标签:图片格式 close line get 获取 rgb sel init 内存
from PIL import ImageDraw
from PIL import ImageFont
from PIL import Image
import random
class CheckCode:
def __init__(self, width=242, height=38, code_count=5, font_size=32, point_count=20, line_count=3,
img_format=‘png‘):
"""
可以生成一个经过降噪后的随机验证码的图片
:param width: 图片宽度 单位px
:param height: 图片高度 单位px
:param code_count: 验证码个数
:param font_size: 字体大小
:param point_count: 噪点个数
:param line_count: 划线个数
:param img_format: 图片格式
:return 生成的图片的bytes类型的data
"""
self.width = width
self.height = height
self.code_count = code_count
self.font_size = font_size
self.point_count = point_count
self.line_count = line_count
self.img_format = img_format
@staticmethod
def getRandomColor():
"""获取随机颜色(r,g,b)"""
return random.randint(0, 255), random.randint(0, 255), random.randint(0, 255)
@staticmethod
def getRandomStr():
"""获取一个随机字符串,每个字符的颜色也是随机的"""
random_num = str(random.randint(0, 9))
random_low_alpha = chr(random.randint(97, 122))
random_upper_alpha = chr(random.randint(65, 90))
random_char = random.choice([random_num, random_low_alpha, random_upper_alpha])
return random_char
def getValidCodeImg(self):
# 获取一个Image对象,参数分别是RGB模式。宽240,高38,随机颜色
image = Image.new(‘RGB‘, (self.width, self.height), (255, 255, 255))
# 获取一个画笔对象,将图片对象传过去
draw = ImageDraw.Draw(image)
# 获取一个font字体对象参数是ttf的字体文件的目录,以及字体的大小
font = ImageFont.truetype(random.choice(["static/font/GothamNights.ttf", "static/font/Amiable.ttf", "static/font/FrankfurterMediumStd.otf"]), size=self.font_size)
temp = []
for i in range(self.code_count):
# 获取随机字符
random_char = self.getRandomStr()
# 在图片上一次写入得到的随机字符串,参数是:定位,字符串,颜色,字体
draw.text((25 + i * 40, 4), random_char, self.getRandomColor(), font=font)
# 保存随机字符,以供验证用户输入的验证码是否正确时使用
temp.append(random_char)
valid_str = ‘‘.join(temp)
# 噪点噪线
# 划线
for i in range(self.line_count):
x1 = random.randint(0, self.width)
x2 = random.randint(0, self.width)
y1 = random.randint(0, self.height)
y2 = random.randint(0, self.height)
draw.line((x1, y1, x2, y2), fill=self.getRandomColor())
# 画点
for i in range(self.point_count):
draw.point([random.randint(0, self.width), random.randint(0, self.height)], fill=self.getRandomColor())
x = random.randint(0, self.width)
y = random.randint(0, self.height)
draw.arc((x, y, x + 4, y + 4), 0, 90, fill=self.getRandomColor())
# 在内存生成图片
from io import BytesIO
f = BytesIO()
image.save(f, self.img_format)
data = f.getvalue()
f.close()
return data, valid_str
标签:图片格式 close line get 获取 rgb sel init 内存
原文地址:https://www.cnblogs.com/guanxiying/p/13269464.html