Steganography

01 // SectionWhat it does

A desktop application with three tabs: hide a text message inside an image, extract a hidden message from an image, and convert JPEG or BMP images to PNG.

02 // SectionHow it works

Messages are embedded with the least significant bit (LSB) technique: the bits of the text replace the lowest bits of each pixel's colour values, so the output looks almost identical to the original.

Encoding is limited to PNG so processing stays lossless and images in other formats behave reliably; the conversion tab turns any image into PNG first.

03 // SectionStructure

The GUI is kept separate from the steganography logic:

• main.py — launches the Tkinter window and connects the tabs
• steg_logic.py — text-to-binary conversion, embedding and extraction
• gui/encode_tab.py, gui/decode_tab.py, gui/convert_tab.py — one module per tab

04 // SectionWhat I learned

Building GUIs in Python, image processing with Pillow and NumPy, modular structure, and handling files carefully so outputs never overwrite inputs.

05 // SectionScreenshots