Captcha Recognition Service: CNN Image Recognition API Integration

When bots meet CAPTCHA, what's the play?

The old iron who has engaged in data collection knows that CAPTCHA is like a roadblock, especially the perverted CAPTCHA with twisted text + interference line that is popular now. Our team took over an e-commerce price comparison project last year.Success rate with traditional OCR recognition is less than 30%, so angry that the programmer boy almost smashed his keyboard.

This is where CNNs (Convolutional Neural Networks) come in. It's like equipping a machine with human eyes to recognize the twists and turns in a picture. However, calling the recognition APIs directly can lead toHigh Frequency Access Trigger Protectionof the problem - just like if you go to the supermarket and swipe your face frequently, the security guards are sure to check if you're stepping on it.

Agent IP's Masquerade Party

And here's our secret weapon.ipipgo dynamic proxy ip. Think of each IP address like a mask at a masquerade ball, and each time you request a new mask, the server won't recognize you as the same person. This is done in three steps:

Tested on ipipgoHybrid Agent PoolThe average daily processing volume has skyrocketed from 500 times to 20,000 times, and the recognition accuracy rate has remained above 92%. There is a feedback from a customer who does ticket monitoring that it is now faster than scalping to grab limited edition artifacts.

Hands-on interface tuning

Take Python as an example, integrate ipipgo proxy and CNN service just like this (the code is made anti-climbing processing):

import requests
from PIL import Image

proxy = {"http": "http://user:pass@gateway.ipipgo.com:9020"}
resp = requests.get('CAPTCHA address', proxies=proxy)
img = Image.open(resp.content)
 Calling the CNN Recognition API...

focus on: Remember to set3 seconds timeout for automatic switchingWhen there is a sudden escalation in CAPTCHA complexity (e.g. during holiday events), ipipgo's smart routing will automatically assign high stash IPs.

Questions and Answers about Treading the Pit

Q: Why is there a sudden drop in recognition rate?
A: 80% of the target site enabled behavior detection, do not just change the IP, remember to adjust the mouse track simulation!

Q: How do I choose a package for ipipgo?
A: For small projects"Reptile Special Package"Sufficient, need to be 7 × 24 hours to monitor the selection of the"Corporate Exclusive Access"We have a client who's been running on this package for 78 days without being blocked.

Q: What should I do if I encounter a sliding captcha?
A: CNN recognition + trajectory simulation two-pronged, ipipgo's mobile agent can simulate the real mobile network environment

The Metaphysical Art of Anti-Blocking

Finally, I'd like to share a tasty operation: deploy proxy IPs and CNN services on servers in different time zones. For example, with ipipgo'sNorth American NodeGet the CAPTCHA withAsia NodeDoing recognition calculations, the server sees the geographic location and access rhythm closer to the real person. There is a cross-border price comparison team to test, so that the operation can reduce the probability of banning more than 60%.

Remember that CAPTCHA attack and defense is a constant battle.ipipgo recently went live with the AI Smart Routing featureIt can automatically adjust the proxy strategy according to the strength of the wind control of the target website. Next time you encounter a perverted CAPTCHA, don't be hard, change your vest and continue to do it!