We continue to report on an issue where some iPhone cameras (or perhaps some iPhone cameras on some occasions -- see below for more) generate a greenish tint on captured photos while others do not, possibly indicating that different component manufacturers are supplying parts for the camera mechanism, resulting in differing quality of the shipping product. (See our previous article for pictures of the problem). Further details have now emerged:
Fixing the problem The issue with green tint is caused by a problem with the iPhone's (or at least some iPhones) auto white balancing. Fortunately, this means that problematic images can be quickly corrected by using the Enhance function in iPhoto for Mac OS X, or the Auto Color option (under Image > Adjustments) in Photoshop. See the image below for an example:
You could also try using a -25 on the tint correction in iPhoto, or adjusting the white balance in Photoshop.
Red center and green tint In addition to the distinct greenish tint sometimes generated by the iPhone's camera, some users are reporting a red hue in the center of captured photos. The following image was sent in by iPhone Atlas reader Dale Klotz who says "This is the same for all lighting: tungsten, daylight, and fluorescent":
Unfortunately, it doesn't look like Auto Color in Photoshop and Enhance in iPhoto are as effective at resolving the image issue depicted above.
Varies from shot-to-shot? It also now appears that this problem may be exhibited on some shots for afflicted iPhones and not on others. One iPhone Atlas reader writs:
"I have, in identical lighting conditions outdoors, had shots with decent skin tones, then, have the next shot, have a green shift.Â It is as if the auto-exposure is also acting as a color balance, in the manner of many video cameras."