Hi,
Consider that a photo or image has 2 factors: canvas size and picture size normally both factor are equal. In HD the picture and canvas are 1920 x 1080 pixels at 72 dpi.
What is DPI (dots per inch) more dpi more quality in but the quality can cause problem as example computer screen can use 72, 96 or 120 dpi. but to print a high quality on common printer you need at least 150 dpi or 300 or 600.
You cannot use a 300 dpi and reduce to 72 and after go to 300.
What you can do?
Your screen is 1920 x 1080 a full screen picture can be reduced or fit to1920 at 120 dpi.
A PIP picture may be 50% of the height 540 pixel can be reduced to 540 at 120 dpi.
Use PhotoShop or any good drawing program to rescale your picture or photos.
Regards,
YR
