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35 lines
1.0 KiB
Python
35 lines
1.0 KiB
Python
from PIL import Image
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import numpy as np
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from ocrd_models import OcrdExif
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from cv2 import COLOR_GRAY2BGR, COLOR_RGB2BGR, COLOR_BGR2RGB, cvtColor, imread
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# from sbb_binarization
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def cv2pil(img):
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return Image.fromarray(np.array(cvtColor(img, COLOR_BGR2RGB)))
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def pil2cv(img):
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# from ocrd/workspace.py
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color_conversion = COLOR_GRAY2BGR if img.mode in ('1', 'L') else COLOR_RGB2BGR
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pil_as_np_array = np.array(img).astype('uint8') if img.mode == '1' else np.array(img)
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return cvtColor(pil_as_np_array, color_conversion)
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def check_dpi(img):
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try:
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if isinstance(img, Image.Image):
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pil_image = img
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elif isinstance(img, str):
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pil_image = Image.open(img)
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else:
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pil_image = cv2pil(img)
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exif = OcrdExif(pil_image)
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resolution = exif.resolution
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if resolution == 1:
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raise Exception()
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if exif.resolutionUnit == 'cm':
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resolution /= 2.54
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return int(resolution)
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except Exception as e:
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print(e)
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return 230
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