Nokia teases PureView for Windows Phone but what would it look like?

The Nokia PureView 808

It’s a big question whether or not Nokia’s upcoming lineup will feature any PureView technology in it. While it’s nice to dream of a 41MP camera alongside Windows Phone 8, we’re holding down our excitement until we learn more because so far we have seen little to make us believe otherwise.

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Now, the Nokia team (via Twitter) have teased users with the following exchange between themselves and Philip G. He was asking and hoping for some PureView love in the next Lumia series form Nokia. Nokia replied with the following:

“Just keep your eyes and ears open in the next coming weeks....”

That certainly seems like a reference to the joint Microsoft announcement that Nokia is hosting in a few weeks here in New York.  From our own sources, we’ve been leaning towards no PureView device this time but instead slightly further down the road, as Nokia plans to release numerous Windows Phones over the next year.

With Nokia’s tweet though, we could be looking at something sooner. But the question for us is What is PureView exactly?

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Nokia hints at something big next month

It seems like a silly question but the answer is not necessarily a 41MP sensor measuring in at 1/1.2" for the camera but rather the software technology behind it, specifically the oversampling feature. That’s really the secret behind PureView because although shooting at 41MP sounds impressive, it’s the ability to shoot at 5MP by default and doing some fancy software tricks for a clearer image. Ars Technica explained it thusly:

“At its default 5MP setting, every pixel in the finished image corresponds to about eight pixels on the sensor. This oversampling helps reduce noise, increase color accuracy, and increase sharpness… oversampling reduces the softening effects of the Bayer filter, the anti-aliasing filter, and diffraction of the tiny lens, resulting in sharper images.This type of oversampling is actually something you have probably seen quite often without even realizing it. If you have ever viewed an image in Photoshop at less than 100 percent view, you have seen the same effect.”

In other words, a PureView Windows Phone would not necessarily need a 41MP camera to have the same technology as found in the Nokia 808. That’s good news because as far as we know, Windows Phone 8 devices will be primarily using Qualcomm’s S4 chipset. So what would that mean for Apollo?

Windows Phone PureView

Alleged Windows Phone PureView device (from April)

WARNING: You are now entering the speculation zone

From Qualcomm’s own spec sheets, the S4 is a mighty impressive chipset but alas, it’s not the most powerful, particularly in regards to the camera:

“…the Snapdragon S4 can capture up to 20 megapixel images, 1080p video capture and has overall speed and image quality enhancements, including image stabilization.”

As far as we can tell, 20MP is about as high as we can expect for a Nokia PureView camera phone running Windows Phone 8—at least during this first release.

The Nokia 808, on the other hand, sports a 1.3 GHz ARM 11 CPU with a Broadcom BCM2763 multi-media processor. It also runs the Qualcomm S2 (MSM8255) chipset for the radio but evidently the camera functions are bypassed for the more capable Broadcom chipset.

That adds both cost and size to the device as opposed to the more economical single system on chip (SoC) S2 or S4 option. That is the point of SoC after all, to have the entire chipset on one board with features enabled or disabled based on the OEM’s need.

The PureView 808 camera sensor eats the Samsung GSIII one for breakfast

We can’t say for certain if those latter 808 technologies have been adopted for Windows Phone 8 but we have not seen any indication that they have just yet. Meanwhile, Qualcomm is boasting about their S4 support, which we imagine most OEMs will be using for their Windows Phone 8 series of devices.

That leaves two possible options that we can discern for a potential PureView Windows Phone:

  1. A full-on PureView Windows Phone with the 808 technology on board plus the more advanced S4 Qualcomm chipset for dual-core CPU support, LTE, etc. This will be more costly and result in a larger device due to the extra chipset needed to power the camera.
  2. A reduced PureView device running just the Qualcomm S4 with a maxed-out 20MP camera plus the PureView software enhancement of image oversampling.

Although we’re just going on pure guess work here, if we had to place bets it would be on the latter—a reduced MP camera in a device that still retains the core of the PureView technology. That would allow Nokia to keep costs down, maintain ease in mass production and keep the proposed device relatively thin.

But then again, when Nokia introduced the PureView 808 with a 41MP camera back months ago, the room was filled with press and fans who literally gasped when it was revealed. That means Nokia has a lot of tricks up their sleeve and it’s still too early to predict what they plan to reveal.

via: My Nokia Blog; Image sensor via All About Symbian

Daniel Rubino

Daniel Rubino is the Editor-in-chief of Windows Central. He is also the head reviewer, podcast co-host, and analyst. He has been covering Microsoft since 2007, when this site was called WMExperts (and later Windows Phone Central). His interests include Windows, laptops, next-gen computing, and watches. He has been reviewing laptops since 2015 and is particularly fond of 2-in-1 convertibles, ARM processors, new form factors, and thin-and-light PCs. Before all this tech stuff, he worked on a Ph.D. in linguistics, watched people sleep (for medical purposes!), and ran the projectors at movie theaters because it was fun.