diff options
Diffstat (limited to '')
| -rw-r--r-- | src/curve.py | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/src/curve.py b/src/curve.py index 3435124..d3e2a2d 100644 --- a/src/curve.py +++ b/src/curve.py @@ -34,12 +34,14 @@ b_curve = [i / (i_size - 1) for i in range(i_size)] + clip_result = True ''' Set to `False` if you want to allow value overflow rather than clipping, doing so can create visual artifacts ''' + def curves(r, g, b): ''' Generate a tuple of curve–parameter pairs @@ -52,6 +54,7 @@ def curves(r, g, b): return ((r_curve, r), (g_curve, g), (b_curve, b)) + def series_d(temperature): ''' Calculate the colour for a blackbody temperature @@ -68,6 +71,7 @@ def series_d(temperature): y = 2.870 * x - 3.000 * x ** 2 - 0.275 return ciexy_to_srgb(x, y, 1.0) + def simple_whitepoint(temperature): ''' Calculate the colour for a blackbody temperature using a simple, but inaccurate, algorithm @@ -89,6 +93,7 @@ def simple_whitepoint(temperature): b = 0.543206789 * math.log(temp - 10) - 1.196254089 return (r, g, b) + cmf_2deg_cache = None def cmf_2deg(temperature): ''' @@ -115,6 +120,7 @@ def cmf_2deg(temperature): y = y1 * temp + y2 * (1 - temp) return ciexy_to_srgb(x, y, 1.0) + cmf_10deg_cache = None def cmf_10deg(temperature): ''' @@ -142,6 +148,7 @@ def cmf_10deg(temperature): return ciexy_to_srgb(x, y, 1.0) + def temperature(temperature, algorithm, linear_rgb = True): ''' Change colour temperature according to the CIE illuminant series D @@ -167,6 +174,7 @@ def temperature(temperature, algorithm, linear_rgb = True): (R, G, B) = linear_to_standard(R, G, B) r_curve[i], g_curve[i], b_curve[i] = R, G, B + def divide_by_maximum(): ''' Divide all colour components by the value of the most prominent colour component for each colour @@ -177,6 +185,7 @@ def divide_by_maximum(): for curve in (r_curve, g_curve, b_curve): curve[i] /= m + def rgb_contrast(r, g, b): ''' Apply contrast correction on the colour curves using sRGB @@ -190,6 +199,7 @@ def rgb_contrast(r, g, b): for i in range(i_size): curve[i] = (curve[i] - 0.5) * level + 0.5 + def cie_contrast(level): ''' Apply contrast correction on the colour curves using CIE XYZ @@ -201,6 +211,7 @@ def cie_contrast(level): (x, y, Y) = srgb_to_ciexyy(r_curve[i], g_curve[i], b_curve[i]) (r_curve[i], g_curve[i], b_curve[i]) = to_rgb(x, y, (Y - 0.5) * level + 0.5) + def rgb_brightness(r, g, b): ''' Apply brightness correction on the colour curves using sRGB @@ -214,6 +225,7 @@ def rgb_brightness(r, g, b): for i in range(i_size): curve[i] *= level + def cie_brightness(level): ''' Apply brightness correction on the colour curves using CIE XYZ @@ -225,6 +237,7 @@ def cie_brightness(level): (x, y, Y) = srgb_to_ciexyy(r_curve[i], g_curve[i], b_curve[i]) (r_curve[i], g_curve[i], b_curve[i]) = to_rgb(x, y, Y * level) + def gamma(r, g, b): ''' Apply gamma correction on the colour curves @@ -237,6 +250,7 @@ def gamma(r, g, b): if not level == 1.0: for i in range(i_size): curve[i] **= level + def sigmoid(r, g, b): ''' @@ -254,6 +268,7 @@ def sigmoid(r, g, b): except: curve[i] = 0; + def clip(): ''' Clip all values below the actual minimum and above actual maximums |