cbl-js

A library for CAPTCHA solving written in pure JavaScript using the HTML5 canvas.

View a working example or read the quick start guide.

preprocess: function(img) {
    img.removeGray(20);
    img.blur(2);
    img.binarize(190);
    img.colorRegions(40, true);
}

Learn by reviewing dozens of example solutions to common patterns found in CAPTCHAs.

• Exact Character Splitting
• Background Noise Removal
• Disconnected Characters
• Convolution Filters
• Image Preprocessing
• Image Segmentation
• Training and Classification
• Saving a Model
• Simple Example
• Image Distortion
• Conditional Segmentation and Fixed Character Locations
• Exact Character Splitting
• Image Blur Tricks
• Horizontal Line Removal