You’ll want to know how to change the DPI of an image in Photoshop so you can print high-quality photos. Here's how to do it.

You can blur any part of a picture after you've taken it using a third-party app for iPhone or Android.

“Our results are especially interesting for applications where one wants high resolution over a relatively large field of view,” Zia says. “This is important at many scales from microscopy to ...