/glitch

Pixel Sorting algorithms written in C++ with OpenMP support (can run in parallel).

Primary LanguageC++MIT LicenseMIT

Glitch Image Effect with OpenMP

dorohedoro's glitch
C++ version OpenMP version CMake version

This software has the intent to make glitch effects on an image from your command line. This is the product of school project for implementing multiparallel support to an algorithm using OpenMP software.

Prerequisites

  • C++ >= 11
  • CMake >= 3.5.1
  • OpenMP (optional)

Installation

Clone this repository and navigate under glitch/

git clone && cd glitch

Under glitch/ follow the next steps in order to make fresh build, and generate a binary file called Glitch.

  1. Remove all content inside build/ folder using the next command.

    rm -rf build/*

  2. Navigate under build/ folder. Then build with cmake which is going to generate plenty of other files. Finally run the make command to invoke the generated Makefile (one of the files generated by cmake).

    cd build/ && cmake ../ && make

  3. (Optional for linux or WSL users). After generating ./Glitch file, you can move or copy it under /usr/local/bin/ to use it everywhere on your machine. Under glitch/build run:

    sudo cp Glitch /usr/local/bin/

  4. (Optional for linux or WSL users). Test the installation:

    Glitch --help

Usage

Once the binary file called Glitch has been generated you are ready to go. To see more details about how to use this software you can type on your command line: ./Glitch --help

Which is going to display the following message:

Options:
    -i, --input <path>: Set relative path to the input image
    -o, --output <path>: Set relative path to save the output image. (default = './output.png')
    -f, --filters: Set filter(s) to be applied sequentally separeted by comma (e.g. psv,sv,psv,...). (default = psh)
            psv: pixel sort vertical
            psh: pixel sort horizontal
            sv:  swap vertical
            sh:  swap horiztonal
            s:   sort pixels

    -c, --criteria <int>: Set criteria integer for [psv, psh] filters. Recommended value between 0 - 255. (default = 35)
    -p, --parallel: A flag to enable parallel computing. (default disabled; default threads = 4)
    -t, --threads <int>: Set number of threads. (default = 4)
    -v, --verbose: A flag to enable verbose mode. (default disabled)
    -h, --help: Display this message

Here is a list of the filters you could apply with a brief description, and also a sample url-image:

Filter Name Description Sample URL-image
psv pixel sort vertical sorts each column base on -c, --criteria variable and the pixel's intensity ctrl+click
psh pixel sort horizontal sorts each row base on -c, --criteria variable and the pixel's intensity ctrl+click
sv swap vertical swaps the position of two random pixels of random columns of an image ctrl+click
sh swap horizontal swaps the position of two random pixels of random rows of an image ctrl+click
s sort pixels sorts pixels incrementally base on the pixel's intensity ctrl+click

License

This project is under the MIT license.