ghostscript

问题 I'm trying to use ghostscript to convert a .ps file to a series of .png files, largely because I don't have a tolerable ps viewer. This is the command I've used: gs -dBATCH -dEPSCrop -dEPSFitPage -sDEVICE=png16m -r300 -dNOPAUSE -sOutputFile=neptune_111115_ob1-2_13pca_boloplots_%d.png neptune_111115_ob1-2_13pca_boloplots.ps (the .ps file is a multi-page postscript). The outputs are partly off the page. I'd like the images to fit inside the page. I can include example files, but they're pretty

问题 I am using GS to do conversion from PDF to JPEG and following is the command that I use: gs -sDEVICE=jpeg -dNOPAUSE -dBATCH -g500x300 -dPDFFitPage -sOutputFile=image.jpg image.pdf In this command as u can see -g500x300 is to set the converted image size (Width x Height). Is there a way to just set the Width without having to input the Height so it will base on the width to scale the height using its original aspect ratio? I know it can be achieved by using ImageMagick convert where you simply

问题 I'm writing an application that faxes a document (many supported types) provided by the end user. A requirement is that the end user can also provide text to be used as part of a custom fax header. I've been using Ghostscript to render PDFs as TIFFs and it's been working great so far, but I have yet to find a straightforward way of overlaying the custom header at the top of a PDF. I've tried out a few recommendations: How can I make a program overlay text on a postscript file? How can I add a

问题 Closed. This question is off-topic. It is not currently accepting answers. Want to improve this question? Update the question so it's on-topic for Stack Overflow. Closed 5 years ago . is there a free C# library ( .dll ) to convert PDF to images ? I tried this one : https://code.google.com/p/lib-pdf/ But it doesn't work, I got this error : Could not load file or assembly 'libpdf.DLL' or one of its dependencies. The specified module could not be found. iTextSharp doesn't implement a function

问题 I want to convert multi page pdfs into single page images efficiently. I already know how to do this one page at a time with imagemagick. For example, convert x.pdf[2] x3.jpg will give me the 3rd page of the pdf as an image. So if I figure out how many pages are in the pdf using identify then I can loop through and convert all pages in the pdf to images. This method can however take a while. For example a 15 page pdf could take anywhere between 15-30 seconds. According to answers that I have

问题 I need to crop a certain section in my PDF file to PNG (this will be automated using Ghostscript with PHP). This is what i do now which basically turns the first page of a PDF to PNG: gs -q -dNOPAUSE -dBATCH \ -sDEVICE=pngalpha -dEPSCrop \ -sOutputFile=output.png input.pdf Specifically, i'm trying to crop this top left card to a PNG. I'm also open for more suggestions on how to accomplish this. 回答1: First, determine the bounding box of your first PDF page: gs \ -q \ -dBATCH \ -dNOPAUSE \

问题 Does anyone know about stamping PDF file to PDF file and also controls for positioning PDF file stamp? I have a file orginal.pdf and logo.pdf . I want to stamp logo.pdf file to file orginal.pdf at the top left of file original.pdf . How can it be done with Ghostscript or pdftk ? 回答1: It can be done with Ghostscript plus pdftk, but it requires at least 2 different steps. AFAIK, you cannot directly control pdftk 's stamp placement. By default it puts the stamp on the center of the page, and at

问题 I seem to be unable to find whether Ghostscript is able to simply detect whether job is color or grayscale. I use Ghostscript for conversion of print jobs to PNG, but I also need to have information about color of the job, so I don't have to search it pixel by pixel again. 回答1: A (relatively new) Ghostscript device called inkcov (you need Ghostscript v9.05 or newer) can reliably detect whether a PDF page uses color or not. It displays the ink coverage for the CMYK inks, separately for each

问题 I'm looking for a Linux command line tool to compare two PDF files and save the diffs to a PDF outfile. The tool should create diff-pdf's in a batch-process. The PDF files are construction plans, so pure text-compare doesn't work. Something like: <tool> file1.pdf file2.pdf -o diff-out.pdf Most of the tools I found convert the PDFs to images and compare them, but only with a GUI. Any other solution is also welcome. 回答1: I've written my own script that does something similar to what you're

问题 I have a few hundred PDFs that I need to crop - I'm willing to either crop the actual documents or simply add a crop box to each so the correct viewable area shows when the PDF is opened. How can I do this using Ghostscript (v8.71)? I found this: gs -sDEVICE=pdfwrite -sOutputFile=marked.pdf [/CropBox [54 54 1314 810] /PAGES pdfmark original.pdf I've tried this (and all variants I can think of) but I always get an error such as this: Error: /undefinedfilename in ([/CropBox) I've tried moving