DNA color encoder - decoder / my first ever app

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1

Hello everyone, new to coding, my app (https://dnacolor.streamlit.app) encodes a DNA sequence into an RGB image. It uses a K-mer approach (default K=12) to convert chunks of the DNA sequence into a unique 24-bit color (RGB) and then arranges these colors into a visual representation.

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.

Happy to hear feedback and comments, thank you for checking it out.

2

Cool. Provide an example FASTA file. I had to search for one on the web, easy enough, but helps those like me who know nothing about this field. Thanks.

3

of course, here’s a test FASTA