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import numpy as np
from PIL import Image
ASPECT_RATIO_512 = {
'0.25': [256.0, 1024.0], '0.26': [256.0, 992.0], '0.27': [256.0, 960.0], '0.28': [256.0, 928.0],
'0.32': [288.0, 896.0], '0.33': [288.0, 864.0], '0.35': [288.0, 832.0], '0.4': [320.0, 800.0],
'0.42': [320.0, 768.0], '0.48': [352.0, 736.0], '0.5': [352.0, 704.0], '0.52': [352.0, 672.0],
'0.57': [384.0, 672.0], '0.6': [384.0, 640.0], '0.68': [416.0, 608.0], '0.72': [416.0, 576.0],
'0.78': [448.0, 576.0], '0.82': [448.0, 544.0], '0.88': [480.0, 544.0], '0.94': [480.0, 512.0],
'1.0': [512.0, 512.0], '1.07': [512.0, 480.0], '1.13': [544.0, 480.0], '1.21': [544.0, 448.0],
'1.29': [576.0, 448.0], '1.38': [576.0, 416.0], '1.46': [608.0, 416.0], '1.67': [640.0, 384.0],
'1.75': [672.0, 384.0], '2.0': [704.0, 352.0], '2.09': [736.0, 352.0], '2.4': [768.0, 320.0],
'2.5': [800.0, 320.0], '2.89': [832.0, 288.0], '3.0': [864.0, 288.0], '3.11': [896.0, 288.0],
'3.62': [928.0, 256.0], '3.75': [960.0, 256.0], '3.88': [992.0, 256.0], '4.0': [1024.0, 256.0]
}
ASPECT_RATIO_RANDOM_CROP_512 = {
'0.42': [320.0, 768.0], '0.5': [352.0, 704.0],
'0.57': [384.0, 672.0], '0.68': [416.0, 608.0], '0.78': [448.0, 576.0], '0.88': [480.0, 544.0],
'0.94': [480.0, 512.0], '1.0': [512.0, 512.0], '1.07': [512.0, 480.0],
'1.13': [544.0, 480.0], '1.29': [576.0, 448.0], '1.46': [608.0, 416.0], '1.75': [672.0, 384.0],
'2.0': [704.0, 352.0], '2.4': [768.0, 320.0]
}
ASPECT_RATIO_RANDOM_CROP_PROB = [
1, 2,
4, 4, 4, 4,
8, 8, 8,
4, 4, 4, 4,
2, 1
]
ASPECT_RATIO_RANDOM_CROP_PROB = np.array(ASPECT_RATIO_RANDOM_CROP_PROB) / sum(ASPECT_RATIO_RANDOM_CROP_PROB)
def get_closest_ratio(height: float, width: float, ratios: dict = ASPECT_RATIO_512):
aspect_ratio = height / width
closest_ratio = min(ratios.keys(), key=lambda ratio: abs(float(ratio) - aspect_ratio))
return ratios[closest_ratio], float(closest_ratio)
def get_width_and_height_from_image_and_base_resolution(image, base_resolution):
target_pixels = int(base_resolution) * int(base_resolution)
original_width, original_height = Image.open(image).size
ratio = (target_pixels / (original_width * original_height)) ** 0.5
width_slider = round(original_width * ratio)
height_slider = round(original_height * ratio)
return height_slider, width_slider |