Scanning+and+resolution

**When scanning images, how do I calculate the correct file size?**
If you are scanning for a monitor (i.e. a web site or a TV screen), the industry-standard resolution is **75 PPI**. When scanning an image to post to Cobra, blogs, or other forums, consider that most web sites are optimized for 1024x768. Therefore, your image should be no wider than **1000 pixels** (height is usually not an issue since people are used to scrolling vertically).

If you are scanning for print, the resolution will depend on the quality of the printer. The industry has standardized to two resolutions:
 * Laser or newspaper reproduction = **150 PPI**
 * Inkjet or professional offset printing = **300 PPI**

PPI = Pixels Per Inch Note: PPI and DPI (dots per inch) usually mean exactly the same thing and can be used interchangeably

The above formulas are based on the theory that you need twice as many pixels to render a good halftone line screen.