FastDRaW 1.2.1

Image segmentation algorithm using Fast Delineation by RAndom Walker

# FastDRaW FastDRaW – Fast Delineation by Random

This software is under the MIT License. If you use this code in your research please cite the following paper:

H.-E. Gueziri, L. Lakhdar, M. J. McGuffin and C. Laporte “FastDRaW – Fast Delineation by Random Walker: application to large images”, MICCAI workshop on Interactive Medical Image Computing (IMIC), Athens, Greece, (2016).

@author Houssem-Eddine Gueziri

## Requirements:

FastDRaW requires the following packages

• [Scipy and Numpy](https://www.scipy.org/install.html)

• [PyAMG](http://pyamg.org/) (for linear system solver)

Or run

`shell sudo apt-get install build-essential python2.7-dev sudo pip install -r requirements.txt `

## Install:

From PyPI:

`shell sudo pip install FastDRaW ` From git repository:

`shell git clone https://github.com/hgueziri/FastDRaW-Segmentation.git cd FastDRaW-Segmentation sudo python setup.py install `

## Usage example:

`python >>> from FastDRaW import Segmenter >>> from skimage.data import coins >>> import matplotlib.pyplot as plt >>> image = coins() >>> labels = np.zeros_like(image) >>> labels[[129, 199], [155, 155]] = 1 # label some pixels as foreground >>> labels[[162, 224], [131, 184]] = 2 # label some pixels as background >>> fastdraw = Segmenter(image, beta=100, downsampled_size=[100,100]) >>> segm = fastdraw.update(labels) >>> plt.imshow(image,'gray') >>> plt.imshow(segm, alpha=0.7) `