def convert(file_name):
try:
orig_file = Path(file_name).resolve()
output_path = Path(f"{file_name.split('.')[0]}_.pdf").resolve()
output_path_temp = Path(f"{file_name.split('.')[0]}__.pdf").resolve()
with Image(filename=str(orig_file), resolution=150) as img:
img.transform_colorspace('gray')
img.linear_stretch(black_point=0.035, white_point=0.1)
img.blur(radius=0, sigma=0.5)
img.noise(noise_type='gaussian', attenuate=0.25)
img.rotate(0.5)
img.save(filename=str(output_path))
cmd_gs = [
'gs', '-dSAFER', '-dBATCH', '-dNOPAUSE', '-dNOCACHE',
'-sDEVICE=pdfwrite',
'-sColorConversionStrategy=LeaveColorUnchanged',
'-dAutoFilterColorImages=true', '-dAutoFilterGrayImages=true',
'-dDownsampleMonoImages=true', '-dDownsampleGrayImages=true',
'-dDownsampleColorImages=true',
f'-sOutputFile={str(output_path_temp)}',
str(output_path)
]
encoding = locale.getpreferredencoding()
cmd_gs = [a.encode(encoding) for a in cmd_gs]
ghostscript.Ghostscript(*cmd_gs)
os.remove(str(output_path_temp))
click.secho("File processed and saved", fg="green")
except Exception as e:
print(e)
def convert_pdf2png(bucket, pdf_blob):
# download the PDF file to a temp file
print("Downloading PDF: {}".format(pdf_blob.name))
_, pdf_file_name = tempfile.mkstemp()
with open(pdf_file_name, "w+b") as pdf_file:
pdf_blob.download_to_file(pdf_file)
# convert the PDF to PNG
print("Converting PDF to PNGs for {}".format(pdf_blob.name))
pdf_prefix = pdf_blob.name.replace(".pdf", "")[:4]
png_tempdir = tempfile.mkdtemp
args = [
"pdf2png", "-dSAFER", "-sDEVICE=pngalpha", "-r100",
"-sOutputFile={}/%03d.png".format(png_tempdir), pdf_file_name
]
encoding = locale.getpreferredencoding()
args = [a.encode(encoding) for a in args]
ghostscript.Ghostscript(*args)
# save the PNGs on GCP
print("Saving PNGs for {}".format(pdf_blob.name))
for f in glob.glob(png_tempdir + "/*"):
png_blob = bucket.blob(pdf_prefix + "-images/" + os.path.split(f)[1])
png_blob.upload_from_filename(f, content_type="image/png")
png_blob.make_public()
os.remove(f)
print("Ended converting PDF to PNGs for {}".format(pdf_blob.name))
os.remove(pdf_file_name)
# merging both main and test_tutorial modules; the trigger function
# would be called in a function
# https://cloud.google.com/functions/docs/tutorials/ocr
def generate_thumbnail_from_pdf(self, document):
"""Generating a thumbnail based on document first file"""
thumbnail_temporary, thumbnail_directory = self.get_thumbnail_path(
document)
# Creating directory for thumbnail if not exists
if not os.path.exists(thumbnail_directory):
os.makedirs(thumbnail_directory)
# Storing temporary PDF file for converting
tmp_pdf = open(thumbnail_temporary, 'w')
tmp_pdf.write(document.get_file_obj().read())
tmp_pdf.close()
args = [
'gs',
'-q', # Quiet
'-dSAFER',
'-sDEVICE=png16m', # Type. PNG used
'-r10', # resolution of the thumbnail
'-dBATCH', # Quit GS after converting
'-dNOPAUSE', # Do not stop on pages
'-dFirstPage=1',
'-dLastPage=1',
'-sOutputFile=%s.png' % thumbnail_temporary, # Destination
'%s' % thumbnail_temporary, # Source
]
ghostscript.Ghostscript(*args)
# Deleting the temp PDF
os.unlink(thumbnail_temporary)
def convert_pdf2png(bucket, pdf_blob):
# download the PDF file to a temp file
print("Downloading PDF: {}".format(pdf_blob.name))
