If you just want to OCR a PDF file, you can use a program that is well-maintained and already packaged, namely ocrmypdf. You can, then, perform any surgery that you see fit with tools like scantailor or whatever you like. To extract it with pdfinfo: pdfinfo file.pdf grep Producer. About the second part of your question: Mac OS X 10.10.2 Quartz PDFContext is not an encoding but the producer. Prefix-002.png prefix-049.png prefix-096.png prefix-143.png The tool you mention pdfinfo is available on OS X, for example by installing MacPorts and then. The files will be created inside the directory imgs with names starting with prefix, as in: $ ls At most one of these five options may be used. The Info dictionary and related data listed above is not printed. The options -listenc, -meta, -js, -struct, and -struct-text only print the requested information. You can use something like the following (assuming you have created a directory named imgs where you will put your images): pdfimages -png Faraway-PRA.pdf imgs/prefix Pdfinfo prints the contents of the Info dictionary (plus some other useful information) from a Portable Document Format (PDF) file. The real actionĪfter that, you can simply extract the images with pdfimages itself or use pdftoppm (also from poppler-utils) to render entire pages in many formats that you may like (e.g., tiff, for scanning with tesseract). Note: The file deptest.pdf used above is available from pdfsizeopt's repository. It also lists the format in which the images are stored in the PDF, which is cool (sometimes, it is JBIG2, sometimes JPEG2000 etc.) Notice the x-ppi and y-ppi at the listing above. Page num type width height color comp bpc enc interp object ID x-ppi y-ppi size ratioġ 0 image 100 100 gray 1 1 image no 9 0 53 53 169B 14%Ģ 1 image 100 100 gray 1 1 ccitt no 53 53 698B 56% 99 Other error.Since I am interested in the same kind of job (though not necessarily to OCR the PDF files, but to convert them to DjVu and then OCR them), I found this question and the responses lacking (since I needed to guess the DPI of the images with the number of pixels and then use the size as output by pdfinfo or other tricks-not to mention that the images inside a PDF may have different densities etc.).Īfter a lot of research more, I found that you can use pdfimages (from package poppler-utils) like the following: $ pdfimages -list deptest.pdf h Print usage information.Īre equivalent.) EXIT CODESThe Xpdf tools use the following exit codes: 0 No error. v Print copyright and version information. upw password Specify the user password for the PDF file. Providing this willīypass all security restrictions. listenc Lits the available encodings -opw password Specify the owner password for the PDF file. enc encoding-name Sets the encoding to use for text output. If a page range is specified using "-f" and "-l", onlyĭestinations in the page range are listed. dests Print a list of all named destinations. rawdates Prints the raw (undecoded) date strings, directly from the PDF file. isodates Prints dates in ISO-8601 format (including the time zone). pdfinfo does not attempt to extract strings Note: only URLs referenced by the PDF objects Only the URL types supported by Poppler are listed.Ĭurrently, this is limited to Annotations. struct.) -url Print all URLs in the PDF. Note that extracting text this way might be slow for big PDF files. struct-text Print the textual content along with the document structure of a Tagged-PDFįile. struct Prints the logical document structure of a Tagged-PDF file. The PDF file's Catalog object.) -custom Prints custom and standard metadata. box Prints the page box bounding boxes: MediaBox, CropBox, BleedBox, l number Specifies the last page to examine. Optionally, the bounding boxes for each requested page) are printed. Using the "-f" and "-l" options, the size of each requested page (and, OPTIONS -f number Specifies the first page to examine. The 'Info' dictionary and related data listed above is not printed. In addition, the following information is printed:Ĭustom metadata (yes/no) metadata stream (yes/no) tagged (yes/no) userproperties (yes/no) suspects (yes/no) form (AcroForm / XFA / none) javascript (yes/no) page count encrypted flag (yes/no) print and copy permissions (if encrypted) page size file size linearized (yes/no) PDF version metadata (only if requested) Title subject keywords author creator producer creation date modification date The 'Info' dictionary contains the following values: How To Easily Convert a Word Document To Pdf Online in 2023
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