mirror of
https://gitlab.ub.uni-bielefeld.de/sfb1288inf/ocr.git
synced 2024-12-26 04:34:17 +00:00
Add PDF compression
This commit is contained in:
Stephan Porada
parent
b77ca5914f
commit
ec5b4eb521
@ -13,6 +13,7 @@ RUN apt-get update \
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build-essential \
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ca-certificates \
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gnupg2 \
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ghostscript \
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imagemagick \
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poppler-utils \
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python2.7 \
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151
ocr
151
ocr
@ -24,19 +24,33 @@ TESSERACT_MODELS = ['deu', 'eng', 'enm', 'fra', 'frk', 'frm', 'ita', 'por',
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def parse_args():
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parser = ArgumentParser(description='OCR Pipeline utilizing tesseract.')
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parser.add_argument('i')
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parser.add_argument('o')
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parser.add_argument('-l', '--language', choices=TESSERACT_MODELS,
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parser.add_argument('i', help='Input directory for OCR. One PDf equals one\
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job')
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parser.add_argument('o', help='Output directory containing OCR results.')
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parser.add_argument('-l', '--language',
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choices=TESSERACT_MODELS,
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required=True)
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parser.add_argument('--binarize', action='store_true',
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help='use ocropy binarisation')
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parser.add_argument('--keep-intermediates', action='store_true',
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help='keep intermediate files')
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parser.add_argument('--binarize',
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action='store_true',
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help='Use ocropy binarisation as preprocessing step.')
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parser.add_argument('--keep-intermediates',
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action='store_true',
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help='Keep intermediate files for debugging etc.',
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required=False)
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parser.add_argument('--n-cores',
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default=min(4, multiprocessing.cpu_count()),
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help='total number of cores available', type=int)
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parser.add_argument('--log-dir')
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parser.add_argument('--zip')
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help='Total number of cores available.',
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type=int,
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required=False)
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parser.add_argument('--zip', help='Zips all results in different archives \
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depending on result types. Also zips \
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everything into one archive.',
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required=False)
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parser.add_argument('-c', '--compress',
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help='Compress the final PDF result file.',
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required=False,
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action='store_true')
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parser.add_argument('--log_dir')
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return parser.parse_args()
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@ -49,7 +63,7 @@ class OCRPipelineJob:
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class OCRPipeline(WorkflowRunner):
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def __init__(self, binarize, jobs, keep_intermediates, lang, n_cores,
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output_dir, zip):
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output_dir, zip, compress):
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self.binarize = binarize
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self.jobs = jobs
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self.keep_intermediates = keep_intermediates
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@ -57,6 +71,7 @@ class OCRPipeline(WorkflowRunner):
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self.n_cores = n_cores
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self.output_dir = output_dir
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self.zip = zip
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self.compress = compress
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def workflow(self):
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if not self.jobs:
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@ -103,7 +118,7 @@ class OCRPipeline(WorkflowRunner):
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cmd += ' -tiff'
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cmd += ' -tiffcompression lzw'
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cmd += ' "{}" "{}"'.format(job.file, output_file_base)
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deps = 'mkdir_job_-_{}'.format(i)
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deps = mkdir_jobs
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lbl = 'pdftoppm_job_-_{}'.format(i)
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pdftoppm_jobs.append(self.addTask(command=cmd, dependencies=deps,
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label=lbl, nCores=n_cores))
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@ -137,7 +152,7 @@ class OCRPipeline(WorkflowRunner):
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cmd = 'ocropus-nlbin "{}"'.format('" "'.join(files))
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cmd += ' -o "{}"'.format(output_dir)
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cmd += ' -Q "{}"'.format(n_cores)
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deps = 'pdftoppm_job_-_{}'.format(i)
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deps = pdftoppm_jobs
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lbl = 'ocropus_nlbin_job_-_{}'.format(i)
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ocropus_nlbin_jobs.append(
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self.addTask(command=cmd, dependencies=deps, label=lbl,
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@ -167,7 +182,7 @@ class OCRPipeline(WorkflowRunner):
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output_file = os.path.join(output_dir, 'page-{}.bin.png'.format(int(file.split('.', 1)[0]))) # noqa
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cmd = 'mv "{}" "{}"'.format(os.path.join(output_dir, file),
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output_file)
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deps = 'ocropus_nlbin_job_-_{}'.format(i)
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deps = ocropus_nlbin_jobs
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lbl = 'post_ocropus_nlbin_job_-_{}-{}'.format(i, number)
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post_ocropus_nlbin_jobs.append(
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self.addTask(command=cmd, dependencies=deps,
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@ -207,9 +222,9 @@ class OCRPipeline(WorkflowRunner):
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cmd += ' -l "{}"'.format(self.lang)
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cmd += ' hocr pdf txt'
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if self.binarize:
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deps = 'post_ocropus_nlbin_job_-_{}-{}'.format(i, number)
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deps = post_ocropus_nlbin_jobs
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else:
