def brightness(image, amount=50):
"""Adjust brightness from black to white
- amount: -1(black) 0 (unchanged) 1(white)
- repeat: how many times it should be repeated"""
if amount == 0:
return image
image = imtools.convert_safe_mode(image)
if amount < 0:
#fade to black
im = imtools.blend(
image,
Image.new(image.mode, image.size, 0),
-amount / 100.0)
else:
#fade to white
im = imtools.blend(
image,
Image.new(image.mode, image.size,
ImageColor.getcolor('white', image.mode)),
amount / 100.0)
#fix image transparency mask
if imtools.has_alpha(image):
im.putalpha(imtools.get_alpha(image))
return im
def grayscale(image, amount=100):
grayscaled = ImageOps.grayscale(image)
if amount < 100:
grayscaled = imtools.blend(image, grayscaled, amount / 100.0)
if image.mode == "RGBA":
grayscaled.putalpha(imtools.get_alpha(image))
return grayscaled
def grayscale(image, amount=100):
grayscaled = ImageOps.grayscale(image)
if amount < 100:
grayscaled = imtools.blend(image, grayscaled, amount / 100.0)
if image.mode == 'RGBA':
grayscaled.putalpha(imtools.get_alpha(image))
return grayscaled
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 median(image, radius, amount=100):
"""Apply a filter
- amount: 0-1"""
image = imtools.convert_safe_mode(image)
medianed = image.filter(ImageFilter.MedianFilter(radius))
if amount < 100:
return imtools.blend(image, medianed, amount / 100.0)
return medianed
def invert(image, amount=100):
image = imtools.convert_safe_mode(image)
inverted = ImageChops.invert(image)
if amount < 100:
inverted = imtools.blend(image, inverted, amount / 100.0)
if imtools.has_alpha(image):
inverted.putalpha(imtools.get_alpha(image))
return inverted
def maximum(image, radius, amount=100):
"""Apply a filter
- amount: 0-1"""
image = imtools.convert_safe_mode(image)
maximumed = image.filter(ImageFilter.MaxFilter(radius))
if amount < 100:
return imtools.blend(image, maximumed, amount / 100.0)
return maximumed
def common(image, radius, amount=100):
"""Apply a filter
- amount: 0-1"""
image = imtools.convert_safe_mode(image)
commoned = image.filter(ImageFilter.ModeFilter(radius))
if amount < 100:
return imtools.blend(image, commoned, amount / 100.0)
return commoned
def common(image, radius, amount=100):
"""Apply a filter
- amount: 0-1"""
image = imtools.convert_safe_mode(image)
commoned = image.filter(ImageFilter.ModeFilter(radius))
if amount < 100:
return imtools.blend(image, commoned, amount / 100.0)
return commoned
def rnk(image, radius, rank=50, amount=100):
"""Apply a filter
- amount: 0-1"""
rank /= 100.0
r = int((radius * radius - 1) * rank)
image = imtools.convert_safe_mode(image)
ranked = image.filter(ImageFilter.RankFilter(radius, r))
if amount < 100:
return imtools.blend(image, ranked, amount / 100)
return ranked
def rnk(image, radius, rank=50, amount=100):
"""Apply a filter
- amount: 0-1"""
rank /= 100.0
r = int((radius * radius - 1) * rank)
image = imtools.convert_safe_mode(image)
ranked = image.filter(ImageFilter.RankFilter(radius, r))
if amount < 100:
return imtools.blend(image, ranked, amount / 100)
return ranked
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 rotate(image, angle, resample_image, expand=0, amount=100,
background_color='#000000', background_opacity=100):
resample_image = getattr(Image, resample_image)
if background_opacity != 100 or background_color != '#000000':
image = image.convert('RGBA')
rotated = image.rotate(angle, resample_image, expand)
rgba = HTMLColorToRGBA(background_color,
255 * background_opacity / 100)
rotated = imtools.fill_background_color(rotated, rgba)
if amount < 100:
rotated = imtools.blend(image, rotated, amount / 100.0, rgba)
return rotated
def rotate(image, angle, resample_image, expand=0, amount=100,
background_color='#000000', background_opacity=100):
resample_image = getattr(Image, resample_image)
if background_opacity != 100 or background_color != '#000000':
image = image.convert('RGBA')
rotated = image.rotate(angle, resample_image, expand)
rgba = HTMLColorToRGBA(background_color,
255 * background_opacity / 100)
rotated = imtools.fill_background_color(rotated, rgba)
if amount < 100:
rotated = imtools.blend(image, rotated, amount / 100.0, rgba)
return rotated
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 saturation(image, amount=50):
"""Adjust brightness from black to white
- amount: -1(black) 0 (unchanged) 1(white)
- repeat: how many times it should be repeated"""
if amount == 0:
return image
amount /= 100.0
grey = image.convert("L").convert(image.mode)
if amount < 0:
#grayscale
im = imtools.blend(image, grey, -amount)
else:
#overcolored = Image - (alpha * Grey) / (1 - alpha)
