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-rw-r--r--src/curve.py14
1 files changed, 14 insertions, 0 deletions
diff --git a/src/curve.py b/src/curve.py
index 8a6b28c..34adf29 100644
--- a/src/curve.py
+++ b/src/curve.py
@@ -263,6 +263,20 @@ def gamma(r, g, b):
curve[i] **= level
+def negative(r, g, b):
+ '''
+ Invert the colour curves (negative image)
+
+ @param r:bool Whether to invert the red curve
+ @param g:bool Whether to invert the green curve
+ @param b:bool Whether to invert the blue curve
+ '''
+ for (curve, setting) in curves(r, g, b):
+ if setting:
+ for i in range(i_size):
+ curve[i] = 1 - curve[i]
+
+
def sigmoid(r, g, b):
'''
Apply S-curve correction on the colour curves