Image-based PDFs cannot be indexed by search engines such as Google. Documents created with images can be rather large and can be challenging to search. This is typically done by scanning a paper document and importing the scanned image into a PDF document. # 2 Image-based PDF: Image-based PDF documents are created by importing images into a PDF document. However, we might have some complications when there are elements like tables, charts, etc. It is easy to convert text-based PDFs into searchable PDFs by using OCR or software such as Abode Acrobat. #1 Text-based: Text-based PDF documents are PDF documents that contain text only no images, no special fonts or graphics, just plain text that can be read by anyone with a computer and a PDF reader. Note that these techniques are applied based on the type of PDFs we are using therefore before diving into these algorithms and methods, let us discuss the types of PDFs we regularly encounter. Therefore, people rely on different tools and programming frameworks to extract information and then create a search function over PDF using OCR and other programming frameworks. In that case, we can instantly find the invoice without going through each document or line item. Nevertheless, suppose we turn our PDF invoices into searchable PDFs. Most of the images are in scanned formats, and the text may not be in the editable format. If we want to find a particular invoice number, we must go through each invoice and search manually. Searchable PDFsįor example, say we have many invoices from clients. This is especially useful for contracts, scanned forms, receipts, and other documents. Users often want to access the information they are looking for as quickly as possible. It is a great feature to have if you have a long document that you are providing for download. This means that users can jump right to the document section where the term or phrase is located.
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