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deps = 'pdftoppm_job_-_{}'.format(i)
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deps = pdftoppm_jobs
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label = 'tesseract_jobs_-_{}-{}'.format(i, number)
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tesseract_jobs.append(
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self.addTask(command=cmd, dependencies=deps, label=label,
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@ -237,8 +252,7 @@ class OCRPipeline(WorkflowRunner):
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output_file = os.path.join(job.output_dir,
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'{}.xml'.format(job.name))
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cmd = 'hocrtotei "{}" "{}"'.format('" "'.join(files), output_file)
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deps = filter(lambda x: x.startswith('ocr_job_-_{}'.format(i)),
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tesseract_jobs)
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deps = tesseract_jobs
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lbl = 'hocrtotei_job_-_{}'.format(i)
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hocrtotei_jobs.append(self.addTask(command=cmd, dependencies=deps,
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label=lbl))
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@ -272,8 +286,7 @@ class OCRPipeline(WorkflowRunner):
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output_path_base = os.path.join(job.output_dir, 'PoCo')
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output_path = os.path.join(output_path_base, 'hocr')
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cmd = 'cp "{}" "{}"'.format('" "'.join(files), output_path)
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deps = filter(lambda x: x.startswith('ocr_job_-_{}'.format(i)),
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tesseract_jobs)
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deps = tesseract_jobs
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lbl = 'hocr_poco_jobs-_{}'.format(i)
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hocr_poco_jobs.append(self.addTask(command=cmd, dependencies=deps,
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label=lbl))
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@ -293,8 +306,7 @@ class OCRPipeline(WorkflowRunner):
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output_path_base = os.path.join(job.output_dir, 'PoCo')
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output_path = os.path.join(output_path_base, 'tiff')
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cmd = 'cp "{}" "{}"'.format('" "'.join(files), output_path)
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deps = filter(lambda x: x.startswith('ocr_job_-_{}'.format(i)),
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tesseract_jobs)
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deps = tesseract_jobs
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lbl = 'tiff_poco_jobs-_{}'.format(i)
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tiff_poco_jobs.append(self.addTask(command=cmd, dependencies=deps,
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label=lbl))
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@ -313,8 +325,7 @@ class OCRPipeline(WorkflowRunner):
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output_file = os.path.join(job.output_dir,
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'{}.pdf'.format(job.name))
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cmd = 'pdfunite "{}" "{}"'.format('" "'.join(files), output_file)
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deps = filter(lambda x: x.startswith('ocr_job_-_{}'.format(i)),
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tesseract_jobs)
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deps = tesseract_jobs
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lbl = 'pdfunite_job_-_{}'.format(i)
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pdfunite_jobs.append(self.addTask(command=cmd, dependencies=deps,
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label=lbl))
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@ -333,11 +344,52 @@ class OCRPipeline(WorkflowRunner):
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output_file = os.path.join(job.output_dir,
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'{}.txt'.format(job.name))
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cmd = 'cat "{}" > "{}"'.format('" "'.join(files), output_file)
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deps = filter(lambda x: x.startswith('ocr_job_-_{}'.format(i)),
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tesseract_jobs)
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deps = tesseract_jobs
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lbl = 'cat_job_-_{}'.format(i)
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cat_jobs.append(self.addTask(command=cmd, dependencies=deps,
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label=lbl))
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'''
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' The following jobs are created based of the output files of the
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' pdfunite_jobs. So wait until they are finished.
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'''
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self.waitForTasks()
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'''
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' ##################################################
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' # compress_jobs #
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' ##################################################
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'''
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compress_jobs = []
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if self.compress:
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for i, job in enumerate(self.jobs):
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print(os.listdir(job.output_dir))
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file = filter(lambda x: x.endswith('.pdf'),
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os.listdir(job.output_dir))[0]
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original_file = os.path.join(job.output_dir, file)
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compressed_file = os.path.join(job.output_dir, 'c_' + file)
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cmd = ('gs '
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+ '-sDEVICE=pdfwrite '
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+ '-dCompatibilityLevel=1.4 '
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+ '-dPDFSETTINGS=/ebook '
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+ '-dNOPAUSE '
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+ '-dQUIET '
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+ '-dBATCH '
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+ '-sOutputFile={o} {i} ').format(o=compressed_file,
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i=original_file)
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cmd += '&& rm {original_f} '.format(original_f=original_file)
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cmd += ('&& mv {compressed_f} '
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+ '{original_f} ').format(compressed_f=compressed_file,
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original_f=original_file)
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deps = (hocrtotei_jobs
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+ tesseract_jobs
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+ pdfunite_jobs
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+ cat_jobs
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+ hocr_poco_jobs
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+ tiff_poco_jobs)
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lbl = 'compress_job_-_{}'.format(i)
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compress_jobs.append(self.addTask(command=cmd,
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dependencies=deps,
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label=lbl))
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'''
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' ##################################################
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@ -345,6 +397,13 @@ class OCRPipeline(WorkflowRunner):
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' ##################################################
