Reduce file size of image a user loads into image field in form

Hello,

I'm a Mediadesigner from Germany and I started to work with Lifcycle Designer about a year ago.

I already made some smaller forms with different fields.

Now I have a special form with empty image fields, that allow the user to put in his images.

For the form goes out to so many different people, some of them just take the images as they are, load them into the form and so the filesize of the pdf grows. For your information: the filled out pdf will be sent back to us by e-mail.

So here is my question: is it possible to reduce the filesize of that images when it is loaded into the fild or when the filled in form is saved.

For example that I can say: "Take all images and make them 72dpi and max. height 500px"?

Thanks for your help in advance!

Carola