Free Trial

Safari Books Online is a digital library providing on-demand subscription access to thousands of learning resources.

  • Create BookmarkCreate Bookmark
  • Create Note or TagCreate Note or Tag
  • PrintPrint
Share this Page URL
Help

3. Resolution and Scanning > Talking about resolution: SPI, DPI, PPI, and absol...

Talking about resolution: SPI, DPI, PPI, and absolute pixels

Checking image size

You can check the absolute size of a digital image easily in Windows Explorer, or Mac OS X. Just right click on the image file and choose Properties in Windows or Get Info in Mac OS X. In the Details tab you will find the absolute image dimensions. Since a digital image has two dimensions, you will see one pixel value for width and one value for height, e.g., 3008 x 2000 pixels. You will find information about the relative image resolution (e.g., 300 dpi) there as well. But information about the resulting output size from these parameters is missing. The image size information in Photoshop is better, because you can see that a digital image of 3008 x 2000 pixels at 300 dpi will have an output size of 10.027″ x 6.67″.


  

You are currently reading a PREVIEW of this book.

                                                                                                                    

Get instant access to over $1 million worth of books and videos.

  

Start a Free Trial


  
  • Safari Books Online
  • Create BookmarkCreate Bookmark
  • Create Note or TagCreate Note or Tag
  • PrintPrint