HTC One (M8) Duo Camera explained: always-on “refocus”

HTC One (M8) Duo Camera explained: always-on “refocus”
Last year's HTC One stood out of the crowd – it chose a 4-megapixel resolution with bigger pixel size, instead of what rivals opted for – 8 to 13-megapixels on a sensor of similar physical size. HTC called this “UltraPixel” camera, and claimed it will offer superior quality, especially in low light. Although most critics' opinions didn't praise it, HTC chose to use it again in this year's One. Resolution hasn't changed, but the camera now has a sidekick, in the form of a secondary lens/sensor combo, used for collecting depth of field information.

The depth of field information collected by the secondary lens (at the top) is stored with every photo, and allows to “refocus” the picture after the shot has been taken, by adding artistic out-of-focus blur effect (known as bokeh).

We know that you are now already jumping and shouting "hey, that's Nokia Refocus!" Alternatively, you might be shouting about Samsung's Selective Focus, that comes with the Galaxy S5, or Sony's Background Focus that's in the Xperia Z2, or LG's Magic Focus in the G Pro 2, depending on which camp you are in. Those technologies, however, take a few photos with different depth of focus setting in rapid succession (up to seven in the case of Nokia Lumia), and then ask you to select one, or merge them all together. To use these modes, you have to manually select them every time before taking the pic, and wait for the multiple photos to be captured.

In contrast, HTC's Duo Camera captures the depth information together with every photo, without causing any delays. You can apply the post-processing effect to all pictures you have taken, no matter if they were captured moments, or weeks ago. By knowing the depth of the scene, the One can automatically select which parts of the picture to blur, in order to emulate this DSLR-like bokeh out-of-focus artistic blur. Other options are to add color or augmented reality effects. Check out the slideshow below to see HTC's demos.

The method for collecting the additional depth (distance) information may also help for faster auto-focus – HTC says it is “faster than ever, capable of focusing in 0.3 of a second.“ This matches the result that Samsung touted for the S5 as “world's fastest.” In the case of the S5 however, these results are achieved thanks to a phase-detection auto-focus system (first in a phone). 

There are improvements in the flash too – it features a new duo LED Smart Flash system with two differently colored LEDs, similar to what Apple uses for the iPhone 5s. It illuminates the cool and warm LEDs in one of over a five hundred unique color temperature combinations, for more accurate color reproduction with less “flash color tint”.

The new HTC One doesn't feature optical image stabilization, since the technology is not possible with dual-lens camera systems. HTC claims that its digital Smart Stabilization works just as well, but we will have to test it before we pass any verdict.

Check out the effects that the new Duo Camera makes possible, in the slideshow below, and our own live demonstration in the following video.

Related phones

One (M8)
  • Display 5.0" 1080 x 1920 pixels
  • Camera 4 MP / 5 MP front
  • Processor Qualcomm Snapdragon 801, Quad-core, 2300 MHz
  • Storage 32 GB + microSDXC
  • Battery 2600 mAh(20h 3G talk time)



1. surethom

Posts: 1714; Member since: Mar 04, 2009

The sensor is the same four megapixel backside, NO NO NO, the output photo Is just Too small . Massive shame & mistake, it should have been 6 megapixel ultrapixel), apart from this I love the phone :( No OIS is also a No No, prefer OIS to changing the focus after the photo is taken.

2. Astoni

Posts: 649; Member since: Sep 28, 2013

Extremely unsharp pics, even the HTC one wasn't this bad. I hope for HTC's sake these pics are 100% to show effect and 0% care of quality when taken.

8. cheeseycheeser

Posts: 413; Member since: Mar 24, 2011

They're all so out of focus (not just the ones that are supposed to be). The subjects are stretched on the sides and they're just crappy photos! And these are the factory photos!

3. Ubi2447

Posts: 131; Member since: Feb 14, 2012

God what a shame. Looks like I'm waiting for the LG G3 :/

4. SlowPoison77

Posts: 28; Member since: Nov 30, 2013

1st thing HTC one 2013 pics are not that bad, its good. and if this is dual cam then the final output pic will be better so 4mp with dual camera is ok, OIS is not possible with dual camera. i m ready for upgrade, bring it in INDIA

5. hafini_27

Posts: 951; Member since: Oct 31, 2013

Most of these are gimmicks. Still the camera, why HTC?

6. tasior

Posts: 265; Member since: Nov 04, 2012

That's pretty unusual thinking. People were complaining, about our camera quality. Solution? Lets put two cameras in next model. That will help...

7. sergiobr

Posts: 718; Member since: Feb 25, 2013

The article says ... "by adding artistic out-of-focus blur effect " who cares ???? I want some good photos that I can expand to see details, simple like that htc !

9. edmundzea

Posts: 7; Member since: Sep 10, 2012

Nokia Refocus!" Alternatively, you might be shouting about Samsung's Selective Focus , that comes with the Galaxy S5 , or Sony's Background Focus that's in the Xperia Z2, or LG's Magic Focus in the G Pro 2," Nokia refocus sounds cooler

10. Ikechukwu

Posts: 252; Member since: Oct 03, 2011

You nailed it, Nokia Refocus does even a better job without using dual cameras.

11. KillerKeyboard

Posts: 372; Member since: Nov 21, 2013

HTC's future seems "Bokeh".

12. pravakarkfl

Posts: 1; Member since: Apr 11, 2016

how to enable blur mode on one_M8 ? also when it gets os 6 upgrade.

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