blurhash-bqn

Implementation of the blurhash algorithm in BQN.

Works as a library but also includes command-line scripts for encoding and decoding blurhashes quickly. The scripts also act as samples.

MIT license.

Command-line usage

Demo video

out.mp4

Encoding

./bhenc img.ppm outputs a blurhash with the default components (4,3).

Usage:
  bhenc [xcomp ycomp] <img>
      xcomp     x components (1-9; default 4)
      ycomp     y components (1-9; default 3)
      img       image file; only PPM type P6 supported for now

To get PPM files, try ImageMagick: convert img.jpg img.ppm

Displaying

./bhshow "LGFi1MUH=y#M:d5b+*Ex@[or[Q6." displays a terminal true-color rendering of the blurhash. Requires true-color support from terminal.

Decoding

./bhdec "AGFi1MUH:d5b" creates a 32x32 rendering in the file out.ppm.

Usage:
  bhdec <blurhash> [[x y] outfile]
      x         x resolution (default 32)
      y         y resolution (default 32)
      blurhash  blurhash
      outfile   output filename (default out.ppm)

Future work

• performance enhancements
• properly document the BQN API
• add browser demo
• support other image formats, probably with external libraries
• add images to readme