def jitter( self, i_image , i_n_examples ):
"""1) Apply various random affine transform to i_image (scale, rotation),
where i_n_examples is the number of transformations. The affine transforms happen
around the center of the original region of interest.
2) Translate roi with various values - crop the image from this region.
3) The same normalisation is then applied to all the cropped images, specified by setParams"""
#Store transforms applied in format tx ty scale angle
o_transforms = numpy.array([0., 0., 1., 0.])
if self.__roi == None:
print "No region of interest - returning input image!"
return None
#Always return the normalised verion of the input image
image = cv.Ipl2NumPy(self.normalise(i_image))
o_data = numpy.tile( None, (image.shape[0], image.shape[1], 1))
o_data[:,:,0] = image
if i_n_examples == 0:
return ( o_data, o_transforms)
#Rotation point should be around original roi center
center = cv.cvPoint2D32f( self.__roi.x + self.__roi.width/2,self.__roi.y + self.__roi.height/2 )
angles = numpy.random.uniform(-30.,30.,i_n_examples)
scales = numpy.random.uniform(0.9,1.1, i_n_examples)
tx = numpy.int32( numpy.round( numpy.random.uniform(-20,20,i_n_examples)))
ty = numpy.int32( numpy.round( numpy.random.uniform(-20,20,i_n_examples)))
x = self.__roi.x + tx
y = self.__roi.y + ty
#FIXME: Extend valid indices to outliers due to affine transform!!!
min_x = 0; min_y = 0;
max_x = i_image.width - self.__roi.width - 1
max_y = i_image.height - self.__roi.height - 1
valid_x = numpy.hstack([numpy.nonzero( x >= min_x )[0], numpy.nonzero( x < max_x)[0]])
valid_y = numpy.hstack([numpy.nonzero( y >= min_y )[0], numpy.nonzero( y < max_y)[0]])
valid_idx = numpy.unique(numpy.hstack([valid_x, valid_y]))
original_roi = cv.cvRect( self.__roi.x, self.__roi.y, self.__roi.width, self.__roi.height)
if self.__rot_mat == None:
original_rot_matrix = None
else:
original_rot_matrix = cv.cvCloneImage(self.__rot_mat)
for index in valid_idx:
params = numpy.array([tx[index], ty[index], scales[index], angles[index] ])
self.setAffineTransform( center, scales[index], angles[index])
self.__roi.x = int( x[index] )
self.__roi.y = int( y[index] )
image = cv.Ipl2NumPy(self.normalise( i_image ))
o_data = numpy.dstack( [o_data, image])
o_transforms = numpy.vstack( [o_transforms, params])
#Restore the original region of interest
self.__roi.x = original_roi.x
self.__roi.y = original_roi.y
if original_rot_matrix == None:
self.__rot_mat= None
else:
self.__rot_mat = cv.cvCloneImage(original_rot_matrix)
return (o_data, o_transforms)
def correctImage(self, i_image, i_transform):
roi = self.getRoi()
tx = numpy.int( numpy.round( i_transform[0] ) )
ty = numpy.int( numpy.round( i_transform[1] ) )
roi.x += tx
roi.y += ty
self.setRoi(roi)
scale = i_transform[2]
angle = i_transform[3]
center = cv.cvPoint2D32f( self.__roi.x + self.__roi.width/2,self.__roi.y + self.__roi.height/2 )
self.setAffineTransform( center, scale, angle)
o_image = self.normalise(i_image)
return cv.Ipl2NumPy(o_image)
def correctImage(self, i_image, i_transform):
roi = self.getRoi()
tx = numpy.int(numpy.round(i_transform[0]))
ty = numpy.int(numpy.round(i_transform[1]))
roi.x += tx
roi.y += ty
self.setRoi(roi)
scale = i_transform[2]
angle = i_transform[3]
center = cv.cvPoint2D32f(self.__roi.x + self.__roi.width / 2,
self.__roi.y + self.__roi.height / 2)
self.setAffineTransform(center, scale, angle)
o_image = self.normalise(i_image)
return cv.Ipl2NumPy(o_image)
def similarityTransform(self, i_image, i_transform, i_crop=True ):
"""Apply affine transform around center of region of interest, then translate roi"""
tx = numpy.int32(numpy.round(i_transform[0]))
ty = numpy.int32(numpy.round(i_transform[1]))
scale = i_transform[2]
angle = i_transform[3]
center = cv.cvPoint2D32f( self.__roi.x + self.__roi.width/2,self.__roi.y + self.__roi.height/2 )
self.setAffineTransform( center, scale, angle)
original_roi = cv.cvRect( self.__roi.x, self.__roi.y, self.__roi.width, self.__roi.height)
if not i_crop:
self.__roi = None
else:
self.__roi.x = self.__roi.x + int(tx)
self.__roi.y = self.__roi.y + int(ty)
filter_size = self.__filter_size
self.__filter_size = 0
o_image = self.normalise(i_image)
self.__filter_size = filter_size
self.__roi = cv.cvRect(original_roi.x, original_roi.y, original_roi.width, original_roi.height)
return cv.Ipl2NumPy(o_image)
def similarityTransform(self, i_image, i_transform, i_crop=True):
"""Apply affine transform around center of region of interest, then translate roi"""
tx = numpy.int32(numpy.round(i_transform[0]))
ty = numpy.int32(numpy.round(i_transform[1]))
scale = i_transform[2]
angle = i_transform[3]
center = cv.cvPoint2D32f(self.__roi.x + self.__roi.width / 2,
self.__roi.y + self.__roi.height / 2)
self.setAffineTransform(center, scale, angle)
original_roi = cv.cvRect(self.__roi.x, self.__roi.y, self.__roi.width,
self.__roi.height)
if not i_crop:
self.__roi = None
else:
self.__roi.x = self.__roi.x + int(tx)
self.__roi.y = self.__roi.y + int(ty)
filter_size = self.__filter_size
self.__filter_size = 0
o_image = self.normalise(i_image)
self.__filter_size = filter_size
self.__roi = cv.cvRect(original_roi.x, original_roi.y,
original_roi.width, original_roi.height)
return cv.Ipl2NumPy(o_image)
def jitter(self, i_image, i_n_examples):
"""1) Apply various random affine transform to i_image (scale, rotation),
where i_n_examples is the number of transformations. The affine transforms happen
around the center of the original region of interest.
