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HSV Shift Functionality fixed #129

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HSV Shift Functionality fixed #129

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e15129c
modified doc string for HSV
Aug 3, 2018
1cdf403
modified doc string for HSV (#1)
AnsumanChand Aug 3, 2018
d08668e
HSV Shifting Functionality Added
Aug 6, 2018
fc8e5f9
Merge branch 'master' into master
bibinmjose Aug 6, 2018
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19 changes: 14 additions & 5 deletions Augmentor/Operations.py
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Original file line number Diff line number Diff line change
Expand Up @@ -35,6 +35,7 @@
import os
import random
import warnings
import cv2

# Python 2-3 compatibility - not currently needed.
# try:
Expand Down Expand Up @@ -1810,8 +1811,9 @@ def do(image):


class HSVShifting(Operation):

"""
CURRENTLY NOT IMPLEMENTED.
Implementing HSV shifting augmentation to augmentor.
"""
def __init__(self, probability, hue_shift, saturation_scale, saturation_shift, value_scale, value_shift):
Operation.__init__(self, probability)
Expand All @@ -1824,19 +1826,26 @@ def __init__(self, probability, hue_shift, saturation_scale, saturation_shift, v
def perform_operation(self, images):

def do(image):
hsv = np.array(image.convert("HSV"), 'float64')
hsv /= 255.

image = image.convert("RGB")
image = np.array(image)

hsv = cv2.cvtColor(image,cv2.COLOR_BGR2HSV)
hsv = hsv/255

hsv[..., 0] += np.random.uniform(-self.hue_shift, self.hue_shift)
hsv[..., 1] *= np.random.uniform(1 / (1 + self.saturation_scale), 1 + self.saturation_scale)
hsv[..., 1] *= np.random.uniform(1 / (1 + self.saturation_scale), 1+ self.saturation_scale)
hsv[..., 1] += np.random.uniform(-self.saturation_shift, self.saturation_shift)
hsv[..., 2] *= np.random.uniform(1 / (1 + self.value_scale), 1 + self.value_scale)
hsv[..., 2] += np.random.uniform(-self.value_shift, self.value_shift)

hsv.clip(0, 1, hsv)
hsv = np.uint8(np.round(hsv * 255.))

return Image.fromarray(hsv, "HSV").convert("RGB")
hsv = cv2.cvtColor(hsv,cv2.COLOR_HSV2BGR)
img = Image.fromarray(hsv)

return img

augmented_images = []

Expand Down
9 changes: 9 additions & 0 deletions Augmentor/Pipeline.py
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Original file line number Diff line number Diff line change
Expand Up @@ -1438,6 +1438,15 @@ def greyscale(self, probability):
else:
self.add_operation(Greyscale(probability=probability))

def hsvshifting(self, probability, hue_shift, saturation_scale, saturation_shift, value_scale, value_shift):
"""
"""
if not 0 < probability <= 1:
raise ValueError(Pipeline._probability_error_text)
else:
self.add_operation(HSVShifting(probability = probability,hue_shift = hue_shift, saturation_scale = saturation_scale, saturation_shift = saturation_shift, value_scale = value_scale, value_shift = value_shift))


def black_and_white(self, probability, threshold=128):
"""
Convert images to black and white. In other words convert the image
Expand Down