Quality of pictures within student member list print version

How we can assure a better print result by creating a student member list?
By checking if a better picture is available, if so the original one is used for the printing process.

The print view show a picture of 100px x 100px. From the server we push pictures of up-to 300px x 300px if available. As such the browser must have enough pixels to print something pleasant.

Disclaimer: If the quality of the original picture is terrible the output will not have automatically a better quality.