python 图形验证码的实现

python 图形验证码的实现

• 导入pil库和ramdom库

  from PIL import Image, ImageDraw, ImageFont, ImageFilter
  import random
  

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• 创建画布

image1 = Image.new('RGBA', (120,60), (255,255,255,100))

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• 创建一个画图对象

draw = ImageDraw.Draw(image1)

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• 声明随机颜色函数

  定义rand_color()为背景渲染的随机函数

  定义rand_num_color()为数字验证码中数字的随机颜色

  def rand_color():
  	return random.randint(100,255),random.randint(100,255),random.randint(0,255)
  def rand_num_color():
  	return random.randint(0,100),random.randint(0,155),random.randint(0,100)
  

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• 渲染背景

for x in range(0,121):
	for y in range(0,61):
		draw.point((x,y), rand_color())

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• 渲染文字

font1 = ImageFont.truetype('font/bb.ttf',25)

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• 随机生成数字

for x in range(4):
	y = random.randint(10,40)
	num = str(random.randint(0,9))
	draw.text((x*30,y),num, (rand_num_color()),font1)

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• 显示

image1.show()

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完整代码

from PIL import Image, ImageDraw, ImageFont, ImageFilter
import random
# 创建 空画布
image1 = Image.new('RGBA', (120,60), (255,255,255,100))

# 创建一个画画对象
draw = ImageDraw.Draw(image1)
def rand_color():
	return random.randint(100,255),random.randint(100,255),random.randint(0,255)
def rand_num_color():
	return random.randint(0,100),random.randint(0,155),random.randint(0,100)
# 渲染背景
for x in range(0,121):
	for y in range(0,61):
		draw.point((x,y), rand_color())
# 加一个渲染效果
# image1 = image1.filter(ImageFilter.BLUR)


# 渲染文字
font1 = ImageFont.truetype('font/bb.ttf',25)
# 随机生成数字
for x in range(4):
	y = random.randint(10,40)
	num = str(random.randint(0,9))
	draw.text((x*30,y),num, (rand_num_color()),font1)


# 显示保存
ima