from PIL import Image
def negative(img):
"""Invert colors of image.
:param img: image
:return: PIL object"""
data = list(img.getdata())
data_m = list()
for pixel in data:
red = 255 - pixel[0]
green = 255 - pixel[1]
blue = 255 - pixel[2]
data_m.append((red, green, blue))
img_m = Image.new(img.mode, img.size)
img_m.putdata(data_m)
return img_m
def red(img):
data = list(img.getdata())
data_m = list()
for pixel in data:
data_m.append((pixel[0], 0, 0))
img_m = Image.new(img.mode, img.size)
img_m.putdata(data_m)
return img_m
def green(img):
data = list(img.getdata())
data_m = list()
for pixel in data:
data_m.append((0, pixel[1], 0))
img_m = Image.new(img.mode, img.size)
img_m.putdata(data_m)
return img_m
def blue(img):
data = list(img.getdata())
data_m = list()
for pixel in data:
data_m.append((0, 0, pixel[2]))
img_m = Image.new(img.mode, img.size)
img_m.putdata(data_m)
return img_m
def grayscale(img):
data = list(img.getdata())
data_m = list()
for pixel in data:
gray = (pixel[0] + pixel[1] + pixel[2]) // 3
data_m.append((gray, gray, gray))
img_m = Image.new(img.mode, img.size)
img_m.putdata(data_m)
return img_m
def black_white(img, limit):
data = list(img.getdata())
data_m = list()
for pixel in data:
gray = (pixel[0] + pixel[1] + pixel[2]) // 3
gray = 0 if gray < limit else 255
data_m.append((gray, gray, gray))
img_m = Image.new(img.mode, img.size)
img_m.putdata(data_m)
return img_m
def brightness(img, value):
data = list(img.getdata())
data_m = list()
for pixel in data:
data_m.append((pixel[0]+value, pixel[1]+value, pixel[2]+value))
img_m = Image.new(img.mode, img.size)
img_m.putdata(data_m)
return img_m
def rotate(img, angle):
return img.rotate(angle, expand=True)
def horizontal_mirror(img):
return img.transpose(Image.FLIP_LEFT_RIGHT)
def vertical_mirror(img):
return img.transpose(Image.FLIP_TOP_BOTTOM)