_, pdf_file_name = tempfile.mkstemp()
with open(pdf_file_name, "w+b") as pdf_file:
pdf_blob.download_to_file(pdf_file)
# convert the PDF to PNGs
print("Converting PDF to PNGs for {}".format(pdf_blob.name))
pdf_prefix = pdf_blob.name.replace(".pdf", "")[:4]
png_tempdir = tempfile.mkdtemp()
args = [
"pdf2png",
"-dSAFER",
"-sDEVICE=pngalpha",
"-r100",
"-sOutputFile={}/%03d.png".format(png_tempdir),
pdf_file_name,
]
encoding = locale.getpreferredencoding()
args = [a.encode(encoding) for a in args]
ghostscript.Ghostscript(*args)
# save the PNGs on GCS
print("Saving PNGs for {}".format(pdf_blob.name))
for f in glob.glob(png_tempdir + "/*"):
png_blob = bucket.blob(pdf_prefix + "-images/" + os.path.split(f)[1])
png_blob.upload_from_filename(f, content_type="image/png")
png_blob.make_public()
os.remove(f)
print("Ended converting PDF to PNGs for {}".format(pdf_blob.name))
os.remove(pdf_file_name)
def pdf_to_images(filepath, output_folder):
"""Split a PDF file and make images of the individual pages
:filepath: Path to PDF file
:returns: tuple with output_folder and resulting file count
"""
first_page = "1"
args = [
"-dNOPAUSE", "-dBATCH", "-dJPEGQ=60", "-r200",
"-dFirstPage=" + first_page, "-sDEVICE=jpeg",
"-sOutputFile=" + os.path.join(output_folder, "page_%03d.jpg"),
filepath
]
encoding = locale.getpreferredencoding()
args = [a.encode(encoding) for a in args]
try:
logging.info(args)
ghostscript.Ghostscript(*args)
logging.info(f"PDF file split")
return (output_folder, len(glob.glob(output_folder)))
except Exception as ex:
print(ex)
def print_pdf_put_view(request):
printer = request.params.get("printer") if request.params.get(
"printer") else get_default_printer()
if not request.body:
return Response("Bad Request", status=400)
with tempfile.TemporaryDirectory(suffix="lmu.localprintservice") as dir:
with open(os.path.join(os.path.abspath(dir), "file_to_print.pdf"),
"w+b") as pdf:
pdf.write(request.body)
if sys.platform == "win32":
files_to_print = glob.glob(
os.path.join(os.path.abspath(dir),
"*.pdf"))[0].replace('\\\\', '\\')
import ghostscript
args = [
"-dPrinted", "-dBATCH", "-dNOSAFER", "-dNOPAUSE", "-dNOPROMPT"
"-q", "-dNumCopies#1", "-sDEVICE#mswinpr2",
f'-sOutputFile#"%printer%{printer}"', f'"{files_to_print}"'
]
encoding = locale.getpreferredencoding()
args = [a.encode(encoding) for a in args]
ghostscript.Ghostscript(*args)
else:
files_to_print = glob.glob(
os.path.join(os.path.abspath(dir), "*.pdf"))
import cups
conn = cups.Connection()
conn.printFiles(printer, files_to_print, "Test", options)
request.response.status = 202
request.response.headers.update({
'Access-Control-Allow-Origin': '*',
})
return request.response
def print_pdf(data=None):
data['investigation'] = tuple(json.loads(data['investigation']))
data['advice'] = tuple((json.loads(data['advice'])))
context = {
'data': data,
}
pdf = render_to_pdf('print/slip.html', context)
temp1 = tempfile.mktemp('.pdf')
f1 = open(temp1, 'ab')
f1.write(pdf)
f1.close()
args = [
"-dPrinted", "-dBATCH", "-dNOSAFER", "-dNOPAUSE", "-dNOPROMPT"
"-q", "-dNumCopies#1", "-sDEVICE#mswinpr2",
f'-sOutputFile#"%printer%{win32print.GetDefaultPrinter()}"',
f'"{temp1}"'
]
encoding = locale.getpreferredencoding()
