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Implemented mising blending filters #103

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Implemented mising blending filters #103

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40945bb
Implemented mising blending filters
Shiwank19 Apr 17, 2019
4071dd4
fixed missing index in burn blending mode
Shiwank19 Apr 21, 2019
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95 changes: 87 additions & 8 deletions p5/core/image.py
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Original file line number Diff line number Diff line change
Expand Up @@ -438,6 +438,7 @@ def blend(self, other, mode):
other_img = other._img

# todo: implement missing filters -- abhikpal (2018-08-14)
#status :missing filters implemented -- Shiwank (2019-04-17)
if mode == 'blend':
self._img = ImageChops.composite(self._img, other_img, self._img)
elif mode == 'add':
Expand All @@ -447,25 +448,103 @@ def blend(self, other, mode):
elif mode == 'lightest':
self._img = ImageChops.lighter(self._img, other_img)
elif mode == 'darkest':
self._img = ImageChops.darker(self._img, other_img)
self._img = ImageChops.darker(self._img, other_img)
elif mode == 'difference':
raise NotImplementedError
self._img = ImageChops.difference(self._img, other_img)
#for treating alpha=255 images
for i in range(0,self.size[0]):
for j in range(0,self.size[1]):
self_pixel = self._img.getpixel((i,j))
self._img.putpixel((i,j), (self_pixel[0], self_pixel[1], self_pixel[2], 255))
elif mode == 'exclusion':
raise NotImplementedError
#formula used:
#Target+Blend-2*(Target)*(Blend) ,0<=Target,Blend<=1
for i in range(0, self.size[0]):
for j in range(0, self.size[1]):
self_pixel = list(self._img.getpixel((i,j)))
other_pixel = list(other_img.getpixel((i,j)))
for k in range(0,len(self_pixel)):
self_pixel[k] = self_pixel[k]/255
other_pixel[k] = other_pixel[k]/255
self_pixel[k] = int(((self_pixel[k]) + (other_pixel[k]) - 2 * (self_pixel[k]) * (other_pixel[k])) * 255)
#alternate formula
#self_pixel[k]=int((0.5-2*(0.5-self_pixel[k])*(0.5-other_pixel[k]))*255)
self._img.putpixel((i, j), (self_pixel[0], self_pixel[1], self_pixel[2], 255))
elif mode == 'multiply':
self._img = ImageChops.multiply(self._img, other_img)
elif mode == 'screen':
self._img = ImageChops.screen(self._img, other_img)
elif mode == 'overlay':
raise NotImplementedError
#formula used:
#(Target > 0.5)*(1-(1-2*(Target-0.5))*(1-Blend))+(Target <= 0.5) * ((2*Target) * Blend) ,0<=Target,Blend<=1

for i in range(0, self.size[0]):
for j in range(0, self.size[1]):
self_pixel = list(self._img.getpixel((i, j)))
other_pixel = list(other_img.getpixel((i, j)))
for k in range(0, len(self_pixel)):
self_pixel[k] = self_pixel[k] / 255
other_pixel[k] = other_pixel[k] / 255
self_pixel[k] = int(((self_pixel[k] > 0.5) * (1 - (1-2 * (self_pixel[k] - 0.5)) * (1 - other_pixel[k])) + (self_pixel[k] <= 0.5) * ((2*self_pixel[k]) * other_pixel[k])) * 255)
self._img.putpixel((i, j), (self_pixel[0], self_pixel[1], self_pixel[2], 255))
elif mode == 'hard_light':
raise NotImplementedError
#formula used:
#(Blend > 0.5)*(1-(1-Target)*(1-2*(Blend-0.5)))+(Blend <= 0.5) * (Target * (2*Blend)) ,0<=Target,Blend<=1

for i in range(0, self.size[0]):
for j in range(0, self.size[1]):
self_pixel = list(self._img.getpixel((i, j)))
other_pixel = list(other_img.getpixel((i, j)))
for k in range(0, len(self_pixel)):
self_pixel[k] = self_pixel[k] / 255
other_pixel[k] = other_pixel[k] / 255
self_pixel[k] = int(((other_pixel[k] > 0.5) * (1 - ( 1 - self_pixel[k]) * (1 - 2 * (other_pixel[k] - 0.5))) + (other_pixel[k] <= 0.5) * (self_pixel[k] * (2 * other_pixel[k]))) * 255)
self._img.putpixel((i, j), (self_pixel[0], self_pixel[1], self_pixel[2], 255))
elif mode == 'soft_light':
raise NotImplementedError
#formula used:
#(Blend > 0.5)*(1-(1-Target)*(1-(Blend-0.5)))+(Blend <= 0.5) * (Target * (Blend+0.5)) ,0<=Target,Blend<=1

for i in range(0, self.size[0]):
for j in range(0, self.size[1]):
self_pixel = list(self._img.getpixel((i, j)))
other_pixel = list(other_img.getpixel((i, j)))
for k in range(0, len(self_pixel)):
self_pixel[k] = self_pixel[k] / 255
other_pixel[k] = other_pixel[k] / 255
self_pixel[k] = int(((other_pixel[k] > 0.5) * (1 - (1-self_pixel[k]) * (1 - (other_pixel[k]-0.5))) + (other_pixel[k] <= 0.5) * (self_pixel[k] * (other_pixel[k]+0.5))) * 255)
self._img.putpixel((i,j),(self_pixel[0],self_pixel[1],self_pixel[2],255))
elif mode == 'dodge':
raise NotImplementedError
#formula used:
#Target / (1-Blend) , 0<=Blend,target<=1

for i in range(0, self.size[0]):
for j in range(0, self.size[1]):
self_pixel=list(self._img.getpixel((i, j)))
other_pixel=list(other_img.getpixel((i, j)))
for k in range(0, len(self_pixel)):
self_pixel[k] = self_pixel[k] / 255
other_pixel[k] = other_pixel[k] / 255
if(other_pixel[k] == 1):
self_pixel[k] = 255
else:
self_pixel[k] = int((self_pixel[k] / (1-other_pixel[k]))*255)
self._img.putpixel((i, j), (self_pixel[0], self_pixel[1], self_pixel[2], 255))
elif mode == 'burn':
raise NotImplementedError
#formula used:
#1 - (1-Target) / Blend , 0<=Blend,target<=1

for i in range(0, self.size[0]):
for j in range(0, self.size[1]):
self_pixel = list(self._img.getpixel((i, j)))
other_pixel = list(other_img.getpixel((i, j)))
for k in range(0, len(self_pixel)):
self_pixel[k] = self_pixel[k] / 255
other_pixel[k] = other_pixel[k] / 255
if(other_pixel[k] == 0):
self_pixel[k] = 255
else:
self_pixel[k] = int((1 - (1-self_pixel[k]) / other_pixel[k]) * 255)
self._img.putpixel((i, j), (self_pixel[0], self_pixel[1], self_pixel[2], 255))
else:
raise KeyError("'{}' blend mode not found".format(mdoe.upper()))

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