mirror of
https://gitlab.ub.uni-bielefeld.de/sfb1288inf/ocr.git
synced 2024-12-26 04:54:18 +00:00
Add PDF compression
This commit is contained in:
Stephan Porada
parent
b77ca5914f
commit
ec5b4eb521
@ -13,6 +13,7 @@ RUN apt-get update \
|
||||
build-essential \
|
||||
ca-certificates \
|
||||
gnupg2 \
|
||||
ghostscript \
|
||||
imagemagick \
|
||||
poppler-utils \
|
||||
python2.7 \
|
||||
|
||||
151
ocr
151
ocr
@ -24,19 +24,33 @@ TESSERACT_MODELS = ['deu', 'eng', 'enm', 'fra', 'frk', 'frm', 'ita', 'por',
|
||||
|
||||
def parse_args():
|
||||
parser = ArgumentParser(description='OCR Pipeline utilizing tesseract.')
|
||||
parser.add_argument('i')
|
||||
parser.add_argument('o')
|
||||
parser.add_argument('-l', '--language', choices=TESSERACT_MODELS,
|
||||
parser.add_argument('i', help='Input directory for OCR. One PDf equals one\
|
||||
job')
|
||||
parser.add_argument('o', help='Output directory containing OCR results.')
|
||||
parser.add_argument('-l', '--language',
|
||||
choices=TESSERACT_MODELS,
|
||||
required=True)
|
||||
parser.add_argument('--binarize', action='store_true',
|
||||
help='use ocropy binarisation')
|
||||
parser.add_argument('--keep-intermediates', action='store_true',
|
||||
help='keep intermediate files')
|
||||
parser.add_argument('--binarize',
|
||||
action='store_true',
|
||||
help='Use ocropy binarisation as preprocessing step.')
|
||||
parser.add_argument('--keep-intermediates',
|
||||
action='store_true',
|
||||
help='Keep intermediate files for debugging etc.',
|
||||
required=False)
|
||||
parser.add_argument('--n-cores',
|
||||
default=min(4, multiprocessing.cpu_count()),
|
||||
help='total number of cores available', type=int)
|
||||
parser.add_argument('--log-dir')
|
||||
parser.add_argument('--zip')
|
||||
help='Total number of cores available.',
|
||||
type=int,
|
||||
required=False)
|
||||
parser.add_argument('--zip', help='Zips all results in different archives \
|
||||
depending on result types. Also zips \
|
||||
everything into one archive.',
|
||||
required=False)
|
||||
parser.add_argument('-c', '--compress',
|
||||
help='Compress the final PDF result file.',
|
||||
required=False,
|
||||
action='store_true')
|
||||
parser.add_argument('--log_dir')
|
||||
return parser.parse_args()
|
||||
|
||||
|
||||
@ -49,7 +63,7 @@ class OCRPipelineJob:
|
||||
|
||||
class OCRPipeline(WorkflowRunner):
|
||||
def __init__(self, binarize, jobs, keep_intermediates, lang, n_cores,
|
||||
output_dir, zip):
|
||||
output_dir, zip, compress):
|
||||
self.binarize = binarize
|
||||
self.jobs = jobs
|
||||
self.keep_intermediates = keep_intermediates
|
||||
@ -57,6 +71,7 @@ class OCRPipeline(WorkflowRunner):
|
||||
self.n_cores = n_cores
|
||||
self.output_dir = output_dir
|
||||
self.zip = zip
|
||||
self.compress = compress
|
||||
|
||||
def workflow(self):
|
||||
if not self.jobs:
|
||||
@ -103,7 +118,7 @@ class OCRPipeline(WorkflowRunner):
|
||||
cmd += ' -tiff'
|
||||
cmd += ' -tiffcompression lzw'
|
||||
cmd += ' "{}" "{}"'.format(job.file, output_file_base)
|
||||
deps = 'mkdir_job_-_{}'.format(i)
|
||||
deps = mkdir_jobs
|
||||
lbl = 'pdftoppm_job_-_{}'.format(i)
|
||||
pdftoppm_jobs.append(self.addTask(command=cmd, dependencies=deps,
|
||||
label=lbl, nCores=n_cores))
|
||||
@ -137,7 +152,7 @@ class OCRPipeline(WorkflowRunner):
|
||||
cmd = 'ocropus-nlbin "{}"'.format('" "'.join(files))
|
||||
cmd += ' -o "{}"'.format(output_dir)
|
||||
cmd += ' -Q "{}"'.format(n_cores)
|
||||
deps = 'pdftoppm_job_-_{}'.format(i)
|
||||
deps = pdftoppm_jobs
|
||||
lbl = 'ocropus_nlbin_job_-_{}'.format(i)
|
||||
ocropus_nlbin_jobs.append(
|
||||