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'''
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zip_jobs = []
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deps = (hocrtotei_jobs
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+ tesseract_jobs
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+ pdfunite_jobs
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+ cat_jobs
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+ hocr_poco_jobs
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+ tiff_poco_jobs
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+ compress_jobs)
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if self.zip is not None:
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# Remove .zip file extension if provided
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if self.zip.endswith('.zip'):
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@ -360,11 +419,6 @@ class OCRPipeline(WorkflowRunner):
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cmd += ' -i "*.pdf" "*.txt" "*.xml" "*.hocr" "*.tif"'
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cmd += ' && '
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cmd += 'cd -'
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deps = (hocrtotei_jobs
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+ pdfunite_jobs
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+ cat_jobs
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+ hocr_poco_jobs
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+ tiff_poco_jobs)
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lbl = 'zip_job_-_all'
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zip_jobs.append(self.addTask(command=cmd, dependencies=deps,
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label=lbl))
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@ -378,7 +432,7 @@ class OCRPipeline(WorkflowRunner):
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cmd += ' -i "*.pdf"'
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cmd += ' && '
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cmd += 'cd -'
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deps = 'zip_job_-_all'
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deps = deps + ['zip_job_-_all']
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lbl = 'zip_job_-_pdf'
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zip_jobs.append(self.addTask(command=cmd, dependencies=deps,
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label=lbl))
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@ -392,7 +446,7 @@ class OCRPipeline(WorkflowRunner):
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cmd += ' -i "*.txt"'
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cmd += ' && '
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cmd += 'cd -'
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deps = 'zip_job_-_all'
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deps = deps + ['zip_job_-_all']
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lbl = 'zip_job_-_txt'
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zip_jobs.append(self.addTask(command=cmd, dependencies=deps,
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label=lbl))
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@ -406,7 +460,7 @@ class OCRPipeline(WorkflowRunner):
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cmd += ' -i "*.xml"'
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cmd += ' && '
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cmd += 'cd -'
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deps = 'zip_job_-_all'
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deps = deps + ['zip_job_-_all']
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lbl = 'zip_job_-_xml'
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zip_jobs.append(self.addTask(command=cmd, dependencies=deps,
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label=lbl))
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@ -426,7 +480,7 @@ class OCRPipeline(WorkflowRunner):
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cmd += ' "{}"'.format('" "'.join(poco_paths))
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cmd += ' && '
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cmd += 'cd -'
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deps = 'zip_job_-_all'
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deps = deps + ['zip_job_-_all']
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lbl = 'zip_job_-_poco_{}'.format(i)
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zip_jobs.append(self.addTask(command=cmd, dependencies=deps,
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label=lbl))
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@ -454,11 +508,14 @@ class OCRPipeline(WorkflowRunner):
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cmd += 'mv "{}"/*.bin.png "{}"'.format(input_dir, os.path.join(output_dir, 'bin.png')) # noqa
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cmd += ' && '
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cmd += 'mv "{}"/*.nrm.png "{}"'.format(input_dir, os.path.join(output_dir, 'nrm.png')) # noqa
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deps = ['hocrtotei_job_-_{}'.format(i),
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'pdfunite_job_-_{}'.format(i),
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'cat_job_-_{}'.format(i),
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'tiff_poco_jobs_-_{i}'.format(i),
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'hocr_poco_jobs_-_{i}'.format(i)]
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deps = (hocrtotei_jobs
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+ tesseract_jobs
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+ pdfunite_jobs
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+ cat_jobs
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+ hocr_poco_jobs
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+ tiff_poco_jobs,
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+ compress_jobs
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+ zip_jobs)
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lbl = 'mv_job_-_{}'.format(i)
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mv_jobs.append(self.addTask(command=cmd, dependencies=deps,
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label=lbl))
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@ -466,9 +523,14 @@ class OCRPipeline(WorkflowRunner):
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for i, job in enumerate(self.jobs):
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input_dir = os.path.join(job.output_dir, 'tmp')
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cmd = 'rm -r "{}"'.format(input_dir)
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deps = ['hocrtotei_job_-_{}'.format(i),
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'pdfunite_job_-_{}'.format(i),
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'cat_job_-_{}'.format(i)]
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deps = (hocrtotei_jobs
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+ tesseract_jobs
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+ pdfunite_jobs
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+ cat_jobs
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+ hocr_poco_jobs
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+ tiff_poco_jobs
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+ compress_jobs
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+ zip_jobs)
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lbl = 'mv_job_-_{}'.format(i)
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mv_jobs.append(self.addTask(command=cmd, dependencies=deps,
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label=lbl))
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@ -490,7 +552,8 @@ def main():
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args = parse_args()
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jobs = collect_jobs(args.i, args.o)
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ocr_pipeline = OCRPipeline(args.binarize, jobs, args.keep_intermediates,
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args.language, args.n_cores, args.o, args.zip)
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args.language, args.n_cores, args.o, args.zip,
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args.compress)
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retval = ocr_pipeline.run(dataDirRoot=(args.log_dir or args.o),
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nCores=args.n_cores)
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sys.exit(retval)
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