def palm_position_histogram(frames, bins=8, range=(-1., 1.)):
"""
Feature based on a 3d histogram of the normalized positions of each palm
"""
length = range[1] - range[0]
bin_size = length / bins
def hround(v):
return min(bins - 1, int((v - range[0]) / bin_size))
l = list_3d(bins)
positions = []
for frame in frames:
for hand in frame.hands():
palm = hand.palm()
if palm:
p = palm.position
positions.append(p)
average_p = utils.ave_v(positions)
for index, position in enumerate(positions):
positions[index] = utils.subtract(position, average_p)
v = positions[index]
x = v.x / utils.norm(v)
y = v.y / utils.norm(v)
z = v.z / utils.norm(v)
l[hround(x)][hround(y)][hround(z)] += 1
return l
def palm_position_histogram(frames,bins = 8,range=(-1.,1.)):
"""
Feature based on a 3d histogram of the normalized positions of each palm
"""
length = range[1]-range[0]
bin_size = length/bins
def hround(v):
return min(bins-1,int((v-range[0])/bin_size))
l = list_3d(bins)
positions = []
for frame in frames:
for hand in frame.hands():
palm = hand.palm()
if palm:
p = palm.position
positions.append(p)
average_p = utils.ave_v(positions)
for index,position in enumerate(positions):
positions[index] = utils.subtract(position,average_p)
v = positions[index]
x = v.x/utils.norm(v)
y = v.y/utils.norm(v)
z = v.z/utils.norm(v)
l[hround(x)][hround(y)][hround(z)] += 1
return l
def position_histogram(frames,bins = 4,range=(-1.,1.)):
length = range[1]-range[0]
bin_size = length/bins
def hround(v):
return min(bins-1,int((v-range[0])/bin_size))
l = list_3d(bins)
positions = []
for frame in frames:
for hand in frame.hands():
for finger in hand.fingers():
p = finger.tip().position
positions.append(p)
average_p = utils.ave_v(positions)
for index,position in enumerate(positions):
positions[index] = utils.subtract(position,average_p)
v = positions[index]
x = v.x/utils.norm(v)
y = v.y/utils.norm(v)
z = v.z/utils.norm(v)
l[hround(x)][hround(y)][hround(z)] += 1
return l
def position_histogram(frames, bins=8, range=(-1., 1.)):
length = range[1] - range[0]
bin_size = length / bins
def hround(v):
return min(bins - 1, int((v - range[0]) / bin_size))
l = list_3d(bins)
positions = []
for frame in frames:
for hand in frame.hands():
for finger in hand.fingers():
p = finger.tip().position
positions.append(p)
average_p = utils.ave_v(positions)
for index, position in enumerate(positions):
positions[index] = utils.subtract(position, average_p)
v = positions[index]
x = v.x / utils.norm(v)
y = v.y / utils.norm(v)
z = v.z / utils.norm(v)
l[hround(x)][hround(y)][hround(z)] += 1
return l