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130 lines
5.4 KiB
Python
130 lines
5.4 KiB
Python
# TODO: AlternativeImage 'binarized' comment should be additive
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import os.path
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from pkg_resources import resource_string
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from json import loads
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from PIL import Image
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import numpy as np
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import cv2
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from click import command
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from ocrd_utils import (
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getLogger,
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assert_file_grp_cardinality,
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make_file_id,
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MIMETYPE_PAGE
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)
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from ocrd import Processor
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from ocrd_modelfactory import page_from_file
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from ocrd_models.ocrd_page import AlternativeImageType, to_xml
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from ocrd.decorators import ocrd_cli_options, ocrd_cli_wrap_processor
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from .sbb_binarize import SbbBinarizer
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OCRD_TOOL = loads(resource_string(__name__, 'ocrd-tool.json').decode('utf8'))
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TOOL = 'ocrd-sbb-binarize'
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def cv2pil(img):
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color_coverted = cv2.cvtColor(img, cv2.COLOR_BGRA2RGB)
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return Image.fromarray(color_coverted)
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def pil2cv(img):
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# from ocrd/workspace.py
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color_conversion = cv2.COLOR_GRAY2BGR if img.mode in ('1', 'L') else cv2.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 cv2.cvtColor(pil_as_np_array, color_conversion)
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class SbbBinarizeProcessor(Processor):
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def __init__(self, *args, **kwargs):
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kwargs['ocrd_tool'] = OCRD_TOOL['tools'][TOOL]
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kwargs['version'] = OCRD_TOOL['version']
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super().__init__(*args, **kwargs)
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def _run_binarizer(self, img):
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return cv2pil(
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SbbBinarizer(
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image=pil2cv(img),
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model=self.model_path,
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patches=self.use_patches,
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save=None).run())
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def process(self):
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"""
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Binarize with sbb_binarization
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"""
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LOG = getLogger('processor.SbbBinarize')
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assert_file_grp_cardinality(self.input_file_grp, 1)
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assert_file_grp_cardinality(self.output_file_grp, 1)
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oplevel = self.parameter['operation_level']
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self.use_patches = self.parameter['patches'] # pylint: disable=attribute-defined-outside-init
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self.model_path = self.parameter['model'] # pylint: disable=attribute-defined-outside-init
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for n, input_file in enumerate(self.input_files):
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file_id = make_file_id(input_file, self.output_file_grp)
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page_id = input_file.pageId or input_file.ID
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LOG.info("INPUT FILE %i / %s", n, page_id)
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pcgts = page_from_file(self.workspace.download_file(input_file))
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self.add_metadata(pcgts)
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pcgts.set_pcGtsId(file_id)
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page = pcgts.get_Page()
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if oplevel == 'page':
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LOG.info("Binarizing on 'page' level in page '%s'", page_id)
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page_image, page_xywh, _ = self.workspace.image_from_page(page, page_id)
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bin_image = self._run_binarizer(page_image)
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# update METS (add the image file):
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bin_image_path = self.workspace.save_image_file(bin_image,
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file_id + '.IMG-BIN',
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page_id=page_id,
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file_grp=self.output_file_grp)
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page.add_AlternativeImage(AlternativeImageType(filename=bin_image_path, comment="binarized"))
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else:
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regions = page.get_AllRegions(['Text', 'Table'])
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if not regions:
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LOG.warning("Page '%s' contains no text/table regions", page_id)
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for region in regions:
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region_image, region_xywh = self.workspace.image_from_segment(region, page_image, page_xywh)
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if oplevel == 'region':
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region_image_bin = self._run_binarizer(region_image)
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region_image_bin_path = self.workspace.save_image_file(
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region_image_bin,
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"%s_%s.IMG-BIN" % (file_id, region.id),
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page_id=page_id,
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file_grp=self.output_file_grp)
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region.add_AlternativeImage(
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AlternativeImageType(filename=region_image_bin_path, comments='binarized'))
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elif oplevel == 'line':
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lines = region.get_TextLine()
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if not lines:
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LOG.warning("Page '%s' region '%s' contains no text lines", page_id, region.id)
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for line in lines:
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line_image, line_xywh = self.workspace.image_from_segment(line, page_image, page_xywh)
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line_image_bin = self._run_binarizer(line_image)
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line_image_bin_path = self.workspace.save_image_file(
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line_image_bin,
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"%s_%s_%s.IMG-BIN" % (file_id, region.id, line.id),
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page_id=page_id,
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file_grp=self.output_file_grp)
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line.add_AlternativeImage(
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AlternativeImageType(filename=line_image_bin_path, comments='binarized'))
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self.workspace.add_file(
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ID=file_id,
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file_grp=self.output_file_grp,
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pageId=input_file.pageId,
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mimetype=MIMETYPE_PAGE,
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local_filename=os.path.join(self.output_file_grp, file_id + '.xml'),
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content=to_xml(pcgts))
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@command()
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@ocrd_cli_options
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def cli(*args, **kwargs):
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return ocrd_cli_wrap_processor(SbbBinarizeProcessor, *args, **kwargs)
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