From f1b23c7f56732d58e34ee5b2f1c179d191aa6b5c Mon Sep 17 00:00:00 2001 From: Mattias Andrée Date: Wed, 12 Feb 2014 23:13:19 +0100 Subject: doc MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Signed-off-by: Mattias Andrée --- src/__main__.py | 33 ++++++++++++++++++++++++++++++++- 1 file changed, 32 insertions(+), 1 deletion(-) (limited to 'src/__main__.py') diff --git a/src/__main__.py b/src/__main__.py index 257ed3e..50c8763 100755 --- a/src/__main__.py +++ b/src/__main__.py @@ -22,28 +22,60 @@ b_curve = [i / 255 for i in range(256)] def curves(r, g, b): + ''' + Generate a tuple of curve–parameter pairs + + @param r The red parameter + @param g The green parameter + @param b The blue parameter + @return ((r_curve, r), (g_curve, g), (b_curve, b)) + ''' return ((r_curve, r), (g_curve, g), (b_curve, b)) def contrast(r, g, b): + ''' + Apply contrast correction on the colour curves + + @param r:float The contrast parameter for the red curve + @param g:float The contrast parameter for the green curve + @param b:float The contrast parameter for the blue curve + ''' for (curve, level) in curves(r, g, b): if not level == 1.0: for i in range(256): curve[i] = (curve[i] - 0.5) * level + 0.5 def brightness(r, g, b): + ''' + Apply brightness correction on the colour curves + + @param r:float The brightness parameter for the red curve + @param g:float The brightness parameter for the green curve + @param b:float The brightness parameter for the blue curve + ''' for (curve, level) in curves(r, g, b): if not level == 1.0: for i in range(256): curve[i] *= level def gamma(r, g, b): + ''' + Apply gamma correction on the colour curves + + @param r:float The gamma parameter for the red curve + @param g:float The gamma parameter for the green curve + @param b:float The gamma parameter for the blue curve + ''' for (curve, level) in curves(r, g, b): if not level == 1.0: for i in range(256): curve[i] **= level def clip(): + ''' + Clip all values belowed the actual minimum and above actual maximums + ''' for curve in (r_curve, g_curve, b_curve): for i in range(256): curve[i] = min(max(0.0, curve[i]), 1.0) @@ -52,7 +84,6 @@ def clip(): contrast(1.0, 1.0, 1.0) brightness(1.0, 1.0, 1.0) gamma(1.0, 1.0, 1.0) -temperature(1.0, 1.0, 1.0) clip() -- cgit v1.2.3-70-g09d2