of the image: an underexposed version, a normally exposed version, and an overexposed version. Then it combines these three images into one to increase the dynamic range (the intensity of the light) to give you a more accurate representation of the scene you’re shooting.

In iOS 4.1, when you launch your camera there will be an option to toggle HDR on or off. When toggled on, the iPhone will take a few seconds to process a photo in HDR after snapping it. By default, your iPhone will save both a normal, unedited version of your photograph along with an HDR-processed version. (You can tweak the save mode in your settings.)

I ventured outside with Wired.com photo editor Jon Snyder to put an iPhone 4 to the test with HDR photos, and the results were quite pleasing. At times some photos looked better without HDR-processing, but for the most part HDR improved images that were oversaturated with light or too dark with shadows. This feature should come in handy for people who don’t want to spend too much aiming their camera in just the right place to get good lighting. Click through the gallery above to see some side-by-side comparisons of photos we snapped Thursday afternoon in San Francisco.

See Also:

• Apple Announces New Versions of iOS
• Live Blog: Apple’s iPod, Music Event
• Hands-On With New Apple iPods
• The iPhone 4 Takes Gorgeous Fireworks Photos and Videos

Authors: Brian X. Chen

to know more click here