Library for adding well described noise to images.
Project description
Small library for adding well described noise to images, with a command-line utility specifically for application on Nifti formatted images.
Installation
Simple! Just open your favourite terminal and type:
$ pip install onevox
Alongside installing the oneVoxel package, this will also ensure the dependencies are installed: numpy, scipy, nibabel, and nilearn.
Usage
From within Python this library can used to apply noise to arbitrary images:
[1]: import numpy as np [2]: np.random.seed(1234) [3]: data = np.random.random((10,10,10)) # Create data matrix [4]: mask = data[:,:,0] > 0.4 # Define mask as values higher than 0.4 in the first 2D slice [5]: from onevoxel import noise # Load noise utils [6]: # Generate noise locations from image and mask [7]: loc = noise.generate_noise_params(data, mask, erode=0, mode='independent') [8]: loc [(3, 6, 0), (4, 4, 1), (9, 0, 2), (7, 9, 3), (1, 2, 4), (3, 1, 5), (0, 7, 6), (9, 0, 7), (3, 4, 8), (1, 9, 9)] [9]: # Apply noise to the image and verify it's in the right spot [10]: noisy_data, noisy_hash = noise.apply_noise_params(data, loc, scale=True, intensity=0.01) [11]: sorted(list(zip(*np.where(noisy_data != data))), key=lambda elem: elem[2]) == loc True
Contributing
Excited by the project and want to get involved?! Please check out our contributing guide, and look through the issues to start seeing where you can lend a hand. We look forward to approving your amazing contributions!
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