Gecko [ technovaaa.co.uk ]

Name	Size	Permission	Date
__pycache__	[ DIR ]	drwxr-xr-x	2025-08-15 19:31
asyncio	[ DIR ]	drwxr-xr-x	2025-08-15 19:31
collections	[ DIR ]	drwxr-xr-x	2025-08-15 19:31
concurrent	[ DIR ]	drwxr-xr-x	2025-08-15 19:31
config-3.6m	[ DIR ]	drwxr-xr-x	2025-08-15 19:32
ctypes	[ DIR ]	drwxr-xr-x	2025-08-15 19:31
curses	[ DIR ]	drwxr-xr-x	2025-08-15 19:31
dbm	[ DIR ]	drwxr-xr-x	2025-08-15 19:31
distutils	[ DIR ]	drwxr-xr-x	2025-08-15 19:31
email	[ DIR ]	drwxr-xr-x	2025-08-15 19:31
encodings	[ DIR ]	drwxr-xr-x	2025-08-15 19:31
ensurepip	[ DIR ]	drwxr-xr-x	2025-08-15 19:31
html	[ DIR ]	drwxr-xr-x	2025-08-15 19:31
http	[ DIR ]	drwxr-xr-x	2025-08-15 19:31
idlelib	[ DIR ]	drwxr-xr-x	2025-08-15 19:31
importlib	[ DIR ]	drwxr-xr-x	2025-08-15 19:31
json	[ DIR ]	drwxr-xr-x	2025-08-15 19:31
lib-dynload	[ DIR ]	drwxr-xr-x	2025-08-15 19:31
lib2to3	[ DIR ]	drwxr-xr-x	2025-08-15 19:31
logging	[ DIR ]	drwxr-xr-x	2025-08-15 19:31
multiprocessing	[ DIR ]	drwxr-xr-x	2025-08-15 19:31
pydoc_data	[ DIR ]	drwxr-xr-x	2025-08-15 19:31
site-packages	[ DIR ]	drwxr-xr-x	2025-08-15 19:31
sqlite3	[ DIR ]	drwxr-xr-x	2025-08-15 19:31
test	[ DIR ]	drwxr-xr-x	2025-08-15 19:31
unittest	[ DIR ]	drwxr-xr-x	2025-08-15 19:31
urllib	[ DIR ]	drwxr-xr-x	2025-08-15 19:31
venv	[ DIR ]	drwxr-xr-x	2025-08-15 19:31
wsgiref	[ DIR ]	drwxr-xr-x	2025-08-15 19:31
xml	[ DIR ]	drwxr-xr-x	2025-08-15 19:31
xmlrpc	[ DIR ]	drwxr-xr-x	2025-08-15 19:31
__future__.py	4.73 KB	-rw-r--r--	2024-04-17 17:32
__phello__.foo.py	64 B	-rw-r--r--	2024-04-17 17:32
_bootlocale.py	1.27 KB	-rw-r--r--	2024-04-17 17:32
_collections_abc.py	25.77 KB	-rw-r--r--	2024-04-17 17:32
_compat_pickle.py	8.54 KB	-rw-r--r--	2024-04-17 17:32
_compression.py	5.21 KB	-rw-r--r--	2024-04-17 17:32
_dummy_thread.py	5 KB	-rw-r--r--	2024-04-17 17:32
_markupbase.py	14.26 KB	-rw-r--r--	2024-04-17 17:32
_osx_support.py	18.69 KB	-rw-r--r--	2024-04-17 17:32
_pydecimal.py	224.83 KB	-rw-r--r--	2024-04-17 17:32
_pyio.py	86.03 KB	-rw-r--r--	2024-04-17 17:32
_sitebuiltins.py	3.04 KB	-rw-r--r--	2024-04-17 17:32
_strptime.py	24.17 KB	-rw-r--r--	2024-04-17 17:32
_sysconfigdata_dm_linux_x86_64-linux-gnu.py	28.89 KB	-rw-r--r--	2024-04-17 17:32
_sysconfigdata_m_linux_x86_64-linux-gnu.py	27.86 KB	-rw-r--r--	2024-04-17 17:32
_threading_local.py	7.04 KB	-rw-r--r--	2024-04-17 17:32
_weakrefset.py	5.57 KB	-rw-r--r--	2024-04-17 17:32
abc.py	8.52 KB	-rw-r--r--	2024-04-17 17:32
