def getPoint(self, x):
e = utils.entropy(self.data, 32, x, len(self.symbol_map))
# http://www.wolframalpha.com/input/?i=plot+%284%28x-0.5%29-4%28x-0.5%29**2%29**4+from+0.5+to+1
def curve(v):
f = (4 * v - 4 * v**2)**4
f = max(f, 0)
return f
r = curve(e - 0.5) if e > 0.5 else 0
b = e**2
red = int(255 * r)
blue = int(255 * b)
c = ord(self.data[x])
if c == 0:
return [red, 0, blue]
elif c == 255:
return [red, 255, blue]
elif chr(c) in string.ascii_lowercase:
return [red, 126, blue]
elif chr(c) in string.ascii_uppercase:
return [red, 63, blue]
elif chr(c) in string.digits:
return [red, 32, blue]
elif chr(c) in string.punctuation:
return [red, 16, blue]
return [red, 8, blue]
def getPoint(self, x):
e = utils.entropy(self.data, 32, x, len(self.symbol_map))
# http://www.wolframalpha.com/input/?i=plot+%284%28x-0.5%29-4%28x-0.5%29**2%29**4+from+0.5+to+1
def curve(v):
f = (4 * v - 4 * v**2)**4
f = max(f, 0)
return f
r = curve(e - 0.5) if e > 0.5 else 0
b = e**2
red = int(255 * r)
blue = int(255 * b)
c = ord(self.data[x])
if c == 0:
return [red, 0, blue]
elif c == 255:
return [red, 255, blue]
elif c in range(0, 16):
return [red, 1, blue]
elif c in range(16, 32):
return [red, 17, blue]
elif c in range(32, 48):
return [red, 33, blue]
elif c in range(48, 64):
return [red, 49, blue]
elif c in range(64, 80):
return [red, 65, blue]
elif c in range(80, 96):
return [red, 81, blue]
elif c in range(96, 112):
return [red, 97, blue]
elif c in range(112, 128):
return [red, 113, blue]
elif c in range(128, 144):
return [red, 129, blue]
elif c in range(144, 160):
return [red, 145, blue]
elif c in range(160, 176):
return [red, 161, blue]
elif c in range(176, 192):
return [red, 177, blue]
elif c in range(192, 208):
return [red, 193, blue]
elif c in range(208, 224):
return [red, 209, blue]
elif c in range(224, 240):
return [red, 225, blue]
else:
return [red, 26, blue]
def getPoint(self, x):
e = utils.entropy(self.data, 32, x, len(self.symbol_map))
# http://www.wolframalpha.com/input/?i=plot+%284%28x-0.5%29-4%28x-0.5%29**2%29**4+from+0.5+to+1
def curve(v):
f = (4 * v - 4 * v**2)**4
f = max(f, 0)
return f
r = curve(e - 0.5) if e > 0.5 else 0
b = e**2
return [int(255 * r), 0, int(255 * b)]
def test_entropy(self):
tutils.raises(ValueError, utils.entropy, "foo", 64, 0)
assert utils.entropy("a"*64, 64, 1) == 0
d = "".join([chr(i) for i in range(256)])
assert utils.entropy(d, 64, 1) == 1