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<!DOCTYPE html>
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<title>Architecture | Doctane - System Design</title>
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<meta name="author" content="Purushothaman Natarajan">
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<a href="index.html" class="logo"><div class="logo-icon">🔬</div><span>Doctane</span></a>
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<ul class="nav-links">
<li><a href="index.html#features">Features</a></li>
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<a href="docs.html">Docs</a>
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<main class="main">
<div class="container">
<div class="section-header">
<h1>System Architecture</h1>
<p>Understanding Doctane's modular pipeline design</p>
</div>
<div class="architecture-diagram">
<h3 style="margin-bottom: 1.5rem; text-align: center;">Processing Pipeline</h3>
<div class="pipeline-flow">
<div class="pipeline-box animate" style="animation-delay: 0.1s;">
<h4>📄 Input</h4>
<p>Images & PDFs</p>
</div>
<span class="arrow">→</span>
<div class="pipeline-box animate" style="animation-delay: 0.2s;">
<h4>🔄 Preprocess</h4>
<p>Orientation & Straighten</p>
</div>
<span class="arrow">→</span>
<div class="pipeline-box animate" style="animation-delay: 0.3s;">
<h4>🎯 Detect</h4>
<p>Text Boxes</p>
</div>
<span class="arrow">→</span>
<div class="pipeline-box animate" style="animation-delay: 0.4s;">
<h4>📝 Recognize</h4>
<p>Text Transcription</p>
</div>
<span class="arrow">→</span>
<div class="pipeline-box animate" style="animation-delay: 0.5s;">
<h4>📦 Output</h4>
<p>Document Object</p>
</div>
</div>
</div>
<div class="component-grid">
<div class="component-card animate" style="animation-delay: 0.1s;">
<h3>🖼️ Preprocessor</h3>
<p>Handles image preprocessing including orientation detection and page straightening.</p>
<ul>
<li>Orientation Detection <span>✓</span></li>
<li>Auto-deskew <span>✓</span></li>
<li>Image Enhancement <span>✓</span></li>
</ul>
</div>
<div class="component-card animate" style="animation-delay: 0.2s;">
<h3>🎯 Detection Module</h3>
<p>Segmentation-based text detection with support for straight and rotated text.</p>
<ul>
<li>LinkNet <span>✓</span></li>
<li>DeepLabV3+ <span>✓</span></li>
<li>SegFormer <span>✓</span></li>
</ul>
</div>
<div class="component-card animate" style="animation-delay: 0.3s;">
<h3>📝 Recognition Module</h3>
<p>Sequence-to-sequence text recognition with attention mechanisms.</p>
<ul>
<li>SAR <span>✓</span></li>
<li>ViTSTR <span>✓</span></li>
<li>CRNN <span>✓</span></li>
</ul>
</div>
<div class="component-card animate" style="animation-delay: 0.4s;">
<h3>🔧 Builder Module</h3>
<p>Constructs hierarchical Document objects with structure preservation.</p>
<ul>
<li>Page <span>✓</span></li>
<li>Block <span>✓</span></li>
<li>Line/Word <span>✓</span></li>
</ul>
</div>
<div class="component-card animate" style="animation-delay: 0.5s;">
<h3>⚡ Training Module</h3>
<p>Distributed training support with DDP for multi-GPU setups.</p>
<ul>
<li>DDP Support <span>✓</span></li>
<li>Checkpointing <span>✓</span></li>
<li>Logging <span>✓</span></li>
</ul>
</div>
<div class="component-card animate" style="animation-delay: 0.6s;">
<h3>🌐 Export Module</h3>
<p>Multiple output formats for downstream processing.</p>
<ul>
<li>JSON <span>✓</span></li>
<li>hOCR <span>✓</span></li>
<li>PDF <span>○</span></li>
</ul>
</div>
</div>
<div class="data-flow">
<h3>Data Flow Architecture</h3>
<div class="flow-step animate" style="animation-delay: 0.1s;">
<div class="flow-step-num">1</div>
<div class="flow-step-content"><h4>Image Input</h4><p>Raw images (PNG, JPG, PDF) are loaded and converted to numpy arrays</p></div>
</div>
<div class="flow-step animate" style="animation-delay: 0.2s;">
<div class="flow-step-num">2</div>
<div class="flow-step-content"><h4>Preprocessing</h4><p>OrientationPredictor detects page tilt, OrientationCorrector straightens if needed</p></div>
</div>
<div class="flow-step animate" style="animation-delay: 0.3s;">
<div class="flow-step-num">3</div>
<div class="flow-step-content"><h4>Text Detection</h4><p>DetectionPredictor runs segmentation model to produce binary mask of text regions</p></div>
</div>
<div class="flow-step animate" style="animation-delay: 0.4s;">
<div class="flow-step-num">4</div>
<div class="flow-step-content"><h4>Crop Extraction</h4><p>Geometry module extracts ROIs based on detection mask contours</p></div>
</div>
<div class="flow-step animate" style="animation-delay: 0.5s;">
<div class="flow-step-num">5</div>
<div class="flow-step-content"><h4>Text Recognition</h4><p>RecognitionPredictor transcribes each crop to text using trained model</p></div>
</div>
<div class="flow-step animate" style="animation-delay: 0.6s;">
<div class="flow-step-num">6</div>
<div class="flow-step-content"><h4>Document Assembly</h4><p>DocumentBuilder assembles Page → Block → Line → Word hierarchy with confidence</p></div>
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