self.addTask(command=cmd, dependencies=deps, label=lbl,
|
||||
@ -167,7 +182,7 @@ class OCRPipeline(WorkflowRunner):
|
||||
output_file = os.path.join(output_dir, 'page-{}.bin.png'.format(int(file.split('.', 1)[0]))) # noqa
|
||||
cmd = 'mv "{}" "{}"'.format(os.path.join(output_dir, file),
|
||||
output_file)
|
||||
deps = 'ocropus_nlbin_job_-_{}'.format(i)
|
||||
deps = ocropus_nlbin_jobs
|
||||
lbl = 'post_ocropus_nlbin_job_-_{}-{}'.format(i, number)
|
||||
post_ocropus_nlbin_jobs.append(
|
||||
self.addTask(command=cmd, dependencies=deps,
|
||||
@ -207,9 +222,9 @@ class OCRPipeline(WorkflowRunner):
|
||||
cmd += ' -l "{}"'.format(self.lang)
|
||||
cmd += ' hocr pdf txt'
|
||||
if self.binarize:
|
||||
deps = 'post_ocropus_nlbin_job_-_{}-{}'.format(i, number)
|
||||
deps = post_ocropus_nlbin_jobs
|
||||
else:
|
||||
deps = 'pdftoppm_job_-_{}'.format(i)
|
||||
deps = pdftoppm_jobs
|
||||
label = 'tesseract_jobs_-_{}-{}'.format(i, number)
|
||||
tesseract_jobs.append(
|
||||
self.addTask(command=cmd, dependencies=deps, label=label,
|
||||
@ -237,8 +252,7 @@ class OCRPipeline(WorkflowRunner):
|
||||
output_file = os.path.join(job.output_dir,
|
||||
'{}.xml'.format(job.name))
|
||||
cmd = 'hocrtotei "{}" "{}"'.format('" "'.join(files), output_file)
|
||||
deps = filter(lambda x: x.startswith('ocr_job_-_{}'.format(i)),
|
||||
tesseract_jobs)
|
||||
deps = tesseract_jobs
|
||||
lbl = 'hocrtotei_job_-_{}'.format(i)
|
||||
hocrtotei_jobs.append(self.addTask(command=cmd, dependencies=deps,
|
||||
label=lbl))
|
||||
@ -272,8 +286,7 @@ class OCRPipeline(WorkflowRunner):
|
||||
output_path_base = os.path.join(job.output_dir, 'PoCo')
|
||||
output_path = os.path.join(output_path_base, 'hocr')
|
||||
cmd = 'cp "{}" "{}"'.format('" "'.join(files), output_path)
|
||||
deps = filter(lambda x: x.startswith('ocr_job_-_{}'.format(i)),
|
||||
tesseract_jobs)
|
||||
deps = tesseract_jobs
|
||||
lbl = 'hocr_poco_jobs-_{}'.format(i)
|
||||
hocr_poco_jobs.append(self.addTask(command=cmd, dependencies=deps,
|
||||
label=lbl))
|
||||
@ -293,8 +306,7 @@ class OCRPipeline(WorkflowRunner):
|
||||
output_path_base = os.path.join(job.output_dir, 'PoCo')
|
||||
output_path = os.path.join(output_path_base, 'tiff')
|
||||
cmd = 'cp "{}" "{}"'.format('" "'.join(files), output_path)
|
||||
deps = filter(lambda x: x.startswith('ocr_job_-_{}'.format(i)),
|
||||
tesseract_jobs)
|
||||
deps = tesseract_jobs
|
||||
lbl = 'tiff_poco_jobs-_{}'.format(i)
|
||||
tiff_poco_jobs.append(self.addTask(command=cmd, dependencies=deps,
|
||||
label=lbl))
|
||||
@ -313,8 +325,7 @@ class OCRPipeline(WorkflowRunner):
|
||||
output_file = os.path.join(job.output_dir,
|
||||
'{}.pdf'.format(job.name))
|
||||
cmd = 'pdfunite "{}" "{}"'.format('" "'.join(files), output_file)
|
||||
deps = filter(lambda x: x.startswith('ocr_job_-_{}'.format(i)),
|
||||
tesseract_jobs)
|
||||
deps = tesseract_jobs
|
||||
lbl = 'pdfunite_job_-_{}'.format(i)
|
||||
pdfunite_jobs.append(self.addTask(command=cmd, dependencies=deps,
|
||||
label=lbl))
|
||||
@ -333,11 +344,52 @@ class OCRPipeline(WorkflowRunner):
|
||||
output_file = os.path.join(job.output_dir,
|
||||
'{}.txt'.format(job.name))
|
||||
cmd = 'cat "{}" > "{}"'.format('" "'.join(files), output_file)
|
||||
deps = filter(lambda x: x.startswith('ocr_job_-_{}'.format(i)),
|
||||
tesseract_jobs)
|
||||
deps = tesseract_jobs
|
||||
lbl = 'cat_job_-_{}'.format(i)
|
||||
cat_jobs.append(self.addTask(command=cmd, dependencies=deps,
|
||||
label=lbl))
|
||||
'''
|
||||
' The following jobs are created based of the output files of the
|
||||
' pdfunite_jobs. So wait until they are finished.