aifc.py	31.69 KB	-rw-r--r--	2024-04-17 17:32
antigravity.py	477 B	-rw-r--r--	2024-04-17 17:32
argparse.py	88.25 KB	-rw-r--r--	2024-04-17 17:32
ast.py	11.88 KB	-rw-r--r--	2024-04-17 17:32
asynchat.py	11.06 KB	-rw-r--r--	2024-04-17 17:32
asyncore.py	19.69 KB	-rw-r--r--	2024-04-17 17:32
base64.py	19.91 KB	-rwxr-xr-x	2024-04-17 17:32
bdb.py	23 KB	-rw-r--r--	2024-04-17 17:32
binhex.py	13.63 KB	-rw-r--r--	2024-04-17 17:32
bisect.py	2.53 KB	-rw-r--r--	2024-04-17 17:32
bz2.py	12.19 KB	-rw-r--r--	2024-04-17 17:32
cProfile.py	5.26 KB	-rwxr-xr-x	2024-04-17 17:32
calendar.py	22.67 KB	-rw-r--r--	2024-04-17 17:32
cgi.py	36.21 KB	-rwxr-xr-x	2024-04-17 17:32
cgitb.py	11.74 KB	-rw-r--r--	2024-04-17 17:32
chunk.py	5.3 KB	-rw-r--r--	2024-04-17 17:32
cmd.py	14.51 KB	-rw-r--r--	2024-04-17 17:32
code.py	10.37 KB	-rw-r--r--	2024-04-17 17:32
codecs.py	35.43 KB	-rw-r--r--	2024-04-17 17:32
codeop.py	5.85 KB	-rw-r--r--	2024-04-17 17:32
colorsys.py	3.97 KB	-rw-r--r--	2024-04-17 17:32
compileall.py	11.84 KB	-rw-r--r--	2024-04-17 17:32
configparser.py	52.34 KB	-rw-r--r--	2024-04-17 17:32
contextlib.py	12.85 KB	-rw-r--r--	2024-04-17 17:32
copy.py	8.61 KB	-rw-r--r--	2024-04-17 17:32
copyreg.py	6.84 KB	-rw-r--r--	2024-04-17 17:32
crypt.py	1.82 KB	-rw-r--r--	2024-04-17 17:32
csv.py	15.8 KB	-rw-r--r--	2024-04-17 17:32
datetime.py	80.11 KB	-rw-r--r--	2024-04-17 17:32
decimal.py	320 B	-rw-r--r--	2024-04-17 17:32
difflib.py	82.4 KB	-rw-r--r--	2024-04-17 17:32
dis.py	17.71 KB	-rw-r--r--	2024-04-17 17:32
doctest.py	101.94 KB	-rw-r--r--	2024-04-17 17:32
dummy_threading.py	2.75 KB	-rw-r--r--	2024-04-17 17:32
enum.py	32.82 KB	-rw-r--r--	2024-04-17 17:32
filecmp.py	9.6 KB	-rw-r--r--	2024-04-17 17:32
fileinput.py	14.13 KB	-rw-r--r--	2024-04-17 17:32
fnmatch.py	3.09 KB	-rw-r--r--	2024-04-17 17:32
formatter.py	14.79 KB	-rw-r--r--	2024-04-17 17:32
fractions.py	23.08 KB	-rw-r--r--	2024-04-17 17:32
ftplib.py	34.78 KB	-rw-r--r--	2024-04-17 17:32
functools.py	30.61 KB	-rw-r--r--	2024-04-17 17:32
genericpath.py	4.64 KB	-rw-r--r--	2024-04-17 17:32
getopt.py	7.31 KB	-rw-r--r--	2024-04-17 17:32
getpass.py	5.85 KB	-rw-r--r--	2024-04-17 17:32
gettext.py	21.03 KB	-rw-r--r--	2024-04-17 17:32
glob.py	5.51 KB	-rw-r--r--	2024-04-17 17:32
gzip.py	19.86 KB	-rw-r--r--	2024-04-17 17:32
hashlib.py	9.31 KB	-rw-r--r--	2024-04-17 17:32
heapq.py	22.39 KB	-rw-r--r--	2024-04-17 17:32
hmac.py	4.94 KB	-rw-r--r--	2024-04-17 17:32
