python创建缩略图和选择轮廓效果

# -*- encoding:utf-8 -*-
''' 改变颜色 --- 颜色反转'''
from PIL import Image
nest = Image.open("D:\tk.jpg")
r,g,b = nest.split()           #获取原图的RGB通道的颜色值
newb = b.point(lambda i:i*1.1) #将B通道的颜色值增强
nest1 = Image.merge(nest.mode,(b,g,r))
nest1.thumbnail((400,254))     #创建缩略图
nest1.save("D:\nest_2.jpg")

选择轮廓效果

# -*- encoding:utf-8 -*-
''' 轮廓效果 --- 素描 '''
from PIL import Image
from PIL import ImageFilter
square = Image.open("D:\tk.jpg")
square1 = square.filter(ImageFilter.CONTOUR)  #选择轮廓效果
边缘强化

square1=square.convert('RGB').filter(ImageFilter.EDGE_ENHANCE)

#ImageFilter.EMBOSS 浮雕

square1.save("D:\square0.jpg")

平滑

im.convert('RGB').filter(ImageFilter.SMOOTH)

锐化

im.convert('RGB').filter(ImageFilter.SHARPEN)

锐化遮罩

im.convert('RGB').filter(ImageFilter.UnsharpMask(radius=2, percent=150, threshold=3))