|
||||
'''
|
||||
self.waitForTasks()
|
||||
|
||||
'''
|
||||
' ##################################################
|
||||
' # compress_jobs #
|
||||
' ##################################################
|
||||
'''
|
||||
compress_jobs = []
|
||||
if self.compress:
|
||||
for i, job in enumerate(self.jobs):
|
||||
print(os.listdir(job.output_dir))
|
||||
file = filter(lambda x: x.endswith('.pdf'),
|
||||
os.listdir(job.output_dir))[0]
|
||||
original_file = os.path.join(job.output_dir, file)
|
||||
compressed_file = os.path.join(job.output_dir, 'c_' + file)
|
||||
cmd = ('gs '
|
||||
+ '-sDEVICE=pdfwrite '
|
||||
+ '-dCompatibilityLevel=1.4 '
|
||||
+ '-dPDFSETTINGS=/ebook '
|
||||
+ '-dNOPAUSE '
|
||||
+ '-dQUIET '
|
||||
+ '-dBATCH '
|
||||
+ '-sOutputFile={o} {i} ').format(o=compressed_file,
|
||||
i=original_file)
|
||||
cmd += '&& rm {original_f} '.format(original_f=original_file)
|
||||
cmd += ('&& mv {compressed_f} '
|
||||
+ '{original_f} ').format(compressed_f=compressed_file,
|
||||
original_f=original_file)
|
||||
deps = (hocrtotei_jobs
|
||||
+ tesseract_jobs
|
||||
+ pdfunite_jobs
|
||||
+ cat_jobs
|
||||
+ hocr_poco_jobs
|
||||
+ tiff_poco_jobs)
|
||||
lbl = 'compress_job_-_{}'.format(i)
|
||||
compress_jobs.append(self.addTask(command=cmd,
|
||||
dependencies=deps,
|
||||
label=lbl))
|
||||
|
||||
'''
|
||||
' ##################################################
|
||||
@ -345,6 +397,13 @@ class OCRPipeline(WorkflowRunner):
|
||||
' ##################################################
|
||||
'''
|
||||
zip_jobs = []
|
||||
deps = (hocrtotei_jobs
|
||||
+ tesseract_jobs
|
||||
+ pdfunite_jobs
|
||||
+ cat_jobs
|
||||
+ hocr_poco_jobs
|
||||
+ tiff_poco_jobs
|
||||
+ compress_jobs)
|
||||
if self.zip is not None:
|
||||
# Remove .zip file extension if provided
|
||||
if self.zip.endswith('.zip'):
|
||||
@ -360,11 +419,6 @@ class OCRPipeline(WorkflowRunner):
|
||||
cmd += ' -i "*.pdf" "*.txt" "*.xml" "*.hocr" "*.tif"'
|
||||
cmd += ' && '
|
||||
cmd += 'cd -'
|
||||
deps = (hocrtotei_jobs
|
||||
+ pdfunite_jobs
|
||||
+ cat_jobs
|
||||
+ hocr_poco_jobs
|
||||
+ tiff_poco_jobs)
|
||||
lbl = 'zip_job_-_all'
|
||||
zip_jobs.append(self.addTask(command=cmd, dependencies=deps,
|
||||
label=lbl))
|
||||
@ -378,7 +432,7 @@ class OCRPipeline(WorkflowRunner):
|
||||
cmd += ' -i "*.pdf"'
|
||||
cmd += ' && '
|
||||
cmd += 'cd -'
|
||||
deps = 'zip_job_-_all'
|
||||
deps = deps + ['zip_job_-_all']
|
||||
lbl = 'zip_job_-_pdf'
|
||||
zip_jobs.append(self.addTask(command=cmd, dependencies=deps,
|
||||
label=lbl))
|
||||
@ -392,7 +446,7 @@ class OCRPipeline(WorkflowRunner):
|
||||
cmd += ' -i "*.txt"'
|
||||
cmd += ' && '
|
||||
cmd += 'cd -'
|
||||
deps = 'zip_job_-_all'
|
||||
