To get started use the Wiki

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SubSpectra is a Windows desktop app that hides and detects hidden messages in images and videos using LSB steganography and forensic statistical tests like Chi-square and RS analysis.

• Built with C# WinForms
• Uses FFmpeg + LibVLCSharp for video
• Exports Excel reports with verdicts
• Includes visual filters and bit-level viewers

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🚀 Features

🔐 Hide Messages

• Embed strings in images (PNG, JPG) using R / G / B / A bit layers
• Embed 20-character messages in video center pixels (frame-by-frame)
• Preserve original audio during stego video creation

🔍 Detect Messages

• Chi-square and RS statistical tests on image & video data
• LSB bit-layer visualizer
• Excel reports with green/yellow/red status per test

🎨 Visual Filters

• Channel isolation (R, G, B, A)
• Gray, sepia, black & white
• Block-based smoothing (3×3 and 9×9)
• LSB bit removal

🧪 Forensic Testing

• Frame-by-frame analysis of videos (default is 50 frames)
• Tests multiple layers and color channels
• Color-coded Excel results for easy inspection

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📂 Panels Overview

Panel	Purpose
Panel 1	Hide / Extract messages in images
Panel 2	Hide / Extract messages in video
Panel 3	Test image using Chi / RS & visualize layers
Panel 4	Test video using Chi / RS
Panel 5	Apply filters and remove bit layers

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🛠 Setup

1. Clone the repository
2. Open in Visual Studio 2022+
3. Restore NuGet packages:

• LibVLCSharp.WinForms
• ClosedXML

4. Ensure ffmpeg.exe is accessible (ffmpeg_path)
5. Build & run (F5)

💡 Requires .NET Framework 4.8+

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📊 Sample Output

📁 Excel report example:

Test           Channel  Layer  Score      Status
Chi-square     R        0      0.91       OK
RS             G        1      0.54       Suspect