imaplib.py	52.05 KB	-rw-r--r--	2024-04-17 17:32
imghdr.py	3.71 KB	-rw-r--r--	2024-04-17 17:32
imp.py	10.42 KB	-rw-r--r--	2024-04-17 17:32
inspect.py	114.22 KB	-rw-r--r--	2024-04-17 17:32
io.py	3.43 KB	-rw-r--r--	2024-04-17 17:32
ipaddress.py	72.82 KB	-rw-r--r--	2024-04-17 17:32
keyword.py	2.17 KB	-rwxr-xr-x	2024-04-17 17:32
linecache.py	5.19 KB	-rw-r--r--	2024-04-17 17:32
locale.py	75.49 KB	-rw-r--r--	2024-04-17 17:32
lzma.py	12.68 KB	-rw-r--r--	2024-04-17 17:32
macpath.py	5.83 KB	-rw-r--r--	2024-04-17 17:32
macurl2path.py	2.67 KB	-rw-r--r--	2024-04-17 17:32
mailbox.py	76.78 KB	-rw-r--r--	2024-04-17 17:32
mailcap.py	7.91 KB	-rw-r--r--	2024-04-17 17:32
mimetypes.py	20.55 KB	-rw-r--r--	2024-04-17 17:32
modulefinder.py	22.49 KB	-rw-r--r--	2024-04-17 17:32
netrc.py	5.55 KB	-rw-r--r--	2024-04-17 17:32
nntplib.py	42.07 KB	-rw-r--r--	2024-04-17 17:32
ntpath.py	22.55 KB	-rw-r--r--	2024-04-17 17:32
nturl2path.py	2.39 KB	-rw-r--r--	2024-04-17 17:32
numbers.py	10 KB	-rw-r--r--	2024-04-17 17:32
opcode.py	5.69 KB	-rw-r--r--	2024-04-17 17:32
operator.py	10.61 KB	-rw-r--r--	2024-04-17 17:32
optparse.py	58.96 KB	-rw-r--r--	2024-04-17 17:32
os.py	36.65 KB	-rw-r--r--	2024-04-17 17:32
pathlib.py	47.83 KB	-rw-r--r--	2024-04-17 17:32
pdb.py	59.89 KB	-rwxr-xr-x	2024-04-17 17:32
pickle.py	54.39 KB	-rw-r--r--	2024-04-17 17:32
pickletools.py	89.62 KB	-rw-r--r--	2024-04-17 17:32
pipes.py	8.71 KB	-rw-r--r--	2024-04-17 17:32
pkgutil.py	20.82 KB	-rw-r--r--	2024-04-17 17:32
platform.py	46.1 KB	-rwxr-xr-x	2024-04-17 17:32
plistlib.py	32.02 KB	-rw-r--r--	2024-04-17 17:32
poplib.py	14.61 KB	-rw-r--r--	2024-04-17 17:32
posixpath.py	15.4 KB	-rw-r--r--	2024-04-17 17:32
pprint.py	20.37 KB	-rw-r--r--	2024-04-17 17:32
profile.py	21.52 KB	-rwxr-xr-x	2024-04-17 17:32
pstats.py	25.94 KB	-rw-r--r--	2024-04-17 17:32
pty.py	4.65 KB	-rw-r--r--	2024-04-17 17:32
py_compile.py	7.01 KB	-rw-r--r--	2024-04-17 17:32
pyclbr.py	13.24 KB	-rw-r--r--	2024-04-17 17:32
pydoc.py	101.08 KB	-rw-r--r--	2024-04-17 17:32
queue.py	8.57 KB	-rw-r--r--	2024-04-17 17:32
quopri.py	7.09 KB	-rwxr-xr-x	2024-04-17 17:32
random.py	26.8 KB	-rw-r--r--	2024-04-17 17:32
re.py	15.19 KB	-rw-r--r--	2024-04-17 17:32
reprlib.py	5.21 KB	-rw-r--r--	2024-04-17 17:32
rlcompleter.py	6.93 KB	-rw-r--r--	2024-04-17 17:32
runpy.py	11.68 KB	-rw-r--r--	2024-04-17 17:32
sched.py	6.36 KB	-rw-r--r--	2024-04-17 17:32
