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braille-art

v0.1.3

Published

Utility allowing for encoding images in Braille glyphs

Downloads

20

Readme

braille-art is a small nifty package allowing for encoding images to all-braille unicode representations. It makes use of jimp and thus supports all image types that jimp does.

Installation

npm install braille-art -S

Members

Braille is a 4x2 array of zeros and ones representing a Braille glyph, e.g.,

[
    [0, 1],
    [0, 1],
    [1, 0],
    [0, 1]
]

image2braille is a function accepting 2 parameters:

  • path to an image

  • settings object of type BrailleArtSettings:

    • white_cutoff: number above this value a shade of gray will be represented as a dot,
    • whitespace?: string | Braille, specifies what symbol is used for whitespaces. This setting is important for non-monospace fonts. The default value is an empty Braille glyph, which is (most likely) as wide as a regular whitespace and narrower than other Braille glyphs. Therefore I recommend using some Braille character which will not spoil the overall picture
    • scale?: number, image rescaling,
    • width?: number, resize image,
    • height?: number, resize image

    Scaling takes precendence over resizing. If only width or height is specified, the other side will be resized proportionally.

image2braille returns a Promise of an array of arrays of Braille unicode chars.

Usage

import { image2braille, Braille } from 'image2braille';
import { createWriteStream } from 'fs';

const settings = {
    white_cutoff: 0.5,
    whitespace: [[0, 0], [0, 0], [0, 0], [0, 1]] as Braille
};

image2braille('./shapes.png', settings).then(strimage => {
    const out = createWriteStream('text.txt');
    for (const line of strimage) {
        out.write(`${line.join('').trimRight()}\n`);
    }
    out.end();
}).catch(err => {
    console.log(`Cannot handle the request due to:\n${err}`);
});