spiky-clouds v1.0.1

Spiky Clouds

This is a filter that converts images into spiky images. The image is created by drawing needles instead o pixels for each pixel value.

You get a crappy drawing of yours and transforms it into a spooky image:

Original	Spiky

Installation

npm install spiky-clouds

Dependencies

• Processing
• XVFB

Usage

const sc = require("spiky-clouds")
sc(inputFile, outputFile, {seed: 42}).then(() => {
  console.log("done!");
});

sc(inputFile, outputFile[, opts]):

Applies the filter in the inputFile generating the outputFile.

opts:

• seed: Chooses the seed to be used for pseudo random number generation.
• minLength: Chooses the minimum length of a needle. Default: 0.00 (0%).
• maxLength: Chooses the maximum length of a needle. Default: 0.02 (2%).
• minWidth: Chooses the minimum width of a needle. Default: 0.0005 (0.05%).
• maxWidth: Chooses the maximum width of a needle. Default: 0.001 (0.1%).
• alpha: Sets the value for the alpha channel for the needles. Default: 255
• rotation: Chooses the mode in which the needles align. Default: "min_gradient". Available modes:
  • min_gradient: Draws the needles in the direction of the smallest gradient.
  • max_gradient: Draws the needles in the direction of the largest gradient.
  • random: Draws the needles randomly.
• angles: Limits the available angles (in degrees) for the rotation modes, eg: [0, 180] - horizontal needles.
• verbose: Shows the progress of the render.

The arguments maxLength, minLength, maxWidth, minWidth Their value should be a float that represents a percentage of the perimeter, eg: 0.05 => 5% of the perimeter.

Command line

There's also a command line application

Usage: spiky-clouds [-h | -v] [OPTS] INPUT_FILE OUTPUT_FILE
Converts images applying the 'spiky-clouds' filter

Arguments:
  -h, --help        Show this help.
  -v, --version     Shows the software version.
  -s, --seed        Chooses the seed to be used for pseudo random number generation.
  -l, --min-length  Chooses the minimum length of a needle. Default: 0.00 (0%).
  -L, --max-length  Chooses the maximum length of a needle. Default: 0.02 (2%).
  -w, --min-width   Chooses the minimum width of a needle. Default: 0.0005 (0.05%).
  -W, --max-width   Chooses the maximum width of a needle. Default: 0.001 (0.1%).
  -a, --alpha       Sets the value for the alpha channel for the needles. Default: 255
  -r, --rotation    Chooses the mode in which the needles align. Default: "min_gradient".
    Available modes:
      min_gradient  Draws the needles in the direction of the smallest gradient.
      max_gradient  Draws the needles in the direction of the largest gradient.
      random        Draws the needles randomly.
  -g, --angles:     Limits the available angles (in radians) for the rotation modes, eg: "[0, PI]" - horizontal needles.
  --verbose:        Shows the progress of the render

Examples

Mode	Lena	Logo
Original
Minimum gradient rotation
Maximum gradient rotation
Random rotation
Medium alpha
Low alpha
Big needle length
Small needle length
Medium needle width
Big needle width
Angles: 45°, 135°, -45° -135°

License

This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.

This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.

You should have received a copy of the GNU General Public License along with this program. If not, see http://www.gnu.org/licenses/.