Originally Posted by knightrazor
Review from The Verge
If you watch the video, HTC One only has 4mp but claiming it that it has Ultrapixels. What does that mean?
Nothing. It's meaningless guff.
The HTC One has a slightly (VERY slightly) larger image sensor, and halves the number of pixels to roughly double photodiode area. That (should) mean much better low-light sensitivity and noise, but much worse resolution. (Still plenty for a typical consumer print, though.)
It simply trades off resolution for low light / noise performance. And the "Ultrapixel" doesn't exist. There have been numerous cameras in the past with the exact same pixel size as the HTC One, including camera phones. Few of them have been available for a few years, or made with current tech, but that's beside the point.
"Ultrapixel" is just a marketing brandname meant to give you the warm fuzzies and make you forget about megapixels.
Originally Posted by kkcheong
It means that the pixel is as huge as dSLR pixel.
This means that the quality of the camera pixel is like dSLR although its lower resolution.
Its like you use 10MP Canon dSLR but crop it in the middle. It is that awesome. Probably the best camera ever in smartfone. Will kill off every competitiors. Nokia Pureview also lose to dSLR camera in HTC ONE.
Complete and utter rubbish. The smallest pixel of any SLR belong to, if I'm not mistaken, the Nikon D3200. It has nearly double the pixel size of the HTC One's camera. And even a cheap consumer DSLR lens is in a different league to a smartphone lens, especially at the center of the image frame.
It is utterly unrealistic to expect even remotely similar per-pixel image quality from a DSLR and the HTC One, even for the central four megapixel crop.
Head of an Android household: HTC One X+ International 64GB, HTC One X International 32GB, Google Nexus 10, two hopelessly unstable Asus Eee Pad Transformers (32GB and 16GB, each with keyboard docks; remember -- friends don't let friends buy Asus), Samsung Galaxy Ace, and a Fuhu Nabi 2.