DNA-to-Color Encoder/Decoder

https://dnacolor.streamlit.app

This Streamlit application encodes DNA sequences into a color-coded PNG image and can also decode the image back into the original DNA sequence. It uses a K-mer based encoding scheme (default K=12) where each pixel represents a 12-base segment.

Features

• Generate Mode:
  Upload or paste a FASTA-formatted DNA sequence and create a PNG image that encodes the sequence.
  You can choose a scaling factor to enlarge the image for visualization, but decoding works best if scaling is kept at 1.

• Convert from PNG Mode:
  Upload a previously generated PNG image to decode and recover the original DNA sequence.
  If the image was scaled, the app uses embedded metadata to correctly downsample and decode.

How to Use

1. Go to: https://dnacolor.streamlit.app
2. Select Generate mode to encode a sequence into PNG:
   • Paste a sequence or upload a .fasta/.fa/.txt file.
   • Adjust the scaling if desired (note that scaling > 1 complicates decoding).
   • Click Submit to view and download the resulting PNG.
3. Select Convert from PNG mode to decode:
   • Upload the encoded PNG.
   • Click Decode to see and download the recovered DNA sequence.

Requirements

If running locally:

• Python 3.7+
• streamlit
• pillow

Install dependencies:

pip install -r requirements.txt