secrets.py	1.99 KB	-rw-r--r--	2024-04-17 17:32
selectors.py	18.98 KB	-rw-r--r--	2024-04-17 17:32
shelve.py	8.32 KB	-rw-r--r--	2024-04-17 17:32
shlex.py	12.65 KB	-rw-r--r--	2024-04-17 17:32
shutil.py	39.59 KB	-rw-r--r--	2024-04-17 17:32
signal.py	2.07 KB	-rw-r--r--	2024-04-17 17:32
site.py	20.53 KB	-rw-r--r--	2024-04-17 17:32
smtpd.py	33.91 KB	-rwxr-xr-x	2024-04-17 17:32
smtplib.py	43.38 KB	-rwxr-xr-x	2024-04-17 17:32
sndhdr.py	6.92 KB	-rw-r--r--	2024-04-17 17:32
socket.py	26.8 KB	-rw-r--r--	2024-04-17 17:32
socketserver.py	26.38 KB	-rw-r--r--	2024-04-17 17:32
sre_compile.py	18.88 KB	-rw-r--r--	2024-04-17 17:32
sre_constants.py	6.66 KB	-rw-r--r--	2024-04-17 17:32
sre_parse.py	35.68 KB	-rw-r--r--	2024-04-17 17:32
ssl.py	43.74 KB	-rw-r--r--	2024-04-17 17:32
stat.py	4.92 KB	-rw-r--r--	2024-04-17 17:32
statistics.py	20.19 KB	-rw-r--r--	2024-04-17 17:32
string.py	11.52 KB	-rw-r--r--	2024-04-17 17:32
stringprep.py	12.61 KB	-rw-r--r--	2024-04-17 17:32
struct.py	257 B	-rw-r--r--	2024-04-17 17:32
subprocess.py	60.88 KB	-rw-r--r--	2024-04-17 17:32
sunau.py	17.67 KB	-rw-r--r--	2024-04-17 17:32
symbol.py	2.07 KB	-rwxr-xr-x	2024-04-17 17:32
symtable.py	7.11 KB	-rw-r--r--	2024-04-17 17:32
sysconfig.py	24.4 KB	-rw-r--r--	2024-04-17 17:32
tabnanny.py	11.15 KB	-rwxr-xr-x	2024-04-17 17:32
tarfile.py	91.13 KB	-rwxr-xr-x	2024-04-17 17:32
telnetlib.py	22.59 KB	-rw-r--r--	2024-04-17 17:32
tempfile.py	26.15 KB	-rw-r--r--	2024-04-17 17:32
textwrap.py	19.1 KB	-rw-r--r--	2024-04-17 17:32
this.py	1003 B	-rw-r--r--	2024-04-17 17:32
threading.py	47.88 KB	-rw-r--r--	2024-04-17 17:32
timeit.py	13.03 KB	-rwxr-xr-x	2024-04-17 17:32
token.py	3 KB	-rw-r--r--	2024-04-17 17:32
tokenize.py	28.8 KB	-rw-r--r--	2024-04-17 17:32
trace.py	28.06 KB	-rwxr-xr-x	2024-04-17 17:32
traceback.py	22.91 KB	-rw-r--r--	2024-04-17 17:32
tracemalloc.py	16.27 KB	-rw-r--r--	2024-04-17 17:32
tty.py	879 B	-rw-r--r--	2024-04-17 17:32
types.py	8.66 KB	-rw-r--r--	2024-04-17 17:32
typing.py	78.39 KB	-rw-r--r--	2024-04-17 17:32
uu.py	6.75 KB	-rwxr-xr-x	2024-04-17 17:32
uuid.py	23.41 KB	-rw-r--r--	2024-04-17 17:32
warnings.py	18.05 KB	-rw-r--r--	2024-04-17 17:32
wave.py	17.29 KB	-rw-r--r--	2024-04-17 17:32
weakref.py	19.99 KB	-rw-r--r--	2024-04-17 17:32
webbrowser.py	21.26 KB	-rwxr-xr-x	2024-04-17 17:32
xdrlib.py	5.77 KB	-rw-r--r--	2024-04-17 17:32
zipapp.py	6.99 KB	-rw-r--r--	2024-04-17 17:32
zipfile.py	74.49 KB	-rw-r--r--	2024-04-17 17:32

