HDR on the iPhone 4

HDR photography is now available for the iPhone. Currently it is only available for iPhone 4 with ios 4.1

HDR photos are taken by the iPhone 4′s ability to take three photos in quick succession. These three photos are merged in order to create one HDR image. Basically, it does this by taking a dark, normal and brightly lit photo, and blending the three together. It then does some basic tone mapping to create a single photo that shows the best light elements of all three photos. This reduces the usual factors that can ruin photographs from a phone camera, such as dark shadows or areas that are far too bright. When the HDR photo is taken the camera also takes a normal photo, so if you do not like the look of the HDR image you can stick to the normal image.

The iPhone 4 has a 5 megapixel camera, making it sufficient for basic HDR creation. To the left is an example of HDR on iPhone 4. For comparison, the picture on the far left is a normal photo, and on the right a HDR of the same photo!

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