args = [a.encode(encoding) for a in args]
ghostscript.Ghostscript(*args)
return True
def pdf2jpeg(pdf_input_path, jpeg_output_path):
args = [
"pef2jpeg", "-dNOPAUSE", "-sDEVICE=jpeg", "-r144",
"-sOutputFile=" + jpeg_output_path, pdf_input_path
]
encoding = locale.getpreferredencoding()
args = [a.encode(encoding) for a in args]
ghostscript.Ghostscript(*args)
def pdf2jpeg(self, PDFDirectory, JPEGDirectory):
args = [
"pef2jpeg", "-dNOPAUSE", "-sDEVICE=jpeg", "-r144",
"-sOutputFile=" + JPEGDirectory, PDFDirectory
]
encoding = locale.getpreferredencoding()
args = [a.encode(encoding) for a in args]
ghostscript.Ghostscript(*args)
def Slide_Extractor():
files = glob.glob('./media/*')
# print ("REMOVING FILES: ", files)
for f in files:
os.remove(f)
slide_directory = os.listdir('./uploads')
ppt_list = []
for ppt in slide_directory:
if ppt.endswith('.pptx') or ppt.endswith('.ppt'):
ppt_list.append(ppt)
# print (ppt_list)
directory = os.getcwd()
directory = directory + '/uploads'
os.chdir(directory)
for element in ppt_list:
command = os.popen('unoconv -f pdf ' + element)
command.close()
merger = PdfFileMerger()
pdf_directory = os.listdir()
pdf_list = []
for pdf in pdf_directory:
if pdf.endswith('.pdf'):
pdf_list.append(pdf)
merger.append(pdf)
# print (pdf_list)
directory = directory + '/../media'
os.chdir(directory)
# print (os.getcwd())
merger.write("combine.pdf")
args = ["gs", "-q", "-o", "image%d.png", "-sDEVICE=pngalpha", "combine.pdf"]
encoding = locale.getpreferredencoding()
args = [a.encode(encoding) for a in args]
ghostscript.Ghostscript(*args)
image_directory = os.listdir()
image_list = []
for image in image_directory:
if image.endswith('.png'):
image_list.append(image)
# print (image_list)
# print (len(image_list))
directory = directory + '/..'
os.chdir(directory)
# print (os.getcwd())
return (len(image_list))
def pdf2jpeg(pdf_input_path, jpeg_output_path):
args = [
"pdf2jpeg", # actual value doesn't matter
"-dNOPAUSE",
"-sDEVICE=jpeg",
"-r144",
"-sOutputFile=" + jpeg_output_path,
pdf_input_path
]
ghostscript.Ghostscript(*args)
def pdf_printer(self, pdf_input_path):
args = ['pdf_printer',
'-dNOPAUSE',
'-sDEVICE=mswinpr2',
pdf_input_path]
encoding = locale.getpreferredencoding()
args = [a.encode(encoding) for a in args]
ghostscript.Ghostscript(*args)
ghostscript.cleanup()
def load_paper(target_path, target_pdf):
print target_pdf
file_name = target_pdf.split("/")[::-1][0].split(".")[0]
target_directory = PROCESSED_IMG_PATH + "/" + file_name
if not os.path.exists(target_directory): os.mkdir(target_directory)
gs_args = [
"-q", "-dNOPAUSE", "-dBATCH", "-dNOPROMPT", "-dNOSAFER",
"-sDEVICE=png16m", "-sOutputFile=" + target_directory + "/%d.png",
target_path
]
ghostscript.Ghostscript(*gs_args)
images = os.listdir(target_directory)
images = [image for image in images if image.endswith(".png")]
result_image_path = []
for image in images:
result_image_path.append(target_directory + '/' + image)
img = cv2.imread(target_directory + '/' + image, 0)
img_rgb = cv2.cvtColor(img, cv2.COLOR_GRAY2BGR)
try:
top_right = templateMatcher.detectSymbols(img, img_rgb,
TEMPLATE_TOP_RIGHT)
top_left = templateMatcher.detectSymbols(img, img_rgb,
TEMPLATE_TOP_LEFT)
bottom_right = templateMatcher.detectSymbols(
img, img_rgb, TEMPLATE_BOTTOM_RIGHT)
bottom_left = templateMatcher.detectSymbols(
img, img_rgb, TEMPLATE_BOTTOM_LEFT)
corner_symbols = __extract_border_marker(top_right, top_left,
bottom_right, bottom_left)
for symbol in corner_symbols.keys():
coord = corner_symbols[symbol]
w, h = TEMPLATE[symbol].shape[::-1]
cv2.rectangle(img_rgb, tuple(coord),
(coord[0] + w, coord[1] + h), (255, 0, 0), 1)
templateMatcher.removeDetected(img, coord[1], coord[0], w, h)
border_pos = __find_border(img, corner_symbols["top_right"],
corner_symbols["top_left"],
corner_symbols["bottom_right"],
corner_symbols["bottom_left"])
for pos in border_pos:
coord = border_pos[pos]
cv2.rectangle(img_rgb, tuple(coord),
(coord[0] + 1, coord[1] + 1), (0, 255, 0), 1)
except Exception:
continue
cv2.imwrite(target_directory + '/' + image, img)
return result_image_path
def ai2jpegGs(pdf_input_path, jpeg_output_path):
args = ["pdf2jpeg", # actual value doesn't matter
"-dNOPAUSE",
"-sDEVICE=jpeg",
"-r144",
"-sOutputFile=" + jpeg_output_path,
pdf_input_path]
encoding = locale.getpreferredencoding()
args = [a.encode(encoding) for a in args]
ghostscript.Ghostscript(*args)
def pdf_to_jpg(pdf_input_path, jpeg_name):
args = [
"pdf2jpeg", # actual value doesn't matter
"-dNOPAUSE",
"-sDEVICE=jpeg",
"-r300",
f'-sOutputFile={jpeg_name}-%03d.jpg',
pdf_input_path
]
encoding = locale.getpreferredencoding()
args = [a.encode(encoding) for a in args]
with ghostscript.Ghostscript(*args) as g:
ghostscript.cleanup()
def pdf2jpeg(pdf_input_path, jpeg_output_path):
gs_call = "-q -sDEVICE=png16m -o {} -r300 {}".format(
jpeg_output_path, pdf_input_path
)
gs_call = (
"-dNumRenderingThreads=8 -dBufferSpace=2000000000 -dBandBufferSpace=500000000"
+ gs_call
)
print(gs_call)
gs_call = gs_call.encode().split()
ghostscript.Ghostscript(*gs_call)
def change_format_and_ocr(pdf_input_path, filename):
jpeg_output_path = filename+".jpeg"
args = ["pdf2jpeg", # actual value doesn't matter
"-dNOPAUSE",
"-sDEVICE=jpeg",
"-r144",
"-sOutputFile=" + jpeg_output_path,
pdf_input_path]
encoding = locale.getpreferredencoding()
args = [a.encode(encoding) for a in args]
ghostscript.Ghostscript(*args)
return image_to_text(jpeg_output_path)
def pdf2jpeg(pdf_input_path, output_path):
args = [
"pdf2jpeg", # actual value doesn't matter
"-dNOPAUSE",
"-sDEVICE=png16m", # png 24 bit rgb color
"-r200", # input rendering 200 dpi
"-dDownScaleFactor=1", # make .png file 200 dpi as well
"-sOutputFile=" + output_path,
pdf_input_path
]
# arguments have to be bytes, encode them
encoding = locale.getpreferredencoding()
args = [a.encode(encoding) for a in args]
ghostscript.Ghostscript(*args)
def pdf2jpeg(pdf_input_path, jpeg_output_path):
args = ["gs", # actual value doesn't matter
"-dNOPAUSE",
"-dBATCH",
"-sDEVICE=png16m",
"-r144",
"-dPDFFitPage",
# "-dFirstPage=" + page,
# "-dLastPage=" + page,
"-sOutputFile=" + jpeg_output_path,
pdf_input_path]
encoding = locale.getpreferredencoding()
args = [a.encode(encoding) for a in args]
ghostscript.Ghostscript(*args)
def convert_to_image(self):
"""
Convert the PDF to tiff image.
:return: self (allows chaining of methods, since the methods do not return any additional info).
"""
if os.path.exists(self.pdf_file_spec):
start_conversion = perf_counter()
args = [
"pdf2tiff",
"-dNOPAUSE",
"-dSAFER",
"-dBATCH",
f"-dNumRenderingThreads={self.threads}",
f"-q",
f"-sDEVICE={self.IMAGE_FORMAT}",
f"-r{self.dpi}",
f"-sOutputFile={os.path.abspath(f'{self.output_file}-%00d.{self.extension}')}",
f"{self.pdf_file_spec}",
]
encoding = locale.getpreferredencoding()
args = [a.encode(encoding) for a in args]
# Convert the PDF to the TIFF (Need to clean up instance after execution,
# to allow conversion of additional documents)
try:
gs_apis = ghostscript.Ghostscript(*args)
gs_apis.exit()
ghostscript.cleanup()
except Exception as exc:
print(f"\tERROR ({self.name}): Exception: {exc}")
# Measure time to convert the PDF to image files.
self.conversion_duration = perf_counter() - start_conversion
print(
f"{self.name}: Conversion took: {self.conversion_duration:0.4f} seconds."
)
# Specified PDF was not found.
else:
print(f"{self.name}: Unable to find '{self.pdf_file_spec}'")
return self
def pdf2png(pdf_input_path, png_output_path):
"""
This function is used to transform PDF into PNG.
:param pdf_input_path: the PDF file
:param png_output_path: the PNG file
:type pdf_input_path: FileObject
:type png_output_path: FileObject
:returns: the convertion of the PDF into PNG
:rtype: FileObject
"""
args = ["pdf2png", # actual value doesn't matter
"-dNOPAUSE",
"-sDEVICE=png",
"-r144",
"-sOutputFile=" + png_output_path,
pdf_input_path]
ghostscript.Ghostscript(*args)
def pdf2jpeg(self, pdf_list):
import ghostscript
import os
for file in pdf_list:
basename = file.split(".")[0]
print basename
print os.path.join(self.temp_dir, basename + "%03d.jpeg")
args = [
"pdf2jpeg", # actual value doesn't matter
"-dNOPAUSE",
"-sDEVICE=jpeg",
"-r144",
"-sOutputFile=" +
os.path.join(self.temp_dir, basename +
"%03d.jpeg"), #%03.d will increment the file name
os.path.join(self.dir_path, file)
]
ghostscript.Ghostscript(*args)
def main():
'''This is the method'''
for file in files_in_directory: #for each file in list
input_doc = directory_in_str + '/' + file #set the input path
print(input_doc)
output_doc = directory_in_str + '/' + file + '.jpg' #set the output path
args = [
"gs", # actual value doesn't matter
"-dNOPAUSE",
"-sDEVICE=jpeg",
"-r144",
"-sOutputFile=" + output_doc,
input_doc
]
ghostscript.Ghostscript(*args)
def pdf2png(self, pdf_input_path, png_output_path):
args = [
"pdf2png", # actual value doesn't matter
"-dNOPAUSE",
"-sDEVICE=pngmono",
"-r300",
"-sOutputFile=" + png_output_path,
pdf_input_path
]
encoding = locale.getpreferredencoding()
args = [a.encode(encoding) for a in args]
try:
ghostscript.Ghostscript(*args)
ghostscript.cleanup()
except:
print("Erro", ghostscript.GhostscriptError)
def convert(self, pdf_path, png_path, resolution=300):
if not self.installed():
raise OSError(
"Ghostscript is not installed. You can install it using the instructions"
" here: https://camelot-py.readthedocs.io/en/master/user/install-deps.html"
)
import ghostscript
gs_command = [
"gs",
"-q",
"-sDEVICE=png16m",
"-o",
png_path,
f"-r{resolution}",
pdf_path,
]
ghostscript.Ghostscript(*gs_command)
def start(self, source_path, output_path):
if ".pdf" not in source_path:
return
if (os.path.exists(output_path)):
shutil.rmtree(output_path)
os.makedirs(output_path)
args = [
'pdf2jpeg', '-dNOPAUSE', '-dBATCH', '-dSAFER', '-sDEVICE=png16m',
'-r50x50', '-sOutputFile=' + output_path + '/page-%03d.jpg',
source_path
]
encoding = locale.getpreferredencoding()
args = [a.encode(encoding) for a in args]
ghostscript.Ghostscript(*args)
def _run_ghostscript(obj, device, outfile, pages=(1, 1)):
# An empty file is apparently a valid file as far as ghostscript is
# concerned. However, it produces an empty image file, which causes
# errors downline. Detect an empty file and raise here.
if not obj.src.size:
raise Exception('Invalid file size 0')
args = [
b'-dNOPAUSE',
b'-dBATCH',
b'-dSAFER',
b'-sDEVICE=%s' % bytes(device, 'utf8'),
]
if pages != (0, 0):
args.extend(
[b'-dFirstPage=%i' % pages[0],
b'-dLastPage=%i' % pages[1]])
# Calculate suitable DPI...
dpi = _calc_dpi(obj.width, obj.height)
LOGGER.debug('Converting PDF to image with DPI of %ix%i', *dpi)
args.extend([
b'-r%ix%i' % dpi,
b'-o',
bytes(outfile, 'utf8'),
bytes(obj.src.path, 'utf8'),
])
LOGGER.debug('Ghostscript args: %s', args)
# TODO: fix this lib. You cannot clean up the object with try / except if
# __init__() raises.
output = BytesIO()
with ghostscript.Ghostscript(stdout=output, stderr=output, *args):
pass
# Checkout output for errors that require special handling.
output = output.getvalue()
if pages != (0, 0) and (b'FirstPage' in output or b'LastPage' in output):
raise InvalidPageError(pages)
def pdf2jpeg(self, pdf_input_path, jpeg_output_path):
args = [
"gs", # actual value doesn't matter
"--permit-file-read=" + os.path.dirname(pdf_input_path),
"--permit-file-write=" + jpeg_output_path,
"-dNOPAUSE",
#"-dBATCH",
"-sDEVICE=jpeg",
"-dTextAlphaBits=4",
"-r300",
#"-sOutputFile=" + jpeg_output_path,
"-o a%03d.jpg",
pdf_input_path
]
encoding = locale.getpreferredencoding()
args = [a.encode(encoding) for a in args]
with ghostscript.Ghostscript(*args) as g:
ghostscript.cleanup()
def resave_pdf(self):
if 0:
quality = {
0: '/default',
1: '/prepress',
2: '/printer',
3: '/ebook',
4: '/screen'
}
args = ['gs', '-sDEVICE=pdfwrite',
'-dCompatibilityLevel=1.4',
'-dPDFSETTINGS={}'.format(quality[0]),
'-dNOPAUSE',
'-dQUIET',
'-dBATCH',
'-dColorAccuracy=2',
'-dProcessColorModel=/DeviceRGB',
'-sOutputFile={}'.format(self.abs_output_filename),
self.abs_tmp_output_filename]
# '-sDefaultRGBProfile=sRGB_v4_ICC_preference.icc',
# '-sOutputICCProfile=sRGB_v4_ICC_preference.icc',
# '-sImageICCProfile=sRGB_v4_ICC_preference.icc',
# Using python ghostscript module
encoding = locale.getpreferredencoding()
args = [a.encode(encoding) for a in args]
ghostscript.Ghostscript(*args)
# Calling ghoscript directly
# subprocess.call(args)
# Remove original file, called tmp.pdf
if os.path.exists(self.abs_tmp_output_filename):
os.remove(self.abs_tmp_output_filename)
else:
os.rename(self.abs_tmp_output_filename, self.abs_output_filename)
self.message_on_header_widget("Created ({:.1f}MB)!".format(
getsize(self.abs_output_filename) / 1000000.))
self.message_on_detail_widget("Drag another folder to create a new one.")
def catalogue_to_txt_files(txt_filename_template, pdf_filename) -> None:
"""
Parse the entire catalogue into text files (one for each page) using GhostScript:
Note the %d which means each page becomes a different txt file
:param:
:return:
"""
args = list(
map(
lambda s: s.encode(), # args need to be encoded into bytes
[
"gs", # name of the command
"-sDEVICE=txtwrite", # job type - writing to txt files
"-o" + txt_filename_template, # output filename template
os.path.join(Paths.PDF_PATH,
pdf_filename), # input filename
]))
# with suppress_stdout():
ghostscript.Ghostscript(*args)