deps = deps + ['zip_job_-_all']
|
||||
lbl = 'zip_job_-_txt'
|
||||
zip_jobs.append(self.addTask(command=cmd, dependencies=deps,
|
||||
label=lbl))
|
||||
@ -406,7 +460,7 @@ class OCRPipeline(WorkflowRunner):
|
||||
cmd += ' -i "*.xml"'
|
||||
cmd += ' && '
|
||||
cmd += 'cd -'
|
||||
deps = 'zip_job_-_all'
|
||||
deps = deps + ['zip_job_-_all']
|
||||
lbl = 'zip_job_-_xml'
|
||||
zip_jobs.append(self.addTask(command=cmd, dependencies=deps,
|
||||
label=lbl))
|
||||
@ -426,7 +480,7 @@ class OCRPipeline(WorkflowRunner):
|
||||
cmd += ' "{}"'.format('" "'.join(poco_paths))
|
||||
cmd += ' && '
|
||||
cmd += 'cd -'
|
||||
deps = 'zip_job_-_all'
|
||||
deps = deps + ['zip_job_-_all']
|
||||
lbl = 'zip_job_-_poco_{}'.format(i)
|
||||
zip_jobs.append(self.addTask(command=cmd, dependencies=deps,
|
||||
label=lbl))
|
||||
@ -454,11 +508,14 @@ class OCRPipeline(WorkflowRunner):
|
||||
cmd += 'mv "{}"/*.bin.png "{}"'.format(input_dir, os.path.join(output_dir, 'bin.png')) # noqa
|
||||
cmd += ' && '
|
||||
cmd += 'mv "{}"/*.nrm.png "{}"'.format(input_dir, os.path.join(output_dir, 'nrm.png')) # noqa
|
||||
deps = ['hocrtotei_job_-_{}'.format(i),
|
||||
'pdfunite_job_-_{}'.format(i),
|
||||
'cat_job_-_{}'.format(i),
|
||||
'tiff_poco_jobs_-_{i}'.format(i),
|
||||
'hocr_poco_jobs_-_{i}'.format(i)]
|
||||
deps = (hocrtotei_jobs
|
||||
+ tesseract_jobs
|
||||
+ pdfunite_jobs
|
||||
+ cat_jobs
|
||||
+ hocr_poco_jobs
|
||||
+ tiff_poco_jobs,
|
||||
+ compress_jobs
|
||||
+ zip_jobs)
|
||||
lbl = 'mv_job_-_{}'.format(i)
|
||||
mv_jobs.append(self.addTask(command=cmd, dependencies=deps,
|
||||
label=lbl))
|
||||
@ -466,9 +523,14 @@ class OCRPipeline(WorkflowRunner):
|
||||
for i, job in enumerate(self.jobs):
|
||||
input_dir = os.path.join(job.output_dir, 'tmp')
|
||||
cmd = 'rm -r "{}"'.format(input_dir)
|
||||
deps = ['hocrtotei_job_-_{}'.format(i),
|
||||
'pdfunite_job_-_{}'.format(i),
|
||||
'cat_job_-_{}'.format(i)]
|
||||
deps = (hocrtotei_jobs
|
||||
+ tesseract_jobs
|
||||
+ pdfunite_jobs
|
||||
+ cat_jobs
|
||||
+ hocr_poco_jobs
|
||||
+ tiff_poco_jobs
|
||||
+ compress_jobs
|
||||
+ zip_jobs)
|
||||
lbl = 'mv_job_-_{}'.format(i)
|
||||
mv_jobs.append(self.addTask(command=cmd, dependencies=deps,
|
||||
label=lbl))
|
||||
@ -490,7 +552,8 @@ def main():
|
||||
args = parse_args()
|
||||
jobs = collect_jobs(args.i, args.o)
|
||||
ocr_pipeline = OCRPipeline(args.binarize, jobs, args.keep_intermediates,
|
||||
args.language, args.n_cores, args.o, args.zip)
|
||||
args.language, args.n_cores, args.o, args.zip,
|
||||
args.compress)
|
||||
retval = ocr_pipeline.run(dataDirRoot=(args.log_dir or args.o),
|
||||
nCores=args.n_cores)
|
||||
sys.exit(retval)
|
||||
|
||||
Loading…
Reference in New Issue
Block a user