Image CAPTCHA Solver - OCR Technology
Solve traditional text-based image CAPTCHAs with advanced OCR and AI. Handle distorted text, mathematical equations, and complex backgrounds with 99.2% accuracy. Perfect for legacy systems and custom CAPTCHAs.
What are Image CAPTCHAs?
Image CAPTCHAs are the traditional form of CAPTCHA that display distorted text, numbers, or simple math problems as images. Users must correctly identify and type the characters they see. While newer CAPTCHA types have emerged, image CAPTCHAs remain widely used, especially on older websites and custom implementations.
🔤
Text Recognition
Distorted letters & numbers
🧮
Math Problems
Simple calculations
🎨
Complex Backgrounds
Noise & patterns
All Image CAPTCHA Types Supported
🔤
Distorted Text
Classic wavy, rotated text with noise
➕
Math Equations
Simple arithmetic problems as images
🔢
Alphanumeric Mix
Letters and numbers with background patterns
🔡
Case Sensitive
Uppercase/lowercase distinction required
🎨
Colored Text
Multi-colored characters on complex backgrounds
✍️
Handwritten Style
Simulated handwriting fonts
Advanced OCR Technology Stack
Pre-Processing Pipeline
- Noise Reduction: Remove background interference
- Image Enhancement: Sharpen and clarify text
- Rotation Correction: Straighten tilted text
- Segmentation: Separate individual characters
AI Recognition Engine
- Multi-Model Ensemble: Combine multiple OCR models
- Context Analysis: Use language models for validation
- Confidence Scoring: Ensure high accuracy
- Continuous Learning: Improve from new samples
Simple Integration Examples
import base64
from ai4cap import AI4CAPClient
client = AI4CAPClient('your-api-key')
# Method 1: From file
with open('captcha.png', 'rb') as f:
image_base64 = base64.b64encode(f.read()).decode()
solution = client.solve_image_captcha(
image=image_base64,
case_sensitive=True, # Optional: for case-sensitive CAPTCHAs
min_length=4, # Optional: minimum text length
max_length=8, # Optional: maximum text length
numeric_only=False, # Optional: numbers only
alpha_only=False, # Optional: letters only
language="en" # Optional: language hint
)
print(f"Solved text: {solution['text']}")
# Method 2: From URL
solution = client.solve_image_captcha_url(
image_url="https://example.com/captcha.jpg",
case_sensitive=False
)const AI4CAPClient = require('ai4cap');
const fs = require('fs');
const client = new AI4CAPClient('your-api-key');
// Method 1: From file buffer
const imageBuffer = fs.readFileSync('captcha.png');
const imageBase64 = imageBuffer.toString('base64');
async function solveImageCaptcha() {
try {
const solution = await client.solveImageCaptcha({
image: imageBase64,
caseSensitive: true,
numeric: false,
minLength: 4,
maxLength: 8,
language: 'en'
});
console.log('Solved:', solution.text);
// Use in form
document.getElementById('captcha-input').value = solution.text;
} catch (error) {
console.error('Failed to solve:', error);
}
}
// Method 2: From Canvas (Browser)
function solveFromCanvas(canvas) {
const dataUrl = canvas.toDataURL('image/png');
const base64 = dataUrl.split(',')[1];
return client.solveImageCaptcha({ image: base64 });
}# Upload image and create task
curl -X POST https://api.ai4cap.com/api/captcha/solve \
-H "X-API-KEY: your-api-key" \
-H "Content-Type: application/json" \
-d '{
"type": "image",
"image": "base64-encoded-image-data",
"caseSensitive": true,
"numeric": false,
"minLength": 4,
"maxLength": 8
}'
# Response
{
"taskId": "12345678-1234-1234-1234-123456789012",
"status": "processing"
}
# Get result (after 3-5 seconds)
curl https://api.ai4cap.com/api/captcha/result/12345678-1234-1234-1234-123456789012 \
-H "X-API-KEY: your-api-key"
# Result
{
"status": "completed",
"solution": {
"text": "K7n9P",
"confidence": 0.987
}
}Advanced Features for Complex CAPTCHAs
Language Support
Recognize text in multiple languages and character sets:
Smart Filtering
Specify constraints for more accurate results:
- • Length restrictions (min/max)
- • Character type (numeric/alpha)
- • Case sensitivity options
- • Custom character sets
- • Pattern matching
Error Handling
Robust solutions for challenging CAPTCHAs:
- • Multi-pass recognition
- • Confidence thresholds
- • Alternative solutions
- • Automatic retries
- • Manual review option
Common Use Cases
Legacy System Integration
Many older websites and applications still use traditional image CAPTCHAs. Our OCR technology ensures compatibility with:
- • Government portals
- • Banking systems
- • Educational platforms
- • Legacy forums
Custom CAPTCHA Solutions
Perfect for websites with custom-built CAPTCHA systems that don't use standard providers:
- • In-house CAPTCHA generators
- • Modified open-source CAPTCHAs
- • Regional CAPTCHA variants
- • Industry-specific systems
Image CAPTCHA vs Modern Alternatives
Why Image CAPTCHAs Still Matter
Despite newer technologies, millions of websites still use image CAPTCHAs. They remain popular for simplicity, low cost, and independence from third-party services.
45%
of websites still use image CAPTCHAs
3-5s
average solving time with AI4CAP
$0.01
lowest cost per solve
Simple, Affordable Pricing
$0.01
per image CAPTCHA solved
Standard text CAPTCHAs
$0.01Math equations
$0.01Complex/handwritten
$0.015Multi-language
$0.015Volume discounts available for 100k+ solves/month