The camera spec does not tell how many pixels the camera has, saying instead that the sensor is of BSI type, has 2.0um pixels and 1/3-inch format. The camera has F2.0 lens with OIS. Both front and back cameras support HDR in stills and video mode.
Once we talk about HDR, the new Nvidia's Tegra 4i is the second application processor that supports "always-on HDR" imaging.
Update: CNET published HTC's director of special projects Symon Whitehorn comments on why HTC flagship smartphone has only 4MP resolution: "It's a risk, it's definitely a risk that we're taking. Doing the right thing for image quality, it's a risky thing to do, because people are so attached to that megapixel number."
HTC Ultrapixel page shows few illustrations:
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| HTC One vs iPhone 5 comparison |
HTC marketing efforts are aimed against high megapixel sensors:
Typical Smartphone CameraDifference
| HTC Zoe™ Camera with UltraPixels | ||
|---|---|---|
| Lens with F2.0 aperture | Lens with F2.8 aperture | 1.96x more light entry than F2.8 |
| 2.0um pixel size | ~1.4um pixel size (on typical 8MP sensors) ~1.1um pixel size (on typical 13MP sensors) | 2.04x more sensitivity than 1.4um 3.31x more sensitivty than 1.1um |
| 2-axis optical image stabilizer | 2-axis optical image stabilizer | Allowing longer exposure with more stability, resulting in higher quality photos with lower noise and better lowlight sensitivity |
| Real-time hardware HDR for video (~84db) | No video HDR (~54db) | ~1.5x more dynamic range with 84db compared to 54db in competitions |
HTC One camera spec:
| Sensor Type | CMOS BSI |
|---|---|
| Sensor Size | 1/3' |
| Sensor Pixel Size | 2um X 2um |
| Camera Full Size Resolution | 2688 x 1520 16:9 ratio JPEG Shutter speed up to 48fps with reduced motion blur |
| Video Resolutions | 1080P up to 30fps 720P up to 60fps 1080P with HDR up to 28fps 768x432 up to 96fps H.264 high profile, up to 20mbps |
| Focal Length of System | 3.82 mm |
| Optical F/# Aperture | F/2.0 |
| Number of Lens Elements | 5P |
| Optical Image Stabilizer | 2-axis, +/- 1 degree (average), 2000 cycles per second |
| ImageChip / ISP Enhancements | HTC continuous autofocus algorithm (~200ms), De-noise algorithm, color shading for lens compensation |
| Maximum frames per second | Up to 8fps continuous shooting |
