Exemple #1
0
class Training:

	def __init__(self, nose_cascade = None, face_cascade = None, eye_cascade = None, sample = None):
		#if nose_cascade or face_cascade is None: warnings.warn('Some of the cascades are still None')
		self.nose = Image_X(nose_cascade)
		self.face = Image_X(face_cascade)
		self.eye = Image_X(eye_cascade)
		val = self.GetDimensions(sample)
		self.dimensions = val['dimensions']
		self.dist = val['distance']

	def alignImage(self, PATH, image):
		try:
			for filename, image in self.eye.alignEyes(image).iteritems():
				self.save(PATH, **{filename : image})
				return image
		except:
			try:
				self.IdError(image)
			except:
				pass

	def GetDimensions(self, filename):
		img = cv2.imread(filename)
		val = self.GetCentre(filename)
		centre = val['centre']
		#return (up, down, left, right)
		try:
			return {'dimensions' : (img.shape[1] - centre[1], centre[1], centre[0], img.shape[0] - centre[0]),
					'distance' : val['dist']}
		except:
			return None

	def GetCentre(self, filename):
		img = cv2.imread(filename)
		eye = self.eye.ShiTomasiCornerDetect(filename)
		try:
			return {'centre' : ((eye[0][0]+eye[1][0])/2., eye[0][1]), 'dist' : abs(eye[0][0]-eye[1][0])}
		except:
			return None

	def IdError(self, image):
		'''Delete the image'''
		try:
			os.remove(image)
		except:
			pass

	def Resize(self, filename):
		try:
			dist = self.GetCentre(filename)['dist']
		except:
			self.IdError(filename)
			return
		scaleFactor = self.dist/float(dist)
		return cv2.resize(cv2.imread(filename), (0,0), fx = scaleFactor, fy = scaleFactor)

	def faceIdentify(self, image):
		for filename, list_of_parameters in self.face.identify(image).iteritems():
			if len(list_of_parameters) is not 1:
				#self.IdError(image)
				return None
			for (x, y, w, h) in list_of_parameters:
				return (w, h)

	def alignFace(self, image):
		'''
		x -> left
		y -> down
		w -> right + left
		h -> up + down
		'''
		#image = self.alignedImage(image)
		try:
			centre = self.GetCentre(image)['centre']
			dim = self.dimensions
		except:
			self.IdError(image)
		try:
			return (centre[0] - dim[2],
					centre[1] - dim[1],
					dim[2] + dim[3],
					dim[0] + dim[1])
		except:
			return None

	def crop(self, image):
		x = self.alignFace(image)
		try:
			return self.face.getImg(image)[x[1]:x[1]+x[3] , x[0]:x[0]+x[2]]
		except:
			self.IdError(image)
			return None

	def save(self, PATH, **kwargs):
		os.chdir(PATH)
		for filename, image in kwargs.iteritems():
			if image is not None:
				print "Saved {0} image".format(filename)
				cv2.imwrite(filename , image)
			else:
				print "Not saved {0}".format(filename)
		return