def _countFrames(self):
+		#deve contare il numero di frame, creare un array con i tempi per ogni frame
+		theTime=0
+		#type=QuickTime.VIDEO_TYPE
+		type=QuickTime.VideoMediaType
+		flags=QuickTime.nextTimeMediaSample+QuickTime.nextTimeEdgeOK
+		
+		while theTime>=0:
+			(theTime,duration)=self.movie.GetMovieNextInterestingTime(flags,1,type,theTime,0)
+			self.frameArray.append((theTime,duration))
+			flags = QuickTime.nextTimeMediaSample
+			self.frames=self.frames+1	
+		
+		
+	
+	def GotoFrame(self,n):
+		if n<=self.frames:
+			self.curFrame=n
+			(port,device)=GetGWorld()
+			SetGWorld(self.gw.as_GrafPtr(),None)
+			(self.now,self.duration)=self.frameArray[n]
+			self.movie.SetMovieTimeValue(self.now)
+			pixmap=self.gw.GetGWorldPixMap()
+			
+			if not LockPixels(pixmap):
+				print "not locked"
+			else:
+			
+				#Qd.EraseRect(self.myRect)
+				#this draws the frame inside the current gworld
+				self.movie.MoviesTask(0)
+				#this puts it in the buffer pixmap 
+				self.pm.grab(0,0,self.myRect[2],self.myRect[3])
+				UnlockPixels(pixmap)
+				#self.im=self.pm.toImage()
+			SetGWorld(port,device)
+		
+	def NextFrame(self):
+		self.curFrame=self.curFrame+1
+		if self.curFrame>self.frames:
+			self.curFrame=0
+		self.GotoFrame(self.curFrame)
+	
+	def isLastFrame():
+		return self.curFrame==self.frames
+		
+		
+	def GetImage(self):
+		return self.pm.toImage()
+		
+	def GetImageN(self,n):
+		self.GotoFrame(n)
+		return self.pm.toImage()
+		
+	def GetNumeric(self):
+		return self.pm.toNumeric()
+		
+	def GetNumericN(self,n):
+		self.GotoFrame(n)
+		return self.pm.toNumeric()
+		
+	def Blit(self,destRect):
+		Qd.RGBForeColor( (0,0,0) )
+		Qd.RGBBackColor((65535, 65535, 65535))
+		
+		#Qd.MoveTo(10,10)
+		#Qd.LineTo(200,150)
+		Qd.CopyBits(self.gw.portBits,Qd.GetPort().portBits,self.myRect,destRect,srcCopy,None)
+
+class MovieWin(W.Window):
+	
+	def __init__(self,eMovie,title="MovieWin"):
+		self.ExtMovie=eMovie		
+		
+def test():
+	import ImageFilter
+	from MLab import max
+	from MLab import min
+	from Numeric import *
+	Qt.EnterMovies()
+	m=GetMovieFromOpenFile()
+	em=ExtMovie(m)
+	print "Total frames:",em.frames,"  Current frame:",em.curFrame	
+	#ImageMac.showImage(em.GetImage(),"frame 0",1)
+	#em.GotoFrame(500)
+	#ImageMac.showImage(em.GetImage().filter(ImageFilter.SMOOTH),"frame 500",2)
+	#ImageMac.showImage(em.GetImageN(1000),"frame 1000",2)
+	#r=array(((1,0,0,0),(0,0,0,0),(0,0,0,0),(0,0,0,0)))
+	#g=array(((0,0,0,0),(0,1,0,0),(0,0,0,0),(0,0,0,0)))
+	#b=array(((0,0,0,0),(0,0,0,0),(0,0,1,0),(0,0,0,0)))
+	#bw=array(((0.3086,0.6094,0.0820,0)))
+	#r2=array(((1,0,0,0)))
+	#ImageMac.showNumeric(em.GetNumericN(0),"frame 0",1)
+	#print em.GetNumericN(500).shape
+	#print "original (1,1)",em.GetNumericN(0)[100,100]
+	#print "product shape ",innerproduct(em.GetNumericN(0),r).shape
+	#print "product (1,1) ",innerproduct(em.GetNumericN(0),r)[100,100]
+	
+	#ImageMac.showNumeric(ImageMac.BWImage(em.GetNumericN(50)))
+	#ImageMac.showNumeric(innerproduct(em.GetNumericN(500),r),"frame 500r",2)
+	#ImageMac.showNumeric(innerproduct(em.GetNumericN(500),g),"frame 500g",2)
+	#ImageMac.showNumeric(innerproduct(em.GetNumericN(500),b),"frame 500b",2)
+	
+	#ImageMac.showNumeric(innerproduct(em.GetNumericN(500),r2),"frame 500r2",2)
+	#ImageMac.showNumeric(innerproduct(em.GetNumericN(10),bw),"frame 0bw",1)
+	#ImageMac.showNumeric(innerproduct(em.GetNumericN(400),bw),"frame 10bw",1)
+	#colordif=(em.GetNumericN(100)-em.GetNumericN(10))+(255,255,255,255)
+	#colordif=colordif/2
+	#ImageMac.showNumeric(colordif,"colordif",1)
+	#ImageMac.showNumeric(ImageMac.BWImage(colordif),"bwcolordif",1)
+	ilut=arange(0,256)
+	#ilut[118]=255
+	#ilut[119]=255
+	#ilut[120]=255
+	ilut[121]=255
+	ilut[122]=255
+	ilut[123]=255
+	ilut[124]=255
+	ilut[125]=255
+	ilut[126]=255
+	ilut[127]=255
+	ilut[128]=255
+	ilut[129]=255
+	#ilut[130]=255
+	#ilut[131]=255
+	#ilut[132]=255
+	mlut=ones(256)
+	mlut[118]=0
+	mlut[119]=0
+	mlut[120]=0
+	mlut[121]=0
+	mlut[122]=0
