title: Image PPI and dimensions
body: <p>Let's say I have an original PNG image 60x60 at 144 PPI (Pixels Per Inch).  I need to have two images at 60x60 (72 DPI) and 120x120 (72 DPI) dimensions.</p>
  
  <p>Since the original image has a 144 PPI, can I make it to 120x120 without seeing any degrading the image quality.  Will the result have the same as making the image at 120x120 at 72 PPI beginning with?</p>