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<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Evaluation - Smart Summarizer</title>
    <link rel="stylesheet" href="{{ url_for('static', filename='css/style.css') }}">
    <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/6.4.0/css/all.min.css">
    <script src="https://cdn.jsdelivr.net/npm/chart.js"></script>
</head>
<body>
    <!-- Top Navigation Bar -->
    <nav class="top-navbar">
        <a href="/" class="navbar-logo">
            <div class="logo-circle">S</div>
            <span>Smart Summarizer</span>
        </a>
        
        <!-- Mobile Menu Toggle -->
        <button class="mobile-menu-toggle" onclick="toggleMobileMenu()">
            <i class="fas fa-bars"></i>
        </button>
        
        <div class="navbar-links" id="navbarLinks">
            <a href="/" class="nav-item">
                <i class="fas fa-home"></i> Home
            </a>
            <a href="/single-summary" class="nav-item">
                <i class="fas fa-file-alt"></i> Single Summary
            </a>
            <a href="/comparison" class="nav-item">
                <i class="fas fa-balance-scale"></i> Comparison
            </a>
            <a href="/batch" class="nav-item">
                <i class="fas fa-layer-group"></i> Batch
            </a>
            <a href="/evaluation" class="nav-item active">
                <i class="fas fa-chart-bar"></i> Evaluation
            </a>
        </div>
    </nav>
            <a href="/evaluation" class="nav-item active">
                <i class="fas fa-chart-bar"></i> Evaluation
            </a>
        </div>
    </nav>

    <!-- Page Content -->
    <div class="page-container">
        <h1 class="page-title">Metric Benchmarks</h1>
        <p class="page-subtitle">Aggregate performance data based on the ROUGE (Recall-Oriented Understudy for Gisting Evaluation) scoring system.</p>

        <!-- Content Grid -->
        <div class="evaluation-grid">
            <!-- Chart Section -->
            <div class="chart-section">
                <div class="chart-container">
                    <h3 class="chart-title">ROUGE Metric Comparison</h3>
                    <canvas id="rougeChart"></canvas>
                </div>
            </div>

            <!-- Metrics Explanation -->
            <div class="metrics-explanation">
                <h3 class="section-title">Understanding the Metrics</h3>
                
                <div class="metric-card">
                    <div class="metric-header">
                        <div class="metric-indicator" style="background: #6D8196;"></div>
                        <h4>ROUGE-1</h4>
                    </div>
                    <p>Measures the overlap of unigrams (single words) between the generated summary and the reference text. High scores indicate good content coverage.</p>
                </div>

                <div class="metric-card">
                    <div class="metric-header">
                        <div class="metric-indicator" style="background: #CBCBCB;"></div>
                        <h4>ROUGE-2</h4>
                    </div>
                    <p>Measures the overlap of bigrams (pairs of consecutive words). This is a strong indicator of fluency and phrasing quality.</p>
                </div>

                <div class="metric-card">
                    <div class="metric-header">
                        <div class="metric-indicator" style="background: #4A4A4A;"></div>
                        <h4>ROUGE-L</h4>
                    </div>
                    <p>Based on the Longest Common Subsequence. It captures sentence structure and sequential flow more effectively than simple n-gram overlap.</p>
                </div>

                <div class="insight-box">
                    <h4>MODEL INSIGHT</h4>
                    <p>"BART and PEGASUS typically outperform TextRank in ROUGE-2 and ROUGE-L as they generate fluent, abstractive prose rather than just extracting source fragments."</p>
                </div>
            </div>
        </div>
    </div>

    <!-- Footer -->
    <footer class="footer">
        <div class="footer-left">
            <div class="logo-circle" style="width: 24px; height: 24px; font-size: 0.9rem;">S</div>
            <span>Smart Summarizer</span>
        </div>
        <div class="footer-right">
            <span>© 2025 Smart Summarizer. Abdul Razzaq Ansari</span>
            <a href="https://github.com/Rajak13/Smart-Summarizer" target="_blank" class="footer-link">
                <i class="fab fa-github"></i> GitHub Repository
            </a>
        </div>
    </footer>

    <script src="{{ url_for('static', filename='js/evaluation.js') }}"></script>
    
    <!-- Mobile Menu JavaScript -->
    <script src="{{ url_for('static', filename='js/mobile-menu.js') }}"></script>
</body>
</html>