If DjVu document has color images, then they'll be usually placed on background layer in this case user can take advantage of tools like ddjvu (extract only background layer) and imagemagick (auto-crop) to output just images instead whole canvas, but it can't be automated for creating PDF outputĪnother saner, but slower approach is use of regular OCR GUI tools. Lengthy comments below discuss representing smaller images from DjVu document page as separate objects, which is not easily possible because DjVu document page is itself just a single image with optional text layer, with no "information" about smaller images as separate objects. Do this for all possible file types you want, eg xls xlsx xlsm xlst. Solve it by, from the file explorer, right click the file, select Open With, Select Excel Program and also thick the box 'always use this program to open'. Which is identical to input DjVu file and has text layer inside: Or the file association with excel is incorrect. Thanks text-processing djvu Share Improve this question Follow edited at 9:09 Peter.O 31. Next, open up a File Explorer and drag and drop the DjVuLibre setup. Then this nifty program takes care of everything that's inside this folder (HTML and TIFF files with same base name) and produces output PDF file with some by-products: sample.djvu Consider two different cases: extract without removal of pages from the original djvu file, and extract without removal. The result should be that the djvu files in your Greenstone collection are now. This is where pdfbeads comes in play, and we simple execute: So that we end with these file in out work folder: sample.djvu Now we extract DjVu page to TIFF format with:ĭdjvu -format=tiff -page=10 sample.djvu pg10.tif Sed intervention corrects class names in output hOCR (which is just simple HTML file) After that, you should be able to open File Explorer on Windows. Your Taskbar will disappear for a few seconds before reappearing. In the Processes tab, locate Windows Explorer. We can use djvu2hocr command (from ocrodjvu package) to extract hidden text layer from DjVu file (it doesn't do any OCR or similar, it just extracts text layer with geometry), i.e.:ĭjvu2hocr -p 10 sample.djvu | sed 's/ocrx/ocr/g' > pg10.html Press Ctrl + Shift + Esc on your keyboard to open the Task Manager. pdfbeads, that has it's own requirements which can be found by Google.Here is one way, which would require some not so common tools:
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