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augmix-tf-1.1.0


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توضیحات

An implementation of novel data augmentation AugMix (2020) in TensorFlow. It runs on TPU.
ویژگی مقدار
سیستم عامل -
نام فایل augmix-tf-1.1.0
نام augmix-tf
نسخه کتابخانه 1.1.0
نگهدارنده []
ایمیل نگهدارنده []
نویسنده Michal Szachniewicz
ایمیل نویسنده mszachniewicz@outlook.com
آدرس صفحه اصلی https://github.com/szacho/augmix-tf
آدرس اینترنتی https://pypi.org/project/augmix-tf/
مجوز MIT
# augmix-tf Augmix-tf is an implementation of novel data augmentation [AugMix (2020)]([https://arxiv.org/pdf/1912.02781.pdf](https://arxiv.org/pdf/1912.02781.pdf)) in TensorFlow. It runs on TPU. AugMix utilizes simple augmentation operations which are stochastically sampled and layered to produce a high diversity of augmented images. The process of mixing basic tranformations into augmented image is shown below (picture taken from the original paper). This augmentation performs better when used in concert with Jensen-Shannon Divergence Consistency Loss. ![AugMix pipeline](https://i.ibb.co/YNfsHPF/Capture.png) ## Installation ```pip install augmix-tf``` ## Usage ### AugMix The main function, which does the augmentation is AugMix.transform, let's print a docstring of it. ```python from augmix import AugMix print(AugMix.transform.__doc__) ``` ``` Performs AugMix data augmentation on given image. Parameters: image (tf tensor): an image tensor with shape (x, x, 3) and values scaled to range [0, 1] severity (int): level of a strength of transformations (integer from 1 to 10) width (int): number of different chains of transformations to be mixed depth (int): number of transformations in one chain, -1 means random from 1 to 3 Returns: tensor: augmented image ``` **Example 1** - transforming a single image ```python from PIL import Image import numpy as np import tensorflow as tf import matplotlib.pyplot as plt from augmix import AugMix # precalculated means and stds of the dataset (in RGB order) means = [0.44892993872313053, 0.4148519066242368, 0.301880284715257] stds = [0.24393544875614917, 0.2108791383467354, 0.220427056859487] ag = AugMix(means, stds) # preprocess image = np.asarray(Image.open('geranium.jpg')) image = tf.convert_to_tensor(image) image = tf.cast(image, dtype=tf.float32) image = tf.image.resize(image, (331, 331)) # resize to square image /= 255 # scale to [0, 1] # augment augmented = ag.transform(image) # visualize comparison = tf.concat([image, augmented], axis=1) plt.imshow(comparison.numpy()) plt.title("Original image (left) and augmented image (right).") plt.show() ``` ![result of example 1](https://i.ibb.co/PDZp51S/Figure-1.png)) **Example 2** - transforming a dataset of images ```python # here a dataset is a tf.data.Dataset object # assuming images are properly preprocessed (see example 1) dataset = dataset.map(lambda img: ag.transform(img)) ``` **Example 3** - transforming a dataset to use with the Jensen-Shannon loss ```python # here a dataset is a tf.data.Dataset object # assuming images are properly preprocessed (see example 1) dataset = dataset.map(lambda img: (img, ag.transform(img), ag.transform(img))) ``` ## Visualization ### AugMix **original images** ![original images](https://raw.githubusercontent.com/szacho/augmix-tf/master/images/original.png) **augmented** ![visualization of augmix](https://raw.githubusercontent.com/szacho/augmix-tf/master/images/augmented.png) ### Simple transformations AugMix mixes images transformed by simple augmentations defined in ```transformations.py``` file. Every transformation function takes an image and level parameter that determines a strength of this transformation. This level parameter has the same value as severity parameter in AugMix.transform function, so again it is the integer between 1 and 10, where 10 means the strongest augmentation. These functions can be used by itself. Below is a visualization what every simple augmentation does to a batch of images (at level 10). **translate_x, translate_y** ![translate](https://raw.githubusercontent.com/szacho/augmix-tf/master/images/translate.png) **rotate** ![rotate](https://raw.githubusercontent.com/szacho/augmix-tf/master/images/rotate.png) **shear_x, shear_y** ![shear](https://raw.githubusercontent.com/szacho/augmix-tf/master/images/shear.png) **solarize** ![solarize](https://raw.githubusercontent.com/szacho/augmix-tf/master/images/solarize.png) **solarize_add** ![solarize add](https://raw.githubusercontent.com/szacho/augmix-tf/master/images/solarize_add.png) **posterize** ![posterize](https://raw.githubusercontent.com/szacho/augmix-tf/master/images/posterize.png) **autocontrast** ![autocontrast](https://raw.githubusercontent.com/szacho/augmix-tf/master/images/autocontrast.png) **contrast** ![contrast](https://raw.githubusercontent.com/szacho/augmix-tf/master/images/contrast.png) **equalize** ![equalize](https://raw.githubusercontent.com/szacho/augmix-tf/master/images/equalize.png) **brightness** ![brightness](https://raw.githubusercontent.com/szacho/augmix-tf/master/images/brightness.png) **color** ![color](https://raw.githubusercontent.com/szacho/augmix-tf/master/images/color.png) ## More information - [AugMix paper](https://arxiv.org/pdf/1912.02781.pdf) ## TODO - batch implementation of AugMix - possibility to choose basic transformations easily - appendix - calculation of mean and standard devation on a dataset - implementation of Jensen-Shannon Divergence Consistency Loss ## License MIT


نیازمندی

مقدار نام
- tensorflow
- tensorflow-probability


نحوه نصب


نصب پکیج whl augmix-tf-1.1.0:

    pip install augmix-tf-1.1.0.whl


نصب پکیج tar.gz augmix-tf-1.1.0:

    pip install augmix-tf-1.1.0.tar.gz