I have a DB with 2,533,228 PDF stored as blobs. Most of those PDFs have
some HQ images, designed to be printed on a 300 or 600 dpi printer. I
would like to download and optimize those PDFs with low quality versions
of the same image and then reload them.
Something like:
List<Long> accountList = select account from statements;
For(Long id : accountList){
Byte[] pdf = select statement from statements where account = id
pdf = optimizePdf(pdf);
update statements set statement = pdf where account = id
}
The obvious trick is the optimizePdf method. I know with Adobe Pro
there is an optimize option that took a 700KB statement down to like
36KB. When I opened the optimized statement, it was obvious the
marketing images where very grainy and that's where most of the
optimization came from. Can you get the images from each page of a pdf
and, if the image is for size X or larger, resize the image and reinsert
it? There could be more than one image on a page, but marketing content
is by far the "largest" in terms of byte size or viewable size.
Any suggestions?
Jason Berk
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