簡單的圖片驗證碼生成器
阿新 • • 發佈:2020-07-09
圖片驗證碼生成器
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'): """ 可以生成一個經過降噪後的隨機驗證碼的圖片 :param width: 圖片寬度 單位px :param height: 圖片高度 單位px :param code_count: 驗證碼個數 :param font_size: 字型大小 :param point_count: 噪點個數 :param line_count: 劃線個數 :param img_format: 圖片格式 :return 生成的圖片的bytes型別的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(): """獲取隨機顏色(r,g,b)""" return random.randint(0, 255), random.randint(0, 255), random.randint(0, 255) @staticmethod def getRandomStr(): """獲取一個隨機字串,每個字元的顏色也是隨機的""" 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): # 獲取一個Image物件,引數分別是RGB模式。寬240,高38,隨機顏色 image = Image.new('RGB', (self.width, self.height), (255, 255, 255)) # 獲取一個畫筆物件,將圖片物件傳過去 draw = ImageDraw.Draw(image) # 獲取一個font字型物件引數是ttf的字型檔案的目錄,以及字型的大小 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): # 獲取隨機字元 random_char = self.getRandomStr() # 在圖片上一次寫入得到的隨機字串,引數是:定位,字串,顏色,字型 draw.text((25 + i * 40, 4), random_char, self.getRandomColor(), font=font) # 儲存隨機字元,以供驗證使用者輸入的驗證碼是否正確時使用 temp.append(random_char) valid_str = ''.join(temp) # 噪點噪線 # 劃線 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()) # 畫點 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()) # 在記憶體生成圖片 from io import BytesIO f = BytesIO() image.save(f, self.img_format) data = f.getvalue() f.close() return data, valid_str