How to remove only text from a page
Printed From: Debenu Quick PDF Library - PDF SDK Community Forum
Category: For Users of the Library
Forum Name: I need help - I can help
Forum Description: Problems and solutions while programming with the Debenu Quick PDF Library and Debenu PDF Viewer SDK
URL: http://www.quickpdf.org/forum/forum_posts.asp?TID=3825
Printed Date: 31 Oct 25 at 10:40AM
Software Version: Web Wiz Forums 11.01 - http://www.webwizforums.com
Topic: How to remove only text from a page
Posted By: aderg
Subject: How to remove only text from a page
Date Posted: 15 Jul 20 at 7:41PM
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How to remove only text from the page so that the graphics remain? If I use DeleteContentStream, I get a blank page..
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Replies:
Posted By: Ingo
Date Posted: 15 Jul 20 at 7:52PM
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Hi aderg, no real solution for this. With extract functionality you can try to determine the area where the text blocks are... With draw functionality you can overwrite these areas with white colour for example. Perhaps it's better to do it the other way round extracting the things you want to have onto new blank pages... ------------- Cheers, Ingo |
Posted By: aderg
Date Posted: 15 Jul 20 at 8:10PM
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"you can overwrite these areas with white colour" - it’s not good if the text was drawn over the picture "extracting the things you want to have onto new blank pages" - this only works with bitmaps, but how to extract vector graphics?
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Posted By: Ingo
Date Posted: 16 Jul 20 at 3:22PM
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that are easy steps you can do for similar results. Not a good solution that's true ;-) There isn't any built-in-function for your needs. You have to read the online reference and the developer guide and develope your own solution with a little help by QuickPDF ;-) ------------- Cheers, Ingo |
Posted By: aderg
Date Posted: 16 Jul 20 at 3:29PM
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Thanks, I read the developer guide :) But I did not find the ability to delete text, as well as the ability to copy all content without text.. |
Posted By: Ingo
Date Posted: 16 Jul 20 at 10:59PM
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Now you know the reason - there isn't any special direct functionality ;-) ------------- Cheers, Ingo |
Posted By: dicmmooee
Date Posted: 02 Sep 20 at 1:43AM
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Dear sir， Could you please give a sample to draw functionality you can overwrite these areas with white colour above certain text. High appreciation for your support! |
Posted By: tfrost
Date Posted: 02 Sep 20 at 2:07PM
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There is a sample of using GetPageText to get the position of each text item here at: http://quickpdf.org/forum/extracting-text-by-csv-coordinates_topic3805_post15214.html Then for each text item you can draw a filled box over it with SetFillColor and DrawBox Check the Reference Guide for the options for these functions. |
Posted By: Sopracenery
Date Posted: 02 Sep 20 at 7:46PM
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Hi, If there is no built-in solution nor a better suggestion for this and you REALLY want to have the job done, you can try to eliminate each character in the content stream. Usually text looks like this: (HELLO WORLD) or like this: (H) 2.342 (E) 2.122 (L) 2.214 (L) 2.434 (O) 9.342 (W) 2.12 (O) 2.21 (R) 2.34 (L) 2.12 (D) Now you can try to replace all (H)s and (E)s and so on with one space in brackets "( )" and each full word found by text extraction with spaces without brackets: Select a ContentStream and call DebenuPDFLibrary1811.ReplaceTag("HELLO", " ") DebenuPDFLibrary1811.ReplaceTag("WORLD", " ") DebenuPDFLibrary1811.ReplaceTag("(H)", "( )") DebenuPDFLibrary1811.ReplaceTag("(E)", "( )") and repeat it with the complete alphabet. Please check if your graphs are affected. No warranty! Feedback appreciated Martin |
Posted By: dicmmooee2
Date Posted: 09 Sep 20 at 4:38PM
| Thanks for your useful reply! Good luck! |
Posted By: mandriospo
Date Posted: 05 Apr 23 at 11:54AM
how to check if stream looks this way?
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Sopracenery wrote:Posted By: Ingo
Date Posted: 05 Apr 23 at 7:51PM
Mostly this won't work. Try to open a pdf with notepad and browse through the content. Most content you'll not be able to read few content you will be able and this will give you an idea what's possible and what not. ------------- Cheers, Ingo |