+	mlut[123]=0
+	mlut[124]=0
+	mlut[125]=0
+	mlut[126]=0
+	mlut[127]=0
+	mlut[128]=0
+	mlut[129]=0
+	mlut[130]=0
+	mlut[131]=0
+	mlut[132]=0
+	
+	ImageMac.showImage(em.GetImageN(100),"provaImg",2)
+	ImageMac.showNumeric(em.GetNumericN(100),"provaNum",2)
+	ImageMac.showImage(em.GetImageN(100).filter(ImageFilter.SMOOTH),"frame 500",2)
+	#image=ImageMac.BWImage(em.GetNumericN(100))
+	#ImageMac.showNumeric(image)
+	
+	
+	
+	
+	
+	
+	
+	
+	#difimage=abs(image-ImageMac.BWImage(em.GetNumericN(10)))
+	#ImageMac.PlotHisto(difimage,32)
+	#ImageMac.showNumeric(difimage)
+	#difimage=127+(image-ImageMac.BWImage(em.GetNumericN(10)))/2
+	#ImageMac.PlotHisto(difimage,32)
+	#ImageMac.showNumeric(difimage)
+	#fimage=ImageMac.Filter3x3(16.0,(1,1,1,1,8,1,1,1,1),difimage)
+	#ImageMac.showNumeric(fimage)
+	#difimage2=choose(fimage.astype(UnsignedInt8),ilut)
+	#ImageMac.showNumeric(difimage2)
+	
+	#(r,g,b,a)=ImageMac.SplitBands(em.GetNumericN(10))
+	#ImageMac.showNumeric(r,"r")
+	#ImageMac.showNumeric(g,"g")
+	#ImageMac.showNumeric(b,"b")
+	#ImageMac.showNumeric(a,"a")
+	#bwdif=abs(((innerproduct(em.GetNumericN(400),bw)-innerproduct(em.GetNumericN(10),bw))+255)/2)
+	#ImageMac.showNumeric(bwdif,"frame diff/bw",1)
+	#ImageMac.PlotHisto(bwdif)
+	#ImageMac.showNumeric(choose(bwdif.astype(UnsignedInt8),ilut),"frame diff/bw",1)
+	#ImageMac.PlotHisto(choose(bwdif.astype(UnsignedInt8),ilut))
+	#bwimage=ImageMac.BWImage(em.GetNumericN(100))
+	#ImageMac.showNumeric((ImageMac.BWImage(em.GetNumericN(90))+ImageMac.BWImage(em.GetNumericN(110))+ImageMac.BWImage(em.GetNumericN(130))+ImageMac.BWImage(em.GetNumericN(150))+ImageMac.BWImage(em.GetNumericN(170)))/5)
+	#bwdif=abs(((bwimage-ImageMac.BWImage(em.GetNumericN(10)))+255)/2)
+	#ImageMac.showNumeric(bwimage,"original frame",1)
+	#ImageMac.showNumeric(bwdif,"frame diff/bw",1)
+	#ImageMac.PlotHisto(bwdif)
+	#ImageMac.showNumeric(choose(bwdif.astype(UnsignedInt8),ilut),"frame diff/bw",1)
+	#mmask=choose(bwdif.astype(UnsignedInt8),mlut)
+	#ImageMac.showNumeric(255-255*mmask,"frame diff/bw",1)
+	#mmask.shape=bwimage.shape
+	#ImageMac.showNumeric(mmask*bwimage,"frame diff/bw",1)
+	
+	#ImageMac.showNumeric((innerproduct(em.GetNumericN(300),bw)-innerproduct(em.GetNumericN(0),bw)),"frame diff/bw",1)
+	#ImageMac.showNumeric((innerproduct(em.GetNumericN(400)-em.GetNumericN(10),bw)),"frame diff2/bw",1)
+	#cdif=em.GetNumericN(400)-em.GetNumericN(10)
+	#ImageMac.showNumeric(,"frame diff2/bw",1)
+	
+	#ImageMac.showNumeric(innerproduct(cdif,r),"frame 500r",1)
+	#ImageMac.showNumeric(innerproduct(cdif,g),"frame 500g",1)
+	#ImageMac.showNumeric(innerproduct(cdif,b),"frame 500b",1)
+def test2():
+	Qt.EnterMovies()
+	m=GetMovieFromOpenFile()
+	if m==None:
+		print "no movie opened"
+	else:
+		em=ExtMovie(m)
+		print "Total frames: ",em.frames,"  Current frame:",em.curFrame
+		ImageMac.showImage(em.GetImage(),"frame 0",1)
+
+if __name__ == '__main__':
+	test2()
+		
\ No newline at end of file

Mac/Contrib/ImageHelpers/ReadMe

+ExtPixMapWrapper.py
+ImageMac.py
+Hello these are the classes to deal with Images and NumPy arrays I told
+you about. I left everything unchanged, it is the same copy I use with 
+comments added. However I think that in ImageMac the only part worth including
+in MacPython (if you think it is worth), is the first half, until GimmeImage.
+After that it is almost rubbish I used in my CV experiments.
+
+MovieUtils.py
+This is another class I use. IT contais a lot of my experiments (unuseful), but
+the first function GetFrames(). it is almost the translation of a QT sample.
+GetMovieFromOpenFile() it is the usual shortcut to get a movie. (no error tracking
+done).
+The class ExtMovie requires a movie in the constructor and then
+provides a method to take every single frame and convert it to an
+Image or a NUmPy array.
+If you think that it can be included in the qt examples I'll write comments and
+polish it a bit. (exceptions handling)
+
+		Riccardo Trocca
+
+P.S. Everything works with 2.0b1