I was going through the Flickr Photo sharing site, I wanted to save some image but it was restricting to do that. I experimented with the coding of that page and developed a method to save that image in its original high resolution that it  its full scale image. You can also follow these to get your desired image.
Follow these steps :

• View the image
  
• Press Ctrl+U (to view source code of the page)
  
• Press Ctrl+F (To find )
  
• Type og:image in the 'Find' box and press enter.
  
• Find the JPEG image link written next to og:image
  
• Copy that link of JPEG
  
• Paste that link in New Tab
  
• In the link, just before .JPEG,  replace z with b. (see in the photo on my post ).
  
• Now press enter to open that modified link.
  
• Save the image. Its in original high resolution.