https://github.com/hpjansson/cropsicle

Minimal C implementation of the Growcut area selection algorithm
https://github.com/hpjansson/cropsicle

c graphics image-processing

Last synced: 3 months ago
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Minimal C implementation of the Growcut area selection algorithm

• Host: GitHub
• URL: https://github.com/hpjansson/cropsicle
• Owner: hpjansson
• License: gpl-3.0
• Created: 2014-02-03T09:58:57.000Z (almost 11 years ago)
• Default Branch: master
• Last Pushed: 2020-04-04T00:25:55.000Z (almost 5 years ago)
• Last Synced: 2023-08-12T22:53:25.875Z (over 1 year ago)
• Topics: c, graphics, image-processing
• Language: C
• Homepage:
• Size: 19.5 KB
• Stars: 9
• Watchers: 3
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

Awesome Lists containing this project

README

        
Cropsicle

=========

Cropsicle is a multithreaded C implementation of the GrowCut algorithm

described in the paper "GrowCut - Interactive Multi-Label N-D Image

Segmentation By Cellular Automata" by Vladimir Vezhnevets and Vadim

Konouchine [1].

It lets you remove the background from an image with minimal input, cutting

along irregular boundaries.

[1] http://graphicon.ru/oldgr/en/publications/text/gc2005vk.pdf

Build

-----

> gcc -g -O3 cropsicle.c $(pkg-config --libs --cflags libpng) -lm -pthread -o cropsicle

Run

---

This program supports 4-channel 8-bit-per-channel RGBA PNG images only. If

you have something else, you must convert it to the proper format first,

like this:

> convert image.jpg -channel rgba png32:image.png

Perform the GrowCut operation like this:

> cropsicle image.png overlay.png output.png

Image is the source image, overlay is an alpha-transparent overlay with

a few green pixels spread out over the foreground you want to keep

and red pixels over the background. The pixels don't have to be perfect red

and green as long as the corresponding red/green channels are dominant and

the pixels are not transparent.

Enjoy!

Example

-------

Example input and output images for the cropsicle invocation above:

* [image.png](http://hpjansson.org/cropsicle/example/surf.png)

* [overlay.png](http://hpjansson.org/cropsicle/example/surf-overlay.png)

* [output.png](http://hpjansson.org/cropsicle/example/surf-out.png)