2) Translate roi with various values - crop the image from this region.
3) The same normalisation is then applied to all the cropped images, specified by setParams"""
#Store transforms applied in format tx ty scale angle
o_transforms = numpy.array([0., 0., 1., 0.])
if self.__roi == None:
print "No region of interest - returning input image!"
return None
#Always return the normalised verion of the input image
image = cv.Ipl2NumPy(self.normalise(i_image))
o_data = numpy.tile(None, (image.shape[0], image.shape[1], 1))
o_data[:, :, 0] = image
if i_n_examples == 0:
return (o_data, o_transforms)
#Rotation point should be around original roi center
center = cv.cvPoint2D32f(self.__roi.x + self.__roi.width / 2,
self.__roi.y + self.__roi.height / 2)
angles = numpy.random.uniform(-30., 30., i_n_examples)
scales = numpy.random.uniform(0.9, 1.1, i_n_examples)
tx = numpy.int32(
numpy.round(numpy.random.uniform(-20, 20, i_n_examples)))
ty = numpy.int32(
numpy.round(numpy.random.uniform(-20, 20, i_n_examples)))
x = self.__roi.x + tx
y = self.__roi.y + ty
#FIXME: Extend valid indices to outliers due to affine transform!!!
min_x = 0
min_y = 0
max_x = i_image.width - self.__roi.width - 1
max_y = i_image.height - self.__roi.height - 1
valid_x = numpy.hstack(
[numpy.nonzero(x >= min_x)[0],
numpy.nonzero(x < max_x)[0]])
valid_y = numpy.hstack(
[numpy.nonzero(y >= min_y)[0],
numpy.nonzero(y < max_y)[0]])
valid_idx = numpy.unique(numpy.hstack([valid_x, valid_y]))
original_roi = cv.cvRect(self.__roi.x, self.__roi.y, self.__roi.width,
self.__roi.height)
if self.__rot_mat == None:
original_rot_matrix = None
else:
original_rot_matrix = cv.cvCloneImage(self.__rot_mat)
for index in valid_idx:
params = numpy.array(
[tx[index], ty[index], scales[index], angles[index]])
self.setAffineTransform(center, scales[index], angles[index])
self.__roi.x = int(x[index])
self.__roi.y = int(y[index])
image = cv.Ipl2NumPy(self.normalise(i_image))
o_data = numpy.dstack([o_data, image])
o_transforms = numpy.vstack([o_transforms, params])
#Restore the original region of interest
self.__roi.x = original_roi.x
self.__roi.y = original_roi.y
if original_rot_matrix == None:
self.__rot_mat = None
else:
self.__rot_mat = cv.cvCloneImage(original_rot_matrix)
return (o_data, o_transforms)
data = image_utils.Video2Numpy("recordings/calibration.avi", 1)
detector = ViolaJonesRoi()
#Compute a region of interest automatically
face_roi = detector.compute(data)
eye_roi = detector.convertFace2EyeRoi(face_roi)
detector.setRoi(eye_roi)
(min_row, min_col, max_row, max_col) = eye_roi
roi = image_utils.Numpy2CvRect(min_row, min_col, max_row, max_col)
#Setup normaliser
normaliser = IplImageNormaliser()
normaliser.setParams(i_resize_scale=1.,
i_filter_size=0,
i_eq=False,
i_roi=roi)
center = cv.cvPoint2D32f(roi.x + roi.width / 2, roi.y + roi.height / 2)
normaliser.setAffineTransform(center, i_scale=1., i_rot_angle=0)
nframe = 0
app = QtGui.QApplication(argv)
timer = QtCore.QTimer()
n_jitter_examples = 5
display = ImageDisplay(n_jitter_examples + 2)
(jittered_images, transforms,
n_jittered) = normaliser.jitter_video(data, n_jitter_examples)
nframe = 0
def updateDisplay():
global nframe
rows = max_row - min_row
cols = max_col - min_col
from roi_detector import ViolaJonesRoi
data = image_utils.Video2Numpy("recordings/calibration.avi", 1)
detector = ViolaJonesRoi()
#Compute a region of interest automatically
face_roi= detector.compute(data)
eye_roi = detector.convertFace2EyeRoi(face_roi)
detector.setRoi(eye_roi)
(min_row, min_col, max_row, max_col) = eye_roi
roi = image_utils.Numpy2CvRect(min_row, min_col, max_row, max_col)
#Setup normaliser
normaliser = IplImageNormaliser()
normaliser.setParams(i_resize_scale=1., i_filter_size=0, i_eq=False, i_roi=roi)
center = cv.cvPoint2D32f( roi.x + roi.width/2, roi.y + roi.height/2 )
normaliser.setAffineTransform(center, i_scale=1., i_rot_angle=0)
nframe = 0
app = QtGui.QApplication(argv)
timer = QtCore.QTimer()
n_jitter_examples = 5
display = ImageDisplay(n_jitter_examples + 2)
(jittered_images, transforms, n_jittered) = normaliser.jitter_video(data, n_jitter_examples)
nframe = 0
def updateDisplay():
global nframe
rows = max_row - min_row
cols = max_col - min_col
if nframe >= data.shape[2]:
