pdf

问题 I have a jpeg scanned page ( toto.jpg ) that I want to convert to a A4 pdf file with imagemagick convert command. I've been trying the -page A4 , -resize 595x842 and -define pdf:fit-page=A4 options but it does not work, I don't obtain the correct size : $ identify toto.jpg toto.jpg JPEG 1644x2304 1644x2304+0+0 8-bit DirectClass 902KB 0.000u 0:00.000 $ convert -density 300 -page a4 toto.jpg toto.pdf $ identify toto.pdf toto.pdf PDF 143x202 143x202+0+0 16-bit Bilevel DirectClass 3.7KB 0.000u 0

问题 I'm trying to extract text from a PDF (https://www.sec.gov/litigation/admin/2015/34-76574.pdf) using PyPDF2, and the only result I'm getting is the following string: b'' Here is my code: import PyPDF2 import urllib.request import io url = 'https://www.sec.gov/litigation/admin/2015/34-76574.pdf' remote_file = urllib.request.urlopen(url).read() memory_file = io.BytesIO(remote_file) read_pdf = PyPDF2.PdfFileReader(memory_file) number_of_pages = read_pdf.getNumPages() page = read_pdf.getPage(1)

问题 I'm trying to extract text from a PDF (https://www.sec.gov/litigation/admin/2015/34-76574.pdf) using PyPDF2, and the only result I'm getting is the following string: b'' Here is my code: import PyPDF2 import urllib.request import io url = 'https://www.sec.gov/litigation/admin/2015/34-76574.pdf' remote_file = urllib.request.urlopen(url).read() memory_file = io.BytesIO(remote_file) read_pdf = PyPDF2.PdfFileReader(memory_file) number_of_pages = read_pdf.getNumPages() page = read_pdf.getPage(1)

问题 I'm using inkscape to produce vector figures, save them in SVG format to export them later as "PDF + Latex" much in the vein of TUG inkscape+pdflatex guide. Trying to produce a simple figure, however, turns out to be extremely frustating. The first figure http://i.stack.imgur.com/jIo3z.png is an example of the figure I would like to export in the form of "PDF + Latex" (shown here in PNG format). If I export this to a PDF figure without latex macros the PDF produced looks exactly the same,

问题 I'm using inkscape to produce vector figures, save them in SVG format to export them later as "PDF + Latex" much in the vein of TUG inkscape+pdflatex guide. Trying to produce a simple figure, however, turns out to be extremely frustating. The first figure http://i.stack.imgur.com/jIo3z.png is an example of the figure I would like to export in the form of "PDF + Latex" (shown here in PNG format). If I export this to a PDF figure without latex macros the PDF produced looks exactly the same,

问题 I have myfile.ps with a vector image included. But when I run ps2pdf myfile.ps it seems that the output page size is A4: the vector image is too large and become cut away, so about one inch is lost. The following pseudo-header is printed in the output PDF file, in addition to the original vector image: PLOT SIZE:8.02x8.62Inches Magnification:7354.21X Is there any option or any way to convert the PS file to a PDF preserving the original paper size? 回答1: I doubt your quoted 2 lines are really

问题 I have a CSV with a list of URLs with PDFs: Some of these PDFs are searchable. Some of these PDFS aren't searchable. I want to determine which PDFs are searchable from my list of PDFs. Is there an easy way to do this? 回答1: On the commandline, I'd use pdffonts to determine which fonts the file uses. This runs rather fast as well... Example 1: PDF containing text pdffonts bash-manpage.pdf name type encoding emb sub uni object ID ------------------------------- ------------- --------------- ---

问题 I am coming back with a new question which I am unable to answer, having scratched my head the whole day on it. I want to generate a PDF from a webpage by clicking on a "Download PDF" button. I tried several modules including Reportlab and XHTML2PDF but I am not able to generate any pdf nor downloading it... Here is what I did with Reportlab, following Render HTML to PDF in Django site - - views.py - - import cStringIO as StringIO import ho.pisa as pisa from django.template.loader import get

问题 I have a CSV with a list of URLs with PDFs: Some of these PDFs are searchable. Some of these PDFS aren't searchable. I want to determine which PDFs are searchable from my list of PDFs. Is there an easy way to do this? 回答1: On the commandline, I'd use pdffonts to determine which fonts the file uses. This runs rather fast as well... Example 1: PDF containing text pdffonts bash-manpage.pdf name type encoding emb sub uni object ID ------------------------------- ------------- --------------- ---

问题 I have a CSV with a list of URLs with PDFs: Some of these PDFs are searchable. Some of these PDFS aren't searchable. I want to determine which PDFs are searchable from my list of PDFs. Is there an easy way to do this? 回答1: On the commandline, I'd use pdffonts to determine which fonts the file uses. This runs rather fast as well... Example 1: PDF containing text pdffonts bash-manpage.pdf name type encoding emb sub uni object ID ------------------------------- ------------- --------------- ---