Rename

"""Conversion functions between RGB and other color systems.

This modules provides two functions for each color system ABC:

rgb_to_abc(r, g, b) --> a, b, c
  abc_to_rgb(a, b, c) --> r, g, b

All inputs and outputs are triples of floats in the range [0.0...1.0]
(with the exception of I and Q, which covers a slightly larger range).
Inputs outside the valid range may cause exceptions or invalid outputs.

Supported color systems:
RGB: Red, Green, Blue components
YIQ: Luminance, Chrominance (used by composite video signals)
HLS: Hue, Luminance, Saturation
HSV: Hue, Saturation, Value
"""

# References:
# http://en.wikipedia.org/wiki/YIQ
# http://en.wikipedia.org/wiki/HLS_color_space
# http://en.wikipedia.org/wiki/HSV_color_space

__all__ = ["rgb_to_yiq","yiq_to_rgb","rgb_to_hls","hls_to_rgb",
           "rgb_to_hsv","hsv_to_rgb"]

# Some floating point constants

ONE_THIRD = 1.0/3.0
ONE_SIXTH = 1.0/6.0
TWO_THIRD = 2.0/3.0

# YIQ: used by composite video signals (linear combinations of RGB)
# Y: perceived grey level (0.0 == black, 1.0 == white)
# I, Q: color components
#
# There are a great many versions of the constants used in these formulae.
# The ones in this library uses constants from the FCC version of NTSC.

def rgb_to_yiq(r, g, b):
    y = 0.30*r + 0.59*g + 0.11*b
    i = 0.74*(r-y) - 0.27*(b-y)
    q = 0.48*(r-y) + 0.41*(b-y)
    return (y, i, q)

def yiq_to_rgb(y, i, q):
    # r = y + (0.27*q + 0.41*i) / (0.74*0.41 + 0.27*0.48)
    # b = y + (0.74*q - 0.48*i) / (0.74*0.41 + 0.27*0.48)
    # g = y - (0.30*(r-y) + 0.11*(b-y)) / 0.59

r = y + 0.9468822170900693*i + 0.6235565819861433*q
    g = y - 0.27478764629897834*i - 0.6356910791873801*q
    b = y - 1.1085450346420322*i + 1.7090069284064666*q

if r < 0.0:
        r = 0.0
    if g < 0.0:
        g = 0.0
    if b < 0.0:
        b = 0.0
    if r > 1.0:
        r = 1.0
    if g > 1.0:
        g = 1.0
    if b > 1.0:
        b = 1.0
    return (r, g, b)

# HLS: Hue, Luminance, Saturation
# H: position in the spectrum
# L: color lightness
# S: color saturation

def rgb_to_hls(r, g, b):
    maxc = max(r, g, b)
    minc = min(r, g, b)
    # XXX Can optimize (maxc+minc) and (maxc-minc)
    l = (minc+maxc)/2.0
    if minc == maxc:
        return 0.0, l, 0.0
    if l <= 0.5:
        s = (maxc-minc) / (maxc+minc)
    else:
        s = (maxc-minc) / (2.0-maxc-minc)
    rc = (maxc-r) / (maxc-minc)
    gc = (maxc-g) / (maxc-minc)
    bc = (maxc-b) / (maxc-minc)
    if r == maxc:
        h = bc-gc
    elif g == maxc:
        h = 2.0+rc-bc
    else:
        h = 4.0+gc-rc
    h = (h/6.0) % 1.0
    return h, l, s

def hls_to_rgb(h, l, s):
    if s == 0.0:
        return l, l, l
    if l <= 0.5:
        m2 = l * (1.0+s)
    else:
        m2 = l+s-(l*s)
    m1 = 2.0*l - m2
    return (_v(m1, m2, h+ONE_THIRD), _v(m1, m2, h), _v(m1, m2, h-ONE_THIRD))

def _v(m1, m2, hue):
    hue = hue % 1.0
    if hue < ONE_SIXTH:
        return m1 + (m2-m1)*hue*6.0
    if hue < 0.5:
        return m2
    if hue < TWO_THIRD:
        return m1 + (m2-m1)*(TWO_THIRD-hue)*6.0
    return m1

# HSV: Hue, Saturation, Value
# H: position in the spectrum
# S: color saturation ("purity")
# V: color brightness

def rgb_to_hsv(r, g, b):
    maxc = max(r, g, b)
    minc = min(r, g, b)
    v = maxc
    if minc == maxc:
        return 0.0, 0.0, v
    s = (maxc-minc) / maxc
    rc = (maxc-r) / (maxc-minc)
    gc = (maxc-g) / (maxc-minc)
    bc = (maxc-b) / (maxc-minc)
    if r == maxc:
        h = bc-gc
    elif g == maxc:
        h = 2.0+rc-bc
    else:
        h = 4.0+gc-rc
    h = (h/6.0) % 1.0
    return h, s, v

def hsv_to_rgb(h, s, v):
    if s == 0.0:
        return v, v, v
    i = int(h*6.0) # XXX assume int() truncates!
    f = (h*6.0) - i
    p = v*(1.0 - s)
    q = v*(1.0 - s*f)
    t = v*(1.0 - s*(1.0-f))
    i = i%6
    if i == 0:
        return v, t, p
    if i == 1:
        return q, v, p
    if i == 2:
        return p, v, t
    if i == 3:
        return p, q, v
    if i == 4:
        return t, p, v
    if i == 5:
        return v, p, q
    # Cannot get here