def warmup(image, midtone, brighten, amount=100):
"""Apply a toning filter. Move the midtones to the desired
color while preserving blacks and whites with optional mixing
with original image - amount: 0-100%"""
mode = image.mode
info = image.info
if image.mode != "L":
im = imtools.convert(image, "L")
else:
im = image
if image.mode != "RGBA" and imtools.has_transparency(image):
image = imtools.convert(image, "RGBA")
luma = imtools.convert(imtools.split(im)[0], "F")
o = []
m = ImageColor.getrgb(midtone)
b = brighten / 600.0
# Calculate channels separately
for l in range(3):
o.append(ImageMath.eval("m*(255-i)*i+i", i=luma, m=4 * ((m[l] / 255.0) - 0.5 + b) / 255.0).convert("L"))
colorized = Image.merge("RGB", tuple(o))
if imtools.has_alpha(image):
imtools.put_alpha(colorized, imtools.get_alpha(image))
if amount < 100:
colorized = imtools.blend(image, colorized, amount / 100.0)
return colorized
def posterize(image, bits, amount=100):
"""Apply a filter
- amount: 0-1"""
image = imtools.convert_safe_mode(image)
posterized = imtools.remove_alpha(image)
posterized = ImageOps.posterize(posterized, bits)
if imtools.has_alpha(image):
imtools.put_alpha(posterized, imtools.get_alpha(image))
if amount < 100:
return imtools.blend(image, posterized, amount / 100.0)
return posterized
def solarize(image, treshold, amount=100):
"""Apply a filter
- amount: 0-1"""
image = imtools.convert_safe_mode(image)
solarized = image.convert('RGB')
solarized = ImageOps.solarize(solarized, treshold)
if imtools.has_alpha(image):
imtools.put_alpha(solarized, imtools.get_alpha(image))
if amount < 100:
return imtools.blend(image, solarized, amount / 100.0)
return solarized
def solarize(image, treshold, amount=100):
"""Apply a filter
- amount: 0-1"""
image = imtools.convert_safe_mode(image)
solarized = image.convert('RGB')
solarized = ImageOps.solarize(solarized, treshold)
if imtools.has_alpha(image):
imtools.put_alpha(solarized, imtools.get_alpha(image))
if amount < 100:
return imtools.blend(image, solarized, amount / 100.0)
return solarized
def posterize(image, bits, amount=100):
"""Apply a filter
- amount: 0-1"""
image = imtools.convert_safe_mode(image)
posterized = imtools.remove_alpha(image)
posterized = ImageOps.posterize(posterized, bits)
if imtools.has_alpha(image):
imtools.put_alpha(posterized, imtools.get_alpha(image))
if amount < 100:
return imtools.blend(image, posterized, amount / 100.0)
return posterized
def equalize(image, amount=100):
image = imtools.convert_safe_mode(image)
if imtools.has_alpha(image):
equalized = imtools.remove_alpha(image)
else:
equalized = image
equalized = ImageOps.equalize(equalized)
if imtools.has_alpha(image):
imtools.put_alpha(equalized, imtools.get_alpha(image))
if amount < 100:
equalized = imtools.blend(image, equalized, amount / 100.0)
return equalized
def equalize(image, amount=100):
image = imtools.convert_safe_mode(image)
if imtools.has_alpha(image):
equalized = imtools.remove_alpha(image)
else:
equalized = image
equalized = ImageOps.equalize(equalized)
if imtools.has_alpha(image):
imtools.put_alpha(equalized, imtools.get_alpha(image))
if amount < 100:
equalized = imtools.blend(image, equalized, amount / 100.0)
return equalized
def autocontrast(image, amount=100.0, cutoff=0):
"""Apply a filter
- amount: 0-1
- repeat: how many times it should be repeated"""
image = imtools.convert_safe_mode(image)
if imtools.has_transparency(image):
im = imtools.remove_alpha(image)
else:
im = image
contrasted = ImageOps.autocontrast(im, cutoff)
if imtools.has_transparency(image):
imtools.put_alpha(contrasted, imtools.get_alpha(image))
if amount < 100:
return imtools.blend(image, contrasted, amount / 100.0)
return contrasted
def autocontrast(image, amount=100.0, cutoff=0):
"""Apply a filter
- amount: 0-1
- repeat: how many times it should be repeated"""
image = imtools.convert_safe_mode(image)
if imtools.has_transparency(image):
im = imtools.remove_alpha(image)
else:
im = image
contrasted = ImageOps.autocontrast(im, cutoff)
if imtools.has_transparency(image):
imtools.put_alpha(contrasted, imtools.get_alpha(image))
if amount < 100:
return imtools.blend(image, contrasted, amount / 100.0)
return contrasted
def warmup(image, midtone, brighten, amount=100):
"""Apply a toning filter. Move the midtones to the desired
color while preserving blacks and whites with optional mixing
with original image - amount: 0-100%"""
mode = image.mode
info = image.info
if image.mode != 'L':
im = imtools.convert(image, 'L')
else:
im = image
if image.mode != 'RGBA' and imtools.has_transparency(image):
image = imtools.convert(image, 'RGBA')
luma = imtools.convert(imtools.split(im)[0], 'F')
o = []
m = ImageColor.getrgb(midtone)
b = brighten / 600.0
# Calculate channels separately
for l in range(3):
o.append(
ImageMath.eval("m*(255-i)*i+i",
i=luma,
m=4 * ((m[l] / 255.0) - 0.5 + b) /
255.0).convert('L'))
colorized = Image.merge('RGB', tuple(o))
if imtools.has_alpha(image):
imtools.put_alpha(colorized, imtools.get_alpha(image))
if amount < 100:
colorized = imtools.blend(image, colorized, amount / 100.0)
return colorized