I have a PDF file that contains only scanned pictures(from academic papers). It has about 90 pages, and is around 6MB. When I open it in a PDF reader, especially on iPad/iPhone, it lags heavily. It usually takes about 3sec to load a page. Even on a PC with SSD, the reading experience is still not perfect.

Is it possible to improve/optimize its loading speed? The scanned page is all black and white, and contains mostly text and math equations. I don't think OCR will work in this case due to the equation.


Adobe Acrobat has optimization for scanned documents, as well as a regular optimization. Down sampling the images and fast web view may help.

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