[amiroo]

Hi Willus
I have a kindle paperwhite 2 that you know the same as other readers has problem with A4 pdfs that your valuable software solved it. But kindle paperwhite 2 in comparison with Kindle keyboard has two other problems for SCANNED pdfs.
First it doesn't show some letters of a word in different location of a page. I specifically speak about Persian books but as the are scanned and seen as image I think language is not a matter. By your software this problem solved completely. Thanks

But there is another problem that the quality of a scanned pdf book in Paperwhite is much lower than Kindle keyboard in spite the resolution in Paperwhite is much higher. (212 DPI for Paperwhite and 167 for DPI for keyboard). So it is not a matter of screen resolution. In other words in Kindle Keyboard the edge of fonts are smoother with more quality. (see attached pic and I hope by zooming it you can see the difference)

The k2pdfopt didn't recover this problem (as far as I know and use default options of software and even by increasing resolution) and I suppose maybe this is not the aim of your software and the problem is due to bad software of Kindle Paperwhite!
I think based on your experience maybe you have a remedy or solution for this as I have investigated a lot but no one can give a clear answer even Amazon staffs.
I appreciate any guide on this and again appreciate you for your valuable software.
Cheers