JPEG size when converting into PDF

[Anonymous]

Hi there. I'm trying to make complete book of project in PDF format via PlotMaker. Everything works fine exept size of JPEG files - they get absurdly heavy. File that originaly weights 700kb gets 4,5 mb when converted into PDF.
Is there a way to control this? How to make them smaller without sacrifing the quality? (I need them at least in 100dpi).

Thanks

[Anonymous]

Test #3.1, 3.3, 3.4

[Anonymous]

Not dpi problem, but also compression isn't that we are searching for. The more colors are present in image, the bigger pdf result will be.
On the final pdf result amount of colors has more effect, than compression method. Especially when there is no way to choose any type of compression in publisher (but "Adobe PDF Converter" has 3 different types of color compression).
At the moment I can't understand why the pdf file size in my tests are smaller than original image file size, but in tigr's test there are bigger

[Anonymous]

Z.Bauer

Thanks for your time.

Tigr, how do you put 1600x1000x75dpi rendered image on A3 format layout page? Maybe A2?

"Fit to layout"

I still got 6 times bigger file when publishing into PDF, have no clue why. Thanks anyway for your tests.