pillow包
pillow：（了解）（python image library）是一个有关图像图片处理的包，这个包底层用的C C++,但PIL包是python2下使用。所以又更新了一个适合python3版本的、基于PIL包的新包pillow。
安装pillow：
(cmd) pip install pillow
引入：from PIL import Image, ImageFilter
image_path = Image.open('img.jpg')
# image_path = Image.open('图片相对路径')
print(image_path.size)
width, height = image_path.size
print(width, height)
1.缩放 thumbnail
image_path.thumbnail((800,600))
两个参数，第一个参数是宽，第二个参数是高
2.保存为新图片 save
image_path.save('img', 'jpeg')
# image_path.save('文件名', '保存文件格式（如：jpeg）')
3.旋转 rotate
image_rotate = image_path.rotate(90)
image_rotate.show()
# 打开文件，用于临时打开
4.滤镜
ImageFilter（滤镜）
GaussianBlur高斯模糊
Color3DLUT颜色三地
BLUR默认颜色
image_ImageFilter = image_path1.filter(ImageFilter.BLUR)
image_ImageFilter.show()
image_path1.save('demo3.jpg','jpeg')
随机生成验证码
(了解）RGB：red green blue 色光三原色，(11,225,5)
引入：
from PIL import Image, ImageDraw, ImageFont, ImageFilter
import random
1.随机字母
def random_char():
return chr(random.randint(65, 90))
2.随机数字
def random_num():
return random.randint(0,9)
3.随机字体颜色
def random_color():
return (random.randint(150,255),random.randint(150,255),random.randint(150,255))
4.随机背景颜色
def random_color2():
return (random.randint(30, 120), random.randint(30, 120), random.randint(30, 120))
5.生成空白背景图层
image = Image.new('RGB', size=(240, 60), color=(255, 255, 255))
6.生成绘制对象
draw = ImageDraw.Draw(image)
7.字体对象 ，字体、字号
font = ImageFont.truetype('arial.ttf', 36)
8.循环像素点并填充颜色
for x in range(0, 240):
for y in range(0, 60):
draw.point(xy=(x, y), fill=random_color2())
9.生成文字
for t in range(0, 4):
draw.text((60*t+20, 10), random_char(), font=font, fill=random_color())
10.加模糊滤镜
image = image.filter(ImageFilter.BLUR)
11.保存
image.save('demo4.jpg', 'jpeg')
画点完整代码：
from PIL import Image, ImageDraw, ImageFont, ImageFilter
import random
class Picture(object):
def __init__(self, text_str, size, background):
'''
text_str: 验证码显示的字符组成的字符串
size: 图片大小
background: 背景颜色
'''
self.text_list = list(text_str)
self.size = size
self.background = background
def create_pic(self):
'''
创建一张图片
'''
self.width, self.height = self.size
self.img = Image.new("RGB", self.size, self.background)
# 实例化画笔
self.draw = ImageDraw.Draw(self.img)
def create_point(self, num, color):
'''
num: 画点的数量
color: 点的颜色
功能：画点
'''
for i in range(num):
self.draw.point(
(random.randint(0, self.width), random.randint(0, self.height)),
fill=color
)
def create_line(self, num, color):
'''
num: 线条的数量
color: 线条的颜色
功能：画线条
'''
for i in range(num):
self.draw.line(
[
(random.randint(0, self.width), random.randint(0, self.height)),
(random.randint(0, self.width), random.randint(0, self.height))
],
fill=color
)
def create_text(self, font_type, font_size, font_color, font_num, start_xy):
'''
font_type: 字体
font_size: 文字大小
font_color: 文字颜色
font_num: 文字数量
start_xy: 第一个字左上角坐标,元组类型，如 (5,5)
功能： 画文字
'''
font = ImageFont.truetype(font_type, font_size)
self.draw.text(start_xy, " ".join(random.sample(self.text_list, font_num)), font=font, fill=font_color)
def opera(self):
'''
功能：给画出来的线条，文字，扭曲一下，缩放一下，位移一下，滤镜一下。
就是让它看起来有点歪，有点扭。
'''
params = [
1 - float(random.randint(1, 2)) / 100,
0,
0,
0,
1 - float(random.randint(1, 10)) / 100,
float(random.randint(1, 2)) / 500,
0.001,
float(random.randint(1, 2)) / 500
]
self.img = self.img.transform(self.size, Image.PERSPECTIVE, params)
self.img = self.img.filter(ImageFilter.EDGE_ENHANCE_MORE)
if __name__ == "__main__":
strings = "abcdefghjkmnpqrstwxyz23456789ABCDEFGHJKLMNPQRSTWXYZ"
size = (150, 50)
background = 'white'
pic = Picture(strings, size, background)
pic.create_pic()
pic.create_point(500, (220, 220, 220))
pic.create_line(30, (220, 220, 220))
pic.create_text("simsun.ttc", 24, (0, 0, 205), 5, (7, 7))
pic.opera()
pic.img.show()
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