alpha = 0.7
alpha_g = grey.point(lambda x: x * alpha)
i_minus_alpha_g = ImageChops.subtract(image, alpha_g)
overcolored = i_minus_alpha_g.point(lambda x: x / (1 - alpha))
im = imtools.blend(image, overcolored, amount)
#fix image transparency mask
if image.mode == 'RGBA':
im.putalpha(imtools.get_alpha(image))
return im
def saturation(image, amount=50):
"""Adjust brightness from black to white
- amount: -1(black) 0 (unchanged) 1(white)
- repeat: how many times it should be repeated"""
if amount == 0:
return image
amount /= 100.0
grey = image.convert("L").convert(image.mode)
if amount < 0:
#grayscale
im = imtools.blend(image, grey, -amount)
else:
#overcolored = Image - (alpha * Grey) / (1 - alpha)
alpha = 0.7
alpha_g = grey.point(lambda x: x * alpha)
i_minus_alpha_g = ImageChops.subtract(image, alpha_g)
overcolored = i_minus_alpha_g.point(lambda x: x / (1 - alpha))
im = imtools.blend(image, overcolored, amount)
#fix image transparency mask
if image.mode == 'RGBA':
im.putalpha(imtools.get_alpha(image))
return im
def contrast(image, amount=50):
"""Adjust brightness from black to white
- amount: -1(black) 0 (unchanged) 1(white)
- repeat: how many times it should be repeated"""
if amount == 0:
return image
elif amount < 0:
#low contrast
mean = reduce(lambda a, b: a + b,
image.convert("L").histogram()) / 256.0
im = imtools.blend(
image,
Image.new("L", image.size, mean).convert(image.mode),
-amount / 100.0)
else:
#high contrast
im = imtools.blend(image, image.point(lambda x: x > 128 and 255),
amount / 100.0)
#fix image transparency mask
if image.mode == 'RGBA':
im.putalpha(imtools.get_alpha(image))
return im
def colorize(image, black, white, amount=100):
"""Apply a filter
- amount: 0-1"""
if image.mode != 'L':
im = image.convert('L')
else:
im = image
colorized = ImageOps.colorize(im, black, white)
if image.mode == 'RGBA':
colorized = colorized.convert('RGBA')
colorized.putalpha(imtools.get_alpha(image))
if amount < 100:
return imtools.blend(image, colorized, amount / 100.0)
return colorized
def colorize(image, black, white, amount=100):
"""Apply a filter
- amount: 0-1"""
if image.mode != 'L':
im = image.convert('L')
else:
im = image
colorized = ImageOps.colorize(im, black, white)
if image.mode == 'RGBA':
colorized = colorized.convert('RGBA')
colorized.putalpha(imtools.get_alpha(image))
if amount < 100:
return imtools.blend(image, colorized, amount / 100.0)
return colorized
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 contrast(image, amount=50):
"""Adjust brightness from black to white
- amount: -1(black) 0 (unchanged) 1(white)
- repeat: how many times it should be repeated"""
if amount == 0:
return image
elif amount < 0:
#low contrast
mean = reduce(lambda a, b:
a + b, image.convert("L").histogram()) / 256.0
im = imtools.blend(
image,
Image.new("L", image.size, mean).convert(image.mode),
-amount / 100.0)
else:
#high contrast
im = imtools.blend(
image,
image.point(lambda x: x > 128 and 255),
amount / 100.0)
#fix image transparency mask
if image.mode == 'RGBA':
im.putalpha(imtools.get_alpha(image))
return im
def brightness(image, amount=50):
"""Adjust brightness from black to white
- amount: -1(black) 0 (unchanged) 1(white)
- repeat: how many times it should be repeated"""
if amount == 0:
return image
image = imtools.convert_safe_mode(image)
if amount < 0:
#fade to black
im = imtools.blend(image, Image.new(image.mode, image.size, 0),
-amount / 100.0)
else:
#fade to white
im = imtools.blend(
image,
Image.new(image.mode, image.size,
ImageColor.getcolor('white', image.mode)),
amount / 100.0)
#fix image transparency mask
if imtools.has_alpha(image):
im.putalpha(imtools.get_alpha(image))
return im
def effect(image, filter, amount=100, repeat=1):
"""Apply a filter
- amount: 0-1
- repeat: how many times it should be repeated"""
filter = getattr(ImageFilter, filter)
image = imtools.convert_safe_mode(image)
for i in range(repeat):
filtered = image.filter(filter)
if imtools.has_alpha(image) and \
filter in [ImageFilter.CONTOUR, ImageFilter.EMBOSS]:
filtered.putalpha(imtools.get_alpha(image))
if amount < 100:
image = imtools.blend(image, filtered, amount / 100.0)
else:
image = filtered
return image
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 transpose(image, method, amount=100):
transposed = image.transpose(getattr(Image, method))
if amount < 100:
transposed = imtools.blend(image, transposed, amount / 100.0)
return transposed
def transpose(image, method, amount=100):
transposed = image.transpose(getattr(Image, method))
if amount < 100:
transposed = imtools.blend(image, transposed, amount / 100.0)
return transposed