color_setGammaRGB.py
2.89 KB
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title = "SetGammaRGB"
tip = "applies gamma correction to colorbar"
onein = True
import numpy as np
import guiqwt.colormap as cm
from guidata.qt.QtGui import QMessageBox
from guidata.dataset.datatypes import DataSet
from guidata.dataset.dataitems import (IntItem, StringItem, ChoiceItem, FloatItem, BoolItem)
#from guiqwt.colormap import get_colormap_list, get_cmap, register_extra_colormap
from guiqwt.config import _
from guiqwt.transitional import QwtLinearColorMap, QwtDoubleInterval
FULLRANGE = QwtDoubleInterval(0.0, 1.0)
def nint(x):
if x > 0: return int(x+0.5)
else: return int(x-0.5)
class NOD3_App:
def __init__(self, parent):
self.parent = parent
self.parent.activateWindow()
def Error(self, msg):
QMessageBox.critical(self.parent.parent(), title,
_(u"Error:")+"\n%s" % str(msg))
def compute_app(self, **args):
class FuncParam(DataSet):
gammaR = FloatItem('Gamma(red)', default=1.0, min=0.001, max=10.0)
gammaG = FloatItem('Gamma(green)', default=1.0, min=0.001, max=10.0)
gammaB = FloatItem('Gamma(blue)', default=1.0, min=0.001, max=10.0)
name = title.replace(" ", "")
if args == {}:
param = FuncParam(_(title), "Set gamma correction to colormap:")
else:
param = self.parent.ScriptParameter(name, args)
# if no parameter needed set param to None. activate next line
#param = None
self.parent.compute_11(name, lambda m, p: self.function(m, p), param, onein)
def Gamma(self, a, p, f=255.0):
gammaR = 1.0/p.gammaR
gammaG = 1.0/p.gammaG
gammaB = 1.0/p.gammaB
y = hex(a)[2:-1]
x = [ord(c) for c in y.decode('hex')]
r = (float(x[1])/f)**gammaR
g = (float(x[2])/f)**gammaG
b = (float(x[3])/f)**gammaB
return r, g, b
def setup_color_map(self, p, f=255.0):
cmap_name = self.parent.cmap
#table = cm.get_cmap(cmap_name)
#cmap = table.colorTable(FULLRANGE)
item = self.parent.items[self.parent.row]
cmap = item.get_color_map().colorTable(FULLRANGE)
lut = {'red': [], 'green': [], 'blue': []}
for i in range(len(cmap)):
r, g, b = self.Gamma(cmap[i], p)
lut['red'].append((float(i)/f, r, r))
lut['green'].append((float(i)/f, g, g))
lut['blue'].append((float(i)/f, b, b))
return lut
def function(self, m, p):
cmdata = self.setup_color_map(p)
my_cmap = QwtLinearColorMap()
cname = self.parent.cmap + "_gammaRGB"
cm._setup_colormap(my_cmap, cmdata)
cm.register_extra_colormap(cname, my_cmap)
item = self.parent.items[self.parent.row]
item.set_color_map(cname)
plot = item.plot()
if plot:
#plot.update_colormap_axis(cm.get_cmap(cname))
plot.replot()
return [], p