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Generally, the PDF created by JPG images can not be edited. PDFelement combines multiple JPG images into one PDF and performs OCR on it automatically to make the text editable.
http://www.youtube.com/watch?v=tq8j0cYUVcM [youtube.com]
More you can do with PDFelement:
Edit Text & image on PDF files including OCR;
Create PDFs from Word, Excel, PowerPoint and more;
Convert PDFs to Word, Excel, PowerPoint, HTML, Image and more.