Python可以幫助我們更高效地解決一些網站提供的驗證碼問題。如下是使用Python獲取并破解新浪驗證碼的例子:
import requests from io import BytesIO from PIL import Image # 獲取驗證碼 url = 'https://login.sina.com.cn/cgi/pin.php' response = requests.get(url) img = Image.open(BytesIO(response.content)) # 處理驗證碼圖像 # 先將圖像二值化,再將每個字符摳出來 img = img.convert('L') # 轉為灰度圖像 threshold = 150 # 判斷閾值,可調整 table = [0 if i< threshold else 1 for i in range(256)] img = img.point(table, '1') # 黑白二值化 img_list = [] pos_list = [] width, height = img.size start_flag = False # 是否開始掃描驗證碼 for x in range(width): flag = False for y in range(height): if img.getpixel((x, y)): flag = True break if not flag and not start_flag: continue elif not flag and start_flag: continue elif flag and not start_flag: pos_list.append(x) start_flag = True elif flag and start_flag: continue # 處理每個字符 for i in range(4): x1 = pos_list[i] x2 = pos_list[i+1] if i< 3 else width img_list.append(img.crop((x1, 0, x2, height))) # 顯示驗證碼 for i in range(4): img_list[i].show()
如上所示,首先使用requests庫獲取驗證碼,然后使用Pillow庫(Python Imaging Library的替代庫)處理驗證碼圖像,將其轉化為黑白二值圖像并分割出每個字符。最后可以調用show()方法查看分割出的每個字符。