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Add util image scripts.
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tools/augment_images.py
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94
tools/augment_images.py
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#!/usr/bin/env python2
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# This file is part of the OpenMV project.
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# Copyright (c) 2017-2018
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# Ibrahim Abdelkader <iabdalkader@openmv.io> & Kwabena W. Agyeman <kwagyeman@openmv.io>
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# This work is licensed under the MIT license, see the file LICENSE for details.
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#
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# This script augments an image dataset.
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import os, sys
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import argparse
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import random
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import cv2
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import numpy as np
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import imgaug as ia
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from imgaug import augmenters as iaa
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from tqdm import tqdm
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def main():
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# CMD args parser
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parser = argparse.ArgumentParser(description='Augment image datasets')
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parser.add_argument("--input", action = "store", help = "Input images dir")
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parser.add_argument("--output", action = "store", help = "Output images dir")
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parser.add_argument("--count", action = "store", help = "Number of augmented sets to make", type=int, default=1)
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# Parse CMD args
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args = parser.parse_args()
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if (args.input == None or args.output == None):
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parser.print_help()
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sys.exit(1)
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ia.seed(1)
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paths = os.listdir(args.input)
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for x in range(args.count):
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seq = iaa.Sequential([
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iaa.Fliplr(0.5), # horizontal flips
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# Small gaussian blur with random sigma between 0 and 0.5.
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# But we only blur about 50% of all images.
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iaa.Sometimes(0.5,
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iaa.GaussianBlur(sigma=(0, 0.2))
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),
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# Add gaussian noise.
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# For 50% of all images, we sample the noise once per pixel.
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# For the other 50% of all images, we sample the noise per pixel AND
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# channel. This can change the color (not only brightness) of the pixels.
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iaa.Sometimes(0.5,
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iaa.AdditiveGaussianNoise(
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loc=0, scale=(0.0, 0.005*255), per_channel=0.5
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)
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),
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# Make some images brighter and some darker.
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# In 20% of all cases, we sample the multiplier once per channel,
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# which can end up changing the color of the images.
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iaa.Sometimes(0.5,
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iaa.Multiply((0.8, 1.2), per_channel=0.0),
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),
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# Apply affine transformations to each image.
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# Scale/zoom images.
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iaa.Sometimes(0.5,
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iaa.Affine(
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rotate=(-20, 20),
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),
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),
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# Translate/move images.
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iaa.Sometimes(0.5,
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iaa.Affine(
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scale={"x": (0.8, 1.2), "y": (0.8, 1.2)},
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),
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),
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# Rotate images.
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iaa.Sometimes(0.5,
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iaa.Affine(
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translate_percent={"x": (-0.1, 0.1), "y": (-0.1, 0.1)},
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),
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),
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], random_order=True) # apply augmenters in random order
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print("Augmenting images set %d/%d"%(x+1, args.count))
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for i in tqdm(xrange(len(paths))):
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img = cv2.imread(args.input+'/'+paths[i], cv2.IMREAD_GRAYSCALE)
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img = seq.augment_image(img)
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f = os.path.splitext(paths[i])
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cv2.imwrite(args.output+'/'+f[0] + '_aug%d'%(x) + f[1], img)
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print('Finished processing all images\n')
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if __name__ == '__main__':
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main()
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52
tools/make_patches.py
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tools/make_patches.py
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#!/usr/bin/env python2
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# This file is part of the OpenMV project.
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# Copyright (c) 2017-2018
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# Ibrahim Abdelkader <iabdalkader@openmv.io> & Kwabena W. Agyeman <kwagyeman@openmv.io>
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# This work is licensed under the MIT license, see the file LICENSE for details.
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#
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# This script creates smaller patches from images.
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import os, sys
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import argparse
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import random
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import numpy as np
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from skimage import io
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from skimage import exposure
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from sklearn.feature_extraction import image
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def main():
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# CMD args parser
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parser = argparse.ArgumentParser(description='Generate smaller patches from images')
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parser.add_argument("--input", action = "store", help = "Input images dir")
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parser.add_argument("--output", action = "store", help = "Output images dir")
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parser.add_argument("--width", action = "store", help = "Patch width", type=int, default = 32)
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parser.add_argument("--height", action = "store", help = "Patch height", type=int, default = 32)
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parser.add_argument("--patches", action = "store", help = "Number of patches", type=int, default = 10)
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# Parse CMD args
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args = parser.parse_args()
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if (args.input == None or args.output == None):
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parser.print_help()
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sys.exit(1)
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count = 0
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images = os.listdir(args.input)
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while (count < args.patches):
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random.shuffle(images)
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for i in xrange(len(images)):
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img = io.imread(args.input+'/'+images[i])
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patches = image.extract_patches_2d(img,
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patch_size=(args.width, args.height),
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max_patches=100, random_state=np.random.RandomState(0))
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random.shuffle(patches)
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for p in patches:
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# Save low contrast patches only
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if (exposure.is_low_contrast(p) == False):
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io.imsave(args.output+'/patch_%.4d.ppm'%(count), p)
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count += 1
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break
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if (count == args.patches):
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break
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if __name__ == '__main__':
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main()
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