If you've ever used any high-end Lumia handset from Nokia, you'd be well familiar with how much engineering ingenuity and mastery is poured into ever camera lens. From the Lumia 920's impressive optical image stabilization system, to the Lumia 925's sixth element lens, and the Lumia 1020's 41-megapixel lens, Nokia has established itself as a leader in imaging. But there's always room for improvement, and a recent patent filing shows that Nokia aims to eliminate a common problem found in photos taken with an optically-stabilized lens.
The issue is called lens shading, which could result in photos that, "may be brighter in the sensor and decrease in brightness when approaching the edges of the sensor array", according to Nokia's filing. From what we understand from the description, the problem lies in the nature of OIS systems itself — when the whole lens is moving and compensating for motion, the resulting image may be slightly obscured due to internal components getting in the way.
Their proposed solution? To capture two images at a time, first with OIS disabled and second with OIS enabled. Then software compares the two images and corrects any possible discrepancies between them for a shot with uniform brightness
This patent was originally filed back in 2010, a lifetime ago for the company, but with their recent innovations with OIS and imaging ,we can see this process in action sooner rather than later.
The issue is called lens shading, which could result in photos that, "may be brighter in the sensor and decrease in brightness when approaching the edges of the sensor array", according to Nokia's filing. From what we understand from the description, the problem lies in the nature of OIS systems itself — when the whole lens is moving and compensating for motion, the resulting image may be slightly obscured due to internal components getting in the way.
Their proposed solution? To capture two images at a time, first with OIS disabled and second with OIS enabled. Then software compares the two images and corrects any possible discrepancies between them for a shot with uniform brightness
This patent was originally filed back in 2010, a lifetime ago for the company, but with their recent innovations with OIS and imaging ,we can see this process in action sooner rather than later.
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